Page 1 CEAM002000 WA250-3 PARALLEL TOOL CARRIER A75001 SERIAL NUMBERS WA250-3 - and up SEPT 97...
Page 2 PRODUCT PUBLICATIONS INFORMATION VARIOUS PRODUCT PARTS & SERVICE PUBLICATIONS ARE AVAILABLE TO ALL KOMATSU CONSTRUCTION EQUIPMENT OWNERS, INCLUDING OPERATION & MAINTENANCE MANUALS, PARTS BOOKS AND SHOP MANUALS. SPECIAL PUBLICATIONS SUCH AS SERVICE TOOL, AIR CONDITIONING, AND TURBOCHARGER SHOP MANUALS ARE ALSO AVAILABLE AS WELL AS SELECTED OPERATION & MAINTENANCE AND SHOP MANUALS IN FOREIGN LANGUAGES.
Page 3 REQUISITION FOR TECHNICAL SERVICE PUBLICATIONS AND SERVICE FORMS COMPLETE FORM < < Komatsu America International Company AND RETURN TO 440 North Fairway Drive Vernon Hills, IL 60061-8112 U.S.A. Attn: Technical Publications Fax No. (847) 970-4186 Tel No. (847) 970-5887 COMPANY NAME PURCHASE ORDER NO.
Page 4 INTRODUCTION...
Page 5: Introduction
Continuing improvements in the design of this machine can lead to changes in detail, which may not be reflected in this manual. Consult your local distributor or Komatsu America International Company for the latest available information on your machine or for questions regarding information in this manual.
Page 6: Safety Information
Safety precautions are described in SAFETY beginning on page 1-1. Komatsu America International Company cannot predict every circumstance that might involve a potential hazard in operation and maintenance. Therefore the safety message in this manual and on the machine may not include all possible safety precautions.
Page 7: Intended Use
If the machine is used for a purpose that is not listed in this manual, Komatsu America International Company cannot bear any responsibility for safety. All consideration of safety in such operations is the responsibility of the user.
Page 8: Location Of Plates, Table To Enter Serial No. And Distributor
INTRODUCTION 4. LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR 4.1 MACHINE SERIAL NO. PLATE POSITION (A) Position of plate On the center right of the front frame. (B) Position of stamp This is stamped on the center of the front frame on the right hand side of the machine.
Page 9: Table Of Contents
INTRODUCTION 5. CONTENTS INTRODUCTION 1. FORWARD ................0-2 2.
Page 10 INTRODUCTION 11.9 BACKUP ALARM ..............2-26 11.10 FUSE .
Page 11 INTRODUCTION 12.16.2 UNCOUPLING THE ATTACHMENT ..........2-59 12.16.3 ATTACHMENTS REQUIRING HYDRAULIC POWER .
Page 12 INTRODUCTION 16.4 OTHER TROUBLE ..............2-99 16.4.1 ELECTRICAL SYSTEM .
Page 13 INTRODUCTION 24.5.1 CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL ........3-44 24.5.2 CLEAN ELEMENT IN AIR CONDITIONER FRESH AIR FILTER .
Page 14 INTRODUCTION MEMORANDA 0-11...
Page 15 SAFETY WARNING Read and follow all safety precautions. Failure to do so may result in serious injury or death. This safety section also contains precautions for optional equipment and attachments.
Page 16: General Precautions
UNAUTHORIZED MODIFICATION Any modification made without authorization from Komatsu America International Company can create hazards. Before making a modification, consult your local distributor. Komatsu America International Company will not be responsible for any injury or damage caused by any unauthorized modification.
Page 17 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY CLOTHING AND PERSONAL PROTECTIVE ITEMS Avoid loose clothing, jewelry, and loose long hair. They can catch on controls or in moving parts and cause serious injury or death. Also, do not wear oily clothes because they are flammable. Also do not wear oily clothes, because they are flammable.
Page 18 WARNING: For reasons of safety, always follow these safety precautions. SAFETY MOUNTING AND DISMOUNTING NEVER jump on or off the machine. NEVER get on or off a moving machine. When mounting or dismounting, always face the machine and use the handrails and steps. Do not use the machine's controls or hoses as handrails when climbing on or off the machine.
Page 19 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PRECAUTIONS WHEN HANDLING AT HIGH TEMPERATURES Immediately after operations are stopped, the engine coolant, engine oil, and hydraulic oil are at high temperatures, and are still under pressure. Attempting to remove the cap, drain the oil or water, or replace the filters may lead to serious burns.
Page 20 When installing and using an optional attachment, read the instruction manual for the attachment and the information related to attachments in this manual. Do not use attachments that are not authorized by your distributor or Komatsu America International Company. Use of unauthorized attachments could create a safety problem and adversely affect the proper operation and useful life of the machine.
Page 21 Do not make any holes or bring any flame or heat close to the accumulator. Do not weld any boss to the accumulator. The gas must be released before disposing of the accumulator, ask your Komatsu distributor to do this.
Page 22: Precautions During Operation
WARNING: For reasons of safety, always follow these safety precautions. SAFETY 7. PRECAUTIONS DURING OPERATION 7.1 BEFORE STARTING ENGINE (Also see “12.1 WALK AROUND CHECK” on page 2-30) SAFETY AT WORKSITE Before entering the operator's compartment, walk completely around the machine and clear the area of personnel and obstructions.
Page 23 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY IN OPERATOR’S CAB Do not leave tools, spare parts or personal items lying around in the operator's compartment. They may damage, break or jam the control levers or switches. Always put them in their proper place. Keep the cab floor, controls, steps and handrails free of oil, grease, snow, and excess dirt.
Page 24 WARNING: For reasons of safety, always follow these safety precautions. SAFETY WHEN STARTING ENGINE Perform a visual check of the machine before starting the engine. Look for such things as missing protective devices, leaks, improper fluid levels, trash buildup and loose, damaged or missing parts. DO NOT start the engine until any unsafe conditions are corrected.
Page 25: After Starting Engine
WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY 7.2 AFTER STARTING ENGINE CHECKS AFTER STARTING ENGINE Failure to carry out checks properly after starting the engine will lead to delays in discovery of abnormalities, and this may lead to serious injury or damage to the machine.
Page 26 WARNING: For reasons of safety, always follow these safety precautions. SAFETY CHECK WHEN CHANGING DIRECTION To prevent serious injury or death, always do the following before moving the machine or the work equipment. Sound the horn to warn people in the area. Check that there is no one near the machine.
Page 27 This may cause the tires to burst. If a tire bursts, it produces an extremely large destructive force, and this may cause serious injury or accident. If you are going to travel continuously, please consult your Komatsu distributor. 1-13...
Page 28 WARNING: For reasons of safety, always follow these safety precautions. SAFETY TRAVELING ON SLOPES Traveling on hills, banks or slopes that are steep could result in the machine tipping over or slipping. On hills, banks or slopes, carry the attachment closer to the ground. Approximately 20 to 30 cm (8 to 12 in) above the ground.
Page 29 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PRECAUTIONS WHEN TRAVELING Be careful not to approach too close to the edge of cliffs. When making embankments or landfills, or when dropping soil over a cliff, dump one pile, then use the next pile to push the first pile.
Page 30 WARNING: For reasons of safety, always follow these safety precautions. SAFETY DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES Do not let the machine touch any electrical cables Even going close to high-voltage cables can cause an electric shock. Always maintain the safe distance given below between the machine and any electric cable. To prevent accidents, always do as follows.
Page 31 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY ENSURE GOOD VISIBILITY When working in dark places, install working lamps and head lamps, and set up lighting in the work area if necessary. Stop operations if the visibility is poor, such as in mist, snow, or rain, and wait for the weather to improve to a condition that allows the operation to be carried out safely.
Page 32 WARNING: For reasons of safety, always follow these safety precautions. SAFETY WORKING ON LOOSE GROUND Do not operate the machine on soft ground. It is difficult to get the machine out again. Avoid operating your machine too close to the edge of cliffs, overhangs, and deep ditches. If these areas collapse your machine could fall or tip over and result in serious injury or death.
Page 33 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PRECAUTIONS IN COLD AREAS After completing operations, remove all water, snow, or mud stuck to the wiring harness, connector (1), switches, or sensors, and cover these parts. If the water freezes, it will cause malfunctions of the machine when it is next used, and this may lead to unexpected accidents.
Page 34: Transportation
When traveling on public roads, check first with the relevant authorities and follow their instructions. The machine can be divided into parts for transportation, so when transporting the machine, please contact your Komatsu distributor to have the work carried out. 1-20...
Page 35: Battery
WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY 7.4 BATTERY BATTERY HAZARD PREVENTION Battery electrolyte contains sulphuric acid, and batteries generate hydrogen gas, so mistaken handling can lead to serious injury or fire. For this reason, always observe the following precautions. Never bring any lighted cigarette or flame near the battery.
Page 36 WARNING: For reasons of safety, always follow these safety precautions. SAFETY STARTING WITH BOOSTER CABLES If any mistake is made in the method of connecting the booster cables, it may cause a fire, so always do as follows. Carry out the starting operation with two workers (with one worker sitting in the operator's seat) Always wear safety glasses when handling tools or booster cables near the batteries.
Page 37 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY CHARGING BATTERY If the battery is handled incorrectly when it is being charged, there is danger that the battery may explode, so follow the instructions in HANDLING BATTERY and in the instruction manual for the charger, and always observe the following precautions.
Page 38: Towing
If the engine on the problem machine will not start or there is a failure in the brake system, please contact your Komatsu distributor for repairs. It is dangerous to tow a machine on a slope, so choose a place where there is a gradual slope. If there is no place with a gradual slope, carry out work to make the slope as small as possible.
Page 39: Precautions For Maintenance
SAFETY 8. PRECAUTIONS FOR MAINTENANCE 8.1 BEFORE CARRYING OUT MAINTENANCE NOTIFICATION OF FAILURE Carrying out maintenance not described in the Komatsu operation and maintenance manual may lead to unexpected failures. Please contact your Komatsu distributor for repairs. WARNING TAGS If others start the engine or operate the controls while you are performing service or lubrication, you could suffer serious injury or death.
Page 40 WARNING: For reasons of safety, always follow these safety precautions. SAFETY STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE When carrying out inspection and maintenance, park the machine on level ground where there is no danger of failing rocks or landslides, or of flooding if the land is low, then lower the work equipment to the ground and stop the engine.
Page 41 Hoses and other parts of the fuel, hydraulic, and brake system are critical parts for ensuring safety, so they must be replaced periodically. Replacement of safety critical parts requires skill, so please ask your Komatsu distributor to carry out replacement. Replace these components periodically with new ones, regardless of whether or not they appear to be defective.
Page 42 WARNING: For reasons of safety, always follow these safety precautions. SAFETY KEEP WORK PLACE CLEAN AND TIDY Do not leave hammers or other tools lying around in the work place. Wipe up all grease, oil, or other substances that will cause you to slip. Always keep the work place clean and tidy to enable you to carry out operations safely. If the work place is not kept clean and tidy, there is danger that you will trip, slip, or fall over and injure yourself.
Page 43 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PREVENTION OF FIRE There is danger of the fuel and battery gas catching fire during maintenance, so always follow the precautions below when carrying out maintenance. Store fuel, oil, grease, and other flammable materials away from flame.
Page 44: During Maintenance
WARNING: For reasons of safety, always follow these safety precautions. SAFETY 8.2 DURING MAINTENANCE PERSONNEL Only authorized personnel can service and repair the machine. Do not allow unauthorized personnel into the area. If necessary, employ an observer. Extra precaution should be used when grinding, welding, and using a sledge-hammer. ATTACHMENTS Appoint a leader before starting removal or installation operations for attachments.
Page 45 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY DO NOT DROP TOOLS OR PARTS INSIDE MACHINE When opening the inspection window or tank oil filler to carry out inspection, be careful not to drop any nuts, bolts, or tools inside the machine.
Page 46 In particular, if the machine is used when there is any abnormality in the brakes or work equipment systems, it may lead to serious accident. Depending on the type of failure, please contact your Komatsu distributor for repairs. RULES TO FOLLOW WHEN ADDING FUEL OR OIL Fuel, oil, antifreeze, and window washer fluid can be ignited by a flame.
Page 47 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PRECAUTION HIGH PRESSURE OIL Do not forget that the work equipment circuits are always under pressure. Do not add oil, drain oil, or carry out maintenance or inspection before completely releasing the internal pressure.
Page 48 WARNING: For reasons of safety, always follow these safety precautions. SAFETY TIRE MAINTENANCE Disassembly, repair, and assembly of tires requires specialist equipment and skill, please ask your specialist tire repair shop to carry out repairs. CHECKS AFTER INSPECTION AND MAINTENANCE Failure to carry out inspection and maintenance fully, or failure to check the function of various maintenance locations may cause unexpected problems and may even lead to personal injury or damage, so always do as follows.
Page 49: Tires
WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY 8.3 TIRES HANDLING TIRES If tires are not used under the specified conditions, they may overheat and burst or be cut and burst from sharp stones on rough road surfaces. This may lead to serious injury or damage. To maintain safety, always keep the following conditions.
Page 50 WARNING: For reasons of safety, always follow these safety precautions. SAFETY STORING TIRES AFTER REMOVAL As a basic rule, store the tire in a warehouse which unauthorized persons cannot enter. If the tires are stored outside, always erect a fence around the tires and put up a "No Entry" and other warning signs that even children can understand.
Page 51: Position For Attaching Safety Labels
WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY 9. POSITION FOR ATTACHING SAFETY LABELS Always keep these labels clean. If they are lost or damaged, attach them again or replace them with a new label. There are other labels in addition to the safety labels listed as follows, so handle them in the same way.
Page 52 WARNING: For reasons of safety, always follow these safety precautions. SAFETY 1. Precautions before starting. 3. Precautions when traveling in reverse 2. Precautions for safety lock lever. 4. Precautions for brake. 1-38...
Page 53 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY 5. Do not use ether. 7. Precautions for safety bar. 6. Do not enter. 8. Precautions when coolant is at high temperature. 1-39...
Page 54 WARNING: For reasons of safety, always follow these safety precautions. SAFETY 9. Precautions when oil is at high temperature. 13. Warning to never use without coupler locked. 10. Precautions for brake oil. Order 417-93-21360 for safety labels (1 - 5) 11.
Page 55 OPERATION...
Page 56: General View
OPERATION 10. GENERAL VIEW 10.1 GENERAL VIEW OF MACHINE If directions are indicated in this manual, they refer to the directions shown by the arrows in the diagram below.
Page 57: General View Of Controls And Gauges
OPERATION 10.2 GENERAL VIEW OF CONTROLS AND GAUGES...
Page 58: Explanation Of Components
OPERATION 11. EXPLANATION OF COMPONENTS The following is an explanation of the devices needed for operating the machine. To carry out suitable operations correctly and safely, it is important to understand fully the methods of operating the equipment and the meanings of the displays. 11.1 METER, LAMPS The machine monitor system consists of the main monitor (in front of the operator's seat) and the maintenance monitor (on the right side of the operator's seat).
Page 59: Meter Display Portion
OPERATION METER DISPLAY PORTION (A, C, D) (11.1.2) These consists of meters (speedometer, fuel gauge, engine water temperature gauge, torque converter oil temperature gauge, service meter, transmission shift indicator) and the pilot lamps (turn signal indicator, head lamp Hi beam, preheating, front working lamp, rear working lamp, transmission cut-off, parking brake). OPTION DISPLAY PORTION (F) This consists of the monitor lamps and switches for the emergency steering system, auto-greasing system, and E.C.S.S..
Page 60 OPERATION 11.1.1 WARNING DISPLAYS CENTRAL CHECK LAMP (CHECK) WARNING If this monitor flashes, carry out inspection and maintenance of the appropriate location as soon as possible. If any abnormality is found in the CHECK items before starting the engine (engine oil level, engine water level), the monitor lamp for abnormal location will flash and the central CHECK lamp will also flash.
Page 61 OPERATION If there is any abnormality in the battery charging system when the engine is running, the battery charge caution pilot lamp will flash and the central CHECK lamp will also flash at the same time. If the lamps flash, check the charging circuit.
Page 62 OPERATION 4. ENGINE OIL LEVEL CAUTION PILOT LAMP This warns the operator that the level of oil in the engine oil pan has dropped. When carrying out checks before starting: If the oil level in the engine oil pan is low, the caution pilot lamp and central CHECK lamp will flash.
Page 63 OPERATION 6. ENGINE OIL PRESSURE CAUTION PILOT LAMP This warns the operator that the engine lubricating oil pressure has dropped. If it flashes, stop the engine and check. Check before starting: Lights up Engine started: When the engine is started, the lubrication pressure is formed and the lamps goes out.
Page 64 OPERATION 11.1.2 METER DISPLAY PORTION PILOT DISPLAY When the starting switch is ON, the pilot display lights up when the display items are functioning. 1. PARKING BRAKE PILOT LAMP This lamp lights up when the parking brake is applied. 2. PREHEATING PILOT LAMP This informs the operator that the air intake preheater is heated.
Page 65 OPERATION 3. FRONT WORKING LAMP PILOT LAMP This lamp lights up when the front working lamp is switched ON. 4. REAR WORKING LAMP PILOT LAMP This lamp lights up when the rear working lamp is switched ON. 5. TRANSMISSION CUT-OFF PILOT LAMP This lamp lights up when the transmission cut-off switch is turned to ON.
Page 66 OPERATION METERS 8. FUEL GAUGE This gauge indicates the amount of fuel in the fuel tank. E: Tank is EMPTY F: Tank is FULL The lamp should light up in the green range during operation. If it enters the red range during operation, it means that there is less than 44 liters (11.6 US gal, 9.7 UK gal) of fuel left, so check and add fuel.
Page 67 OPERATION 11. SERVICE METER This meter shows the total operation hours of the machine. The service meter advances while the engine is running - even if the machine is not traveling. While the engine is running, the green pilot lamp on the service meter flashes to show the service meter advances.
Page 68: Switches
OPERATION 11.2 SWITCHES 1. STARTING SWITCH This switch is used to start or stop the engine. OFF position The key can be inserted and moved at this position. When the key is turned to this position, the electric circuit is turned off and the engine stops. ON position Electric current flows in the charging, lamp and accessory circuits.
Page 69 OPERATION 2. TRANSMISSION CUT-OFF SWITCH WARNING If the machine is has to be started on a slope, always turn the transmission cut-off switch to OFF and depress the left brake pedal. Then depress the accelerator pedal while releasing the left brake pedal to start the machine off slowly.
Page 70 OPERATION 5. LAMP SWITCH This is used to light up the head lamps, side clearance lamps, tail lamps, and instrument panel lighting. (1) OFF (2) position: Side clearance lamp, tail lamps, and gauge lighting light up (3) position: Head lamps light up in addition to lamps at position REMARKS The lamp switch can be operated regardless of the position of the lever.
Page 71 OPERATION 7. HAZARD LAMP SWITCH WARNING Use the hazard lamps only in emergencies. Using the hazard lamps when traveling will cause problems for other machines. This switch is used in emergencies , such as when the machine breaks down. ON: All turn signal lamps flash. REMARKS When this switch is turned to the ON position, the turn direction indicator lamps and turn indicator pilot lamp flashes, and the display lamp (1) lights...
Page 72 OPERATION 10. REAR WIPER SWITCH (equipped with cab) Turn lever (C) to operate the rear wiper. 11. CIGARETTE LIGHTER (equipped with cab) This is used to light cigarettes. To use, push the lighter in. After a few seconds it will spring back. At that time remove the lighter and light your cigarette.
Page 73 OPERATION 15. ROOM LAMP SWITCH (equipped with cab) This lights up the room lamp. ON position: lights up Position 1: Position 2 Lights up when cab door is opened Position 3: Lights up REMARKS The room lamp lights up even when the main switch is OFF, therefore when leaving the operator's compartment, turn the switch to position 1 or 2.
Page 74: Control Levers, Pedal
OPERATION 11.3 CONTROL LEVERS, PEDAL 1. SPEED CONTROL LEVER This lever controls the travel speed of the machine. This machine has a 4-FORWARD, 4-REVERSE speed transmission. Place the speed control lever into the desired speed range. 1st and 2nd speeds are used for working. 3rd and 4th speeds are used for traveling.
Page 75 OPERATION 2. DIRECTIONAL LEVER This lever is used to change the direction of travel of the machine. The engine can not be started if the directional lever is not at N (neutral). Position (1): Forward Position N: Neutral Position (2): Reverse REMARKS The length of the lever can be adjusted to 3 stages (positions A, B, C).
Page 76 OPERATION 5. WORK EQUIPMENT CONTROL This lever operates the lift arm and the bucket. (1) RAISE ( (2) HOLD ( ) ) The lift arm is kept in the same position. (3) LOWER ( (4) FLOAT ( ) The lift arm moves freely under external force. (A) TILT ( (B) DUMP ( When the work equipment control lever is pulled further from the RAISE...
Page 77 OPERATION NOTICE Never use the parking brake switch to apply the brakes when traveling, except in an emergency. Apply the parking brake only after the machine has stopped. If the parking brake has been used as an emergency brake when traveling at high speed (near the maximum speed), contact your distributor to have the parking brake checked for any abnormality.
Page 78: Steering Column Tilt Lever
OPERATION 11.4 STEERING COLUMN TILT LEVER WARNING Stop the machine before adjusting the angle of the steering wheel This lever allows the steering column to be tilted forward or backward. Pull the lever up and move the steering wheel to the desired position. Then push the lever down to lock the lever in position.
Page 79: Safety Bar
OPERATION 11.6 SAFETY BAR WARNING Always use the safety bar for maintenance or when transporting the machine. Always remove the safety bar during normal travel operations The safety bar is used during maintenance or when transporting the machine. It locks the front and rear frames, and prevents the front and rear frames from pivoting.
Page 80: Backup Alarm
OPERATION 11.9 BACKUP ALARM This sounds an alarm when the directional lever is set to R position. It is used to warn people behind the machine that the machine will be traveling in reverse. 2-26...
Page 81: Fuse
OPERATION 11.10 FUSE NOTICE Before replacing a fuse, be sure to turn OFF the starting switch. The fuse protects the electrical equipment and wiring from burning out. If a fuse becomes corroded, or white powder can be seen, or a fuse is loose in the fuse holder, replace the fuse.
Page 82: Slow Blow Fuse
OPERATION Fuse box II Fuse Name of circuit capacity Front working lamp Rear working lamp Air conditioner (heater) Air conditioner (heater) Wiper, washer Cigarette lighter, radio (Rotating lamp) (auto-greasing) (opt) (opt) (opt), E.C.S.S. 11.11 SLOW BLOW FUSE If the power does not come on when the starting switch is turned ON, the slow-blow fuse could be blown, so check and replace it.
Page 83: Storage Place For This Manual
OPERATION 11.12 STORAGE PLACE FOR THIS MANUAL Store this manual in the pocket behind the operator’s seat, so it is immediately accessible when needed. 11.13 AUXILIARY POWER SOURCE The fuse terminal (1) in the right console box provides an optional power source.
Page 84: Check Before Starting Engine
OPERATION 12. CHECK BEFORE STARTING ENGINE 12.1 WALK AROUND CHECK WARNING C C Leakage of oil or fuel, or accumulation of flammable material around high temperature parts, such as the engine muffler or turbocharger, may cause fire. C C Check carefully, and if any abnormality is found, repair it or contact your distributor for assistance.
Page 85 OPERATION 1. Check for damage, wear, or play in the work equipment, cylinders, linkage and hoses Check that there are no cracks, excessive wear, or play in the work equipment, cylinders, linkage, or hoses. If any abnormality is found, repair it.
Page 86 Check for any loose or damaged bolts. If any loose bolts are found tighten them to 549 ± 59 NCm (56 ± 6 kgm, 405 ± 43 lbf ft) If any bolts are damaged, replace them with genuine Komatsu bolts. 13. Clean cab window Clean the cab window to ensure good visibility when operating the machine.
Page 87: Check Before Starting
OPERATION 12.2 CHECK BEFORE STARTING Always carry out the items in this section before starting the engine each day 12.2.1 CHECK COOLANT LEVEL, ADD COOLANT WARNING Always wait for the engine to cool down before checking the water level, and check using the radiator overflow sub-tank 1.
Page 88: Check Fuel Level, Add Fuel
OPERATION 12.2.3 CHECK FUEL LEVEL, ADD FUEL WARNING When adding fuel, never let the fuel overflow. This could cause a fire, thoroughly clean up any spillage. 1. Turn the engine starting switch to the ON position, then check the fuel level on the fuel gauge (G).
Page 89: Check And Refill Of Oil In Brake Oil Tank
OPERATION 12.2.5 CHECK AND REFILL OF OIL IN BRAKE OIL TANK WARNING Always use engine oil to refill the brake oil tank. Open the door on top of the hood behind the rear cab window, and check that the oil in brake tank (1) is between the MAX and MIN marks on the gauge at the side of the tank.
Page 90: Check Electrical Wiring
OPERATION 12.2.7 CHECK ELECTRICAL WIRING WARNING If fuses are frequently blown or if there are traces of a short circuit in the wiring, locate the cause and carry out repair. Accumulation of all flammable material (dead leaves, twigs, grass, etc.) around the battery may cause fire, so always remove such material.
Page 91: Drain The Water From The Fuel-Water Separator
OPERATION 12.2.8 DRAIN THE WATER FROM THE FUEL-WATER SEPARATOR With the engine shut-off, open the drain valve (1). Turn the valve counterclockwise approximately 1-1/2 to 2 turns until draining occurs. Drain the filter sump of water until clear fuel is visible. Do not over tighten the valve.
Page 92: Check Effect Of Wheel Brakes
OPERATION 12.2.10 CHECK EFFECT OF WHEEL BRAKES Drive the machine at a speed of 20 km/h (12.4 mph) on a dry flat concrete road surface, and check that the stopping distance is less than 5 m (16.4 ft). 12.2.11 CHECK SOUND OF HORN AND BACKUP ALARM 12.2.12 CHECK FLASHING OF LAMPS, CHECK FOR DIRT AND DAMAGE 12.2.13 CHECK ENGINE EXHAUST COLOR AND SOUND 12.2.14 CHECK OPERATIONS OF GAUGES...
Page 93: Adjustment Before Operation
OPERATION 12.3 ADJUSTMENT BEFORE OPERATION 12.3.1 OPERATOR'S SEAT WARNING Park the machine in a safe place and stop the engine when carrying out adjustment of the operator's seat. Adjust the seat before starting operations or when changing operators. Check that you can depress the brake pedal fully with your back against the seat backrest.
Page 94 OPERATION E: Seat height adjustment Move lever (2) up/down, then move seat up or down as desired. Since lever (2) is also used for adjusting seat angle, set the seat to the desired height while adjusting the angle. Adjustment range: 60 mm (2.36 in) F: Adjusting height of headrest Move the headrest up and down to the desired height.
Page 95: Adjust Seat Belt
OPERATION 12.3.2 ADJUST SEAT BELT Always install a seat belt on machines equipped with ROPS. WARNING Before fitting the seat belt, check that there is no abnormality in the mounting bracket and mounting of the belt. If the belt is worn or damaged, replace it.
Page 96: Adjust Rear Veiw Mirrors
OPERATION 12.3.3 ADJUST REAR VIEW MIRRORS Sit in the operator's seat and adjust the rear view mirror so that you can see properly to the rear. 2-42...
Page 97: Operations And Checks Before Starting Engine
OPERATION 12.4 OPERATIONS AND CHECKS BEFORE STARTING ENGINE WARNING C C If the control levers are touched by accident, the work equipment could move suddenly. When leaving the operators compartment, always set the safety lever securely to the LOCK position. C C Before starting the engine, use a damp cloth to wipe off the dust accumulated on the top surface of the battery or on the starting mortar and alternator.
Page 98: Starting Engine
OPERATION 12.5 STARTING ENGINE 12.5.1 NORMAL STARTING PROCEDURES IN COLD AND WARM CONDITIONS WARNING Check that there are no persons or obstacles in the surrounding area, then sound the horn and start the engine. WARNING NEVER use starting fluid (such as ether) to help start the engine. This engine has a preheater in the intake manifold and this combination can cause an explosion.
Page 99: Starting Procedures After Extended Shutdown Or Oil Change
OPERATION 12.5.2 STARTING PROCEDURES AFTER EXTENDED SHUTDOWN OR OIL CHANGE Complete the following steps after each oil change, or after the engine has been shut off for more than 30 days to make sure the engine receives the correct oil flow through the lubricating oil system: Disconnect the electrical wire from the fuel pump solenoid valve.
Page 100: Operations And Checks After Starting Engine
OPERATION 12.6 OPERATIONS AND CHECKS AFTER STARTING ENGINE After starting the engine do not immediately start operations. First carry out the following operations and checks. NOTICE Do not suddenly accelerate the engine before the warming-up operation is completed. Do not run the engine at low idle or high idle continuously for more than 10 minutes.
Page 101: Moving Machine Off
OPERATION 12.7 MOVING MACHINE OFF WARNING When moving the machine off, check that the area around the machine is safe, then sound the horn before starting. Do not allow people near the machine. There is a blind spot behind the machine, so be particularly careful when traveling in reverse.
Page 102 OPERATION 4. Depress right brake pedal (7) and pull parking brake release lever (8) to the FREE position to release the parking brake. Keep right brake pedal (7) depressed. 5. Set speed control lever (9) to the desired position. 6. Set directional control lever (10) to the desired position. 7.
Page 103: Changing Gear Speed
OPERATION 12.8 CHANGING GEAR SPEED WARNING When traveling at high speed, do not change the gear speed suddenly. When shifting gears, use the brake to reduce the travel speed, then shift gears Shift gear as follows. Move speed control lever (1) to the desired position. Only 1st or 2nd speeds are used for digging and loading operations, so actuate speed control lever stopper.
Page 104: Turning
OPERATION 12.10 TURNING WARNING It is dangerous to turn the machine suddenly at high speed, or to turn on steep hills. If the engine quits while the machine is traveling, the steering wheel becomes heavy and hard to turn, so avoid killing the engine.
Page 105: Stopping Machine
OPERATION 12.11 STOPPING MACHINE WARNING Avoid stopping suddenly. Allow ample room when stopping. Do not park the machine on slopes. If the machine has to be parked on a slope, set it facing directly down the slope, then dig the bucket into the ground and put blocks under the tires to prevent the machine from moving.
Page 106: Operation Of Work Equipment (With Bucket)
OPERATION 12.12 OPERATION OF WORK EQUIPMENT (WITH BUCKET TOOL) Work equipment control lever (1) can be used to operate the lift arm and bucket as follows. 12.12.1 LIFT ARM OPERATION (LEVER) (1) RAISE ( (2) HOLD ( ): The lift arm is kept in the same position. (3) LOWER ( (4) FLOAT ( ): The lift arm moves freely under external force.
Page 107: Operation Of Work Equipment (With Fork)
OPERATION 12.13 OPERATION OF WORK EQUIPMENT (WITH FORK TOOL) Work equipment control lever (1) can be used to operate the lift arm and fork as follows. 12.13.1 LIFT ARM OPERATION (LEVER) (1) RAISE ( (2) HOLD ( ): The lift arm is kept in the same position. (3) LOWER ( (4) FLOAT ( ): The lift arm moves freely under external force.
Page 108: Operation Of Work Equipment (With Multi-Purpose Bucket)
OPERATION 12.14 OPERATION OF WORK EQUIPMENT (WITH MULTI- PURPOSE BUCKET TOOL) Work equipment control lever (1) can be used to operate the lift arm and bucket, the auxiliary control lever (2) can be used to operate the clam of the multi-purpose bucket as follows.
Page 109: Auxiliary Operation (Lever)
OPERATION 12.14.3 AUXILIARY OPERATION (LEVER) The multi-purpose bucket control lever (2) located to the right of the bucket/lift arm control (1) control the opening and closing of the clam on the bucket OPEN (A) Push the control lever forward to open the bucket clam. When released, the lever will automatically return to the “HOLD”...
Page 110 OPERATION To set the multi-purpose attachment as a bucket, pull the control lever (2) back until the clam indicator is at the (0) setting on the indicator. To set the multi-purpose attachment as a scraper, pull the control lever (2) back until the clam indicator is at the (1) or (2) setting on the indicator.
Page 111: Operation Of Work Equipment
OPERATION 12.15 OPERATION OF WORK EQUIPMENT (WITH MATERIAL HANDLING ARM) Work equipment control lever (1) can be used to operate the lift arm and fork as follows. 12.15.1 LIFT ARM OPERATION (LEVER) (1) RAISE ( (2) HOLD ( ): The lift arm is kept in the same position. (3) LOWER ( (4) FLOAT ( ): The lift arm moves freely under external force.
Page 112: Hydraulic Quick Coupler
OPERATION 12.16 HYDRAULIC QUICK COUPLER WARNING Ensure that attachments are properly attached prior to operating the machine. Make certain that the coupler pins are fully engaged. To check for full engagement, lower the attachment close to the ground, push the tilt control lever into the dump position until the attachment touches the ground. Then exert some down pressure on the attachment and bach up slowly.
Page 113: Uncoupling The Attachment
OPERATION NOTE: Visually check for engagement of the coupler plungers by lifting coupler into view. 12.16.2 UNCOUPLING FROM THE ATTACHMENT 1. Tilt back the attachment and coupler. Continue to hold the tilt control lever in the full tilt back position while pushing the coupler switch into the “UNLOCK”...
Page 114: Attachments Requiring Hydraulic Power
OPERATION 12.16.3 ATTACHMENTS REQUIRING HYDRAULIC POWER 1. Before connecting or disconnecting any hydraulic lines, ensure that the attachment is resting on the ground. 2. Shut off the engine. 3. Relieve line pressure by moving all the attachment control levers, and then return them to neutral.
Page 115: Work Possible Using Parallel Tool Carrier
OPERATION 12.17 WORK POSSIBLE USING PARALLEL TOOL CARRIER In addition to the following, it is possible to further increase the range of applications by using various attachments. 12.17.1 DIGGING OPERATIONS WITH ROCK PILES WARNING Always set the machine facing directly to the front when carrying out digging or scooping operations. Never carry out these operations with the machine articulated.
Page 116: Digging Operations On Level Ground
OPERATION 5. Check that there is enough material loaded into the bucket, then operate the bucket control lever to tilt the bucket and load the bucket fully. REMARKS: If the bucket edge is moved up and down while pushing in the bucket and digging, the front wheels could raise up and cause the tires to slip.
Page 117: Leveling Operation
OPERATION 12.17.3 LEVELING OPERATION NOTICE: Always operate the machine in reverse when carrying out leveling operations. If it is necessary to carry out leveling operations when traveling forward, do not set the bucket dumping angle to more than 20E E . 1.
Page 118: Loading Operations
OPERATION 12.17.6 LOADING OPERATIONS Select the method of operation which will give the minimum amount of turning and travel and provide the most efficient method for the jobsite. WARNING Always keep the working area flat. Do not turn suddenly or apply the brake suddenly when traveling with a raised load.
Page 119: Multi-Purpose Bucket
OPERATION 12.17.7 MULTI-PURPOSE BUCKET IN SCRAPER POSITION 1. To use the multi-purpose attachment for scraper loading, place the bucket on the ground. Open the clam until the indicator points to (1) or (2) setting on the indicator, depending on the desired depth of the cut. 2.
Page 120 OPERATION DIGGING, CLEARING, AND LEVELING 1. With the clam fully open, the multi-purpose bucket can be used as a bulldozer. Position the bucket as shown for digging. Note: When the ground is hard or frozen and the area must be ripped before it can be worked, rip a relatively small section and work it to grade before enlarging the cut.
Page 121 OPERATION 5. When finishing a non-solid material, position the bucket as shown, and backdrag the loose material. Note: This method is not recommended where abrasive material is common. 6. By placing the multi-purpose bucket in the scraper position and opening the clam slightly, spreading of material can be done on the “run”.
Page 122 OPERATION IMPROPER USE OF THE MULTI-PURPOSE BUCKET Much unnecessary damage can be done to multi-purpose buckets by subjecting them to uses for which they were not designed. The following illustrates some of the ways a multi-purpose bucket should NOT be used DO NOT use roll back force to pull stumps or buried objects from the ground -- it may bend the clam.
Page 123 OPERATION DO NOT clamp objects and use them as battering rams. This may bend the clam and the blade. DO NOT grade in the forward direction with the bucket in dump position. This could cause damage to the tilt cylinders and linkage. DO NOT charge a bank with an object caught between the clam and blade.
Page 124: Pallet Forks
OPERATION 12.17.8 PALLET FORKS GENERAL Terrain, footing conditions, size and type of materials being moved, and maneuvering space determine the speed at which the fork lift can function. When the fork lift is at work, keep the engine speed near full throttle and operate the first or second gears. Use the 3rd or 4th gears for traveling purposes.
Page 125 OPERATION TRANSPORTING WARNING C C Before transporting the load it must first be tilted back against the carriage backrest and then lowered close to the ground. This will prevent the load from accidentally sliding off the forks. C C The angle of tilt back will depend upon the type of load. Too large an angle could cause rearward spillage of the load.
Page 126 OPERATION UNLOADING 1. Upon reaching the unloading area, slowly move the forks and load over the place where the load is to be deposited. Stop the machine and shift the transmission to neutral. 2. Push the lift control lever forward to lower the load. At the same time tilt the load forward to bring the fork carriage into a vertical position.
Page 127: Material Handling Arm
OPERATION 12.17.9 MATERIAL HANDLING ARM 1. Extend or retract the arm to a suitable length for the load to be handled. 2. Remove the two retaining pins to adjust the arms length. 3. Carry the load close to the tractor for improved stability. 4.
Page 128: Precautions For Operation
OPERATION 12.18 PRECAUTIONS FOR OPERATION 12.18.1 PERMISSIBLE WATER DEPTH When working in water or on swampy ground, do not let the water come above the bottom of the axle housing. After finishing the operation, wash and check the lubricating points. 12.18.2 IF WHEEL BRAKE DOES NOT WORK If the machine is not stopped by depressing the brake pedal, use the parking brake to stop the machine.
Page 129: Precautions When Driving Machine
OPERATION 12.18.4 PRECAUTIONS WHEN DRIVING MACHINE When the machine travels at high speed for a long distance, the tires become extremely hot. This causes early wear of the tires, so it should be avoided as far as possible. If the machine must be driven for a long distance, take the following precautions.
Page 130: Adjusting Boom Kickout
OPERATION 12.19 ADJUSTING BOOM KICK-OUT POSITIONER WARNING Stop the machine on flat ground and put blocks in front and behind the wheels. Apply the parking brake. Secure the front and rear frames with safety bar. Never go under the work equipment when the arm is raised. The boom kick out makes it possible to set the bucket or fork so that they automatically stop at the desired lifting height (work equipment higher than horizontal), the bucket positioner makes it possible to set the bucket so that...
Page 131: Adjusting Bucket Positioner
OPERATION 12.19.2 ADJUSTING BUCKET / FORK POSITIONER 1A. While the machine is equipped with the bucket attachment, switch attachment switch on cab console to bucket position to adjust forward proximity switch. 1B. While the machine is equipped with the fork attachment, switch attachment switch on cab console to fork position to adjust the rear proximity switch.
Page 132: Parking Machine
OPERATION 12.20 PARKING MACHINE WARNING Avoid stopping suddenly. Allow ample room when stopping. Do not park the machine on slopes. If the machine has to be parked on a slope, set it facing directly down the slope, then dig the bucket into the ground and put blocks under the tires to prevent the machine from moving.
Page 133: Checks After Completion Of Engine Operation
OPERATION 4. Operate work equipment control lever (5) to lower the attachment to the ground. 5. Lock work equipment control lever (5) with safety lock (6). 12.21 CHECKS AFTER COMPLETION OF ENGINE OPERATION Check the engine water temperature, engine oil pressure, torque converter oil temperature, and fuel level with the meter and lamps.
Page 134: Checks After Stopping Engine
OPERATION 12.23 CHECKS AFTER STOPPING ENGINE 1. Walk around the machine and check the work equipment, body work, and undercarriage, and check for oil and water leaks. If there are any leaks or abnormalities found, carry out repairs. 2. Fill the fuel tank. 3.
Page 135: Handling The Tires
OPERATION 12.25 HANDLING THE TIRES 12.25.1 PRECAUTIONS WHEN HANDLING THE TIRES If the following defects are found in a tire, for safety reason the tire should be replaced with a new one. Bead wire is broken or bent, or the tire is greatly deformed. Wear is excessive and the carcass ply (excluding breaker) is exposed for more than 1/4 of the circumference.
Page 136 OPERATION If the deflection of the tire is excessive, raise the inflation pressure within the limits given in this table to give a suitable deflection (see deflection ratio). Inflation pressure (kg/cm²) Soft Normal road Tire size (pattern) ground When shipped rating (sandy from factory...
Page 137: Transportation
OPERATION 13. TRANSPORTATION When transporting the machine, observe all the related laws and regulations, and always assure safety. 13.1 LOADING, UNLOADING WORK WARNING Make sure the ramp has sufficient with, length and thickness to enable the machine to be safety loaded and unloaded. When loading and unloading the machine, park the trailer on a flat firm roadbed.
Page 138: Precaution For Loading
OPERATION 13.2 PRECAUTION FOR LOADING After loading the machine in the specified position, secure it in place as follows. 1. Lower the work equipment slowly. 2. Apply the safety lock to lock all the control levers securely. 3. Turn the starting switch to the OFF position and stop the engine. Remove the key from the starting switch.
Page 139: The Location Of Decals Referring To Lifting Positions
13.3.1 THE LOCATION OF DECALS REFERRING TO LIFTING POSITIONS 13.3.2 WEIGHT LIST POSITION OF THE VEHICLE FRONT AXLE REAR AXLE CENTER OF GRAVITY WEIGHT WEIGHT WEIGHT (FROM C.L. OF FRONT AXLE) WA250-3 12060 kg 4606 kg 7454 kg 1792 mm 2-85...
Page 140: Lifting Procedure
OPERATION 13.3.3 LIFTING PROCEDURE Lifting is only for vehicles which have decals indicating lifting positions First stop the vehicle on level ground to ensure the vehicle will be lifted horizontally Then proceed with the follow instructions: 1. Start the engine, be sure the vehicle is on level ground, then set the work equipment to the travel position.
Page 141: Cold Weather Operations
OPERATION 14. COLD WEATHER OPERATIONS 14.1 PRECAUTIONS FOR LOW TEMPERATURE If the temperature drops real low, it may becomes difficult to start the engine, and the coolant may freeze, so do as follows. 14.1.1 FUEL AND LUBRICANTS Change to fuel and oil with low viscosity for all components. For details of the specified viscosity, see "20.
Page 142: Battery
OPERATION 14.1.3 BATTERY WARNING To avoid gas explosions, do not bring fire or sparks near the battery. Battery electrolyte is dangerous. If it gets in your eyes or on your skin, wash it off with large amounts of water, and consult your doctor.
Page 143: Precautions After Completion Of Work
OPERATION 14.2 PRECAUTIONS AFTER COMPLETION OF WORK To prevent mud and water in and on the machine from freezing and making it impossible for the machine to move on the following morning, observe the following precautions. Mud and water in and on the machine should be completely removed. Park the machine on hard, dry ground.
Page 144: Long Term Storage
OPERATION 15. LONG TERM STORAGE 15.1 BEFORE STORAGE When putting the machine in storage for a long time, proceed as follows. After every part is washed and dried, house the machine in a dry building. If the machine must be left outdoors, park it on well drained concrete and cover it with canvas, etc.
Page 145: Troubleshooting
OPERATION 16. TROUBLESHOOTING 16.1 WHEN MACHINE RUNS OUT OF FUEL WARNING The engine could start, so check carefully that the area around the engine is safe before cranking the engine If the machine has run out of fuel, add fuel to the fuel tank and to the fuel filters to minimis any air in the system.
Page 146: Towing The Machine
OPERATION 16.2 TOWING THE MACHINE WARNING If the machine is towed in the wrong way, it could lead to serious injury or damage. If there is a failure in the brake lines and the brakes can not be used, be extremely careful when towing. NOTICE: Towing is for moving the machine to a place where inspection and maintenance can be carried out, and not for moving it long...
Page 147 OPERATION The towing machine should normally be of the same class as the machine being towed. Check that the towing machine has ample braking power, weight, and rim pull to allow it to control both machines while on a slope. When towing the machine downhill, use a larger machine for towing to provide ample rim pull and braking power, or connect another machine to the rear of the machine being towed, in order to prevent either...
Page 148: When Engine Can Be Used
OPERATION 16.2.1 WHEN ENGINE CAN BE USED If the transmission and steering wheel can be operated, and the engine is running, it is possible to tow the machine out of the mud or move it for a short distance to the edge of the road. The operator should sit on the machine being towed and operate the steering in the direction that the machine is being towed.
Page 149: If Battery Is Discharged
OPERATION 16.3 IF BATTERY IS DISCHARGED WARNING When checking or handling the battery, stop the engine and turn the starting switch key to the OFF position before starting. Before starting the engine, use a damp cloth to wipe off the dust accumulated on the top surface of the battery.
Page 150: Precautions For Charging Battery
OPERATION 16.3.2 PRECAUTIONS FOR CHARGING BATTERY CHARGING BATTERY WHEN MOUNTED ON MACHINE Before charging, disconnect the cable from the negative (-) terminal of the battery. Otherwise, an unusually high voltage could damage the alternator. While charging the battery, remove all battery plugs for satisfactory ventilation.
Page 151: Starting Engine With Booster Cable
OPERATION 16.3.3 STARTING ENGINE WITH BOOSTER CABLE When starting the engine with a booster cable, do as follows: Precautions when connecting and disconnecting booster cable WARNING When connecting the cables, never contact the positive (+) and negative (-) terminals together. When starting the engine with a booster cable, always wear safety glasses.
Page 152 OPERATION Connecting the booster cables Keep the starting switch at the OFF position. Connect the booster cable as follows, in the order of the numbers marked in the diagram. 1. Make sure that the starting switches of the normal machine and problem machine are both at the OFF position.
Page 153: Other Trouble
OPERATION 16.4 OTHER TROUBLE 16.4.1 ELECTRICAL SYSTEM ( ): Always contact your distributor when dealing with these items. In cases of abnormalities or causes which are not listed below, please contact your distributor for repairs. Problem Main cause Remedy !Defective wiring (! Check, repair loose Lamp does not glow brightly even terminals, disconnections)
Page 154: Chassis
OPERATION 16.4.2 CHASSIS ( ): Always contact your distributor when dealing with these items. In cases of abnormalities or causes which are not listed below, please contact your distributor for repairs. Problem Main causes Remedy TRANSMISSION Engine is running but Parking brake is applied Release parking brake machine does not move...
Page 155 OPERATION CHASSIS continued (16.4.2) Problem Main causes Remedy BRAKE Brake is not applied when Disc has reach wear limit (Replace disc) pedal is depressed Lack of brake oil Add oil to specified level. See "24.5 EVERY 100 HOURS SERVICE" on page 3-44. Air in brake line Bleed air Brake drags or remains...
Page 156 OPERATION CHASSIS continued (16.4.2) Problem Main causes Remedy HYDRAULIC SYSTEM Lack of lifting power for Lack of oil Add oil to specified level. See "24.5 bucket EVERY 100 HOURS SERVICE" on page 3-44. Bucket takes time to raise Clogged hydraulic tank filter Replace filter.
Page 157: Engine
OPERATION 16.4.3 ENGINE ( ): Always contact your distributor when dealing with these items. In cases of abnormalities or causes which are not listed below, please contact your distributor for repairs. Problem Main causes Remedy Engine oil pressure Engine oil pan oil level is low Add oil, see 12.2.3 CHECK OIL LEVEL, caution pilot lamp lights (sucking in air)
Page 158 OPERATION ENGINE continued (16.4.3) Problem Main causes Remedy Exhaust gas occasionally turns Clogged air cleaner element Clean or replace, see 24.2.1 black CLEAN / REPLACE AIR CLEANER ELEMENT page 3-31 Defective nozzle (! Replace nozzle) Defective compression (! See defective compression above) Defective turbocharger (! Clean or replace...
Page 159 MAINTENANCE...
Page 160: Guides To Maintenance
Komatsu genuine replacement parts: Use genuine Komatsu parts specified in the Parts Book as replacement parts. Komatsu genuine oils: Use genuine Komatsu oils and grease. Choose oils and grease with proper viscosities specified for ambient temperature. Always use clean washer fluid: Use automobile window washer fluid and be careful not to let any dirt get into it.
Page 161 MAINTENANCE Check for foreign materials in drained oil and on filter: After oil is changed or filters are replaced, check the oil and filters for metallic particles and foreign materials. If large quantities of metallic particles or foreign materials are found, consult your distributor. Fuel strainer: If your machine is equipped with a fuel strainer, do not remove it while fueling.
Page 162 MAINTENANCE Checking underneath machine: When working in rocky areas, check for damage underneath the machine, wear and damaged bolts and nuts. Precautions when washing machine: Never spray steam or water directly at the radiator. Do not allow water to get on any electrical component Pre-and post-work checks: Before starting work in mud, rain, snow or at seashore, check plugs and valves for tightness.
Page 163: Outlines Of Service
MAINTENANCE 18. OUTLINES OF SERVICE Use genuine Komatsu parts for replacement. When changing or adding oil, do not use a different type of oil. Unless otherwise specified, the oil and coolant used at the time of shipment from the factory are as shown in the table below.
Page 164: Coolant
MAINTENANCE Be extremely careful not to let impurities get in when storing or adding fuel. Always use the fuel specified in the Operation and Maintenance Manual. Fuel may congeal depending on the temperature when it is used (particularly in low temperatures below-15EC (5EF)), so it is necessary to change to a fuel that matches the temperature.
Page 165: Grease
When replacing oil filters, check if any metal particles are stuck to the old filter. If any metal particles are found, please contact your distributor. Do not open packs of spare filters until just before they are to be used. Always use genuine Komatsu filters. FUEL INJECTION PUMP DO NOT ATTEMPT TO ADJUST THE FUEL INJECTION PUMP Unsatisfactory operation of the engine may not be due to the fuel injection pump.
Page 166: Outline Of Electric System
Never remove or disassemble any electric components installed in the machine. Never install any electric components other than those specified by Komatsu. Be careful to keep the electric system free of water when washing the machine or when it rains.
Page 167: Wear Parts List
The wear parts should be changed correctly in order to use the machine economically. For part replacement, genuine Komatsu parts of excellent quality should be used. Use the parts book to write in the current part number.
Page 168: Use Of Fuel, Coolant And Lubricants According To Ambient Temperature
MAINTENANCE 20. USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS Capacity Ambient Temperature Kind of Reservoir 122EF fluid Specified Refill 50EC SAE 30 22 R 19.5 R SAE 10W Engine oil pan 5.8 US gal 5.1 US gal SAE 10W-30...
Page 169: Engine Oil Specifications
MAINTENANCE ASTM: American Society of Testing ans Material SAE: Society of Automotive Engineers API: American petroleum Institute 20.1 ENGINE OIL SPECIFICATIONS Normal operation Oil performance recommendations are as follows: The use of a quality engine lubricating oil combined with appropriate oil and filter change intervals are critical factors in maintaining engine performance and durability.
Page 170 MAINTENANCE WARNING Do not mix gasoline or alcohol with diesel fuel. This mixture can cause an explosion. NOTICE: Due to the precise tolerances of diesel injection systems, it is extremely important that the fuel be kept clean and free of dirt or water. Dirt or water in the system can cause severe damage to both the injection pump and nozzles.
Page 171: Coolant Specifications
MAINTENANCE 20.3 COOLANT SPECIFICATIONS General Selection and maintenance of the engine coolant is important to long engine life. The following information provides recommendations for selecting the engine coolant and maintaining the coolant inhibitors. Heavy duty diesel engines require a balanced coolant mixture of water, antifreeze, and supplemental coolant additives. Supplemental coolant additive recommendations are included in the section entitled "Inhibitors/Conditioners".
Page 172 MAINTENANCE The following table shows the approximate percentage of antifreeze solution required for various temperatures. Percentage of Antifreeze Approximate Freezing Point Specific Gravity at 16EC (60EF) Concentration by Volume 0EC (+32EF) 1.000 -7EC (+20EF) 1.025 -12EC (+10EF) 1.040 -18EC (0EF) 1.053 -23EC (-10EF) 1.062...
Page 173 MAINTENANCE COOLANT TESTING FOR CONDITIONER CONCENTRATION When the cooling system is maintained as recommended, the conditioner concentration should be satisfactory. The DCA4 concentration must not fall below 1.0 unit per 3.8R (1 US gal) or exceed 2 units per 3.8R (1 US gal) of coolant. The only accurate method for testing chemical concentrations in coolant with mixed chemical compounds is a laboratory analysis.
Page 174 MAINTENANCE DCA4 Unit Guide Fleetguard Part No. DCA4 Units DCA4 Coolant Filter WF-2070 WF-2071 WF-2072 WF-2073 WF-2074 WF-2075 WF-2076 WF-2077 DCA4 Liquid DCA60L 4 (1 Pint) DCA80L 1760 (55 US gal) DCA4 Powder DCA95 DCA4 Precharge and Service Filters System Capacity Precharge Filter Service Filter (See NOTE 1)
Page 175 MAINTENANCE To check the DCA4 concentration level, use the Fleetguard coolant test kit, CC2626. Instructions are included with the test kit. DCA4 Unit Concentration Guide Number of Solution A Drops to Coolant Condition Action Required Cause Color Change Extremely under-concentrated - less Initially charge the system to a 0 - 10 Drops than 0.4 DCA4 units per 3.8R (1 US minimum of 1.0 DCA4 unit per 3.8R (1...
Page 176 MAINTENANCE TOOLS The following tools may be purchased from your Komatsu America International Company distributor. Cooling system test kit The Fleetguard® Coolant Test Kit is used to check the concentration of coolant additives in the cooling system. Part Number: CC-2626 1.
Page 177: Standard Tightening Torque For Bolts And Nuts
MAINTENANCE STANDARD TIGHTENING TORQUE FOR BOLTS AND NUTS 21.1 INTRODUCTION OF NECESSARY TOOLS The following tools are needed when carrying out maintenance. Name of tool Part No. Remarks Wrench set 09000-30006 Applicable width across flats (S - S ) 8 mm - 10 mm 12 mm - 14 mm 13 mm - 17 mm 19 mm - 22 mm...
Page 178: Torque List
The torque value is determined by the width across the flats (b)of the nut and bolt. If it is necessary to replace any nut or bolt, always use a genuine Komatsu part of the same size as the part that was replaced.
Page 179 MAINTENANCE Memoranda 3-21...
Page 180: Periodic Replacement Of Safety Critical Parts
MAINTENANCE PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS To ensure safety at all times when operating or driving the machine, the user of the machine must always carry out periodic maintenance. In addition, to further improve safety, the user should also carry out periodic replacement of the parts given in the table.
Page 181 MAINTENANCE SAFETY CRITICAL PARTS Safety critical parts for periodic replacement Qty. Replacement interval Fuel hose (fuel tank - injection pump) Every 2 years or 4000 hours, whichever Fuel hose (fuel tank - strainer) comes first Fuel hose (strainer - feed pump) Fuel spill hose (fuel return) Fuel spill hose cap Steering hose (pump - priority valve)
Page 182 MAINTENANCE 3-24...
Page 183 MAINTENANCE 3-25...
Page 184: Maintenance Schedule Chart
MAINTENANCE MAINTENANCE SCHEDULE CHART 23.1 MAINTENANCE SCHEDULE CHART SERVICE ITEM PAGE INITIAL 250 HOURS SERVICE (only after the first 250 hours) Replace fuel filters 3-30 Replace transmission oil filter element 3-30 Replace hydraulic tank filter element 3-30 WHEN REQUIRED Check, clean or replace air cleaner element 3-31 Check transmission oil level, add oil 3-33...
Page 185 MAINTENANCE SERVICE ITEM PAGE CHECKS BEFORE STARTING (continued) Check effect of parking brake 2-37 Check effect of wheel brakes 2-38 Check sound of horn and backup alarm 2-38 Check flashing of lamps, check for dirt or damage 2-38 Check engine exhaust color and sound 2-38 Check operation of gauges 2-38...
Page 186 MAINTENANCE SERVICE ITEM PAGE EVERY 250 HOURS SERVICE (continued) Lift cylinder pin (4 places) 3-51 Lift arm pivot pin (2 places) 3-51 Steering cylinder pin (4 places) 3-51 EVERY 500 HOURS SERVICE Replace fuel filters 3-52 Replace transmission oil filter element 3-54 3-55 Lubricate the following:...
Page 187 MAINTENANCE SERVICE ITEM PAGE EVERY 2000 HOURS SERVICE (continued) Check alternator 3-68 Check starter motor 3-68 Check vibration damper 3-68 Replace element in air conditioner recirculation air filter and fresh air filter 3-68 Adjust engine valve lash clearance 3-69 3-29...
Page 188: Service Procedures
MAINTENANCE SERVICE PROCEDURES 24.1 INITIAL 250 HOURS SERVICE Carry out the following maintenance only after the first 250 hours. 24.1.1 REPLACE FUEL FILTERS For Information of replacing or maintaining, see the sections on “EVERY 500 HOURS SERVICE” 24.1.2 REPLACE TRANSMISSION OIL FILTER ELEMENT For Information of replacing or maintaining, see the sections on “EVERY 500 HOURS SERVICE”...
Page 189: When Required
MAINTENANCE 24.2 WHEN REQUIRED 24.2.1 CHECK, CLEAN OR REPLACE AIR CLEANER ELEMENT WARNING ! ! Never clean or replace the air cleaner element with the engine running. ! ! When using pressurized air to clean the element wear safety glasses or goggles to protect the eyes. CHECKING Whenever the red piston in the dust indicator (1) appears, clean the air cleaner element.
Page 190 MAINTENANCE 10. After cleaning, reinstall. (Torque to 5.4 ± 0.5 Nm (0.55 ± 0.05 kgm) 11. Press the button of the indicator (1) to return the red piston to its original position. REPLACING INNER ELEMENT 1. First remove the cover and the outer element, and then remove the inner element.
Page 191: Check Transmission Oil Level, Add Oil
MAINTENANCE 24.2.2 CHECK TRANSMISSION OIL LEVEL, ADD OIL WARNING ! ! When checking the oil level, apply the parking brake and lock the front and rear frames with the safety bar and pin. ! ! The oil is at a high temperature after the machine has been operated.
Page 192: Check Axle Oil Level , Add Oil
MAINTENANCE 24.2.3 CHECK AXLE OIL LEVEL , ADD OIL WARNING ! ! When checking the oil level, apply the parking brake and lock the front and rear frames with the safety bar and pin. ! ! The oil is at a high temperature after the machine has been operated.
Page 193: Clean The Axle Case Breather
MAINTENANCE 24.2.4 CLEAN THE AXLE CASE BREATHER WARNING ! ! When cleaning the axle case breathers, apply the parking brake and lock the front and rear frames with the safety bar and pin. There are two breathers to clean, one on the front axle and one on the rear Remove all mud and dirt from around the breather with a brush.
Page 194: Replace The Bolt-On Cutting Edges
MAINTENANCE 24.2.6 REPLACE THE BOLT-ON CUTTING EDGES WARNING It is extremely dangerous if the work equipment moves when performing this procedure. Set the work equipment in a stable position, turn off the engine, then set the safety lock for the work equipment control lever securely to the LOCK position.
Page 195: Replace Bucket Teeth (If Equipped)
MAINTENANCE 24.2.7 REPLACE BUCKET TEETH (IF EQUIPPED) WARNING It is extremely dangerous if the work equipment moves when performing this procedure. Set the work equipment in a stable position, turn off the engine, then set the safety lock for the work equipment control lever securely to the LOCK position.
Page 196: Check Air Conditioner (If Equipped)
MAINTENANCE 24.2.8 CHECK AIR CONDITIONER (IF EQUIPPED) Check twice a year, spring time and autumn. CHECK LEVELS OF REFRIGERANT (GAS) WARNING If the refrigerant used in the system gets into your eyes or on your hands, it could cause loss of sight or frostbite, so NEVER loosen any part of the refrigerant circuit.
Page 197: Check The Air Conditioner Condenser (If Equipped)
MAINTENANCE 24.2.9 CHECK THE AIR CONDITIONER CONDENSER (IF EQUIPPED) WARNING Do not wash the condenser with a steam cleaner. Otherwise, the condenser will get hot and could break down If there is mud or dust on the air conditioner condenser, clean it with water.
Page 198: Adjust Parking Brake
MAINTENANCE 24.2.11 ADJUST PARKING BRAKE the parking brake is a sealed wet type disc brake, so the brake itself does not need adjusting. However, if the travel of the brake pedal increases because of looseness of the control cable mount or elongation of the control cable, adjust as follows.
Page 199: Replace Slow Blow Fuse
MAINTENANCE 24.2.12 REPLACE SLOW BLOW FUSE WARNING Whenever replacing slow blow fuse, be sure to turn OFF the power source by turning OFF the main starting switch. The slow blow fuse must be replaced with one that has the same capacity.
Page 200: Check Before Starting
MAINTENANCE 24.3 CHECK BEFORE STARTING See Section 2 “CHECK BEFORE STARTING ENGINE” aforementioned on page 2-30. 3-42...
Page 201: Every 50 Hours Service
MAINTENANCE 24.4 EVERY 50 HOURS SERVICE 24.4.1 CHECK THE TIRE INFLATION PRESSURE Measure the inflation pressure before operation when the tires are cool. Standard tire inflation pressure: 17.5-25-12pr, L2 tubeless FRONT tire: 294 kPa (3.0 kg/cm², 42.6 psi) REAR tire: 294 kPa (3.0 kg/cm², 42.6 psi) NOTE: The appropriate tire inflation pressure differs according to the type of work, see "12.25 HANDLING THE TIRES"...
Page 202: Every 100 Hours Service
MAINTENANCE 24.5 EVERY 100 HOURS SERVICE Maintenance for every 50 hours should be carried out at the same time. 24.5.1 CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL WARNING ! ! When the oil filler cap is removed, oil may spurt out, so turn OFF the engine and wait for the oil temperature to cool down, then turn the cap slowly to release the internal pressure before removing the cap.
Page 203: Clean Element In Air Conditioner Fresh Air Filter
MAINTENANCE 24.5.2 CLEAN ELEMENT IN AIR CONDITIONER FRESH AIR FILTER WARNING When using compressed air, wear safety glasses and other things required to maintain safety. If the air conditioner has been used, then its air filter element could need cleaning. Before cleaning the elements, turn the air conditioner OFF.
Page 204: Lubricating
MAINTENANCE 24.5.3 LUBRICATING WARNING ! ! Apply the parking brake, and lock the front and rear frames with the safety bar and pin. ! ! set the work equipment in a stable condition, then turn OFF the engine and apply the locks for the work equipment control levers. Use a grease pump tp pump in grease through the grease fittings marked by the arrows in the following diagrams.
Page 205: Every 250 Hours Service
MAINTENANCE 24.6 EVERY 250 HOURS SERVICE Maintenance for every 50 and 100 hours should be carried out at the same time. 24.6.1 CHANGE OIL IN ENGINE OIL PAN AND REPLACE ENGINE OIL FILTER WARNING Before changing the oil, wait, at least 10 minutes for the engine to cool down after running it.
Page 206: Check For Loose Wheel Hub Nuts. Tighten
MAINTENANCE 11. Close the engine hoods. Ú Diluted oil can cause severe damage to the engine. Check the condition of the used oil. Thin, black oil indicates fuel dilution. Milky discoloration indicates coolant dilution. If you notice any excessive metal particles or foreign material then consult your distributor.
Page 207: Check Air Conditioner Compressor Belt Tension, Adjust
MAINTENANCE 24.6.4 CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST 1. Open the engine hood and lock in place. 2. Visually inspect the drive belt. Replace belts that are cracked or frayed. Adjust belts that have a glazed or shiny surface, indicating belt slippage. Correctly installed tension show even pulley and belt wear.
Page 208: Check Battery Electrolyte Level
MAINTENANCE 24.6.5 CHECK BATTERY ELECTROLYTE LEVEL Open the rear grill. Remove caps (1), and check each cell, the electrolyte should be at a specified level (10 to 12 mm (0.40 to 0.47 in) above the plate). If the electrolyte level is low, add distilled water to the specified level. If distill water has been added to any cell of the battery, add distill water also to the other cells.
Page 209: Lubricating
MAINTENANCE 24.6.7 LUBRICATING WARNING ! ! Set the work equipment in a stable condition, then turn OFF the machine and apply the lock for the work equipment control levers. ! ! Apply the parking brake, and lock the front and rear frames with the safety bar and pin.
Page 210: Every 500 Hours Service
MAINTENANCE 24.7 EVERY 500 HOURS SERVICE Maintenance for every 50, 100 and 250 hours should be carried out at the same time. 24.7.1 REPLACE FUEL FILTERS WARNING ! ! Engine is at a high temperature immediately after the machine has been operated.
Page 211 MAINTENANCE 5. Fill the new filters with clean diesel fuel. Then, apply a thin coat of clean engine oil to the seal of the filter. 6. Install the filters on the filter header until the filter seal contacts the seal surface of the filter header and then, turn the filter an additional ½...
Page 212: Replace Transmission Oil Filter Element
MAINTENANCE 24.7.2 REPLACE TRANSMISSION OIL FILTER ELEMENT 1. Set a container under the filter case to catch the oil then remove drain plug (1) at the bottom of the filter case, and drain the oil. After draining the oil, tighten the plug. Torque to: 107.9 ±...
Page 213: Lubricate
MAINTENANCE 24.7.3 LUBRICATE WARNING ! ! Set the work equipment in a stable condition, then turn OFF the machine and apply the lock for the work equipment control levers. ! ! Apply the parking brake, and lock the front and rear frames with the safety bar and pin.
Page 214: Every 1000 Hours Service
MAINTENANCE 24.8 EVERY 1000 HOURS SERVICE Maintenance for every 50, 100, 250 and 500 hours should be carried out at the same time. 24.8.1 CHANGE OIL IN TRANSMISSION CASE, CLEAN STRAINER WARNING ! ! The oil is hot if the machine has just been operated. Wait for the oil to cool down before changing 1.
Page 215: Clean Transmission Case Breather
MAINTENANCE 24.8.2 CLEAN TRANSMISSION CASE BREATHER Remove all mud and dirt from around the breather, then remove the breather and put it into a cleaning fluid to clean. Take care, so as not to let any dust or dirt get inside the transmission case through the port while the breather is removed.
Page 216: Lubricate
MAINTENANCE 24.8.3 LUBRICATE WARNING ! ! Set the work equipment in a stable condition, then turn OFF the machine and apply the lock for the work equipment control levers. ! ! Apply the parking brake, and lock the front and rear frames with the safety bar and pin.
Page 217: Adjust Engine Valve Lash Clearance
MAINTENANCE Rear drive shaft (2 places) 24.8.4 ADJUST ENGINE VALVE LASH CLEARANCE After the first 1000 hours only thereafter every 2000 hour intervals. For detail procedures to adjust valve lash clearance refer to ”EVERY 2000 HOURS SERVICE” see 24.9.10 “ ADJUST ENGINE VALVE LASH CLEARANCE”...
Page 218: Check Fan Belt Tension
MAINTENANCE 24.8.5 CHECK FAN BELT TENSION Measure the belt deflection at the longest span of the belt when pressed with the finger. Maximum deflection: 9.5 - 12.7 mm (3/8 to 1/2 in) NOTE: Cummins belt tension gauge ST-1293 may be used. The required gauge value is 267 to 578 N (60 to 130 lbf).
Page 219: Every 2000 Hours Service
MAINTENANCE 24.9 EVERY 2000 HOURS SERVICE Maintenance for every 50, 100, 250, 500 and 1000 hours should be carried out at the same time. 24.9.1 CHANGE OIL IN HYDRAULIC OIL TANK, REPLACE HYDRAULIC FILTER ELEMENT WARNING ! ! The oil will be hot if the machine was just operated. Wait for the oil to cool down before changing it. ! ! When removing the oil filler cap turn it slowly to release the internal pressure, then remove it carefully.
Page 220 MAINTENANCE 12 Add hydraulic oil through oil filler port (F) to the specified level, then install cap. For details of the oil to use and refill capacity see "20. USE OF FUEL, COOLANT LUBRICANTS ACCORDING AMBIENT TEMPERATURE on page 3-10 13 Check that the hydraulic oil is at the standard level.
Page 221: Replace Hydraulic Tank Breather Element
MAINTENANCE 24.9.2 REPLACE HYDRAULIC TANK BREATHER ELEMENT WARNING ! ! The oil will be hot if the machine was just operated. Wait for the oil to cool down before changing it. ! ! When removing the oil filler cap turn it slowly to release the internal pressure, then remove it carefully.
Page 222: Cooling System, Replace Coolant And Flush The System
MAINTENANCE 24.9.3 COOLING SYSTEM, REPLACE COOLANT AND FLUSH THE SYSTEM WARNING ! ! If the engine was just running, then the coolant could be hot and cause personal injury. Allow the engine to cool before draining water. ! ! Never remove the radiator cap when the engine is at operating temperature. At operating temperature, the coolant is under pressure.
Page 223 MAINTENANCE RADIATOR CAP GENERAL INFORMATION The radiator cap seals the coolant filler opening of the radiator. Positive sealing requires a cap gasket and its contacting surfaces to be in good condition and a properly tightened cap. The radiator cap incorporates a pressure relief valve. The pressure relief valve keeps the pressure of the coolant at approximately 34 to 64 kPa or 0.35 to 0.65 kg/cm²...
Page 224 MAINTENANCE 6. Refill the system with water only. 7. Then run the engine at low idle and open the drain valve (described in step 3.). 8. While the engine is running continue adding water in the top of the radiator, so that you are passing water through the cooling system for about 10 minutes.
Page 225: Change Axle Oil
MAINTENANCE 24.9.4 CHANGE AXLE OIL WARNING The oil is hot if the machine has just been operated. Wait for the oil to cool down before changing it. 1. Set a container to catch the oil under drain plug (P). 2. Remove front and rear oil filler plugs (1), then remove drain plug (P) to drain the oil.
Page 226: Check Brake Disc Wear
MAINTENANCE 24.9.5 CHECK BRAKE DISC WEAR Have your distributor check and repair brake discs. 24.9.6 CHECK ALTERNATOR The brushes and bearings may be worn. Have your distributor inspect and repair. 24.9.7 CHECK STARTER MOTOR The brushes and bearings may be worn. Have your distributor inspect and repair.
Page 227: Adjust Engine Valve Lash Clearance
MAINTENANCE 24.9.10 ADJUST ENGINE VALVE LASH CLEARANCE 15 mm wrench Remove the valve cover ½ inch drive, engine barring cover Locate Top Dead Center (TDC) for Cylinder Number 1 by barring engine slowly while pressing on the engine timing pin. The barring gear inserts into the flywheel housing and engages the flywheel ring gear.
Page 228 MAINTENANCE 14 mm, Flat blade Screwdriver Locate Top Dead Center (TDC) for Cylinder Number 1 Check and adjust the valves as indicated in the illustration (I = intake, E = Exhaust). Tighten the lock nut and measure the valve lash again. Torque Value: 24 Nm [18 ft-lb] Mark the pulley/vibration damper and rotate the crankshaft 360 degrees.
Page 229: Specifications
SPECIFICATIONS...
Page 230 Operating weight (includes 1 operator: 80 kg (176 lb) 12476 kg (27505 lb) with bolt on cutting edge) ENGINE Model Komatsu S6D102E-1 diesel engine Gross power 118 hp Net horsepower @ 2400 RPM 95 kW (127 hp) Max. torque (gross) @ 1600 RPM 468 NCm (47.8 kgm)
Page 231 SPECIFICATIONS...
Page 232 Operating weight (includes 1 operator: 80 kg (176 lb) 12060 kg (26588 lb) with fork attachment) ENGINE Model Komatsu S6D102E-1 diesel engine Gross power 118 hp Net horsepower @ 2400 RPM 95 kW (127 hp) Max. torque (gross) @ 1600 RPM 468 NCm (47.8 kgm)
Page 233 SPECIFICATIONS...
Page 234 Tipping load, 40 degree full turn 8005 lb. 6315 lb. 4002 lb. (3630 kg) (2864 kg) (1815 kg) Operating weight 25344 lb. 26344 lb. 26344 lb. (11947 kg) (11947 kg) (11947 kg) Note: Allied attachments ordered through Komatsu America dealers.
Page 235 SPECIFICATIONS...
Page 236 SPECIFICATIONS Memoranda...
Page 237: Options, Attachments
OPTIONS, ATTACHMENTS...
Page 238: Available Attachments
OPTIONS, ATTACHMENTS AVAILABLE ATTACHMENTS NAME SPECIFICATION, USE JRB General purpose quick coupler bucket Capacity 2.5 cu yd - 3000 lb. cu yd material density JRB General purpose quick coupler bucket Capacity 3.0 cu yd - 2500 lb. cu yd material density Bucket tooth Bolt-on tooth Cutting edge...
Page 239: Selecting Attachments And Tires
OPTIONS, ATTACHMENTS SELECTING ATTACHMENTS AND TIRES Select the most suitable bucket and tires for the type of work and jobsite conditions. GROUND TYPE OF WORK ATTACHMENT TIRE CONDITIONS General ground 20.5-25-12pr (Rock) General purpose condition ! Loading products bucket ! Loading and (With bolt-on edge) Level ground 20.5-25-12pr (Traction)
Page 240: Heater And Air Conditioning (If Equipped)
OPTIONS, ATTACHMENTS HEATER AND AIR CONDITIONING (IF EQUIPPED) 28.1 GENERAL LOCATION AND FUNCTION OF CONTROL PANEL 1. Press the "ON/OFF" square and light (1) and the "TEMPERATURE SETTING" will light up to indicate ON mode, press it again and the light will go out to indicate OFF mode. 2.
Page 241: Cool Box Compartment
OPTIONS, ATTACHMENTS Defroster (6) and down Arrow (3) when pressed simultaneously it will show whether the evaporator thermostat is open (OP) or closed (CL). OP Displayed - Clutch not engaged / coil to cold CL Displayed - Clutch is engaged / coil is at temperature set point, (opening temperature). 7.
Page 242: Handling E.c.s.s. (Electronic Controlled Suspension System) (If Equipped)
OPTIONS, ATTACHMENTS HANDLING E.C.S.S. (ELECTRONIC CONTROLLED SUSPENSION SYSTEM) (IF EQUIPPED) Always read this section before using the E.C.S.S. in order to enable you to use it safely and effectively. 29.1 STRUCTURE AND FUNCTION OF E.C.S.S. The E.C.S.S. uses the hydraulic spring effect of the hydraulic accumulator installed to the circuit at the lift cylinder bottom to absorb the vibration of the chassis when the machine is traveling.
Page 243: Method Of Operating E.c.s.s
OPTIONS, ATTACHMENTS 29.2 METHOD OF OPERATING E.C.S.S. The E.C.S.S. switch is on the left side of the panel. When the E.C.S.S. switch is pressed, it is turned ON, the pilot lamp (orange) lights up, and the E.C.S.S. is actuated. If the switch is press again, it is turned off, the pilot lamp goes out, and the E.C.S.S.
Page 244: Precautions When Handling Accumulator
OPTIONS, ATTACHMENTS 29.4 PRECAUTIONS WHEN HANDLING ACCUMULATOR WARNING The accumulator is charged with high-pressure nitrogen gas, which is extremely dangerous, so read the following items and be careful to handle the accumulator properly. If any problem or failure occurs with the accumulator, contact your distributor immediately.
Page 245 Komatsu America International Company 440 North Fairway Drive Vernon Hills, IL 60061-8112 U.S.A. PROPOSAL FOR MANUAL REVISION Attn: Technical Publications Fax No. (847) 970-4186 FOR INTERNAL USE ONLY -- No. PMR P NAME OF COMPANY: LOCATION: PHONE NO: DEPARTMENT: DATE:...

Komatsu WA250-3 Operation & Maintenance Manual

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