Page 1 PART NO. ENMABA-3-2 Operator’s Manual Hydraulic Excavator URL:http://www.hitachi-c-m.com Serial No. ZX17U 020001 and up ZX26U 030001 and up PRINTED IN THE NETHERLANDS 2020, 04...
Page 2 INTRODUCTION Read this manual carefully to learn how to operate and Warranty is provided as a part of Hitachi’s support service your machine correctly. Failure to do so could program for customers who operate and maintain their result in personal injury or equipment damage.
Page 3 MACHINE NUMBERS INDEX SAFETY VISIBILITY MAP SAFETY SIGNS COMPONENTS NAME GETTING ON/OFF THE MACHINE OPERATOR’S STATION BREAK-IN OPERATING THE ENGINE DRIVING THE MACHINE OPERATING THE MACHINE TRANSPORTING MAINTENANCE MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS STORAGE TROUBLESHOOTING SPECIFICATIONS OPTIONAL ATTACHMENT INDEX ENMABA-3-2...
Page 5: Table Of Contents
CONTENTS MACHINE NUMBERS ................1 Avoid Applying Heat to Lines Containing Flammable Fluids ................... S-36 SAFETY ....................S-1 Precautions for Handling Accumulator (ZX26U-5A) ..S-36 Recognize Safety Information ............S-1 Remove Paint Before Welding or Heating ......S-37 Understand Signal Words .............S-1 Beware of Asbestos and Silicon Dust and Other Follow Safety Instructions ............S-2 Contamination ................. S-37 Prepare for Emergencies ...............S-3 Prevent Battery Explosions ............S-38 Wear Protective Clothing..............S-3 Handle Chemical Products Safely ........... S-39 Protect Against Noise ..............S-4 Dispose of Waste Properly ............
Page 6 CONTENTS Seat Back Box ................. 1-15 TRANSPORTING ................6-1 Emergency Exit (ZX26U-5A) (Cab equipped machine) ... 1-16 Transporting by Road ..............6-1 Seat Belt ................... 1-17 Loading/Unloading on a Truck ...........6-2 Room Lamp (ZX26U-5A) (Cab equipped machine) ..1-17 Fastening Machine for Transporting ........6-5 Unloading ..................6-6 BREAK-IN ...................2-1 Lifting Machine ................6-7 Breaking in New Machine ............2-1 MAINTENANCE ................7-1 OPERATING THE ENGINE ............3-1 Correct Maintenance and Inspection Procedures ....7-1 Inspect Machine Daily Before Starting ........3-1 Check the Hour Meter Regularly ..........7-2...
Page 7 CONTENTS Check and Replace Bucket Teeth ........7-73 Change Bucket ................. 7-75 Adjust Track Sag (Rubber Crawler) and Check for Damage ................. 7-76 Replace Rubber Crawler ............7-78 Check and Replace Seat Belt ..........7-81 Clean Cab Floor (ZX26U-5A) (Cab equipped machine) ................7-82 Check, Clean and Function Check of Injection Nozzle ..................7-83 Inspect and Adjust Valve Clearance ......... 7-83 Check and Adjust Injection Timing ........7-83 Measure Engine Compression Pressure......7-83 Check Starter and Alternator ..........7-83 Check Crankcase Breather ...........
Page 8 CONTENTS MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Page 9 MACHINE NUMBERS The manufacturing Nos. explained in this group are the individual numbers (serial No.) given to each machine and hydraulic components. These numbers are requested when inquiring any information on the machine and/or components. Fill these serial Nos. in the blank spaces in this group to immediately make them available upon request. Machine ZX17U-5A MABA-00-001 SS3097499 1. MODEL/TYPE 2. Product Identification Number 3. Year of Manufacturing 4. Operating mass (No additional counter weight version) ZX26U-5A MABA-00-002 5. Mass of additional counter weight 6. Engine power in KW according to ISO 14396: 2002 Product Identification Number PRODUCT IDENTIFICATION NUMBER:...
Page 10: Machine Numbers
MACHINE NUMBERS Engine TYPE: MFG. NO.: MABA-00-003 ZX17U-5A MABA-00-004 ZX26U-5A Travel Motor TYPE: MFG. NO.: MABA-00-005 ZX17U-5A MABA-00-006 ZX26U-5A...
Page 11 MACHINE NUMBERS Swing Motor TYPE: MFG. NO.: MABA-00-007 ZX17U-5A MABA-00-008 ZX26U-5A Hydraulic Pump TYPE: MFG. NO.: ZX17U-5A MABA-00-009 ZX26U-5A MABA-00-010...
Page 12 MACHINE NUMBERS MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Page 13: Safety
SAFETY Recognize Safety Information  These are the SAFETY ALERT SYMBOLS.  When you see these symbols on your machine or in this manual, be alert to the potential for personal injury.  Follow recommended precautions and safe operating practices. SA-2644 Understand Signal Words  On machine safety signs, signal words designating the degree or level of hazard - DANGER, WARNING, or CAUTION - are used with the safety alert symbol.  DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Page 14: Follow Safety Instructions
 Do not modify any machine parts without authorization. Failure to do so may deteriorate the part safety, function, and/or service life. In addition, personal accident, machine trouble, and/or damage to material caused by unauthorized modifications will void Hitachi Warranty Policy.  Do not use attachments and/or optional parts or equipment not authorized by Hitachi. Failure to do so may deteriorate the safety, function, and/or service life of the machine. In addition, personal accident, machine trouble, and/or damage to material caused by using unauthorized attachments and/or optional parts or equipment will void Hitachi Warranty Policy.  The safety messages in this SAFETY chapter are intended to illustrate basic safety procedures of machines.
Page 15: Prepare For Emergencies
SAFETY Prepare for Emergencies  Be prepared if a fire starts or if an accident occurs.  Keep a first aid kit and fire extinguisher on hand.  Thoroughly read and understand the label attached on the fire extinguisher to use it properly.  To ensure that a fire extinguisher can be always used when necessary, check and service the fire extinguisher at the recommended intervals as specified in the fire extinguisher manual.
Page 16: Protect Against Noise
SAFETY Protect Against Noise  Prolonged exposure to loud noise can cause impairment or loss of hearing.  Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortably loud noises. SA-434 Inspect Machine  Inspect your machine carefully each day or shift by walking around it before you start it to avoid personal injury.  In the walk-around inspection be sure to cover all points described in the "Inspect Machine Daily Before Starting" section in the operator’s manual.
Page 17: General Precautions For Cab
SAFETY General Precautions for Cab  Before entering the cab, thoroughly remove all dirt and/or oil such as mud, grease, soil or stones that may mess up the cab from the soles of your work boots. If any controls such as a pedal is operated while with dirt and/or oil on the soles of the operator’s work boots, the operator’s foot may slip off the pedal, possibly resulting in a personal accident.  Do not mess up around the operator’s seat with parts, tools, soil, stones, obstacles that may fold up or turn over, cans or lunch box. The levers or pedals become inoperable if obstacle jams in operation stroke of the travel levers/pedals, pilot control shut-off lever or control...
Page 18: Use Handrails And Steps
SAFETY Use Handrails and Steps  Falling is one of the major causes of personal injury.  When you get on and off the machine, always use the crawler instead of the step for safety. Also get on and off from the position of the crawler that can secure your feet space enough.
Page 19: Ensure Safety Before Rising From Or Leaving Operator's Seat
SAFETY Ensure Safety Before Rising from or Leaving Operator’s Seat  Before rising from the operator’s seat to open/close either side window or to adjust the seat position, be sure to first lower the front attachment to the ground and then move the pilot control shut-off lever to the LOCK position. Failure to do so may allow the machine to unexpectedly move when a body part unintentionally comes in contact with a control lever, possibly resulting in serious personal injury or death.
Page 20: Move And Operate Machine Safely
SAFETY Move and Operate Machine Safely  Bystanders can be run over.  Take extra care not to run over bystanders. Confirm the location of bystanders before moving, swinging, or operating the machine.  Always keep the travel alarm and horn in working condition (if equipped). It warns people when the machine starts to move.  Use a signal person when moving, swinging, or operating the machine in congested areas.
Page 21: Jump Starting
SAFETY Jump Starting  Battery gas can explode, resulting in serious injury.  If the engine must be jump started, be sure to follow the instructions shown in the “OPERATING THE ENGINE” chapter in the operator’s manual.  The operator must be in the operator’s seat so that the machine will be under control when the engine starts. Jump starting is a two-person operation.
Page 22: Precautions For Operations
SAFETY Precautions for Operations  Investigate the work site before starting operations.  Be sure to wear close fitting clothing and safety equipment appropriate for the job, such as a hard hat, etc. when operating the machine.  Clear all persons and obstacles from area of operation and machine movement. Do not permit persons other than the operator to enter areas where there is danger such as flying objects.
Page 23: Investigate Job Site Beforehand
SAFETY Investigate Job Site Beforehand  When working at the edge of an excavation or on a road shoulder, the machine could tip over, possibly resulting in serious injury or death.  Investigate the configuration and ground conditions of the job site beforehand to prevent the machine from falling and to prevent the ground, stockpiles or banks from collapsing.  Make a work plan. Use machines appropriate to the work and job site.
Page 24: Install Opg Guard
 Reduce the engine speed.  Select slow travel speed mode.  Operate the machine slowly and be cautious with machine movements. Install OPG Guard In case the machine is operated in areas where the possibilities of falling stones or debris exist, equip Hitachi OPG guard. Consult your authorized dealer for installing the OPG guard. The guard can be compliant with ROPS standards depending on the machine specifications. In order not to impair operator protective structure: Replace damaged ROPS or OPG guard. Never attempt to repair or modify the guard.
Page 25: Restriction Of Attachment Installation
SAFETY Restriction of Attachment Installation  Do not install an attachment which exceeds specified weight for the machine structure. Provide Signals for Jobs Involving Multiple Machines  For jobs involving multiple machines, provide signals commonly known by all personnel involved. Also, appoint a signal person to coordinate the job site. Make sure that all personnel obey the signal person’s directions. SA-481 Confirm Direction of Machine to Be Driven  Incorrect travel pedal/lever operation may result in serious injury or death.
Page 26: Drive Machine Safely
SAFETY Drive Machine Safely  Before driving the machine, always confirm that the travel levers/pedals direction corresponds to the direction you wish to drive.  Be sure to detour around any obstructions.  Avoid traveling over obstructions. Soil, fragments of rocks, and/or metal pieces may scatter around the machine. Do not allow personnel to stay around the machine while traveling. SA-1295  Driving on a slope may cause the machine to slip or overturn, possibly resulting in serious injury or death.
Page 27 SAFETY  When the machine descends a slope at high speed, machine weight accelerates descending speed. It may cause collision accident due to misjudging of braking distance or machine turnover due to running on an unexpected obstacle. Before descending a slope, always ensure that engine control lever (1) is in the slow idle position, and then reduce the engine speed.
Page 28: Avoid Injury From Rollaway Accidents
SAFETY Avoid Injury from Rollaway Accidents  Death or serious injury may result if you attempt to mount or stop a moving machine. To avoid rollaways:  Select level ground when possible to park the machine.  Do not park the machine on a grade.  Lower the bucket and/or other work tools to the ground.  Run the engine at slow idle speed without load for 5 minutes to cool down the engine.  Stop the engine and remove the key from the key switch.
Page 29: Avoid Injury From Back-Over And Swing Accidents
SAFETY Avoid Injury from Back-Over and Swing Accidents  If any person is present near the machine when backing or swinging the upperstructure, the machine may hit or run over that person, resulting in serious injury or death. To avoid back-over and swing accidents:  Always look around BEFORE YOU BACK UP AND SWING THE MACHINE. BE SURE THAT ALL BYSTANDERS ARE CLEAR.  Keep the travel alarm in working condition (if equipped). ALWAYS BE ALERT FOR BYSTANDERS MOVING INTO THE WORK AREA. USE THE HORN OR OTHER SIGNAL TO WARN BYSTANDERS BEFORE MOVING MACHINE.  USE A SIGNAL PERSON WHEN BACKING UP IF YOUR VIEW IS OBSTRUCTED. ALWAYS KEEP THE SIGNAL PERSON IN SA-383 VIEW.
Page 30: Keep Person Clear From Working Area
SAFETY Keep Person Clear from Working Area  A person around the operating machine may be hit severely by the swinging front attachment or counterweight, be caught in other objects, and/or be struck by flying objects, resulting in serious injury or death.  Set up barriers and/or put a NO ADMISSION sign at the machine operating site and areas exposed by flying objects to prevent anyone from entering the work area.  Check that all personnel or obstacles other than the signal person are not present in the working area before operating the machine.
Page 31: Avoid Undercutting
SAFETY Avoid Undercutting  In order to retreat from the edge of an excavation if the footing should collapse, always position the undercarriage perpendicular to the edge of the excavation with the travel motors at the rear.  If the footing starts to collapse and if retreat is not possible, do not panic. Often, the machine can be secured by lowering the front attachment, in such cases. SA-1300 Avoid Tipping DO NOT ATTEMPT TO JUMP CLEAR OF TIPPING MACHINE --- SERIOUS OR FATAL CRUSHING INJURIES WILL RESULT MACHINE WILL TIP OVER FASTER THAN YOU CAN JUMP...
Page 32: Never Undercut A High Bank
SAFETY Never Undercut a High Bank  The edges could collapse or a land slide could occur causing serious injury or death. SA-1302 Dig with Caution  Accidental severing of underground cables or gas lines may cause an explosion and/or fire, possibly resulting in serious injury or death.  Before digging check the location of cables, gas lines, and water lines.
Page 33: Avoid Power Lines
SAFETY Avoid Power Lines  Serious injury or death can result if the machine or front attachments are not kept at a safe distance from electric lines.  When operating near an electric line, NEVER move any part of the machine or load closer than 3 m (10 ft) plus twice the line insulator length.  Check and comply with any local regulations that may apply.  Wet ground will expand the area that could cause any SA-1305 person on it to be affected by electric shock. Keep all bystanders or co-workers away from the site. Precautions for Lightning  Lightning may strike the machine. If lightning comes close, immediately stop the operation, and take the following action.  When you are around the machine or operating cab- less machine, evacuate to a safe place far away from the machine.
Page 34: Object Handling
SAFETY Object Handling  If a lifted load should fall, any person nearby may be struck by the falling load or may be crushed underneath it, resulting in serious injury or death.  When using the machine for craning operations, be sure to comply with all local regulations.  Do not use damaged chains or frayed cables, sables, slings, or ropes.  Before craning, position the upperstructure with the travel motors at the rear.
Page 35: Protect Against Flying Debris And Falling Object
SAFETY Protect Against Flying Debris and Falling Object  During hammer operation, debris from earth, rock or metal may fly in all directions, resulting in a serious personal injury or death.  When driving the connecting pins in or out, wear goggle or safety glasses, hard hat and face shield. SA-432  During machine operation, debris from earth, rock or metal may fly off from the track and bucket, resulting in a serious personal injury or death.  Ensure nobody presents in or around the work area while machine is operating.
Page 36: Park Machine Safely
SAFETY Park Machine Safely To avoid accidents:  Park machine on a firm, level surface.  Lower bucket to the ground.  Run engine at slow idle speed without load for 5 minutes.  Turn key switch to the OFF position to stop engine.  Remove the key from the key switch.  Pull the pilot control shut-off lever to the LOCK position.  Close windows, roof vent, and cab door.  Lock all access doors and compartments. SA-1306 Handle Fluids Safely−Avoid Fires ...
Page 37: Transport Safely
SAFETY Transport Safely  Take care the machine may turn over when loading or unloading the machine onto or off of a truck or trailer.  Observe the related regulations and rules for safe transportation.  Select an appropriate truck or trailer for the machine to SA-1307 be transported.  Be sure to use a signal person.  Always follow the following precautions for loading or unloading: 1. Select solid and level ground. 2. Always use a ramp or deck strong enough to support the machine weight. 3. Select the slow travel mode for loading or unloading the machine.
Page 38: Practice Safe Maintenance
SAFETY Practice Safe Maintenance To avoid accidents:  Understand service procedures before starting work.  Keep the work area clean and dry.  Do not spray water or steam inside cab.  Never lubricate or service the machine while it is moving.  Keep hands, feet and clothing away from power-driven parts. Before servicing the machine: 1. Park the machine on a level surface. 2. Lower the bucket to the ground. 3. Run the engine at slow idle speed without load for 5 minutes. 4. Turn the key switch to the OFF position to stop engine. 5.
Page 39: Warn Others Of Service Work
SAFETY  Sufficiently illuminate the work site. Use a maintenance work light when working under or inside the machine.  Always use a work light protected with a guard. In case the light bulb is broken, spilled fuel, oil, antifreeze fluid, or window washer fluid may catch fire. SA-037 Warn Others of Service Work  Unexpected machine movement can cause serious injury.  Before performing any work on the machine, attach a “Do Not Operate” tag on the control lever. This tag is available from your authorized dealer. SS2045102-4 S-27...
Page 40: Support Machine Properly
SAFETY Support Machine Properly  Never attempt to work on the machine without securing the machine first.  Always lower the attachment to the ground before you work on the machine.  If you must work on a lifted machine or attachment, securely support the machine or attachment. Do not support the machine on cinder blocks, hollow tires, or props that may crumble under continuous load. Do not work under a machine that is supported solely by a jack. SA-527 Stay Clear of Moving Parts  Entanglement in moving parts can cause serious injury.  To prevent accidents, care should be taken to ensure that hands, feet, clothing, jewelry and hair do not become entangled when working around rotating parts.
Page 41: Prevent Parts From Flying
SAFETY Prevent Parts from Flying  Grease in the track adjuster is under high pressure. Failure to follow the precautions below may result in serious injury, blindness, or death.  Do not attempt to remove GREASE FITTING or VALVE ASSEMBLY.  As pieces may fly off, be sure to keep body and face away from valve.  Never attempt to disassemble the track adjuster. Inadvertent disassembling of the track adjuster may cause the parts such as a spring to fly off, possibly resulting in severe personal injury or death.
Page 42: Prevent Burns
SAFETY Prevent Burns Hot spraying fluids:  After operation, engine coolant is hot and under pressure. Hot water or steam is contained in the engine, radiator and heater lines. Skin contact with escaping hot water or steam can cause severe burns.  To avoid possible injury from hot spraying water. DO NOT remove the radiator cap until the engine is cool. When opening, turn the cap slowly to the stop. Allow all pressure to be released before removing the cap.  The hydraulic oil tank is pressurized. Again, be sure to SA-039 release all pressure before removing the cap.
Page 43: Replace Rubber Hoses Periodically
SAFETY Replace Rubber Hoses Periodically  Rubber hoses that contain flammable fluids under pressure may break due to aging, fatigue, and abrasion. It is very difficult to gauge the extent of deterioration due to aging, fatigue, and abrasion of rubber hoses by inspection alone.  Periodically replace the rubber hoses. (See the page of “Periodic replacement of parts” in the operator’s manual.)  Failure to periodically replace rubber hoses may cause a fire, fluid injection into skin, or the front attachment to fall on a SA-019 person nearby, which may result in severe burns, gangrene, or otherwise serious injury or death.
Page 44: Prevent Fires
SAFETY Prevent Fires Check for Oil Leaks:  Fuel, hydraulic oil and lubricant leaks can lead to fires.  Check for oil leaks due to missing or loose clamps, kinked hoses, lines or hoses that rub against each other, damage to the oil-cooler, and loose oil-cooler flange bolts.  Tighten, repair or replace any missing, loose or damaged clamps, lines, hoses, oil-cooler and oil-cooler flange bolts.  Do not bend or strike high-pressure lines.  Never install bent or damaged lines, pipes, or hoses. ...
Page 45 SAFETY Clean up Flammable Materials:  Spilled fuel and oil, and trash, grease, debris, accumulated coal dust, and other flammable materials may cause fires.  Prevent fires by inspecting and cleaning the machine daily, and by removing adhered oil or accumulated flammable materials immediately. Check and clean high temperature parts such as the exhaust outlet and mufflers earlier than the normal interval.  Do not wrap high temperature parts such as a muffler or exhaust pipe with oil absorbents.  Do not store oily cloths as they are vulnerable to catching fire. ...
Page 46: Evacuating In Case Of Fire
SAFETY Evacuating in Case of Fire  If a fire breaks out, evacuate the machine in the following way:  Stop the engine by turning the key switch to the OFF position if there is time.  Use a fire extinguisher if there is time.  Exit the machine.  In an emergency, if the cab door or front window can not be opened, break the front or rear window panes with the emergency evacuation hammer to escape from the cab. Refer to the explanation pages on the Emergency SA-393 Evacuation Method.
Page 47: Precautions For Welding And Grinding
SAFETY Precautions for Welding and Grinding  Welding may generate gas and/or small fires.  Be sure to perform welding in a well ventilated and prepared area. Store flammable objects in a safe place before starting welding.  Only qualified personnel should perform welding. Never allow an unqualified person to perform welding.  Grinding on the machine may create fire hazards. Store flammable objects in a safe place before starting grinding.  After finishing welding and grinding, recheck that there are no abnormalities such as the area surrounding the welded area still smoldering.
Page 48: Avoid Heating Near Pressurized Fluid Lines
Strictly comply with the following items:  Do not disassemble the unit.  Keep the unit away from open flames and fire.  Do not attempt to bore a hole or cut by torch.  Avoid giving shocks by hitting or rolling the unit.  Before disposing the unit, sealed gas must be released. Consult your nearest Hitachi dealer. S-36...
Page 49: Remove Paint Before Welding Or Heating
 Keep bystanders out of the work site during operation.  Asbestos fibers might be present in imitation parts. Use only genuine Hitachi Parts. S-37...
Page 50: Prevent Battery Explosions
SAFETY Prevent Battery Explosions  Battery gas can explode.  Keep sparks, lighted matches, and flame away from the top of battery.  Never check battery charge by placing a metal object across the posts. Use a voltmeter or hydrometer.  Do not charge a frozen battery; it may explode. Warm the battery to 16 ˚C ( 60 ˚F ) first.  Do not continue to use or charge the battery when electrolyte level is lower than specified. Explosion of the battery may result.  Loose terminals may produce sparks. Securely tighten all SA-032 terminals.  Connect terminals to the correct electrical poles. Failure to do so may cause damage to the electrical parts or fire.
Page 51: Handle Chemical Products Safely
 See your authorized dealer for SDS’s (available only in SA-2579 English) on chemical products used with your machine. Dispose of Waste Properly  Improperly disposing of waste can threaten the environment and ecology. Potentially harmful waste used with Hitachi equipment includes such items as oil, fuel, coolant, brake fluid, filters, and batteries.  Use leakproof containers when draining fluids. Do not use food or beverage containers that may mislead someone into drinking from them.  Do not pour waste onto the ground, down a drain, or into any water source.
Page 52: Never Ride Attachment
SAFETY Never Ride Attachment Never allow anyone to ride attachments or load. This is an extremely dangerous practice. Precautions for Communication Terminal Electrical wave transmitted from the communication terminal may cause malfunction of other electronic devices. Inquire the device manufacturer for electrical wave disturbance upon using an electronic device near the communication terminal.
Page 53: Visibility Map
VISIBILITY MAP Visibility Map for Machine Model ZX17U-5A series Personal Hazard This machine complies with the essential health and safety requirements for visibility set out by Machinery Directive 2006/42/EC. The map shows the residual maskings (blind spots) observed by a seated operator (wearing the recommended seat restraint) in the cab using direct vision and the standard visual aids supplied with the machine. This map shows an approximation of the residual masking. This can be used as a guide when conducting a site risk assessment, utilized for site management and to consider additional visual aids. Conditions: Driver’s visibility on 1mRB and VTC are evaluated under ISO 5006.
Page 54 VISIBILITY MAP Visibility Map for Machine Model ZX26U-5A series Personal Hazard This machine complies with the essential health and safety requirements for visibility set out by Machinery Directive 2006/42/EC. The map shows the residual maskings (blind spots) observed by a seated operator (wearing the recommended seat restraint) in the cab using direct vision and the standard visual aids supplied with the machine. This map shows an approximation of the residual masking. This can be used as a guide when conducting a site risk assessment, utilized for site management and to consider additional visual aids. Conditions: Driver’s visibility on 1mRB and VTC are evaluated under ISO 5006.
Page 55: Safety Signs
SAFETY SIGNS All safety signs and their locations affixed on the machine are illustrated in this group. Make sure of the contents described in the safety signs through reading actual ones affixed on the machine to ensure safe machine operation. Always keep the safety signs clean. In case a safety sign is broken or lost, immediately, obtain a new replacement and affix it again in position on the machine. Use the part No. indicated under the right corner of each safety sign illustration when ordering it at your authorized dealer. SS4420332-2  Always read the Operator’s Manual before operating, MABA-00-022 ZX17U-5A servicing, disassembling, assembling, and transporting the machine.
Page 56 SAFETY SIGNS SS4420333-2 MABA-00-022 ZX17U-5A  If the parked machine is unexpectedly moved, serious injury or death due to crushing may result. Be sure to lower the front attachment to the ground, lock the control levers, and remove the engine key before leaving the machine unattended. MABA-00-023 ZX26U-5A ZX17U-5A MABC-00-003 SS4295807  Before starting engine, pilot control shut-off lever must be in up position. MABA-00-023 ZX26U-5A S-44...
Page 57 SAFETY SIGNS SS4420334-2  Electrocution is possible if the machine is operated too close to power lines. Always keep a safe distance from MABA-00-030 Canopy power lines. ZX17U-5A MABA-00-031 Canopy ZX26U-5A MABA-00-032 ZX26U-5A S-45...
Page 58 SAFETY SIGNS  Stand clear of the equipment. If knocked over by the equipment, serious injury may result. SS-1494 SS3085503-1 S-46...
Page 59 SAFETY SIGNS  Hot coolant or oil may spout if the radiator or hydraulic oil cap is removed while the machine temperature is still high, possibly causing a burn. Wait until the machine has cooled to remove the cap. MABA-00-024 ZX17U-5A SS4420336-2 ZX26U-5A ZX17U-5A SS4392290-1 ZX17U-5A MABA-00-025 MABA-00-026 ZX26U-5A MABA-00-027 ZX26U-5A S-47...
Page 60 SAFETY SIGNS  Sign indicates the hazard of rotating parts, such as fan, etc. that could cause injury by being caught. Turn it off completely before inspection and maintenance. ZX17U-5A MABA-00-013 ZX17U-5A SS4672424-2 ZX26U-5A SS4425442-1 ZX26U-5A MABA-00-028  Sign indicates the hazard of rotating parts, such as belt, etc. that could cause injury by being caught. Turn it off completely before inspection and maintenance.
Page 61 SAFETY SIGNS  Personal injury may result if the stored front window slips off. Always securely lock the window in the stored position (on the cab equipped machine). SS4425121-1 MABA-00-033 ZX26U-5A SS4392288-2  Serious injury may result if the plug flies off the track adjuster. Read the Operator’s Manual before loosening SS-1495 the track, and adjust the track sag following the correct procedure. S-49...
Page 62 SAFETY SIGNS SS4425443-1  Possible severe burns. Do not touch the engine components while they are hot. ZX17U-5A MABA-00-014 ZX26U-5A MABA-00-029 S-50...
Page 63 SAFETY SIGNS SS3078858-2  Personnel in the swing radius may be crushed by the upperstructure when the machine swings. Stand clear of the swing radius. MABC-00-006 ZX17U-5A ZX26U-5A MABC-00-007 SS4408870-2  Sign indicates the hazard of rotating parts, such as fan, etc. that could cause injury by being caught. ZX26U-5A MABA-00-029 Turn it off completely before inspection and maintenance. S-51...
Page 64 SAFETY SIGNS  If the machine should overturn, the operator may become injured and/or thrown from the cab and/or crushed by the overturning machine. SS4448289-1 CANOPY MABC-00-020 ZX17U-5A CANOPY ZX26U-5A MABC-00-021 MABC-00-022 ZX26U-5A S-52...
Page 65 SAFETY SIGNS SS4676482-0 Precautions for extending/retraction side frame  Operate the machine with the side frames retracted only when traveling on a flat narrow work site.  Except for the above operating conditions, always operate MABA-00-046 the machine with the side frames extended for travel, ZX17U-5A excavation, and blade operations. Failure to do so may cause the machine to turn over. S-53...
Page 66 SAFETY SIGNS SS-3644 SS-3645 CANOPY ZX17U-5A MABA-00-021 SS-3646 A machine attached with above certification meets strength authentication of operator’s station (such as ROPS/TOPS/TOP CANOPY Guard). ZX26U-5A Never attempt to modify the ROPS, TOPS or TOP Guard other MABC-00-024 than authorized personnel. If an operator’s station is detached or a bolt is installed/removed by unauthorized personnel, it may not comply with ROPS, TOPS or TOP Guard. Consult your nearest authorized dealer when any modification is required.
Page 67: Components Name
COMPONENTS NAME Components Name MABA-01-001 1- Counterweight 7- Bucket 13- Front Idler 2- Canopy 8- Bucket Cylinder 14- Track Frame 3- Boom 9- Work Light 15- Track Shoe 4- Boom Cylinder 10- Boom Swing Cylinder 16- Travel Device 5- Arm 11- Blade 6- Arm Cylinder 12- Blade Cylinder...
Page 68: Getting On/Off The Machine
GETTING ON/OFF THE MACHINE Getting ON/OFF the Machine Foothold (1) and handrails (4) are provided around the entrance. These are used to get on and off the cab safely as well as to do inspection and maintenance of the machine safely.
Page 69: Operator's Station
OPERATOR'S STATION Layout 12 13 ZX17U-5A 1- Left Control Lever 2- Left Travel Lever 3- Right Travel Lever 4- Swing Pedal 5- Right Control Lever/Horn Switch 6- Wrist Rest 7- Key Switch 8- Monitor 9- Seat Back Box (Optional) MABA-01-003 10- Seat Belt 11- Operator's Seat 12- Travel Mode Pedal 13- Auxiliary Pedal 14- Auxiliary Power (Optional) 15- Side Frame Extend/Retract Lever 16- Pilot Control Shut-Off Lever 17- Fuse Box 18- Selector Valve 19- Blade Lever MABA-01-004...
Page 70 OPERATOR'S STATION Layout ZX26U-5A 1- Left Control Lever 2- Left Travel Lever 3- Right Travel Lever 4- Swing Pedal 5- Right Control Lever/Horn Switch 6- Wrist Rest 7- Key Switch 8- Monitor 9- Seat Back Box (Optional) MABA-01-017 10- Seat Belt 11- Operator's Seat 12- FM/AM Radio (Cab equipped machine) (Optional) 13- Door Opener (Cab equipped machine) 14- Auxiliary Pedal 15- Auxiliary Power (Optional) 16- Pilot Control Shut-Off Lever 17- Fuse Box 18- Selector Valve 19- Blade Lever MABA-01-018 20- Numeric Keypad Lock System (Optional)
Page 71: Key Switch
OPERATOR'S STATION Key Switch 1- OFF (Engine Off ) 2- ON 3- START (Engine Start) 4- HEAT (Engine Preheat) Switch Panel 5- Work Light Switch Press switch (5) to turn ON work light (9) located on the M1M7-01-007 boom. 6- Travel Mode Switch (ZX26U-5A) 7- Heater Control Switch (ZX26U-5A) (Cab equipped machine) 8- Wiper Switch (ZX26U-5A) (Cab equipped machine) Three (operational) positions are provided on this switch. OFF: Neither the wiper nor the washer operates. Center: The wiper operates. Canopy WASHER: The washer operates together with the wiper.
Page 72: Monitor Panel
OPERATOR'S STATION Monitor Panel 1- Alternator Indicator 2- Fuel Level Indicator 3- Preheat Indicator 4- Overheat Indicator 5- Engine Oil Pressure Indicator 6- Hour Meter 7- Fuel Gauge M1NC-01-005 8- Coolant Temperature Indicator Alternator Indicator The red indicator will light when low alternator output is present. Check the electrical system such as the alternator and/or M178-01-038 battery system. Fuel Level Indicator When the remaining fuel level indicator comes ON at flat ground, the remaining fuel level is as follows.
Page 73: Overheat Indicator
OPERATOR'S STATION Overheat Indicator If the coolant temperature rises extremely high, this indicator lights. If the red light comes ON, the buzzer sounds at the same time. Immediately stop machine operation and reduce engine speed to the slow idle speed to lower the coolant temperature. M178-01-036 Engine Oil Pressure Indicator The red indicator will light when the engine oil pressure is low. If the red indicator comes ON, the engine oil pressure warning buzzer will sound at the same time.
Page 74: Cab Heater Operation (Zx26U-5A) (Cab Equipped Machine)
OPERATOR'S STATION Cab Heater Operation (ZX26U-5A) (Cab Equipped Machine) Heater Operation Turn heater cock (1) in the engine compartment counterclockwise. Adjust air flow by turning heater adjust knob (2) located at the right- rear in the operator’s station. Blower Operation Turn heater cock (1) in the engine compartment clockwise to close it. Adjust air flow following the same method as mentioned in the Heater Operation. MABA-01-011 Defroster Operation Adjust air flow by operating heater adjust knob (2). Remove clouding on the window pane by directing air flow from air vents (3) and (4) toward the window pane.
Page 75: Radio (Zx26U-5A) (Cab Equipped Machine) (Optional)
OPERATOR'S STATION Radio (ZX26U-5A) (Cab equipped machine) (Optional) 1- Radio/Clock MABA-01-013...
Page 76: Am/Fm Radio Operation
OPERATOR'S STATION AM/FM Radio Operation Part Name and Function 1- Power Switch Push this switch to turn ON/OFF the radio. 2- Sound Control Switch (SOUND) Push this switch to adjust sound (Balance/Bass/Treble). 3- Up/Down Buttons (UP/DOWN) M1NE-01-003 This button is used to change the radio wave frequency, adjust the sound parameter and the clock setting. 4- Display Time, radio receiving frequency and operation mode are displayed. 5- AM/FM Switch (AM/FM) "FM"...
Page 77: Tuning Procedure
OPERATOR'S STATION Tuning Procedure 1. Manual Tuning Procedure Push UP button (3) to increase the frequency by one step. Push DOWN button (3) to decrease the frequency by one step. 2. Automatic Tuning (Auto-Seeking) Push UP button (3) or DOWN button (3) long to scan the frequency upward or downward. When a station is received, the auto-seeking function is deactivated so M1NE-01-003 that the received frequency station is tuned in. Station Presetting Procedure 1. Select MW (AM) or FM by pushing AM/FM switch (5). 2. Push one of PRESET buttons (7) long to save the receiving frequency in memory. When the preset procedure completes, the PRESET button No. flashes 3 times and frequency display becomes ON. 3. Repeat steps 1 and 2 for other PRESET buttons (7).
Page 78: Sound Adjustment
OPERATOR'S STATION Sound Adjustment When SOUND control switch (2) is pressed with the radio switch ON, it will be in the sound adjustment state. Each time SOUND control switch (2) is pressed, the adjustment item can be changed as below. BAL  TRE  BAS  BAL  TRE  BAS When SOUND control switch (2) is pressed with the BAS state, the sound adjustment is deactivated. • Sound Adjustment (Balance Control) When UP button (3) is pressed with the BAL state, M1NE-01-003 loudspeaker output is increased from R output by one step. When DOWN button (3) is pressed with the BAL state, loudspeaker output is decreased from L output by one step. • Sound Adjustment (Treble Control) When UP button (3) is pressed with the TRE state, treble level is increased by one step. When DOWN button (3) is pressed with the TRE state, treble level is decreased by one step. • Sound Adjustment (Bass Control) When UP button (3) is pressed with the Bas state, bass level is increased by one step. When DOWN button (3) is...
Page 79: Door Lock Release Lever (Zx26U-5A) (Cab Equipped Machine)
OPERATOR'S STATION Door Lock Release Lever (ZX26U-5A) (Cab equipped machine) CAUTION: Open the door all the way until it securely locks in the latch on the side of the cab. To unlock the door, push down door lock release lever (1) located at the left side of the operator's seat. MABA-01-014 1-13...
Page 80: Opening Upper Front Window (Zx26U-5A) (Cab Equipped Machine)
OPERATOR'S STATION Opening Upper Front Window (ZX26U-5A) (Cab equipped machine) Front Window 1. Hold handles (1) at upper part of the front door and pull lock levers (2) with your finger. Release the lock to open the front window. 2. Pull the upper front window up and back along the rail until it securely activates lock levers (2) at the rear end. This time, use handle (3) on the lower front window. 3. After confirming that lock levers (2) are securely activated, slide lock pin (6) to lock the window in position. MADB-01-058 CAUTION:  Slowly close the upper front window so as not to catch a finger.
Page 81: Adjusting The Seat (Optional)
OPERATOR'S STATION Adjusting the Seat (Optional) Seat Fore-aft Adjustment Release the seat lock by pulling in adjuster bar (1) horizontally. Move the seat backward and forward. Seat fore-aft is adjustable. Adjustable range is as follows. Model Adjustable Range ZX17U-5A 14 Steps (140 mm in total) ZX26U-5A 11 Steps (110 mm in total) Seat Back Box MABA-01-007 Pocket (2) is located at the back side of the seat. Put the operator’s manual inside. MABA-01-008 1-15...
Page 82: Emergency Exit (Zx26U-5A) (Cab Equipped Machine)
OPERATOR'S STATION Emergency Exit (ZX26U-5A) (Cab equipped machine) Escape from the cab in emergency in the following methods: CAUTION: There is always a danger of falling when escaping from the cab in emergency, which may result in serious personal injury. Escape from the cab as safely as possible, depending on the posture of machine and the external situation.
Page 83: Seat Belt
OPERATOR'S STATION Seat Belt WARNING:  Be sure to use seat belt (1) when operating the machine.  Before operating the machine, be sure to examine seat belt (1) and the hardware attached for any failure. Replace seat belt (1) and the hardware attached if they are damaged and/or worn.
Page 84 OPERATOR'S STATION MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................1-18...
Page 85: Break-In
BREAK-IN Breaking in New Machine IMPORTANT: Operating a new machine at full load without first breaking in can cause scratches and/or seizures, consequently affecting the service life of the machine. Thoroughly perform the break-in operation. The service life and the performance of the machine can be greatly affected by operation and maintenance of the machine during the initial stage of operation. Perform the break- in operation with the engine output less than 80% of the...
Page 86 BREAK-IN MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Page 87: Operating The Engine
OPERATING THE ENGINE Inspect Machine Daily Before Starting Perform the required daily check before starting the engine. Engine  Level and contamination of engine oil and coolant*  Starting easiness, exhaust gas color, and noise  Oil and water leaks, damage to hoses and pipe lines  Clogging and damage to radiator, oil cooler  Looseness and missing of mounting bolts and nuts Upperstructure  Fuel level, leaks and contamination of fuel in tank*  Hydraulic oil level, leaks and contamination of hydraulic oil tank*...
Page 88: Before Starting Engine
OPERATING THE ENGINE Before Starting Engine 1. Confirm that pilot control shut-off lever (1) is in the LOCK position. 2. Confirm that all control levers are placed in neutral. 3. Check indicator bulbs as follows: Turn key switch to the ON position. All indicator lights and warning lamps will come on. They will stay on for approximately 2 seconds, except for alternator (3) and engine oil pressure (4) indicator, which will continue to stay on further.
Page 89: Starting The Engine
OPERATING THE ENGINE Starting the Engine Starting the Engine at Normal Temperature 1. Confirm that pilot control shut-off lever (1) is in the LOCK position. 2. Turn engine control lever (3) to the slow idle position. 3. Sound horn to alert bystanders. 4. Turn key switch (2) to START position to rotate the starter. The engine will start. IMPORTANT: Never operate the starter for more than 15 seconds at a time. If engine fails to start, return key switch to OFF.
Page 90 OPERATING THE ENGINE Starting in Cold Weather Preheating 1. Confirm that pilot control shut-off lever (1) is in the LOCK position. 2. Turn engine control lever (3) to around the middle between the slow idle and fast idle position. 3. Turn key switch (2) to the HEAT position; hold it until preheat indicator (4) turns OFF. 4. Sound the horn to alert bystanders. 5. As soon as preheat indicator (4) goes OFF, turn key switch (2) to START position to rotate the starter. IMPORTANT: Never operate the starter for more than 15 seconds at a time. If engine fails to start, return key switch to OFF.
Page 91: Check Instruments After Starting Engine
OPERATING THE ENGINE Check Instruments After Starting Engine Checking instruments through monitor functions After starting the engine, check the following points through the monitor functions. 1. Check that alternator alarm indicator (1) is OFF. In case alternator alarm indicator (1) stays ON, immediately stop the engine. Inspect the alternator and the battery system for any abnormality. 2. Check that engine oil pressure indicator (2) is OFF. In case engine oil pressure indicator (2) stays ON, M1NC-01-005 immediately stop the engine. Inspect the engine oil pressure system and the oil level.
Page 92: Using Booster Battery
OPERATING THE ENGINE Using Booster Battery WARNING:  An explosive gas is produced while battery is in use or being charged. Keep open flames and sparks away from the battery area. Do not continue to use or charge the battery when electrolyte level is lower than specified.
Page 93 OPERATING THE ENGINE Disconnecting the booster cables 1. Disconnect black booster negative (-) cable (2) from hinge (3) of the machine cover first. 2. Disconnect the other end of black booster negative (-) cable (2) from the booster battery. (Red) 3. Disconnect red booster positive (+) cable (1) from the booster battery. Machine Battery Booster Battery 4. Disconnect red booster positive (+) cable (1) from the (Black) Disconnect First machine battery. To hinge (3) of the machine tank cover M503-03-002...
Page 94: Stopping The Engine
OPERATING THE ENGINE Stopping the Engine Engine Stop Procedure 1. Except for special cases, before stopping the engine, lower the bucket and the blade to the ground. 2. Pull pilot control shut-off lever (1) to LOCK position. 3. Turn the engine control lever to the slow idle position and run the engine for 5 minutes to cool the engine. 4. Turn key switch (2) OFF to stop the engine. MABA-01-002 M1M7-01-007...
Page 95: Driving The Machine
DRIVING THE MACHINE Travel Levers (ZX17U-5A) Front Travel operation can be performed with the mechanical levers. WARNING: In the standard traveling position, the front idlers are located in front of the operator’s seat Blade and the travel motors at the rear. If the travel motors are positioned at the front of the machine, when the travel levers are operated in the direction as illustrated on the operation decals, the travel direction of the...
Page 96 DRIVING THE MACHINE • Pivot Turn Steer the machine by driving only one side crawler. Operate either of the travel levers. M1MF-04-001 M104-04-005 Pivot Turn • Spin Turn Steer the machine in a position by driving both side crawlers in opposite directions each other. Move one lever forward and pull the other back at the same time. CAUTION: During pivot or spin turn machine operations, the base machine may shake. When turning the machine in a tight area, slowly operate the machine while taking care not to allow the machine to come into contact with the surrounding objects.
Page 97: Travel Levers And Pedals (Zx26U-5A)
DRIVING THE MACHINE Travel Levers and Pedals (ZX26U-5A) Front Travel operation can be performed with either the levers or pedals. Blade WARNING: In the standard travel position, the front idlers are positioned at the front of the machine and the travel motors at the rear. If the travel motors are Left Right positioned at the front of the machine, the control...
Page 98 DRIVING THE MACHINE • Pivot Turn Steer the machine by driving only one side crawler. Operate either of the travel levers (or pedals). M1M7-04-012 M104-04-005 Pivot Turn • Spin Turn Steer the machine by driving each crawler in the opposite directions. Push one lever (or pedal) forward and pull the other back at the same time. WARNING: During pivot or spin turn machine operations, the base machine may shake. When turning the machine in a tight area, slowly operate the machine while taking care not to allow the machine to come in contact with the surrounding objects.
Page 99: Travel Mode Pedal (Zx17U-5A)
DRIVING THE MACHINE Travel Mode Pedal (ZX17U-5A) WARNING: Never attempt to shift the travel mode from the slow to fast while descending a slope. Return the travel levers to neutral once before shifting the travel mode. Depress the travel mode pedal (1) to select the fast travel mode while depressing. When release the travel mode pedal (1), return to the slow travel mode.
Page 100: Travel Mode Switch (Zx26U-5A)
DRIVING THE MACHINE Travel Mode Switch (ZX26U-5A) WARNING: Tipping-over accidents can cause serious personal injury. Do not change travel mode switch (1) while traveling; especially, changing to fast mode when descending slopes will create a very dangerous situation. Always stop the machine before changing the travel speed mode.
Page 101: Traveling
DRIVING THE MACHINE Traveling CAUTION: Use a signal person when traveling the machine along road shoulders or in congested areas. Coordinate hand signals before starting the machine.  Be sure to confirm the position of travel motors before traveling and operate the travel levers/pedals.  Select a travel route that is as flat as possible. Steer the machine as straight as possible, making small gradual changes in direction.
Page 102: Traveling On Soft Ground
DRIVING THE MACHINE Traveling on Soft Ground Avoid traveling on soft ground as much as possible. If traveling on a soft ground is unavoidable, carefully operate the machine while observing the following points. • Drive the machine as far as the machine can move by its own propelling power. Towing the machine may become necessary. Do not drive the machine to a deeper location than towing the machine is possible.
Page 103: Raise One Track By Using Boom And Arm
DRIVING THE MACHINE Raise One Track by Using Boom and Arm WARNING: Operate the machine carefully. The machine may slide. Keep the angle between the boom and the arm at 90 to 110° and position the bucket’s round side on the ground. 1. Swing the upperstructure 90°.
Page 104: Towing Machine
DRIVING THE MACHINE Towing Machine In case it is difficult for the machine to evacuate from a soft terrain by own propelling power, attach wire ropes as illustrated to the right. Tow the machine using another Wire Ropes machine. Be sure to attach the wire ropes around the track frames. To prevent the wire ropes from being damaged, place pieces of soft protective material between the wire ropes and the edge corners if the frame.
Page 105: Operating In Water Or Mud
DRIVING THE MACHINE Operating in Water or Mud The machine can be operated in water up to the upper edge of the upper rollers only if worksite footing has sufficient strength to prevent the machine from sinking under the upper edge of the upper roller, and only if the water is flowing slowly. When operating in such conditions, check the machine’s position often. Reposition the machine if necessary. Avoid submerging the swing bearing, swing gears and center joint.
Page 106: Precautions For Traveling On Slopes
DRIVING THE MACHINE Precautions for Traveling on Slopes CAUTION: Avoid possible injury from traveling on slopes. Tipping over or skidding down of the machine may result. Thoroughly read and understand precautions below and be sure to travel at slow speed on slopes.
Page 107: Parking The Machine On Slopes
DRIVING THE MACHINE Parking the Machine on Slopes WARNING: Avoid parking and/or stopping the machine on slopes. The machine may tip over, possibly resulting in personal injury. If parking the machine on a slope is unavoidable:  Thrust the bucket teeth into the ground.  Return the control levers to neutral and pull pilot control shut-off lever (1) to the LOCK position.
Page 108 DRIVING THE MACHINE MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Page 109: Operating The Machine
OPERATING THE MACHINE Control Lever (ISO Pattern) WARNING:  Never place any part of body beyond window frame. It could be crushed by the boom if boom control lever is accidentally bumped or otherwise engaged. Never remove the window sash bar. ...
Page 110: Boom-Swing Pedal
OPERATING THE MACHINE Boom-Swing Pedal Use the boom swing function to efficiently operate the machine when excavating grooves along roadsides or near walls. The boom swing operation is performed using boom-swing pedal (1) located at the operator’s right foot as illustrated to the right. Boom-Swing Operation 1. Turn cover (2) for boom-swing pedal (1) forward. 2. Step on the left side of boom-swing pedal (1) to swing left. Step on the right side of pedal (1) to swing right. 3. Turn cover (2) backward over boom-swing pedal (1) when boom-swing operation is no longer required. MABA-05-002 Unlock Position MABA-05-003 Lock Position...
Page 111: Blade Lever
OPERATING THE MACHINE Blade Lever Use blade lever (1) on the operator’s right to raise and lower the blade. When blade lever (1) is released, it automatically returns to neutral, holding the blade in the present position until lever (1) is operated again. MABA-05-001 2- Blade Raise 3- Blade Lower MABA-04-002...
Page 112: Precautions For Blade Operation
OPERATING THE MACHINE Precautions for Blade Operation This blade is designed as a light service attachment of the hydraulic excavator. Please keep the following points in mind:  This blade is designed for bull dozing work only. Do not attempt to dig deeply with the blade. Doing so may damage not only the blade but the undercarriage as well.  Do not apply concentrated or uneven loads to the blade. Never allow the blade to forcefully collide with a load by running the machine into the load.
Page 113: Side Frame Extend / Retract Lever (Zx17U-5A Only)
OPERATING THE MACHINE Side Frame Extend / Retract Lever (ZX17U-5A only) To adjust the side frame width, operate side frame extend / retract lever (1) as illustrated to the right. WARNING: Operate the machine with the side frames fully extended (1280 mm) or retracted (980 mm). If the machine is operated with the side frames extended insufficiently, the extended side frames are not securely held, causing the upper structure to keep moving and constituting a safety hazard.
Page 114 OPERATING THE MACHINE Extending / Retracting Blade Width (ZX17U-5A only) Change the blade width in accordance with the side frame extension / retraction. When working with the blade contact to ground, there are some cases that it is difficult to remove the pins. Work after raising the blade, and stopping the engine. When extending the blade width: 1. Remove blade pin (5). 2. Turn over the extension blade (4) and align the pin hole. 3. Install blade pin (5). 4. Extend the left side following steps 1 to 3 above.
Page 115: Pilot Control Shut-Off Lever
OPERATING THE MACHINE Pilot Control Shut-Off Lever Pilot control shut-off lever (1) functions to prevent misoperation of the machine from occurring if the control levers are accidentally moved when leaving the operator's seat or when entering the cab. Pilot control shut-off lever (1) is linked to console (2) latch mechanism so that console (2) is raised in the LOCK position to aid in entering and exiting the operator’s station and for maintenance. WARNING:  To deactivate control lever (3) and pedal functions, be sure to pull pilot control shut-off lever (1) and raise console (2) to the fully locked position.
Page 116 OPERATING THE MACHINE Before Starting Operation: Confirm that pilot control shut-off lever (1) is pulled up to the LOCK position before starting the engine. Slowly push down control shut-off lever (1) to UNLOCK position before starting operation. Confirm that all control levers and pedals are in neutral and that no part of the machine is in motion. WARNING: If any part of the machine (any actuator) moves when pilot control shut-off lever (1) is lowered to the UNLOCK position despite the fact that all controls are placed in neutral, the machine is...
Page 117: Warming Up Operation
OPERATING THE MACHINE Warming Up Operation The normal operating temperature of hydraulic oil is between 50 and 80 °C (122 and 176 °F). Hydraulic components may be seriously damaged if the machine is operated when the hydraulic oil temperature is below 20 °C (68 °F). Before starting work, be sure to follow these warm-up procedures until the temperature of the hydraulic oil reaches above 20 °C (68 °F). Warm-Up Procedures: 1.
Page 118: Operating Backhoe
OPERATING THE MACHINE Operating Backhoe  Use the appropriate arm and bucket for the work. (Refer to the "Bucket Types and Applications" in the Specifications section.)  Pull the bucket toward the machine using the arm as the main digging force.  When soil sticks to the bucket, remove it by moving the arm and/or bucket rapidly back and forth.  Place the bucket teeth on the ground with the bottom of the bucket at a 45 degree angle to the ground.  When trenching a straight line, position the tracks parallel M107-05-037 to the trench. After digging to the desired depth, move the machine as required to continue the trench.  When operating the arm, avoid bottoming the cylinder to prevent cylinder damage.
Page 119: Grading Operation
OPERATING THE MACHINE Grading Operation Use the blade for soil refilling and general grading operations after excavation. Grading operation can be also performed by operating the boom, arm, and bucket simultaneously. IMPORTANT: Do not pull or push dirt with the bucket when traveling. Excess force will be applied on each part, and the machine may be damaged. When grading by operating the boom, arm, and bucket simultaneously: 1. When grading from the forward to the backward, slowly...
Page 120: Avoid Abusive Operation
OPERATING THE MACHINE Avoid Abusive Operation Do not travel while thrusting the bucket teeth into the ground and do not raise the rear of the machine to use the machine's weight as additional digging force. Severe machine damage may result. MZX5-05-002 Avoid Excavation Using Upperstructure and/or Boom Swing Power Never attempt to move rocks or excavate a cliff face by hitting the bucket using upperstructure and/or boom swing power. Damage to the front attachment, or shortening of the service life of the swing systems may result. 5-12...
Page 121: Avoid Driving Bucket Teeth Into Ground
OPERATING THE MACHINE Avoid Driving Bucket Teeth into Ground WARNING: If the bucket teeth are forcedly driven into the ground, crushed material may spatter, possibly resulting in injury of the operator and/or co-workers around the machine. Furthermore, the service lifetime of all front attachment parts may be shortened.
Page 122: Boom Cylinder May Hit Blade
OPERATING THE MACHINE Boom Cylinder may Hit Blade When digging deeply with the blade positioned at the front, the boom cylinder or bucket may accidentally hit the blade, causing damage. Take care to prevent this from happening. MZX5-13-014 MZX5-13-015 5-14...
Page 123: Avoid Hitting Blade With Bucket
OPERATING THE MACHINE Avoid Hitting Blade With Bucket When rolling in the arm in a travel or transportation position, be careful not to hit the blade with the bucket. MZX5-13-015 Avoid Colliding Blade Against Rocks Do not attempt to allow the blade to collide with rocks. Premature damage to the blade and the blade cylinders may result. MZX5-13-016 Avoid Colliding Boom Cylinder With Track When digging deeply with the front attachment positioned at an angle, as illustrated, the boom cylinder may accidentally collide with the track, causing damage. Take extra care to prevent this from happening. MZX5-13-018 Precautions for Installing Wide Bucket or Special Type Bucket...
Page 124: Use Correct Track Shoe
OPERATING THE MACHINE Use Correct Track Shoe Never use rubber crawlers or wide track shoes on rough terrain with scattered rocks, gravel or boulders. Failure to do so may cause breakages of rubber crawlers, shoe bending, looseness of shoe bolts, or damage to track parts such as track links, or rollers. (Refer to the table for Shoe Types and Applications in the specification chapter.) Soil may easily become packed into the crawler during travel operation on sandy ground. If the machine is driven without removing the packed soil from the crawlers, the rubber crawlers will be overloaded, possibly resulting in breakage of the crawlers. Avoid causing the crawlers to become packed with soil by removing soil as often as possible. M1M7-05-015 5-16...
Page 125: Using Rubber Crawler
OPERATING THE MACHINE Using Rubber Crawler Rubber crawlers are designed to allow the machine to travel without damaging road surfaces such as paved road surfaces. Avoid damage to the rubber crawlers by following the precautions below: Forbidden Operations 1. Do not operate or steer the machine on or near river- terrace, boulder and boulder mixed ground, crushed- stone ground, uneven hardpan surfaces, stumps, reinforcing bars, scraps, and steel plate edges.
Page 126 OPERATING THE MACHINE 3. Operating the machine with rubber crawlers sagging on uneven surfaces can result in derailment of rubber crawler, possibly causing the rubber crawlers to be damaged. M586-05-024 4. When lowering the machine raised above the ground using the front attachment, slowly lower the machine to Roller the ground. Film 5. The new rubber crawler has a thin rubber film (shown in dotted line) on its roller tread. During operation of a new machine, or immediately after the rubber crawlers are replaced, the rubber film may come off due to contact...
Page 127: Avoid Other Than Specified Machine Operations
OPERATING THE MACHINE Avoid other than Specified Machine Operations This machine has been exclusively designed for excavation and loading works. Do not apply this machine to works other than excavation and loading. Do not operate the machine under any conditions beyond these specifications. CAUTION: Precautions for Lifting Work  Operate the machine on level ground. Operating the machine on a slope may cause the machine to become unstable, possibly resulting in tipping accident.
Page 128: Shackle Bracket Usage
OPERATING THE MACHINE Shackle Bracket Usage A shackle bracket is provided on the track frame to tow light weight objects as specified below. Wire Ropes IMPORTANT: Be sure to conform to the restrictions and precautions stated below when towing a light weight object using the shackle bracket provided on the track frame. The track frame and/or the shackle bracket may be damaged otherwise.
Page 129: Emergency Boom Lowering Procedure
OPERATING THE MACHINE Emergency Boom Lowering Procedure WARNING:  Prevent personal injury. Confirm that no one is under the front attachment before starting the procedure below.  Be sure to work only after oil temperature is low or before operation. Failure to do so may allow high temperature oil to spray, possibly causing severe burns.
Page 130 OPERATING THE MACHINE ZX17U-5A WARNING: Do not pull the boom spool rapidly. Otherwise, the boom may lower rapidly and hydraulic oil may spout out from the control valve. Be sure to pull the boom spool slowly. 1. Remove allen head bolts and boom spool to lower the MABA-05-012 boom. Place a container to receive oil escaping from the Boom Spool...
Page 131 OPERATING THE MACHINE ZX26U-5A Overload Relief Valve in Boom Raise Circuit Releasing Overload Relief Valve • If the front attachment is not loaded WARNING: Loosen overload relief valve slowly. If it is loosened rapidly, the boom may also lower rapidly. Do not loosen it more than 3/4 turns, as the hydraulic oil may spout.
Page 132: Precautions For After Operations
OPERATING THE MACHINE Precautions for After Operations  After finishing the day's operation, drive the machine to a firm, level ground where no possibility of falling stones, ground collapse or floods are present. (Refer to the group for "PARKING THE MACHINE" in the DRIVING THE MACHINE section.)  Fully refill the fuel in the fuel tank.  Clean the machine. M1M7-05-024 5-24...
Page 133: Transporting
TRANSPORTING Transporting by Road When transporting the machine on public roads, be sure to first understand and follow all local regulations.  When transporting the machine using a truck, check the width, height, length and weight of the trailer with the machine loaded. Note that transporting weight and dimensions may vary depending on the type of shoe or front attachments installed.
Page 134: Loading/Unloading On A Truck
TRANSPORTING Loading/Unloading on a Truck Always load and unload the machine on a firm, level surface. WARNING:  Be sure to use a loading dock or a ramp for loading/unloading. Never load or unload the machine onto or off a truck or trailer using the front attachment functions when driving up or down the ramp.
Page 135 TRANSPORTING Loading WARNING:  Always travel the machine slowly. Before descending a slope, always ensure that engine control lever (1) is in the slow idle position, and then reduce the engine speed. Turn the travel mode switch (2) to slow speed for ZX26U-5A. ...
Page 136 TRANSPORTING 1. Load the machine so that the centerline of the machine aligns with the centerline of the trailer flatbed. 2. Drive the machine onto the ramp slowly. 3. Determine a position for the bucket in line with the truck. Adjust the angle of the boom and the arm at 90 to 110 °. MADB-06-001 4. Lower the bucket onto to the deck of the truck before the unit passes over the end of the ramp for support. 5.
Page 137: Fastening Machine For Transporting
TRANSPORTING Fastening Machine for Transporting CAUTION:  Securely fasten the machine to the flatbed with wire ropes.  Fasten the machine using the lightweight object- towing bracket of the truck frame to the truck flatbed with wire ropes. Be careful not to allow the wire rope to come in contact with the track shoe.
Page 138: Unloading
TRANSPORTING Unloading WARNING:  Always travel the machine slowly. Before descending a slope, always ensure that engine control lever (1) is in the slow idle position, and then reduce the engine speed. Turn the travel mode switch (2) to slow speed for ZX26U-5A. ...
Page 139: Lifting Machine
 Use lifting cables and other lifting tools being free from any damage and/or aging, and having sufficient strength.  Consult your nearest Hitachi dealer for correct lifting procedures, and the size and types of lifting cable and tools.  Pull the pilot control shut-off lever to the LOCK position so that the machine does not accidentally move while being lifted.
Page 140 TRANSPORTING 1. Swing the upperstructure so that the blade is positioned at the rear of the counterweight. ZX17U-5A: 3100 mm (122 in) ZX17U-5A: 4710 mm (185 in) ZX26U-5A: 2990 mm (118 in) ZX26U-5A: 4990 mm (196 in) 2. Fully retract the blade cylinder. 3. Fully extend the boom, arm and bucket cylinders, as illustrated to the right. 4. Position the boom straight ahead of the upperstructure. Apply the boom swing pedal lock. 5. Pull the pilot control shut-off lever to the LOCK position. 6. Stop the engine. Remove the key from the key switch. 7. Set a crane in an appropriate position. 8. Attach shackles to the boom and blade hooks. Securely thread wire ropes through the shackles. 9. Slowly lift the machine so that shock loads will not be applied to the machine. Take sufficient care not to lose the balance of the machine.
Page 141: Maintenance
IMPORTANT:  Use only recommended fuel and lubricants.  Be sure to use only genuine Hitachi parts. Failure to do so may result in serious injury or death and/or machine breakdown.  Failure to use recommended fuel, lubricants, and genuine Hitachi parts will result in loss of Hitachi product warranty.
Page 142: Check The Hour Meter Regularly
MAINTENANCE Check the Hour Meter Regularly Refer to the List of Check and Maintenance for information about lubricants, check and adjustment intervals. The maintenance guide table is affixed under the seat. (Refer to 7-5, 7-6) Check and maintenance intervals shown in this manual are those for the machines to be operated under normal conditions. In case the machine is operated under more severe conditions, shorten the intervals.
Page 143: Layout
MAINTENANCE Layout MABA-07-001 Arm Cylinder Control Levers 17- Swing Bearing 25- Link Work Light 10- Air Cleaner 18- Control Valve 26- Tooth Boom 11- Pump 19- Track Adjuster 27- Bucket Cylinder Boom Swing Cylinder 12- Counterweight 20- Front Idler 28- Arm Swing Device 13- Track 21- Blade Cylinder Fuel Tank 14- Travel Device 22- Boom Cylinder Hydraulic Oil Tank 15- Lower Roller 23- Blade...
Page 144: Maintenance Guide Table
MAINTENANCE Maintenance Guide Table The maintenance guide table is affixed under the seat. Lubricate and/or service the parts at the intervals as instructed in the table so that all necessary maintenance can be performed regularly.  Symbol Marks The following marks are used in the maintenance guide table. Grease Hydraulic oil filters (Front Joint Pin, Swing Bearing, Swing (Pilot Filter, Hydraulic Oil Tank Filter, Gear) Suction Filter) Gear Oil Air Cleaner Element (Travel Reduction Device) Coolant Engine Oil (Long-Life Coolant) Engine Oil Filter Fuel Filter Hydraulic Oil...
Page 145 MAINTENANCE  Maintenance Guide Table Lubrication Interval ZX17U-5A (hours) MABC-07-007 Item Page Item Page 1 Engine Oil 7-28 9 Hydraulic Oil Filter (Full Flow) 7-44 2 Coolant (Long-Life Coolant) 7-65 10 Hydraulic Oil Filter (Pilot) 7-46 3 Grease (Swing Bearing) 7-25 11 Engine Oil Filter 7-28 4 Grease (Every 100 hours during first time 7-22 12 Fuel Filter 7-58 operation up to 500 hours) 5 Grease (Swing Internal Gear) 7-26 13 Air Cleaner Element...
Page 146 MAINTENANCE  Maintenance Guide Table Lubrication Interval ZX26U-5A (hours) MABC-07-008 Item Page Item Page 1 Engine Oil 7-28 9 Hydraulic Oil Filter (Full Flow) 7-44 2 Coolant (Long-Life Coolant) 7-65 10 Hydraulic Oil Filter (Pilot) 7-46 3 Grease (Swing Bearing) 7-25 11 Engine Oil Filter 7-28 4 Grease (Every 100 hours during first time 7-22 12 Fuel Filter 7-58 operation up to 500 hours) 5 Grease (Swing Internal Gear) 7-26 13 Air Cleaner Element...
Page 147: Preparations For Inspection And Maintenance
MAINTENANCE Preparations for Inspection and Maintenance Except in special cases, park the machine by following the procedure before servicing the machine. 1. Park the machine on a level surface. 2. Lower the bucket and the blade to the ground. 3. Turn engine control lever to the slow idle position and run the engine for 5 minutes to cool the engine. M1M7-05-024 4. Turn the key switch OFF to stop the engine. Remove the key. 5. Be sure to place pilot control shut-off lever (1) in the LOCK position. 6. After putting a tag for "Under Serving" on the easy-to- see cab door or control lever, begin the work. WARNING: Never attempt to maintain the machine when the engine is running in order to prevent the accident.
Page 148: Access Covers
MAINTENANCE Access Covers Engine Cover ZX17U-5A WARNING:  Do not keep the access covers open when the machine is parked on a slope, or while the wind is blowing hard. The access covers may close accidentally, possibly resulting in personal injury. ...
Page 149 MAINTENANCE Engine Cover ZX26U-5A WARNING:  Do not keep the access covers open when the machine is parked on a slope, or while the wind is blowing hard. The access covers may close accidentally, possibly resulting in personal injury.  When opening or closing the access covers, take extra care not to catch fingers between the base machine and the access covers.
Page 150 MAINTENANCE Tank Cover ZX17U-5A WARNING:  Do not keep the access covers open when the machine is parked on a slope, or while the wind is blowing hard. The access covers may close accidentally, possibly resulting in personal injury.  When opening or closing the access covers, take extra care not to catch fingers between the base machine and the access covers.
Page 151 MAINTENANCE Tank Cover ZX26U-5A WARNING:  Do not keep the access covers open when the machine is parked on a slope, or while the wind is blowing hard. The access covers may close accidentally, possibly resulting in personal injury.  When opening or closing the access covers, take extra care not to catch fingers between the base machine and the access covers.
Page 152 MAINTENANCE Radiator Front Cover ZX17U-5A WARNING:  Do not keep the hood and access covers open when the machine is parked on a slope, or while the wind is blowing hard. The access covers may close accidentally, possibly resulting in personal injury. ...
Page 153 MAINTENANCE Radiator Front Cover ZX26U-5A WARNING:  Do not keep the hood and access covers open when the machine is parked on a slope, or while the wind is blowing hard. The access covers may close accidentally, possibly resulting in personal injury. ...
Page 154: Maintenance Guide
MAINTENANCE Maintenance Guide A. Greasing Interval (Hours) Parts Quantity Page 1000 2000 Bucket and Link Pins 7-22 Front   Joint Pins Swing Post and Others 7-22    or every year 2. Blade Pins (ZX26U-5A) 7-24  or every year 3. Swing Bearing 7-25 4. Swing Internal Gear 7-26 5. Control Lever Universal Joint 7-26 or every year ...
Page 155 MAINTENANCE D. Hydraulic System Interval (Hours) Parts Quantity Page 500 1000 2000 1. Check Hydraulic Oil Level 7-38 2. Drain Hydraulic Oil Tank Sump 7-39 26 L ZX17U-5A (6.9 US gal) 3. Change Hydraulic Oil 7-40   39 L ZX26U-5A (10.3 US gal) 4. Clean Suction Filter Each time when hydraulic oil is changed 7-40 Filter-Paper Element   Replace Full-Flow (Return) 7-44 High Performance Filter Element ...
Page 156 IMPORTANT:  Use soft water as a coolant. Do not use strong acid or alkaline water. Use the coolant with genuine Hitachi Long-Life Coolant (LLC) mixed by 30 to 50 %. If a coolant mixed with less than 30 % of Hitachi Long-Life Coolant is used, service life of the cooling parts may be shortened due to damage by freezing or corrosion of coolant system parts.
Page 157 MAINTENANCE I. Miscellaneous Interval (Hours) Parts Quantity Page 1000 1500 2000 3000 1. Check and Replace Bucket Teeth 7-73 2. Change Bucket As required 7-75 3. Adjust Track Sag (Rubber Crawler) and Check for 7-76 Damage 4. Replace Rubber Crawler As required 7-78 5. Check and Replace Seat Belt Every 3 years 7-81 6. Clean Cab Floor (ZX26U-5A) (Cab equipped As required 7-82 machine) 7.
Page 158: Periodic Replacement Of Parts
MAINTENANCE Periodic Replacement of Parts To ensure safe operation, be sure to conduct periodic inspection of the machine. In addition, the parts listed below, if defective, may pose serious safety/fire hazards. These parts may cause serious safety/fire hazards due to deterioration, wear, or fatigue being attributed to material aging or repeated operation. It is very difficult to gauge the extent of deterioration, fatigue, or weakening of the parts listed below simply by visual inspection alone.
Page 159: Kind Of Oils
JASO DH-1 IMPORTANT:  Hitachi Genuine Engine Oils are specially designed and tested to provide optimum performance for the machine, hence we recommend to use Hitachi Genuine Engine Oils.  If you do not use Hitachi Genuine Engine Oil, use engine oil conforming to JASO DH-1.
Page 160  Hitachi Genuine Gear Oil are specially designed and tested to provide optimum performance for the machine, hence we recommend to use Hitachi Genuine Gear Oil.  If you do not use Hitachi Genuine Gear Oil , use gear oil or engine oil conforming to specifications described above. Otherwise, the machine may suffer damage.
Page 161 MAINTENANCE Recommended Oil Viscosity Air Temperature (degrees Celsius) Where to be Applied Kind of Oil Super Wide DH-1 10W30 Engine Oil Pan Engine Oil Super Wide DH-1 15W40 Travel Device Gear Oil Hitachi Gear Oil GL-4_90 Hydraulic System Hydraulic Oil Super EX46HN (Hydraulic Oil Tank) ASTM Grade No.2-D S15 Fuel Tank Diesel Fuel ASTM Grade No.1-D S15 Lithium Grease Nipple SEP Grease Grease Genuine Hitachi LLC Radiator Coolant (Long-Life Coolant) 7-21...
Page 162: Greasing
MAINTENANCE A. Greasing Front Joint Pins Bucket and Link Pins --- every 100 hours Swing Post and Others --- every 500 hours or every year (every 100 hours during first time operation up to 500 hours) Lubricate all fittings shown in the figure. M1M7-05-024  Bucket  Boom Cylinder Bottom Side...
Page 163 MAINTENANCE  Boom Foot ZX17U-5A MABA-00-001  Arm Cylinder Rod Side, Bucket Cylinder Bottom Side ZX26U-5A MABC-07-005  Boom and Arm Joint Pin, Arm Cylinder Bottom Side M571-07-006 M585-07-046 7-23...
Page 164: Blade Pins (Zx26U-5A)
MAINTENANCE  Swing Cylinder M1M7-07-023  Swing Post MABA-07-014 Blade Pins (ZX26U-5A) --- every 500 hours (first time after 250 hours) or every year  Blade Joint Pins ZX26U-5A MABC-07-004 7-24...
Page 165: Swing Bearing
MAINTENANCE Swing Bearing --- every 250 hours CAUTION: Lubricating both the swing bearing and gear and rotating the upperstructure must be done by one person. Before you lubricate the swing bearing, clear the area of all persons. Lower the bucket to the ground.
Page 166: Swing Internal Gear
MAINTENANCE Swing Internal Gear --- every 500 hours CAUTION: Lubricating both the swing bearing and gear and rotating the upperstructure must be done by one person. Before you lubricate the swing bearing, clear the area of all persons. Lower the bucket to the ground.
Page 167: Engine
MAINTENANCE B. Engine Engine Oil Level --- check daily (Before starting the engine) IMPORTANT: This machine adopts the closed air breather system. An incorrect engine oil level may cause trouble on the engine (The oil level should be between the upper and lower marks on oil level gauge (1)).
Page 168: Change Engine Oil
MAINTENANCE Change Engine Oil --- every 250 hours Replace Engine Oil Filter --- every 250 hours 1. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance. CAUTION: Engine may be hot just after operation. Wait for the engine to cool before starting work. 2. Place 10 liter container under the engine oil pan. M1MS-07-009 Remove oil filler cap (2).
Page 169 MAINTENANCE 7. Remove engine oil filter (4) by turning it counterclockwise with the filter wrench. The oil may spill from engine oil filter (4) bottom bracket at this time. Use an empty container to catch the spilled oil. 8. Clean the filter cartridge contact area on the engine. IMPORTANT:  When filling new oil, take care not to allow foreign matter to enter the engine. ...
Page 170 MAINTENANCE CAUTION: Do not spill oil while adding oil. Wipe off any spilled oil. Spilled oil may cause fires. 12. Fill the engine with recommended oil through the oil filler. Check that oil level is between the minimum and maximum on oil level gauge (1) after 15 minutes. NOTE: Refer to the recommended oil and grease chart on page 7-19 for the brand names of oils.
Page 171: Transmission
MAINTENANCE C. Transmission Travel Reduction Gear Check Oil Level --- every 250 hours 1. Park the machine on a level surface. 2. Rotate the travel motor until the plugs are positioned as illustrated on the right. 3. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance. WARNING: Keep body and face away from the air release plug.
Page 172 MAINTENANCE Change Gear Oil --- every 1000 hours IMPORTANT: Do not use gear oils other than those listed in the "Brand Names of Recommended Oil". 1. Park the machine on a level surface. 2. Rotate the travel motor until the plugs are positioned as illustrated on the right. 3. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance.
Page 173 MAINTENANCE 7. Remove oil level check plug (2). 8. Add oil until oil flows out of oil level check plug (2) hole. Model Oil Quantity ZX17U-5A 0.30 L (0.32 US qt) ZX26U-5A 0.60 L (0.63 US qt) NOTE: Refer to the recommended oil and grease chart on page 7-19 for the brand names of oils. 9. Clean and install air release plug (1) and oil level check plug (2). Model Tightening Torque ZX17U-5A 29 to 39 N·m (3 to 4 kgf·m, 21.5 to 29 lbf·ft) 30 to 40 N·m (3 to 4 kgf·m, 22 ZX26U-5A to 29.5 lbf·ft) M585-07-080...
Page 174: D. Hydraulic System
MAINTENANCE D. Hydraulic System Inspection and Maintenance of Hydraulic Equipment CAUTION: When checking and/or servicing the hydraulic components, pay special attention to the following points. 1. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance. 2. Begin servicing hydraulic components only after components, hydraulic oil and lubricants are completely cooled, and after releasing residual pressure.
Page 175 MAINTENANCE IMPORTANT:  When connecting hydraulic hoses and pipes, take special care to keep seal surfaces free from dirt and to avoid damaging them.  Wash hoses, pipes, and the tank interior with a washing liquid and thoroughly wipe it out before reconnecting them.
Page 176 MAINTENANCE Change Hydraulic Oil and Replace Full-Flow Filter Element Hydraulic breaker operation subjects the hydraulic system to become contaminated faster and to quickly deteriorate the hydraulic oil. Failure to adhere to proper maintenance intervals may result in damage to the base machine and the breaker. In order to extend the service life particularly of the hydraulic pump, change the hydraulic oil and the full-flow filter element at the specified frequency given below. (Refer to the "Hydraulic System" in the "MAINTEMANCE" chapter.) Changing intervals differ depending on the brand. (Refer to the "Hydraulic System") Changing intervals for the high performance element (micro-glass) (ZX26U-5A) (Optional) Breaker Operation...
Page 177 MAINTENANCE Changing intervals for the standard filter paper Breaker Operation 10 % 20 % 30 % 40 % 50 % 60 % 70 % 80 % 90 % 100 % Availability Full-Flow Filter Hydraulic oil: 1000 hours 1000 life time Hydraulic oil: 2000 hours 2000 1310 life time When using filter-paper element...
Page 178: Check Hydraulic Oil Level
MAINTENANCE Check Hydraulic Oil Level ---daily IMPORTANT: If the oil level is not viewed in level gauge (1), immediately refill hydraulic oil up to the appropriate level. Failure to do so may result in a serious failure in the hydraulic system. If the oil level is higher than level gauge (1), remove oil down to the appropriate level using a pump.
Page 179: Drain Hydraulic Oil Tank Sump
MAINTENANCE Drain Hydraulic Oil Tank Sump --- every 250 hours WARNING: Hydraulic oil may be hot and pressurized just after operation. Severe burns may result if skin comes in contact with escaping hydraulic oil. Wait for oil to cool before starting work. 1. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance.
Page 180: Change Hydraulic Oil
MAINTENANCE Change Hydraulic Oil --- every 1000 hours or 2000 hours when using the high performance element (optional) --- every 1500 hours or 3000 hours Clean Suction Filter --- when hydraulic oil is changed IMPORTANT: Changing interval differs according to the brand of hydraulic oil used, kind of filter element or average attachment operating availability.
Page 181 MAINTENANCE ZX17U-5A 5. Remove oil using a suction pump. The hydraulic oil tank capacity up to specified oil level is approximately A. Model ZX17U-5A 26 L (6.9 US gal) 6. Slowly loosen drain plug (3). Allow oil to drain. 7. After draining oil, remove suction filter (6) with cover (2). IMPORTANT: When changing hydraulic oil, take care not to enter foreign matters such as dust, water, or sand into the hydraulic oil tank. 8. Clean the hydraulic oil tank interior and suction filter (6). 9. Install suction filter (6) and cover (2) to the hydraulic oil tank. 10. Clean, install and tighten drain plug (3).
Page 182 MAINTENANCE ZX26U-5A 5. Remove oil using a suction pump. The hydraulic oil tank capacity up to specified oil level is approximately A. Model ZX26U-5A 39 L (10.3 US gal) 6. Slowly loosen drain plug (3). Allow oil to drain. 7. Remove rod assembly (5) from the hydraulic oil tank. IMPORTANT: When changing hydraulic oil, take care not to enter foreign matters such as dust, water, or sand into the hydraulic oil tank. 8. Clean the suction filter and tank interior. If suction filter (6) is to be replaced, install new filter on rod assembly (5) as shown. MABA-07-026 9. Before installing the suction filter, check the dimension of rod assembly (5) shown in figure right. Securely insert...
Page 183 MAINTENANCE Bleed Air from Hydraulic System After changing hydraulic oil, bleed air from the hydraulic system by following the procedure described below. Bleed Air from Pump IMPORTANT: If the engine is started when the pump is not filled with hydraulic oil, damage to the pump may result.
Page 184: Replace Full-Flow (Return) Filter Element
MAINTENANCE Replace Full-Flow (Return) Filter Element --- every 500 hours (first time after 250 hours) When using the high performance element (optional) --- every 1000 hours (first time after 500 hours) IMPORTANT: Changing interval differs according to the brand of hydraulic oil used, kind of filter element or average attachment operating availability.
Page 185 MAINTENANCE 6. Replace O-ring (3) and element (6) with new ones. Be careful not to damage element (6) and O-ring (3). Broken element (6) is unusable. 7. Install element (6), valve (5), spring (4) and O-ring (3) to the hydraulic oil tank. 8. Install cover (2) with bolts (1) (4 used). Tightening Torque: 10 N·m (1 kgf·m, 7.4 lbf·ft) 9. After replacing the filter element, bleed air from the hydraulic system and check the oil level in the hydraulic oil tank. (Refer to the "Bleed Air from Hydraulic System") If the machine is operated with air mixed in the hydraulic circuit, damage to the pump may result. MADB-07-017 10. Replace element (6) at the regular interval to keep hydraulic oil clean and to extend the service life of the...
Page 186: Replace Pilot Oil Filter Element
MAINTENANCE Replace Pilot Oil Filter Element --- every 1000 hours WARNING: Hydraulic oil may be hot and pressurized just after operation. Severe burns may result if skin comes in contact with escaping hydraulic oil. Wait for the oil to cool before starting any maintenance work. 1. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and M1M7-05-024...
Page 187 MAINTENANCE 4. Rotate filter case (6) of pilot filter (4) counterclockwise to remove filter case (6). 5. While rotating filter element (7), pull to remove filter element (7) downward. 6. Replace O-ring (8) with a new one. 7. Clean the filter O-ring (8) contact area on filter head (5). 8. Securely install O-ring (8) in the O-ring groove on filter head (5). 9. Coat the seal on new filter element (7) with clean hydraulic oil. Completely install filter element (7) into filter head (5) while rotating filter element (7) taking care not to damage filter element (7). MABA-07-032 10. Take care not to allow dust and/or water enter filter case (6). 11. Install filter case (6) into filter head (5) while rotating filter case (6) clockwise. Tightening Torque: 25 to 35 N·m (2.5 to 3.5 kgf·m, 18.0 to 26 lbf·ft) 12. After replacing the filter element, bleed air from the hydraulic system and check the oil level in the hydraulic oil tank.
Page 188: Check Hoses And Lines
MAINTENANCE Check Hoses and Lines ---daily --- every 250 hours WARNING:  Hydraulic oil and lubricant leaks can lead to fire that may result in serious injury. Check for missing or loose clamps, kinked hoses, lines or hoses that rub against each other, damaged oil cooler, and loose oil cooler flange bolts, for leaks.
Page 189 MAINTENANCE Interval Check Points Abnormalities Remedies (Hours) Every 250 Hose covers Leak (4) Replace hours Hose ends Leak (5) Replace Hose covers Exposed reinforcement (6) Replace M115-07-146 Hose covers Crack or blister (7) Replace Hose Bend (8), Collapse (9) Replace Hose ends and Deformation or corrosion (10) Replace Fittings M115-07-147 M115-07-148 Lines Interval Check Points Abnormalities...
Page 190 MAINTENANCE Hydraulic Fittings  Metal Face Seal Fittings (Union nut (2): Wrench size 17, 19, 22, 27, 36, 41) Metal face seal fitting is used on smaller diameter joint, which seals pressure oil by metal flare (4) and metal flare seat (3). 1. Inspect flare (4) and flare seat (3). They must be free of M202-07-051 dirt or obvious defects. Metal Body 2. Tighten fitting (1) by hand. 3. Tighten fitting (1) or nut (2) to the torque values shown.
Page 191 MAINTENANCE Quick Coupler 1. Connection Procedure 1.1 While pulling and fully turning socket ring (1) counterclockwise, insert socket ring (1) onto plug (3) until the end face of socket ring (1) comes in contact with plug (3). 1.2 Release socket ring (1). Check that socket ring (1) is M1M7-07-006 slightly moved backward by the spring force and that the coupler is held in position with balls (2). Be sure to check that socket ring (1) has been moved back fully to the right original position. 2. Disconnection Procedure 2.1 While pulling and fully turning socket ring (1) counterclockwise, disconnect the coupler. As no check valve is provided in the coupler, take care that oil may flow out of the coupler when the coupler is disconnected.
Page 192 MAINTENANCE Quick Coupler 1. Connection Procedure Always grasp the coupler by its clamp section. Push the body straight until the dust prevention cover retracts approx. 2 mm. Then, pull the clamp section straight to make sure that the coupler is properly connected and will not be disconnected. Dust Prevention Cover Clamp Section M1LA-07-014 CAUTION: If the coupler is grasped and pushed by the dust prevention cover, or not pushed until the dust prevention cover retracts, incomplete connection of the coupler may result, causing the coupler to Click...
Page 193 MAINTENANCE NOTE: When disconnecting a coupler located in a narrow space that is difficult for your hand to enter, use a screwdriver following the procedures as described below. Using Screwdriver A screwdriver with a tip thickness of less than 1 mm and a tip width of approx. 5 mm is appropriate to this work. M1LA-07-021 (1) Slightly push the hose toward the coupler approx. 2 Adapter Dust Prevention Cover Screwdriver (2) While pushing the hose toward the coupler, insert a screwdriver in the position as illustrated to the right.
Page 194: E. Fuel System
MAINTENANCE E. Fuel System WARNING: Beware of fire. Fuel is flammable. Keep fuel away from fire hazards. IMPORTANT: Always fill the fuel tank with the specified diesel fuel. Failure to do so may cause engine trouble and also make it difficult for the engine to start. Recommended Fuel Use only super high quality or high quality DIESEL FUEL (JIS K-2204) (ASTM 2-D). Kerosene must NOT be used.
Page 195: Check Fuel Level
MAINTENANCE Check Fuel Level --- every 8 hours (daily) CAUTION: Handle fuel carefully. Shut the engine off before fueling. Do not smoke while you fill the fuel tank or work on fuel system. 1. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance. M1NC-01-005 2. Check fuel gauge (1) on the monitor panel and fuel level gauge (3) (only ZX26U-5A). When necessary to add fuel, remove cap (2) and refill fuel.
Page 196: Check Water Separator
MAINTENANCE Check Water Separator Drain water --- daily Water separator (1) is a device designed to separate water from the fuel. There is a float inside the case which buoys when water accumulates. When the float rises to the water draining level, drain water. Drain Procedures 1, 2 1. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance. 2. Place 0.5 liters or larger capacity container under water separator (1) to collect the drained water. MABA-07-049 ZX17U-5A 3. Close fuel cock (3).
Page 197: Drain Fuel Tank Sump
MAINTENANCE Drain Fuel Tank Sump --- as required 1. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance. 2. Remove right access cover (1) by loosening bolts (2). 3. Place a 0.5 liters or larger capacity container under drain valve (3) to collect the drained water. 4. Open drain valve (3) to drain water and/or sediment. ZX17U-5A MABA-07-051 5. After draining water, securely tighten drain valve (3). 6. Install right access cover (1) with bolts (2). MABA-07-052 ZX26U-5A ZX17U-5A MABA-07-053 ZX26U-5A MABA-07-054 7-57...
Page 198: Replace Fuel Filter Element
Replace Fuel Filter Element --- every 500 hours IMPORTANT:  Be sure to use only genuine Hitachi elements for the fuel filter element. Failure to do so may deteriorate the engine performance and/or shorten the engine service life. Please be noted that all engine failures caused by using other manufacturers' elements are excluded from Hitachi Warranty Policy.
Page 199: Check Fuel Hoses
MAINTENANCE Check Fuel Hoses --- daily --- every 250 hours WARNING: Fuel leaks can lead to fires that may result in serious injury.  Escaping combustible fluid can cause fires. Check for kinked hoses, hoses that rub against each other, and any fuel leaks.
Page 200: Air Cleaner
MAINTENANCE F. Air Cleaner Air Cleaner Element Clean --- every 250 hours Replace --- after cleaning 6 times or after one year 1. Stop the engine before servicing element (1). 2. Remove clamps (2) (2 places) on cover (3). 3. Remove element (1). M555-07-023 4. Tap element (1) with the palm of your hand. Never tap element (1) on a hard surface.
Page 201: G. Cooling System
Hitachi Long-Life Coolant (LLC) mixed by 30 to 50 %. If a coolant mixed with less than 30 % of Hitachi Long-Life Coolant is used, service life of the cooling parts may be shortened due to damage by freezing or corrosion of coolant system parts.
Page 202: Check Coolant Level
MAINTENANCE Check Coolant Level --- daily With the engine cold, the coolant level must be between the FULL and LOW marks on coolant reservoir (2). If the coolant level is below the low mark, remove the cap of coolant reservoir (2) and add coolant to coolant reservoir (2). WARNING: Do not loosen cap (1) until the coolant temperature in the radiator becomes cool. Hot steam may spout out, possibly causing severe burns. After the coolant temperature has lowered, slowly loosen cap (1) to release the inside air pressure before removing cap (1).
Page 203 MAINTENANCE Deflection: Depress: About 98N Check and Adjust Fan Belt Tension approx. 7 to 9 mm (10 kgf, 22 lbf) --- every 100 hours (first time after 50 hours) IMPORTANT: Loose fan belt may result in insufficient battery charging, engine overheating, as well as premature belt wear. Belts that are too tight, however, can damage both bearings and belts.
Page 204 MAINTENANCE ZX26U-5A 1. Remove bolts (9) (3 used) located right bottom of the seat to remove cover (10). Remove bolts (11) (4 used) and remove cover (12) to open the checking port. 2. Loosen adjusting bolt (14) and mounting bolt (15) of alternator (13). 3. Adjust belt tension by moving alternator (13) forward or backward. 4. Securely tighten bolts (14) and (15). MABA-07-040 IMPORTANT: When a new belt is installed, be sure to re- adjust the tension after operating the engine for 3 to 5 minutes at slow idle speed to be sure that the new belt is seated correctly.
Page 205: Change Coolant
Loosen the cap slowly. Release all pressure before removing the cap. IMPORTANT: Use soft water as a coolant. Do not use strong acid or alkaline water. Use the coolant with MABA-07-036 ZX17U-5A genuine Hitachi Long-Life Coolant (LLC) mixed by 30 to 50 %. ZX26U-5A MABA-07-013 7-65...
Page 206 MAINTENANCE Procedure: 1. Park the machine following the same procedures as described on page 7-7 for preparation for inspection and maintenance. 2. Remove the under cover for ZX17U-5A. Remove radiator cap (1). Open drain cock (2) on the radiator and the drain cock on the water jacket to allow the coolant to drain completely. Remove impurities such as scale at the same time. 3. Close drain cock (2) and the drain cock on the water jacket. Fill the radiator with soft water containing fewer impurities and a radiator cleaner agent. Run the engine at a speed slightly higher than slow idle to raise the coolant temperature until the first two segments come on.
Page 207: Clean Radiator And Oil Cooler Core
MAINTENANCE Clean Radiator and Oil Cooler Core Outside --- every 500 hours Inside --- when coolant is changed WARNING:  Use reduced compressed air pressure. (Less than 0.2 MPa, 2 kgf/cm ). Clear area of bystanders, guard against flying chips, and wear personal protection equipment including goggles or safety glasses.
Page 208: H. Electrical System
MAINTENANCE H. Electrical System IMPORTANT:  Improper radio communication equipment and associated parts, and/or improper installation of radio communication equipment effects the machine's electronic parts, causing involuntary movement of the machine. Also, improper installation of electrical equipments may cause machine failure and/or a fire on the machine.
Page 209 MAINTENANCE If you spill acid on yourself: 1. Flush your skin with water. 2. Apply baking soda or lime to help neutralize the acid. 3. If splashed in eyes, flush with water for 15 to 30 minutes. Get medical attention immediately. If acid is swallowed: 1.
Page 210 MAINTENANCE Check Electrolyte Level --- every one month 1. Check the electrolyte level at least once a month. 2. Park the machine on level ground and stop the engine. 3. Check Electrolyte Level 3.1 When checking the level from the battery side: Clean around the level check lines with a wet towel. Do not use a dry towel. Static electricity may be developed, causing the battery gas to explode. Check U.L (Upper Level) if the electrolyte level is between U.L (Upper Level) and L.L (Lower Level) L.L (Lower Level). M146-07-109 In case the electrolyte level is lower than the middle Filler Port level between the U.L and L.L, immediately refill distilled water or commercial battery fluid.
Page 211 MAINTENANCE Check Electrolyte Specific Gravity--- every month WARNING: If you spill acid on yourself: 1. Flush your skin with water.  Battery gas can explode. Keep sparks and flames 2. Apply baking soda or lime to help neutralize the away from batteries. acid.
Page 212: Replacing Fuses
MAINTENANCE Replacing Fuses --- as required If any electrical equipment fails to operate, first check the fuses in the fuse box. IMPORTANT: Install fuse with correct amperage rating to prevent electrical system damage from overload. ZX17U-5A START HORN, MONITOR B 10 A OPTION, ALARM 10 A LIGHT ENGINE MONITOR ACC PILOT SHUT OFF, 10 A MONITOR GLOW TRAVEL, ILLUMI. 20 A POWER SOCKET MABA-07-045 ZX26U-5A HORN, MONITOR B,...
Page 213: Miscellaneous
MAINTENANCE I. Miscellaneous Check and Replace Bucket Teeth --- daily Check bucket teeth (1) for wear and looseness. Replace teeth (1) if tooth wear exceeds the designated service limit shown below. mm (in) Limit of Use 128 (5.0) 65 (2.6) M104-07-056 CAUTION:  Guard against injury from flying pieces of metal. Wear hard hat or safety glasses, and safety equipment appropriate to the job.
Page 214 MAINTENANCE 3. Clean shank (6) surface. 4. Install rubber pin lock (4) into shank (6) hole as shown. RIGHT WRONG M104-07-060 5. Position new teeth (1) over shank (6). RIGHT WRONG M104-07-061 6. Drive locking pin (5) fully into the hole as shown. RIGHT WRONG M104-07-062 7-74...
Page 215: Change Bucket
MAINTENANCE Change Bucket --- as required CAUTION: When driving the connecting pins in or out, guard against injury from flying pieces of metal or debris. Wear hard hat or safety glasses, and safety equipment appropriate to the job. Before starting replacing work, keep bystanders clear of the machine. Slowly move the front attachment. When using a signal person, coordinate hand signals before starting.
Page 216: Adjust Track Sag (Rubber Crawler) And Check For Damage
MAINTENANCE Adjust Track Sag (Rubber Crawler) and Check for Damage --- daily Swing the upperstructure 90º and lower the bucket to raise the track off the ground as shown. Rotate the rubber track so that the track joint is positioned at the upper center of the track. Measure distance (A) from the bottom of the lower roller tread to the inner ridge of the rubber track. Each time, be sure to place blocks under the machine frame to support the machine. M1M7-04-006 CAUTION: To prevent accidents, care should be taken to ensure that hands, feet, and any body parts do not become entangled when working around the tracks.
Page 217 MAINTENANCE Loosen the Track (Rubber Crawler) WARNING: The pressure inside the cylinder of the track adjuster is high. Do not loosen valve (1) quickly or loosen it too much as valve (1) may fly out or high- pressure grease in the adjusting cylinder may spout out.
Page 218: Replace Rubber Crawler
MAINTENANCE Replace Rubber Crawler --- as required WARNING:  The pressure inside the cylinder of the track adjuster is high. Do not loosen valve (1) quickly or loosen it too much as valve (1) may fly out or high-pressure grease in the adjusting cylinder may spout out. Slowly loosen valve (1) while keeping body parts and face away from valve (1).
Page 219 MAINTENANCE Installing Rubber Crawler 1. Lower the bucket and blade to raise one track off the Grease Outlet ground, as shown. Place blocks under the machine frame to support the machine. 2. Slowly turn valve (1) to allow grease to escape from the grease outlet. 3. Engage the rubber track with the sprocket and position the other end of the rubber track on the front idler. M1LA-07-036 4. While rotating the sprocket in reverse, apply horizontal force to the rubber track to seat it on the idler. 5. Insert a steel pipe into gaps among lower rollers, track Direction of Rotation frame and rubber track and rotate the rubber track slowly to correctly seat the rubber track on the idler. 6. Confirm that the rubber track is correctly engaged with the sprocket and idler. 7. Adjust track sag. (Refer to "Adjust Track Sag".) 8. After checking that the rubber track is correctly engaged Steel Pipes with the sprocket and idler and the track sag is correctly adjusted, lower the machine to the ground. M503-07-062 Direction of Rotation Steel Pipes...
Page 220 MAINTENANCE Replacing the Track WARNING:  Consult your authorized dealer for replacing the track. Extremely strong force is being applied in the track adjuster. It may potentially result in personal injury or death. Do not allow anyone to stand in front of the front idler.
Page 221: Check And Replace Seat Belt
MAINTENANCE Check and Replace Seat Belt Check --- daily Replace --- every 3 years Prior to operating the machine, thoroughly examine belt (1), buckle (2) and attaching hardware (3). If any item is damaged or materially worn, replace the seat belt or component before operating the machine. We recommend that the seat belt be replaced every three years regardless of its apparent condition. MABA-07-048 7-81...
Page 222: Clean Cab Floor (Zx26U-5A) (Cab Equipped Machine)
MAINTENANCE Clean Cab Floor (ZX26U-5A) (Cab equipped machine) --- as required IMPORTANT: Only the cab floor can be washed with water. Take care not to splash other parts of the cab with water. Do not increase the water pressure speed by squeezing the hose end.
Page 223: Check, Clean And Function Check Of Injection Nozzle
MAINTENANCE Check, Clean and Function Check of Injection Nozzle --- every 1500 hours Consult your authorized dealer for check and repair. Inspect and Adjust Valve Clearance --- every 1000 hours Consult your authorized dealer for check and repair. Check and Adjust Injection Timing --- every 1500 hours Consult your authorized dealer for check and repair. Measure Engine Compression Pressure --- as required Consult your authorized dealer for check and repair.
Page 224: Tightening And Retightening Torque Of Nuts And Bolts
MAINTENANCE Tightening and Retightening Torque of Nuts and Bolts --- every 250 hours (first time after 50 hours) Tighten or retighten nuts and bolts used on this machine in accordance with the torque values shown in the following table. Nuts and bolts should be replaced with those of the same or higher grade.
Page 225 MAINTENANCE ZX17U-5A Torque Descriptions Bolt dia. mm Quantity Wrench size N·m (kgf·m) (lbf·ft) 1. Engine cushion rubber mounting bolts (65) 2. Engine bracket mounting bolts (Front) (36) 3. Hydraulic oil tank mounting bolts (65) 7/16-20UNF (2.5) (18) (22) ORS fittings for hydraulic hoses and 9/16-18UNF Metal Joints (29) piping 3/4-16UNF (6.5) (47) 1-1/16-12UNF (18) (129) 5. Pump mounting bolts (65) 6.
Page 226 MAINTENANCE ZX26U-5A Torque Descriptions Bolt dia. mm Quantity Wrench size N·m (kgf·m) (lbf·ft) 1. Engine cushion rubber mounting bolts (65) 2. Engine bracket mounting bolts (Front) (36) 3. Hydraulic oil tank mounting bolts (65) 7/16-20UNF (2.5) (18) (22) ORS fittings for hydraulic hoses and 9/16-18UNF Metal Joints (29) piping 3/4-16UNF (6.5) (47) 1-1/16-12UNF (18) (129) 5. Pump mounting bolts (65) 6.
Page 227 MAINTENANCE Tightening Torque Chart Hexagon Bolt Dia. Wrench Wrench Size Size M552-07-091 M552-07-090 M157-07-225 Socket Bolt N·m (kgf·m) (lbf·ft) N·m (kgf·m) (lbf·ft) N·m (kgf·m) (lbf·ft) (3.0) (22) (2.0) (15) (1.0) (7.4) (6.5) (48) (5.0) (37) (2.0) (15) (11) (81) (66) (3.5) (26) (18) (135) (14)
Page 228 MAINTENANCE MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................7-88...
Page 229: Maintenance Under Special Environmental Conditions
Track Keep the track clean. Park the machine on a hard surface to prevent the tracks from freezing to the ground. High Altitude Engine Oil Change at 1/2 of normal service interval. Engine Oil Filter Change at 1/2 of normal service interval. (Altitude: 1500 m or higher) When the machine is operated at the altitude 1500 m or higher, the ignition of the engine may deteriorate, possibly resulting in significant decrease in durability or function. If the machine is unavoidably operated under these conditions, consult your authorized Hitachi dealer.
Page 230: Maintenance Under Special Environmental Conditions
MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS MEMO ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Page 231: Storage
STORAGE Storing the Machine In case the machine is to be stored for longer than one month, pay attention to the following points to prepare next operation. Item Remedy Machine Cleaning Wash the machine. Remove soil or other debris adhered to the machine. Lubrication/Greasing Check lubricant's level and contamination. Fill up or change if necessary. Lubricate all grease points. Coat grease to exposed metal surfaces which are subject to rust (i.e. cylinder rods etc.). Battery Remove the batteries and store them in a dry protected place after charging fully. If not removed, disconnect the negative battery cable from the ( ) terminal.
Page 232 STORAGE MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................10-2...
Page 233: Troubleshooting
In case troubleshooting is difficult, or measures marked with * must be taken, consult the nearest Hitachi dealer. Never attempt to adjust, disassemble, or repair the hydraulic and/or electrical/electronic parts/components. IMPORTANT: Never attempt to disassemble or modify the electrical/electronic components. Engine Consult the nearest Hitachi dealer for the engine troubleshooting. Engine Auxiliaries Problem Cause Solution Batteries will not be charged.
Page 234 Faulty engine control system * Repair and adjust Clogged air cleaner Clean or replace the element. Faulty injection pump * Repair and adjust Engine runs irregularly. Faulty fuel system * Repair and adjust Water or air in the fuel system Drain water or bleed air. Faulty engine control system * Repair and adjust * Mark: Consult your authorized Hitachi dealer. 11-2...
Page 235 * Repair or replace Faulty pilot valve * Replace Does not return to neutral. Faulty pilot valve * Replace The lever is tilted in the neutral position Worn joint * Repair or replace due to increase in play. Faulty pilot valve * Replace * Mark: Consult your authorized Hitachi dealer. 11-3...
Page 236 * Repair or replace Loose pipe line joint Retighten Broken O-ring at pipe line joint * Replace Faulty hydraulic pump * Repair or replace Faulty pilot valve * Replace Faulty pilot circuit line * Repair or replace Faulty pilot solenoid valve * Repair or replace * Mark: Consult your authorized Hitachi dealer. 11-4...
Page 237 Faulty pilot circuit line * Repair or replace Low set pressure of main or port relief valve * Adjust and replace (boom, arm and bucket) Hydraulic oil temperature increases. Stained oil cooler Clean Insufficient engine fan belt tension Adjust Oil leak from low pressure hose Loose clamps Retighten * Mark: Consult your authorized Hitachi dealer. 11-5...
Page 238 Faulty counter balance valve * Replace Travel speed does not change. Faulty travel speed switch. * Replace Poor contact in connector * Repair or replace Damaged wire harness * Repair Faulty solenoid valve * Repair or replace Faulty motor * Repair or replace * Mark: Consult your authorized Hitachi dealer. 11-6...
Page 239 Swing is not smooth. Worn swing gear * Repair or replace Damaged swing bearing and bearing balls * Repair or replace Lack of grease Refill Low set pressure of swing relief valve * Adjust and replace * Mark: Consult your authorized Hitachi dealer. Immediately after the control valve, swing motor relief valve and/or the swing motor is replaced, a noise may be emitted and/or operation may not be performed smoothly due to air trapped in the hydraulic line. Slowly continue to operate the machine for approx. 10 minutes to bleed air. After repair work is complete, be sure to check the oil level in the hydraulic oil tank. Refill hydraulic oil as needed. Others The machine may have a noise, excessive vibration, and abnormal smell when any trouble occurs. Always beware of the machine conditions during operation. 11-7...
Page 240 TROUBLESHOOTING MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................11-8...
Page 241: Specifications
SPECIFICATIONS Std. Specification ZX17U-5A MABC-12-001 Model ZX17U-5A Specification 3-Pillars Canopy Type of Front-End Boom Swing Type Attachment Bucket Capacity (Heaped) 0.034 (0.044) Operating Weight kg (lb) 1760 (3880) Base Machine Weight kg (lb) 1330 (2930) 3TNV70 Engine kW/min 10.6/2400 (PS/rpm) (14.4/2400) A: Overall Width mm (ft·in) 990 (3' 3'') B: Overall Height mm (ft·in) 2380 (7' 10'') C: Rear End Swing Radius mm (ft·in) 680 (2' 3") D: Minimum Ground mm (ft·in) 165 (7'') Clearance...
Page 242: Working Ranges
SPECIFICATIONS Working Ranges ZX17U-5A K (Left) K (Right) MABC-12-002 Category ZX17U-5A 3-Pillars Canopy Item Maximum Digging Reach mm (ft·in) 3810 (12' 6") Maximum Digging Depth mm (ft·in) 2190 (7' 2") Maximum Cutting Height mm (ft·in) 3540 (11' 7") Maximum Dumping Height mm (ft·in) 2510 (8' 3") Overall Height mm (ft·in) 2380 (7' 10") Overall Length mm (ft·in) 3500 (11' 6") Minimum Swing Radius mm (ft·in) 1530 (5') Boom Swing Pivot Offset Distance mm (ft·in) 105 (4") Blade Bottom Highest Position mm (ft·in) 285 (11") Blade Bottom Lowest Position mm (ft·in)
Page 243: Bucket Types And Applications Zx17U-5A
SPECIFICATIONS Bucket Types and Applications ZX17U-5A Bucket Width mm Front-End Attachment Bucket Capacity 0.93 m Bucket m³ (yd³) (With side cutter) (Without side cutter) (3' 1") ISO (Heaped) mm (in) mm (in) Hoe Bucket 0.019(0.025) 300 (12") 250 (10")  0.024(0.031) 350 (14") 300 (12")  0.029(0.038) 400 (16") 350 (14")  0.034(0.044) 450 (18") 400 (16")  0.039(0.051) 500 (20") 450 (18")
Page 244: Std. Specification
SPECIFICATIONS Std. Specification ZX26U-5A MABA-12-004 Model ZX26U-5A Specification 4-Pillars Canopy Type of Front-End Boom Swing Type Attachment Bucket Capacity (Heaped) 0.06 (0.078) Operating Weight kg (lb) 2630 (5800) 2720 (6000) Base Machine Weight kg (lb) 1930 (4250) 2020 (4450) 3TNV76 Engine kW/min 14.5/2500 (PS/rpm) (19.7/2500) A: Overall Width mm (ft·in) 1390 (4' 7'') 1420 (4' 8'') B: Overall Height mm (ft·in) 2430 (8') C: Rear End Swing Radius mm (ft·in) 795 (2' 7") 870 (2' 10")
Page 245: Working Ranges
SPECIFICATIONS Working Ranges ZX26U-5A K (Left) K (Right) MABA-12-008 ZX26U-5A Category 4-Pillars Canopy Item 1.30 m Arm 1.30 m Arm Maximum Digging Reach mm (ft·in) 4710 (15' 5") 4710 (15' 5") Maximum Digging Depth mm (ft·in) 2730 (8' 11") 2730 (8' 11") Maximum Cutting Height mm (ft·in) 4450 (14' 7") 4260 (14') Maximum Dumping Height mm (ft·in) 3200 (10' 6") 3030 (9' 11") Overall Height mm (ft·in) 2430 (7' 12") Overall Length mm (ft·in) 4180 (13' 9") 4180 (13' 9") Minimum Swing Radius mm (ft·in) 1940 (6' 4") 2020 (6' 8") Boom Swing Pivot Offset Distance...
Page 246: Bucket Types And Applications Zx26U-5A
SPECIFICATIONS Bucket Types and Applications ZX26U-5A Bucket Width mm Front-End Attachment Bucket Capacity 1.30 m Bucket m³ (yd³) (With side cutter) (Without side cutter) (4' 3") ISO (Heaped) mm (in) mm (in) Hoe Bucket 0.05(0.065) 450 (18") 400 (16")  0.06(0.078) 500 (20") 450 (18")  NOTE:  Symbols in the above table have the following meanings. : General excavating : Light duty excavating ...
Page 247: Noise Level Results
SPECIFICATIONS Noise Level Results (2000/14/EC) (2006/42/EC) LwA: guaranteed sound power level of airborne noise (ISO 6395:1988) LpA: sound pressure level at operator’s station (ISO 6396:2008) Unit: dB(A) Canopy ZX17U-5A − − ZX26U-5A Vibration Level Hands/Arms: T he acceleration to which the operator's hands and arms will be exposed is lower than 2.5 m/s². Entire body: T he acceleration to which the operator's entire body will be exposed is lower than 0.5 m/s². NOTE: The acceleration is measured in accordance with ISO 2631/1; ISO 5349 and SAE J1166. Dozer blade on ground.
Page 248: Lifting Capacities
SPECIFICATIONS Lifting Capacities NOTE:  Lifting capacity of the ZX series does not exceed 75 % of tipping load with the machine on firm, level ground or 87 % of full hydraulic capacity. (ISO 10567)  Net lifting capacities are equal to the values obtained by deducting the ATT mass from the values described in the table below.
Page 249 SPECIFICATIONS ZX26U-5A Z (m) Boom 2.10 m, Counterweight 240 kg Canopy Unit; kg REACH [m] 4.07 1.30 m 3.90 1680 630 3.35 Boom 2.10 m, Counterweight 150 kg Cab Unit; kg REACH [m] 4.07 1.30 m 3.90 X (m) 1680 650 3.35 MABA-12-010 12-9...
Page 250 SPECIFICATIONS MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................12-10...
Page 251: Optional Attachment
Coupler Selecting a breaker or crusher Select a breaker, crusher or quick coupler with the correct size and weight for your machine, considering the stability of the machine, hydraulic oil pressure and flow rate of the breaker, crusher or quick coupler. Consult your authorized Hitachi dealer for correct breaker information. Precautions for Operation Carefully study the operation manuals of the breaker, crusher and quick coupler. To avoid damaging the machine, hydraulic breaker, crusher or quick coupler, follow the precautions given below. Precautions for connecting breaker, crusher or quick...
Page 252: Hydraulic Breaker, Hydraulic Crusher And Quick Coupler
OPTIONAL ATTACHMENT HYDRAULIC BREAKER, HYDRAULIC CRUSHER AND QUICK COUPLER Attachment Allowable Weight Limits of Installed Attachment WARNING:  When an attachment other than the standard bucket is installed on the machine, the machine stability will be different. If a heavy attachment is used, not only will controllability be affected but also machine stability will be reduced, possibly causing safety hazard.
Page 253: Piping For Breaker And Crusher (Optional)
OPTIONAL ATTACHMENT PIPING FOR BREAKER AND CRUSHER Piping for Breaker and Crusher (Optional) Operational procedures for stop valves and selection valve. A: Selection Valve Remove a rubber cap and change the attachment. ZX17U-5A MABA-07-037 MABA-13-006 MABA-13-007 ZX17U-5A ZX26U-5A B, C: Stop Valves Stop Valves B, C Close : When not using attachment or is detached. Open : When using attachment. MABA-00-002 ZX26U-5A Close...
Page 254: Attachment Pedal (Hydraulic Breaker) (Optional)
OPTIONAL ATTACHMENT ATTACHMENT PEDAL (HYDRAULIC BREAKER) Attachment Pedal (Hydraulic Breaker) (Optional) The hydraulic breaker can be operated by using attachment pedal (2) located on the left front of the seat, as illustrated. CAUTION: Do not allow your foot to rest on attachment pedal (2) when the pedal is not in use. 1.
Page 255: Precautions For Breaker Operation
OPTIONAL ATTACHMENT ATTACHMENT PEDAL (HYDRAULIC BREAKER) Precautions for Breaker Operation WARNING: Machine stability is reduced as the breaker is much heavier than the bucket. When using a breaker, the machine is more apt to tip over. Also, flying objects may hit the cab or other part of the machine.
Page 256 Immediately stop the machine operation. Failure to do so may result in serious failure in the hydraulic system Hose jumping including pumps. abnormally Immediately consult your authorized Hitachi dealer. M104-05-058 Do not operate the breaker in water. Doing so will cause rust and seal damage, resulting in damage to the hydraulic system components.
Page 257 OPTIONAL ATTACHMENT ATTACHMENT PEDAL (HYDRAULIC BREAKER) Operate the chisel carefully to avoid hitting the machine. When the arm rolled in with the breaker equipped, the chisel may come in contact with the boom. Watch Out! Take care not to hit the boom with the breaker M1M7-05-023 Do not operate breaker with the arm positioned vertically.
Page 258 OPTIONAL ATTACHMENT ATTACHMENT PEDAL (HYDRAULIC BREAKER) Raising the front part of the undercarriage by pressing down the breaker may cause damage to the front attachment. Do not raise the front part of the undercarriage 150 mm or more by pressing down the breaker. Pressing Raising Down 10 to 15 cm M147-05-016 Do not operate breaker with the boom swing operation Do not operate the breaker for long period of time while swinging the boom.
Page 259: Attachment Pedal (Hydraulic Crusher) (Optional)
OPTIONAL ATTACHMENT ATTACHMENT PEDAL (HYDRAULIC CRUSHER) Attachment Pedal (Hydraulic Crusher) (Optional) The hydraulic crusher can be operated by using attachment pedal (2) located on the left front of the seat, as illustrated. CAUTION: Do not allow your foot to rest on attachment pedal (2) when the pedal is not in use.
Page 260: Precautions For Crusher Operation
OPTIONAL ATTACHMENT ATTACHMENT PEDAL (HYDRAULIC CRUSHER) Precautions for Crusher Operation Prevent machine tipping over and damage to the front attachment. Observe the following precautions for crusher operation. WARNING: Machine stability is reduced as crusher is much heavier than the bucket. When operating with a crusher, the machine is more apt to tip over. Falling or flying objects may hit the cab or other part of the machine.
Page 261 OPTIONAL ATTACHMENT ATTACHMENT PEDAL (HYDRAULIC CRUSHER)  When the arm rolled in with the crusher equipped, the crusher may come in contact with the boom. Watch Out! Take care not to hit the boom with the crusher MZX5-13-010  When operating the crusher up high with the boom fully raised, be careful of falling objects.  When operating the crusher on a floor in a building, first confirm that the floor has sufficient strength to support MZX5-13-011 the load caused by crushing, in addition to the machine weight.
Page 262 OPTIONAL ATTACHMENT ATTACHMENT PEDAL (HYDRAULIC CRUSHER)  Always operate the crusher on a stable, level surface, not on a slope or on crushed scraps.  Do not use the crusher to haul or load crushed scraps.  To prevent the attachment from falling accident, use a platform when replacing or detaching the attachment. ...
Page 263: Numeric Keypad Lock (Optional)
It is recommended to change the password frequently to improve security. If the customer forgets the password, contact your authorized Hitachi dealer.  Keep open flames including burning cigarette away from the numeric keypad. Use soft cloth to wipe the surface of the numeric keypad.
Page 264 OPTIONAL ATTACHMENT NUMERIC KEYPAD LOCK Description of Security Functions This system enables starting the engine only when the input password accords with the one predetermined by the customer. Unlocking  Turn the key switch (1) ON, and when all the numeric keys (2) are lit, input the password. When the buzzer sounds and the unlocking indicator (3) (green LED) is lit, unlocking is done, and the engine can be started. M1M7-01-007 IMPORTANT: Input the password by using numeric keypad (2) within 15 seconds after all numeric keys (2) are lit.
Page 265 OPTIONAL ATTACHMENT NUMERIC KEYPAD LOCK Description of Numeric Keypad 1. Unlocking indicator (3) (green LED) While this indicator (3) is blinking or kept ON, the engine can be started without inputting the password. Indicator (3) will be lit when the 2nd digit is entered at input of password. 2. Locking indicator (6) (red LED) When locked, indicator (6) slowly blinks. Indicator (6) is lit when the 1st and 3rd digits are entered at the input of password. 3. Numeric keys (2) (1 – 9 and 0) M1M7-OP1-01-001 Used for inputting the password and making various other kinds of setting. 4. Key F (4) Used for function setting. 5.
Page 266 OPTIONAL ATTACHMENT NUMERIC KEYPAD LOCK Unlocking 1. Turn key switch (1) ON. Then, all numeric keys (2) are lit. 2. Input the 1st digit of the four-digit password. 3. Similarly, input the 2nd digit. 4. Similarly, input the 3rd digit. 5. Similarly, input the 4th digit. 6. If the input numerals coincide with those of the password, the buzzer sounds twice, and unlocking is done. In this condition, when key switch (1) is turned ON, M1M7-01-007 the engine will start. NOTE: If mis-input the password, the entered numbers can be cancelled by pushing Key C (3). Alternatively, redo from the beginning by turning key switch (1) OFF.
Page 267 OPTIONAL ATTACHMENT NUMERIC KEYPAD LOCK Change Password Cancel the registered password, and set a new password. 1. Turn key switch (1) to the ON position. 2. Unlock the numeric keypad. 3. Push Key F (2) and Key 1 (3) simultaneously for more than 2 seconds. 4. Two indicators (4) and (5) blink simultaneously, and the buzzer sounds. M1M7-01-007 5. Input new 4-digit password. After inputting, two indicators (4) and (5) are lit, and the buzzer sounds twice. 6. Once again, re-enter the new password. (the same password as that in Item 5) When the new password is properly input, two indicators...
Page 268 OPTIONAL ATTACHMENT NUMERIC KEYPAD LOCK Changing Lock Timer Setting The lock timer can be changed in this mode. 1. Turn key switch (1) to ON position. 2. Unlock the numeric keypad. 3. Push Key F (2) and Key 2 (7) simultaneously for more than 2 seconds. 4. Two indicators (4) and (5) blink simultaneously, and the buzzer sounds. M1M7-01-007 5. Push a relevant key to set the lock delay timer. List of lock time assigned to each key as timer Key 1: 15 seconds (Factory default) Key 2: 3 minutes Key 3: 5 minutes Key 4: 10 minutes Key 5:...
Page 269 After that, horn and buzzer will sound to warn the operator every time key switch (1) is turned ON until the correct password is input. System Error Display M1M7-01-007 In case any abnormality occurs on the system, two indicators blink alternately. Consult your authorized Hitachi dealer. Factory Default Setting Factory default setting is shown below. (1) Password 0000 (2) Lock delay timer set time 15 seconds...
Page 270 OPTIONAL ATTACHMENT NUMERIC KEYPAD LOCK MEMO ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Page 271 INDEX Change Hydraulic Oil ..............7-40 Check and Adjust Fan Belt Tension ........7-63 Access Covers ..................7-8 Check and Adjust Injection Timing ........7-83 Adjust the Operator’s Seat ............S-6 Check and Replace Bucket Teeth ..........7-73 Adjust Track Sag (Rubber Crawler) and Check for Check and Replace Seat Belt ............ 7-81 Damage ..................7-76 Check Coolant Level ..............7-62 Adjusting the Seat (Optional) ..........1-15 Check Crankcase Breather ............7-83 Air Cleaner ..................7-60 Check Fuel Hoses ................7-59 Air Cleaner Element ..............
Page 272: Index
INDEX Front Joint Pins ................7-22 Never Undercut a High Bank ............ S-20 Front Window ................1-14 Noise Level Results ..............12-7 Fuel Gauge ..................1-7 Numeric Keypad Lock (Optional) ..........13-13 Fuel Level Indicator .................1-6 Fuel System ..................7-54 OPERATING THE ENGINE ...............3-1 OPERATING THE MACHINE ............5-1 GETTING ON/OFF THE MACHINE ..........1-2 OPERATOR’S STATION ..............1-3 General Precautions for Cab ............S-5 OPTIONAL ATTACHMENT ............13-1 Getting ON/OFF the Machine .............1-2 Object Handling ................
Page 273 INDEX Replace Engine Oil Filter ............7-28 Using Rubber Crawler ..............5-17 Replace Fuel Filter Element............7-58 Replace Full-Flow (Return) Filter Element ......7-44 VISIBILITY MAP ................S-41 Replace Pilot Oil Filter Element ..........7-46 Vibration Level ................12-7 Replace Rubber Crawler ............. 7-78 Replace Rubber Hoses Periodically ........S-31 Replacing Fuses ................7-72 Warming Up in Cold Weather .............5-9 Restriction of Attachment Installation ......... S-13 Warming Up Operation ..............5-9 Room Lamp (ZX26U-5A) (Cab equipped machine) ..
Page 274 INDEX MEMO ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................14-4...
Page 275 Hitachi Construction Machinery. The EC Declaration of Conformity will lose its validity for any modification of the machine without approval. Legal Provisions; Manufacturer; The machine fulfills all relevant provisions of the following Hitachi Construction Machinery Tierra Co., Ltd. directives (and their amendments) 1-2 Sasagaoka, Minakuchi-cho, Koka City, Shiga 528-0061 2014/30/EU EMC Directive Japan 2006/42/EC Machinery Directive 2000/14/EC Outdoor Noise Emissions Directive Hitachi Construction Machinery Co., Ltd.

This manual is also suitable for:

Zaxis 26u-5a

Hitachi Zaxis 17U-5A Operator's Manual

Machine Numbers

Safety

Visibility Map

Safety Signs

Components Name

Getting On/Off the Machine

Operator's Station

Break-In

Operating the Engine

Driving the Machine

Operating the Machine

Transporting

Maintenance

Maintenance under Special Environmental Conditions

Storage

Troubleshooting

Specifications

Optional Attachment

Index

Quick Links

Need help?

Questions and answers

Summary of Contents for Hitachi Zaxis 17U-5A