Page 1 A60001 and UP This material is proprietary to Komatsu Utility Division and is not to be reproduced, used, or disclosed except in accordance with written authorization from Komatsu Utility Division. It is our policy to improve our products whenever it is possible and practical to do so. We reserve the right to make changes or add improvements at any time without incurring any obligation to install such changes on products sold previously.
Page 3 PARTS BOOK - PAPER: Chassis and Engine (WB140-2N)....... BEPB020801 Chassis and Engine (WB150-2N)....... BEPB021300 OPERATION AND MAINTENANCE MANUAL: Chassis and Engine .
Page 4 REQUISITION FOR TECHNICAL SERVICE PUBLICATIONS AND SERVICE FORMS COMPLETE FORM DataKom Publishing Division AND RETURN TO 440 North Fairway Drive Vernon Hills, IL 60061-8112 U.S.A. Attn: Service Publications Fax No. (847) 970-4186 Tel No. (847) 970-5887 COMPANY NAME PURCHASE ORDER NO. SHIP TO ATTN.
Page 5 0INTRODUCTION WB140-2N, WB150-2N...
Page 6: Introduction
Continuing improvements in the design of this machine can lead to changes, which may not be reflected in this manual. Con- sult your local KOMATSU distributor or for the latest available information on your machine or for questions regarding infor- mation in this manual.
Page 7: Safety Information
Safety precautions are described in SAFETY section 1. KOMATSU 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. If any procedures or actions not specifically recommended or allowed in this manual are used, you must be sure that you and others can do such procedures and actions safely and without damaging the machine or causing injury.
Page 8: Approved And Non-Approved Uses
APPROVED AND NON-APPROVED USES The Komatsu BACKHOE LOADERS described in this manual have been designed and constructed to be used mainly for the following functions, any non-approved used may void the warranty, damage the machine or possibly injure the operator.
Page 9: Product Information
INTRODUCTION PRODUCT INFORMATION Listed are features and machine identification locations. Komatsu backhoe loader and main components are identified by serial numbers stamped on identification plates or decals attached to the machine or component. MAIN FEATURES • Simple and easy operation.
Page 10: Product Identification
The machine serial number is stamped on the right side of the front part of the main tractor frame. MACHINE IDENTIFICATION PLATE The Komatsu backhoe loaders described in this manual are provided with the “CE” mark which certifies that they are in compliance with the CE standards.
Page 11: Engine Serial Number And Emission Label
The serial number for the front axle is stamped on a plate located on the right side of the axle housing. REAR AXLE SERIAL NUMBER The serial number for the rear axle is stamped on a plate located on the right side of the axle housing. WB140-2N, WB150-2N...
Page 12: Transmission Serial Number
The serial number for the cab is stamped on a plate located on the right center pillar. CANOPY SERIAL NUMBER The serial number for the canopy is stamped on the plate located on the inside upper right corner. WB140-2N, WB150-2N...
Page 13: Serial Numbers And Dealer Information
INTRODUCTION SERIAL NUMBERS AND DEALER INFORMATION MODEL: WB140-2N / WB150-2N Machine # Engine # Front axle # Rear axle # Transmission # Cab or Canopy # Dealer: Address: Phone # Contacts: NOTES: WB140-2N, WB150-2N...
Page 14: Table Of Contents
MODEL: WB140-2N / WB150-2N ........
Page 15 EMERGENCY EXIT ............2-6 WB140-2N, WB150-2N...
Page 16 DECLUTCH BUTTON ............2-18 0-12 WB140-2N, WB150-2N...
Page 17 CHANGING THE FRONT BUCKET ..........2-37 WB140-2N, WB150-2N...
Page 18 KOMATSU BACKHOE CONTROLS ........
Page 19 CHECKING WHEEL LUG NUT TORQUE ........3-39 MAINTENANCE AFTER FIRST 500 HOURS OF OPERATION ......3-40 WB140-2N, WB150-2N 0-15...
Page 20 STANDARD OVERALL DIMENSIONS ......... . . 4-2 0-16 WB140-2N, WB150-2N...
Page 21 LIFTING CAPACITY WB140-2N ........
Page 22 USING THE JACK HAMMER ..........5-21 0-18 WB140-2N, WB150-2N...
Page 23 1SAFETY 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. WB140-2N, WB150-2N...
Page 24: Safety
Never drive up to anyone standing in your path of travel. Always be sure all personnel are standing to the side when you approach them and acknowledge your approach. Follow all rules relating to safety as outlined in this manual and by your company, never get involved in horseplay. WB140-2N, WB150-2N...
Page 25: Safety Features
UNAUTHORIZED MODIFICATIONS Any modification made without authorization from Komatsu can create a hazards. Before making any modifications, consult your local distributor. Komatsu will not be responsible for any injury or damage caused by any unauthorized modifications. WB140-2N, WB150-2N...
Page 26: Leaving Operator's Compartment
Keep in mind you are responsible for securing your machine. Remark Never leave your machine running and unattended, even for a moment. Work equipment posture: See “PARKING THE MACHINE” on page 2-50. Lock:See “SAFETY LOCK USAGE” on page 2-44. WB140-2N, WB150-2N...
Page 27: Mounting And Dismounting
Stop the engine and do not smoke when refueling. • Tighten all fuel and oil caps securely. • Refueling or adding oil should be made in well ventilated areas. • Keep oil and fuel in its proper place. • Clean up any fluid spills. WB140-2N, WB150-2N...
Page 28: Dust Hazard Precautions
SAFETY DUST HAZARD PRECAUTIONS Dust can be hazardous to your health if it is inhaled. Komatsu does not use asbestos in its products, but if you handle materials containing asbestos fibers or other dust materials during demolition operations, always do as follows.
Page 29: Inside Operator's Compartment
When installing and using an optional attachment, read the instruction manual for the attachment and information related to the attachments. Do not use attachments that are not authorized by your Komatsu Distributor. Use of unauthorized attachments could create a safety problem and adversely affect proper operation and useful life of the machine.
Page 30: Precautions Before Starting Work Operations
C. Be sure the hood closes properly and will lock securely to prevent tampering by others. WB140-2N, WB150-2N...
Page 31: In The Operator's Cab
Sound your horn to warn others in the area before starting the engine or moving the machine. • Operate the machine in a seated position only, with the seat belt fastened snugly around your waist. • Do not allow anyone in the cab or on the machine during operations. WB140-2N, WB150-2N...
Page 32: Work Site Hazards
If low power lines pose a greater hazard, ask the power company to remove the lines until your work is finished. Cable Voltage Min. Safe Distance 6.6kV 10 ft. 66.0kV 16 ft. 275kV 10 m 33 ft. 1-10 WB140-2N, WB150-2N...
Page 33: Rules For Road Travel
Center the boom and install the lock pin. Connect the safety cables to prevent accidental lowering of the out- riggers. Lock the backhoe control levers using the safety lock equipped with the machine. WB140-2N, WB150-2N 1-11...
Page 34: Rules For Traveling In Reverse
Avoid operating the machine too close too the edge of a cliff, open trenches or ditch lines. These areas may collapse under the weight of your machine causing serious damage to the machine or injury to the operator. • Keep in mind after a heavy rain or thaw, the surface conditions become worse and less stable. 1-12 WB140-2N, WB150-2N...
Page 35: Precautions During Maintenance Operations
EQUIPMENT STORAGE Always store optional or extra work equipment in a safe and secureloca- tion. Store equipment in such a way that it cannot fall or cause injury to oth- ers. WB140-2N, WB150-2N 1-13...
Page 36: Working Under The Machine
Never use high pressure water or flood the inside of the operator’s cab. Doing so may damage sensitive electrical components. When pressure washing, use high pressure hot water and mild grease cutting soaps. Always grease the machine after cleaning to push any water out of the pivot point connections. 1-14 WB140-2N, WB150-2N...
Page 37: Running The Machine During Maintenance
Never dump used coolant on the ground, in a lake, stream or in a sewer system. EPA Law requires these fluids to be captured and recycled prop- erly. Failure to do so is in violation of the law. WB140-2N, WB150-2N 1-15...
Page 38: Battery Precautions
Never try to start the machine by tampering or shorting the starter termi- nals. Accidental movements of the machine could cause injury or even death. Always start the machine seated in the operators cab using the ignition switch. See “BASIC TROUBLESHOOTING” on page 2-56. 1-16 WB140-2N, WB150-2N...
Page 39: High Pressure Hoses
Take particular care near rotating parts. Keep your body at a safedis- tance. If hands, clothing, or tools become entangled in the fan blades or fan belt, severe injury may result. Keep well away from all rotating parts. WB140-2N, WB150-2N 1-17...
Page 40: Disposal Of Waste Materials
According to test results carried out to determine the vibrations transmitted to the operator by the machine, the upper limbs are subjected to vibrations lower than 2.5 m/sq.sec. (8.2 ft./sq.sec.). The seated part of the body is subject to vibrations lower than 0.5 m/sq. (1.7 ft./sq.sec.). 1-18 WB140-2N, WB150-2N...
Page 41: Safety And Warning Decals
LOCATION OF THE SAFETY DECALS • Your Komatsu Dealer can supply you with new replacement decals if the ones on the machine are damaged or missing. • When replacing damaged or missing decals, be sure they are placed in the proper location.
Page 42 SAFETY 1-20 WB140-2N, WB150-2N...
Page 43 Because of the additional height posed by the backhoe boom 1m (3 ft.) is added above the canopy when the machine is in the travel posture. WB140-2N, WB150-2N 1-21...
Page 44 Lock the loader controls. • Curl the bucket and move the arm in towards the frame until they stop. • Activate the boom lock and insert the travel pin. • Lock the backhoe controls. • Engage the parking brake. 1-22 WB140-2N, WB150-2N...
Page 45 This warning tag must be kept with the machine at all times and used when maintenance or repairs are performed. Hydraulic Oil Hot oil hazard. • Turn the engine OFF. • Allow the oil time to cool down. • Slowly loosen the cap to relieve pressure before removing. WB140-2N, WB150-2N 1-23...
Page 46 If you should come in contact with battery acid or spill some, flush the area immediately with water. Window Warning When operating the window, be sure it is in the proper locked position to avoid sudden unexpected movement. 1-24 WB140-2N, WB150-2N...
Page 47 Keep element free of damage or oil deposits. • For cleaning or replacement of the element, see “CHECK- ING, CLEANING, OR CHANGING AIR CLEANER CARTRIDGE” on page 3-56. • Do not use oil on this filter element. WB140-2N, WB150-2N 1-25...
Page 48 Manual” for proper procedures. 13. Do Not Use Ether Use of starting aids. • Use of any starting fluids including ether may cause explo- sion or damage the engine. • Never use starting aids to start the engine. 1-26 WB140-2N, WB150-2N...
Page 49 15. Pinch Point Danger Crush or pinch points located on the machine. • Operate the machine from the operator’s seat only. • During operations, never place any part of your body near the swing area of the machine. WB140-2N, WB150-2N 1-27...
Page 50 17. Blocking Wheels Parking on an incline. • Always block the wheels when parking on an incline. 1-28 WB140-2N, WB150-2N...
Page 51 • Empty the bucket completely. • Raise the loader and install the safety bar. • Slowly lower the loader cylinder until all movement stops. • Lock the loader controls. WB140-2N, WB150-2N 1-29...
Page 52 • Never weld, drill or cut on the ROPS • If it becomes damaged, contact your Komatsu Dealer. 21. Brake Fluid Use the correct fluid in the hydraulic braking system. Using the wrong brake fluid may cause damage to the brake system which could lead to brake failure.
Page 53 It shows: • Loader lever lock. • Bucket positions. • Switch functions. 24. Lubrication This decal is the lubrication chart for your machine it contains information on: • Lubricating time intervals. • Lubrication points. WB140-2N, WB150-2N 1-31...
Page 54 SAFETY 25. Equipment Fuse Decal 26. Engine Fuse Decal 1-32 WB140-2N, WB150-2N...
Page 55: Location Of The Pictogram Decals
SAFETY LOCATION OF THE PICTOGRAM DECALS • Your Komatsu Dealer can supply you with new replacement pic tog ram decals if the ones on the machine are damaged or missing. • When replacing damaged or missing pic tog ram decals, be sure they are placed in the proper location.
Page 56 SAFETY 1-34 WB140-2N, WB150-2N...
Page 57 2OPERATION WB140-2N, WB150-2N...
Page 58: General View Of Machine
Keep in mind front and rear view references for this machine are different. FRONT VIEW OF MACHINE 1. Front Bucket 5. Rear Axle 2. Bucket Cylinder 6. Fuel Tank 3. Bucket Arms 7. Lift Cylinder 4. Cab 8. Front Axle WB140-2N, WB150-2N...
Page 59: Rear View Of Machine
OPERATION REAR VIEW OF MACHINE 1. Bucket 6. Boom Cylinder 2. Bucket Cylinder 7. Hydraulic Oil Tank 3. Arm 8. Outriggers 4. Boom 9. Boom Swing Cylinders 5. Arm Cylinder 10. Boom Support Boss WB140-2N, WB150-2N...
Page 60: Pictograms
MOVING OR ROTATING ENGINE COMPONENTS Always keep clear of rotating or moving parts especially in the engine compartment. FILLING THE HYDRAULIC SYSTEM This is only for machines using biodegradable oil. (Type HEES) ENGINE OIL FILTER BRAKE FLUID WB140-2N, WB150-2N...
Page 61: Fuel Filter
OPERATION FUEL FILTER ENGINE COOLANT AIR FILTER ENGINE COOLANT PRESSURE WARNING HYDRAULIC OIL LEVEL HYDRAULIC OIL FILTER WB140-2N, WB150-2N...
Page 62: Transmission Oil Level
OPERATION TRANSMISSION OIL LEVEL TRANSMISSION FLUID FILTER ANCHORAGE POINT EMERGENCY EXIT BOOM LOCK SWING LOCK WB140-2N, WB150-2N...
Page 63: Description Of Machine Operation Controls
Gear shift lever Front end loader control lever Accelerator pedal Brake pedals Side dash bezel Throttle control lever Parking brake Left backhoe wobble stick Right backhoe wobble stick Right outrigger control Left outrigger control Steering wheel adjustment (optional) WB140-2N, WB150-2N...
Page 64: Front Instrument Bezel And Controls
Let the transmission oil cool down with the engine running at about 1200 RPM until the warning and alarm stop. If this should occur repeatedly have the machine checked by an authorized Komatsu Dealer. Do not continue to operate the machine. ENGINE COOLANT TEMPERATURE ALERT This warning light (2) comes on along with an audible alarm to alert the operator of an engine overheat condition.
Page 65: Directional Signal Indicator
If this warning lamp should come on intermittently during opera- tion or remain on after start-up, do not operate the machine. Have the braking system checked by an authorized Komatsu Dealer. DIFFERENTIAL (LOCK/UNLOCK) INDICATOR When the differential lock feature is in (LOCK), the indicator lamp (8) will come on indicating it is in operation. When the indicator lamp is off the differential is (UNLOCKED).
Page 66: Four-Wheel Drive Switch
This switch operates the four-way (HAZARD) flashers (13) when turned on. This feature must be used when traveling on roadways or when working in areas that need additional warnings. OPTIONAL EQUIPMENT SWITCH This location is for any optional equipment (14). 2-10 WB140-2N, WB150-2N...
Page 67: Side Instrument Bezel And Controls
This gauge (2) indicates the engine RPM (Revolutions Per Minute). It also indicates the running hours on the engine Remark The hour meter is considered valid for calculating the mainte- nance or service hour intervals for the machine. WB140-2N, WB150-2N 2-11...
Page 68: Engine Coolant Temperature Gauge
If this light does not come on when the ignition key is turned on, have the system checked by your Komatsu dealer. Do not operate the machine if this light comes on intermittently or remains on, damage to the engine may result.
Page 69: Engine Coolant Temperature Alert
The first position on the switch operates the wipers. The second position operates the washer. EMERGENCY FLASHING LIGHT SWITCH (If equipped) This switch (13) is for operating the rotating or flash- ing light mounted on top of the ROPS. WB140-2N, WB150-2N 2-13...
Page 70: Rear Horn
BLOWER SWITCH The blower switch (18) is used to control the operation of the blower motor for the air circulation, it has three speeds: • • Medium • High See “CAB ENVIRONMENT AND SAFETY EQUIPMENT” on page 2-21. 2-14 WB140-2N, WB150-2N...
Page 71: Backhoe Power Control Switch
This feature should be used when operating the front end loader or traveling with the machine. OPTIONAL SWITCH LOCATIONS This switch location (21) is for optional equipment is needed. WB140-2N, WB150-2N 2-15...
Page 72: Front End Loader Controls
Loss of control may result. Remark This function does not work in 4th. gear range. Before engaging this feature be sure the machine is stopped or traveling at a slow speed. 2-16 WB140-2N, WB150-2N...
Page 73: Bucket Open Button
Pressing this button allows the operator extra power to the loader system. Remark It is advisable to use this feature for no more than 5 to 6 sec- onds during loader operation. WB140-2N, WB150-2N 2-17...
Page 74: Gear Shift Lever Controls
The machine can only be started in the (N) neutral position. When parking the machine, shift into the (N) posi- tion and set the parking brake for safety. Avoid changing direction when traveling at fast speeds, always slow down and apply the brakes before changing direction. 2-18 WB140-2N, WB150-2N...
Page 75: Brakes, Parking Brake, Accelerator And Throttle Control
Leaving the machine in gear with the engine off and the directional control set in the forward or reverse position will not hold the machine in place, the parking brake must be used. Always park the machine in neutral. WB140-2N, WB150-2N 2-19...
Page 76: Accelerator Pedal
Red area “B”: This area indicates the engine speed is in the range of 1900 RPM which is the maximum speed allowed for the use of the backhoe. Remark Throttle speed can be monitored using the tachometer on the side instrument bezel. 2-20 WB140-2N, WB150-2N...
Page 77: Cab Environment And Safety Equipment
Inside cab air is picked up through vent (5) and circulated past the heater core. Vents (1) supply the rear and front of the cab. Front And Side Air Supply Vents (1) WB140-2N, WB150-2N 2-21...
Page 78: Seat And Seat Belt
Never rely on a damaged or worn seat belt to hold you in place if a roll- over should occur. Getting in the habit of using the seat belt could save your life. Remark The seat belt must be replaced every 4 years due to fatigue. 2-22 WB140-2N, WB150-2N...
Page 79: Safety Equipment And Storage Areas
This location is for storing extra tools if needed. When using the tool case (1) be sure the cover (2) is closed firmly to prevent tools from fall- ing out and getting caught in the work equipment. WB140-2N, WB150-2N 2-23...
Page 80: Cab And Guards
The side window must always be secured in the open position with the locks (5) or they must remain closed. When the windows are closed, always secure them with the safety device block (8). Periodically lubricate the elastic locks (5) with the specified grease. 2-24 WB140-2N, WB150-2N...
Page 81: Engine Hood
Do not operate the machine without a hood. • When doing maintenance with the front end loader raised, be sure to engage the safety lock in the loader arm. • Always lower the loader completely to the ground when opening the hood. WB140-2N, WB150-2N 2-25...
Page 82: Electrical
Rotate the switch counter clock- wise to disconnect the electrical system. To re-connect the electrical system, rotate the switch clockwise. OPTIONAL ELECTRICAL SWITCH LOCATION This location would be reserved for any electrical or electrically oper- ated accessories. 2-26 WB140-2N, WB150-2N...
Page 83: Fuses And Relays
When replacing fuses or relays always check the condition of the contacts for corrosion. If the panel is badly corroded, con- tact your Komatsu Dealer for repair. Never replace a fuse with a fuse of higher or lower amp rating. Damage to the elec- trical system may result.
Page 84: Fuse And Relay Panel Lay Out
Light blue DL19 Front work lamps Light blue DL20 Windshield wiper - Flashing light Brown DL21 Dimmer switch - Horn relay DL22 Direction indicators Brown DL23 Monitor (if provided) DL24 Horn Brown DL25 Alternator - Engine stop solenoid 2-28 WB140-2N, WB150-2N...
Page 85: Engine Fuse And Relay Location
When replacing fuses or relays always check the condition of the contacts for corrosion. If the panel is badly corroded, con- tact your Komatsu Dealer for repair. Never replace a fuse with a fuse of higher or lower amp rating. Damage to the elec- trical system may result.
Page 86 White Glow plug preheat Green Engine stop Blue Engine start White Alternator Relay Circuit Involved With Inoperable Relay Position Engine stop enable timer Preheat timer Glow plug preheat relay Engine stop solenoid relay Engine start enable relay 2-30 WB140-2N, WB150-2N...
Page 87: Operating The Machine
If the engine does not start within 15 seconds, release the ignition switch and wait for 30 seconds before trying again. If it will not start, do not continue to crank the engine, damage to the starter may result. Contact your Komatsu Dealer for repairs. WB140-2N, WB150-2N...
Page 88: Starting The Engine In Cold Weather
If the engine does not start within 15 seconds, release the ignition switch and wait for 30 seconds before trying again. If it will not start, do not continue to crank the engine, damage to the starter may result. Contact your Komatsu Dealer for repairs. 2-32...
Page 89: Warming The Machine Up
2-50. • Turn the ignition switch to the “OFF” position and remove the key. Remark Never shut the engine down at a high RPM always allow the engine time to idle and cool down before shutting down. WB140-2N, WB150-2N 2-33...
Page 90: Operating The Front End Loader And Backhoe
- Neutral position (no boom or bucket movement) - Bucket curl back - Arm lower - Bucket dump - Arm raise - Arm in free float position - Self leveling (return to dig) 2-34 WB140-2N, WB150-2N...
Page 91: Performing Loading Operations
20 m (40 ft.) away from you and your work area. Remark When using the declutch button during loader operations always bring the machine to a full stop before chang- ing speed ranges. WB140-2N, WB150-2N 2-35...
Page 92: Loading Heaped Material
Once you are at your point of deposit, stop, raise the load and move toward the truck or trailer slowly. Once you are over the center of the bed, deposit your load, back up far enough to clear the truck or trailer and lower your empty bucket. 2-36 WB140-2N, WB150-2N...
Page 93: Working On Slopes With A Loaded Bucket
Reinstall the bolts and tighten them in place. • Lubricate all pin locations. Never use your fingers or hands to line up the pin or bolt holes. If hole alignment is not correct, use a steel drift to line up parts. WB140-2N, WB150-2N 2-37...
Page 94: Operating The Backhoe
Never operate the backhoe without low- ering the outriggers and do not lower the outriggers one at a time. Remark When retracting the outriggers, bring both outriggers up slowly and at the same time, lowering the machine evenly and squarely back down. 2-38 WB140-2N, WB150-2N...
Page 95: Adjusting The Digging Bucket
Pos. 1: Normal digging operations ensures more breakout power to the bucket. Pos. 2: Suitable for operations on vertical walls, ensures the maximum movement and digging height on walls. In this position the breakout force is reduced. WB140-2N, WB150-2N 2-39...
Page 96: Digging Methods
The bucket is pushed upward, lifting the machine thus not filling the bucket. Sequence 1-2-3, shows the proper way to excavate a trench. Always keep the cutting edge of the bucket tipped down slightly but parallel with the surface being excavated. 2-40 WB140-2N, WB150-2N...
Page 97: Changing The Backhoe Bucket
Reinstall the safety stop (3). • Lubricate all pin locations. Never use your fingers or hands to line up the pin or bolt holes. If hole alignment is not correct, use a steel drift to line up parts. WB140-2N, WB150-2N 2-41...
Page 98: Iso Backhoe Controls
- Arm retract - Boom swing left Right Wobble Stick Control Lever (combined) - Neutral - Boom lower - Bucket curl - Boom lower - Bucket open - Boom raise - Bucket open - Boom raise - Bucket curl 2-42 WB140-2N, WB150-2N...
Page 99: Komatsu Backhoe Controls
OPERATION KOMATSU BACKHOE CONTROLS Left Wobble Stick Control Lever (single) - Neutral - Boom swing to the left - Boom lower - Boom swing to the right - Boom raise Right Wobble Stick Control Lever (single) - Neutral - Bucket curl...
Page 100: Safety Lock Usage
Slowly lower the front end loader unit until it makes contact with the cylinder lock. Check to be sure the cylinder lock is secularly in place before proceeding with any procedures under the front end loader. 2-44 WB140-2N, WB150-2N...
Page 101 12. Re-install the cylinder safety lock (1) back in the storage location on the left lift arm shown in illustration (B) Always keep the cylinder safety lock with the machine. Never use a substitute or damaged cylinder lock. If it is missing or damaged have it replaced immediately. WB140-2N, WB150-2N 2-45...
Page 102: Backhoe Locks
12. Install the locking safety cables (6) on both outriggers and be sure to re-lock the wobble stick lock (5). Remark The lock pin and the safety cables must remain with the machine. If they are lost or damaged, they must be replaced. 2-46 WB140-2N, WB150-2N...
Page 103: Moving Or Traveling With The Machine
Select the desired speed range suitable for travel. If you will be traveling in a higher speed range, always start out at a lower speed range and shift up to the higher ranges. See “GEAR SHIFT LEVER CONTROLS” on page 2-18. WB140-2N, WB150-2N 2-47...
Page 104: Traveling On Slopes
Doing so may cause the machine to rollover. Always be aware of your travel surfaces. Wet leaves, grass or mud may hinder your control. Never turn on a slope or travel across a slope. 2-48 WB140-2N, WB150-2N...
Page 105: Traveling Or Working In Swampy Or Wet Areas
It is advised to operate the machine in a water depth no deeper than 50 cm (20 in). A depth deeper than 50 cm (20 in) may damage the machine. After you have completed your work or travel through water or muddy areas always clean the machine and lubricate any com- ponents that may have been immersed in the mud or water WB140-2N, WB150-2N 2-49...
Page 106: Parking The Machine
PARKING THE MACHINE The Komatsu backhoe is set-up to be parked in a secure manor. If you will be leaving the machine for a short or long period of time it is important to use all the security features equipped with your machine.
Page 107: Parking On An Incline
Never park the machine with the wheels off the ground. The danger of having the machine lowered on to someone becomes possible when the machine is unattended. Always lower the work equipment and machine down to the ground fully when parking the machine. WB140-2N, WB150-2N 2-51...
Page 108: Transporting The Machine
Secure the machine with tie-downs/chains (4) at the anchor points shown in illustrations (A & B). To help keep the machine in position, place blocks (3) in front and behind the front and rear wheels for extra support. Protect the exhaust stack (5) from moisture if needed. 2-52 WB140-2N, WB150-2N...
Page 109: Emergency Recovery
Be sure the tow cables are the same length when towing. Never stand next to the tow lines then towing the machine. The cable or chain could brake causing injury. Always stay clear of towing equipment. WB140-2N, WB150-2N 2-53...
Page 110: Precautions During Seasonal Changes
Electrolyte Temperature Percentage Of Charge ° ° ° ° ° ° ° ° C (68 C (32 C (14 C (-4 100% 1.28 1.29 1.30 1.31 1.26 1.27 1.28 1.29 1.24 1.25 1.26 1.27 1.23 1.24 1.25 1.26 2-54 WB140-2N, WB150-2N...
Page 111: Warm Seasons
See “CHANGING COOLANT” on page 3-53. Never mix antifreezes or add additives to the cooling system. Remark Never use flammable liquids or “water only” in the cooling system. WB140-2N, WB150-2N 2-55...
Page 112: Basic Troubleshooting
OPERATION BASIC TROUBLESHOOTING Always contact your Komatsu Dealer when you have to carry out any troubleshooting procedures. If the problem or failure is not listed in the troubleshooting section, contact your Komatsu Dealer immediately and have them check the problem.
Page 113: Starting The Engine With Booster Cable
Remove the other clip of booster cable (B) from the negative termi- nal (3) on the operating machine. Remove one clip of booster cable (A) from the positive terminal on the operating machine (2). WB140-2N, WB150-2N 2-57...
Page 114 OPERATION Remove the other clip of booster cable (A) from the engine block on the problem machine (1). 2-58 WB140-2N, WB150-2N...
Page 115: Electrical Circuits
Equipment control levers do not return to the neutral position: spool. tion of valve body • Faulty pump. • Repair or replace. • Pressure valve defective or stuck. • Calibrate or replace. Work equipment moves very slow • Dirty drain filter. • Replace. WB140-2N, WB150-2N 2-59...
Page 116: Braking System
Damaged heat exchanger. • Replace. • Faulty pump. • Replace. Noisy converter: • Damaged bearings. • Remove and replace. • Low engine RPM causing stall. • Check engine. Lack of power: • Overheating. • See overheating remedies. 2-60 WB140-2N, WB150-2N...
Page 117: Engine
Replace injectors. Popping noise heard at exhaust stack: • Improper fuel Cetane rating. • Change fuels. • Overheating. • See “temperature indication”. Abnormal engine noise: • Damaged exhaust muffler. • Replace. • Excessive valve clearance. • Adjust valves. WB140-2N, WB150-2N 2-61...
Page 118 OPERATION 2-62 WB140-2N, WB150-2N...
Page 119 3MAINTENANCE WB140-2N, WB150-2N...
Page 120: Guide To Maintenance
Only perform operations on firm and level ground, after applying the parking brake. • Use Komatsu genuine oils and greases; choose oils suitable for the ambient temperature. • Use clean oils and greases. Keep the oil and grease containers clean. Keep any foreign matter away from oils and greases.
Page 121: Maintenance Notes
• Use only Komatsu genuine replacement parts. • Do not mix different types of oil. • Unless specified otherwise, oils and coolant used by Komatsu before delivery of the machine are as follows: Item Specifications SAE 10W-30 • Engine oil...
Page 122: Coolant
• Do not use corrosion inhibitors containing soluble oil, since they damage the rubber couplings. • In case of doubt, contact your Komatsu Dealer. FUEL • Always use fuel suitable for the engine. Other fuels with different specifications may damage the engine or reduce its power.
Page 123: Notes Regarding The Electrical System
3.Check the battery electrolyte level. • Do not remove or eliminate any electrical component installed on the machine and do not install any electrical component with characteristics different from those specified and approved by Komatsu. • Be careful to keep the electric system dry.
Page 124: Parts Subject To Wear That Periodically Need Changing
• The timely change of these parts ensures economical use of the machine. • Use only Komatsu genuine parts, which alone can guarantee excellent quality and interchangeability. Item Description Change Interval...
Page 125: Fuel, Coolant, And Lubricants
1.5 liter reduction (0.4 US gal) (0.4 US gal) gear (ea.) Hydraulic 20 liter 17 liter transmission (5.3 US gal) (4.5 US gal) DEXRO Brake sys- 0.8 liter 0.8 liter N II D (0.2 US gal) (0.2 US gal) WB140-2N, WB150-2N...
Page 126: Grease
14 liter cooling sys- Coolant (3.7 US gal) OPTION FOR VERY COLD AREAS: If the temperature exceeds 10° C (50° F), contact your Komatsu Dealer for advise on the type of oil to be used. GREASE Lubrication Points Consistency Type...
Page 127 • Use Komatsu genuine oil which has been specifically formulated and approved for use in the engine, hydraulic work equipment, transmission, axles, and brakes. Specified capacity: Total amount of oil including oil for components and oil in piping.
Page 128 Sunoco ultra Sunoco antifreeze and prestige 2EP summer coolant Sun prestige 742 Ursa Super TD Havoline ATF SAE 15W-40 Dexron II TEXACO Molytex EP2 Ursa Super LA Texamatic 7045 SAE 15W-40 (9226) UNION Guardol D21460 Unoba EP 3-10 WB140-2N, WB150-2N...
Page 129 40°C (104°F), then start moving the equipment, so that all the parts of the system are filled with oil. Stop the engine and check the oil level (See “CHECKING HYDRAULIC SYSTEM OIL LEVEL” on page 3-28 “). WB140-2N, WB150-2N 3-11...
Page 130: Lubrication Diagrams
MAINTENANCE LUBRICATION DIAGRAMS GENERAL • For lubrication procedures for single points See “MAINTENANCE PLAN” on page 3-22. Note: Use only recommended oil and grease, See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7. 3-12 WB140-2N, WB150-2N...
Page 131: Multipurpose Bucket And Pallet Forks
Points indicated are symmetrical and must be lubricated every 10 hours. • The fork sliding bars and safety pins must be lubricated with grease only to protect them from oxidation. • Fork joints (A) must be lubricated only if the forks are used. WB140-2N, WB150-2N 3-13...
Page 132: Front Bucket Quick Couplings
MAINTENANCE FRONT BUCKET QUICK COUPLINGS • Points indicated are symmetrical and must be lubricated every 10 hours. 3-14 WB140-2N, WB150-2N...
Page 133: Telescopic Arm
MAINTENANCE TELESCOPIC ARM • Points indicated are symmetrical and must be lubricated every 10 hours. WB140-2N, WB150-2N 3-15...
Page 134: Periodic Replacement Of Components Connected With Safety
Damaged hydraulic or fuel lines (cracks, wear and tear). Periodic check (annual check) Leakage from joints, fittings, hydraulic hoses/fuel lines. Deteriorated, twisted, damaged hydraulic hoses/fuel lines (cracks, wear and tear) or in contact with other parts of the machine. 3-16 WB140-2N, WB150-2N...
Page 135: Critical Parts For Safety
For serial numbers and quantity of components that periodically need replacing, consult the replacement parts manual sec- tion regarding the components connected with safety and components that must be periodically replaced. • When replacing hoses, always change o-rings, gaskets, and analogous components. WB140-2N, WB150-2N 3-17...
Page 136: Delivery / Return Hydraulic System
For serial numbers and quantity of components that periodically need replacing, consult the replacement parts manual sec- tion regarding the components connected with safety and components that must be periodically replaced. • When replacing hoses, always change o-rings, gaskets, and analogous components. 3-18 WB140-2N, WB150-2N...
Page 137: Loader And Backhoe Hydraulic System
Hydraulic hose (Cylinders - Loader bucket) Hydraulic hose (Cylinders - Multi-purpose bucket) Every 2 years or 4000 hours, whichever occurs first Hydraulic hose (Cylinders - Backhoe boom) Hydraulic hose (Cylinders - Backhoe arm) Hydraulic hose (Cylinders - Backhoe bucket) WB140-2N, WB150-2N 3-19...
Page 138: Operator's Safety
• When replacing hoses, always change o-rings, gaskets, and analogous components. OPERATOR’S SAFETY Components related to safety that Replacement periodically need replacement interval Safety belt Every 4 years 3-20 WB140-2N, WB150-2N...
Page 139: Standard Tightening Torque
Backhoe bucket Central teeth Side teeth 9.8143 ± 7.4106 ± 114.5 ± 1 196 ± 145 ± Front support central screw Rear support 20 ± 120 Engine and transmission 9.8196 ± 7.4145 ± central screw ± 1 WB140-2N, WB150-2N 3-21...
Page 140: Maintenance Plan
Check coolant level, (add coolant) 3-32 Brake system Check oil level 3-32 Propeller shafts Lubricate (6 points) 3-33 Front axle joints and central coupling Lubricate (5 points) 3-34 Front and rear wheels Check tire pressure 3-34 Electrical system Check 3-35 3-22 WB140-2N, WB150-2N...
Page 141 Only for machines in which synthetic biodegradable oil type HEES is used. • Perform these operations together with those to be initiated every “500 HOURS”. Item Description Operation Page Hydraulic oil and suction filter (Only for machines Change oil and clean filter 3-40 with synthetic biodegradable oil) WB140-2N, WB150-2N 3-23...
Page 142 Check clearance, (adjust) 3-50 MAINTENANCE EVERY 2000 HOURS OF OPERATION Item Description Operation Page Hydraulic oil and suction filter Change oil and clean filter 3-51 Coolant Change 3-53 Brake system oil Change 3-55 Alternator and starter Check 3-55 3-24 WB140-2N, WB150-2N...
Page 143 Service brake Check braking 3-63 Brake pedals Adjust stroke 3-64 Return to dig Adjust 3-64 MAINTENANCE INTERVALS WHEN DEMOLITION HAMMER IS USED Item Description Operation Page Hydraulic oil drain filter Change cartridge 3-65 Hydraulic oil Change 3-65 WB140-2N, WB150-2N 3-25...
Page 144: Checks Before Starting
• Check to see if there are frequent leaks, and perform any necessary repairs immediately. • If this occurs repeatedly, contact your Komatsu Dealer. Before starting the engine, check the following: Check for loose screws or nuts. Check for oil, fuel or coolant leakage.
Page 145: Checking Coolant Level
See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7. • If it is necessary to check the oil level during or soon after work, stop engine and wait for 15 minutes before checking. WB140-2N, WB150-2N 3-27...
Page 146: Checking Hydraulic System Oil Level
When adding oil, do not exceed the MAX level. This would damage the hydraulic system and cause oil to flow out. • If a constant or abnormal decrease of the oil level is observed, thoroughly check the hydraulic system, the pistons and pump for leaks. 3-28 WB140-2N, WB150-2N...
Page 147: Draining Water Separator
As a general rule, it is important to consider that each cylinder is provided with two grease fittings positioned on the cou- plings and that each pin serving as fulcrum point for movement is provided with at least one grease fitting. WB140-2N, WB150-2N 3-29...
Page 148: Joint Lubrication Points
Lift cylinder base pin (2 POINTS) Arm fulcrum pin (2 POINTS) Bucket cylinder base pin (2 POINTS) Multi-purpose bucket fulcrum pin (option) (2 POINTS) Multi-purpose bucket cylinder base pin (option) (2 POINTS) Multi-purpose bucket cylinder head pin (option) (2 POINTS) 3-30 WB140-2N, WB150-2N...
Page 149: Backhoe Lubrication Locations
Tie rod - lever coupling pin (2 POINTS) Tie rod - bucket coupling pin (2 POINTS) Lever fulcrum pin (1 POINTS) Bucket fulcrum pin (1 POINTS) Telescopic arm cylinder base pin (optional) (1 POINTS) Telescopic arm cylinder head pin (optional) (1 POINTS) WB140-2N, WB150-2N 3-31...
Page 150: Maintenance After First 50 Hours Of Operation
MAX. mark (See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7). Use new oil only. If constant and considerable leakages are observed, it is advisable to contact your Komatsu Dealer to have the system checked and necessary repairs made. 3-32 WB140-2N, WB150-2N...
Page 151: Lubricating Propeller Shafts
(See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7). Once lubrication has been completed, make sure that all the points have been lubricated and remove the contaminated grease that may have spread out of the joints. WB140-2N, WB150-2N 3-33...
Page 152: Lubricating Front Axle Joints Central Coupling
This check is indispensable to preserve the tires, keep them efficient over time and make them last longer. The correct pressures are indicated in the specifications section 4. (See “TIRES” on page 4-3.). While checking the pressure, check conditions of the tread and sidewalls 3-34 WB140-2N, WB150-2N...
Page 153: Checking Electrical System
HYDRAULIC OIL DRAIN FILTER CHANGE For details on the various maintenance operations, • See “MAINTENANCE EVERY 500 HOURS OF OPERATION” on page 3-41. • See “MAINTENANCE EVERY 1000 HOURS” on page 3-47. For checks and adjustments, contact your Komatsu Dealer. WB140-2N, WB150-2N 3-35...
Page 154: Maintenance Every 250 Hours Of Operation
Lock screw (2) and check again. • Use a 12 mm wrench. Fan pulley Alternator pulley If the belt is worn, replace it and check tension again after a few hours of operation. 3-36 WB140-2N, WB150-2N...
Page 155: Cleaning Outside Of Radiator
It is advisable to add distilled water before starting work, in order to prevent freezing. Before reinstalling the cell plugs, make sure that the breather holes are not clogged. Make sure that the connection terminals are not oxidized; if necessary, clean them and cover them with anti-oxidation grease. WB140-2N, WB150-2N 3-37...
Page 156: Checking Front Axle Oil Levels
This check is visual and serves to verify that the lubricant reaches hole (2); if this does not occur, top off using the prescribed oil. (See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7). (Use a 1/2” square wrench). 3-38 WB140-2N, WB150-2N...
Page 157: Checking Hydraulic Transmission Oil Level
(Use a 27 mm wrench for the front wheels). (Use a 32 mm wrench for the rear wheels). Do not Increase the specified driving torque and keep it within the prescribed ranges. When the driving torque must be checked, do not lubricate the thread. WB140-2N, WB150-2N 3-39...
Page 158: Maintenance After First 500 Hours Of Operation
The following maintenance operation must be performed after the first 500 hours of operation, together with maintenance operations to be initiated “EVERY 500 HOURS”. • HYDRAULIC OIL CHANGE AND SUCTION FILTER CLEANING For further details on various maintenance operations, See “MAINTENANCE EVERY 2000 HOURS OF OPERATION” on page 3-51. 3-40 WB140-2N, WB150-2N...
Page 159: Maintenance Every 500 Hours Of Operation
Remove the oil pan drain plug (1). Collect used oil in a container of sufficient capacity. (Use a 19 mm wrench). While the oil flows out, remove filler cap (2), so that oil can flow freely. Change the engine oil filter. WB140-2N, WB150-2N 3-41...
Page 160: Changing Engine Oil Filter
Start the engine. Make sure that there are no leaks and that the oil pres- sure warning light goes out. Do not use the wrench to further tighten the filter. The filter may get damaged and cause an oil leak. 3-42 WB140-2N, WB150-2N...
Page 161: Changing Hydraulic System Oil Filter
Reassemble unit by proceeding in the reverse order, and make sure that cover (5) and gasket (11) are in perfect condition, and is housed in the cover seat. Reinstall upper platform (1) and secure it with fastening screws (2). WB140-2N, WB150-2N 3-43...
Page 162: Changing Fuel Filter
Give it another half turn by hand. Bleed the fuel supply circuit. BLEEDING THE CIRCUIT After filling the tank, proceed as follows: Turn ignition switch to “ON” position. Loosen drain screw (3) of filter head (2), using a 12 mm wrench. 3-44 WB140-2N, WB150-2N...
Page 163: Draining Fuel Tank
(32°F), the tank must be drained at the end of work or with the machine at operating temperature, to prevent condensation from freezing. Any condensation and impurities that may have accumulated inside the tank must be eliminated before refueling. WB140-2N, WB150-2N 3-45...
Page 164: Draining Hydraulic Oil Tank
(32°F), before starting the engine. When temperature is below 0°C (32°F), hydraulic oil tank must be drained at the end of work, or when temperature of the machine is sufficiently high, to prevent condensation from freezing and allow it to flow out of the tank. 3-46 WB140-2N, WB150-2N...
Page 165: Maintenance Every 1000 Hours
Reinstall plug (3). Move the machine both forward and backward. Stop it to check the oil level again. Always use oil of the prescribed type. (See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7). WB140-2N, WB150-2N 3-47...
Page 166: Changing The Rear Axle Oil
Reinstall plug (3). Move the machine both forward and backward and then stop it. Check the levels again. Always use oil of the prescribed type. (See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7). 3-48 WB140-2N, WB150-2N...
Page 167: Changing Hydraulic Transmission Oil
While engine is idling, add oil until the MIN. level is reached again. When oil reaches a temperature of approximately 50°C (122°F), add oil until it reaches the MAX. mark. For adding oil, See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7. Close the engine hood. WB140-2N, WB150-2N 3-49...
Page 168: Changing Hydraulic Transmission Filter
ANT, AND LUBRICANTS” on page 3-7). Reinstall cover (1). CHECKING AND ADJUSTING ENGINE VALVE CLEARANCE Since the check and adjustment of the engine valve clearance requires use of special tools, have these operations per- formed by your Komatsu Dealer. 3-50 WB140-2N, WB150-2N...
Page 169: Maintenance Every 2000 Hours Of Operation
Replace filter cartridge (6) and reassemble the whole unit. (See “CHANGING HYDRAULIC SYSTEM OIL FILTER” on page 3- 43). Reinstall drain plug (4) and fill oil tank with the prescribed oil until it reaches the proper level at (10). WB140-2N, WB150-2N 3-51...
Page 170 Always use oil of the prescribed type, (See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7). 11. Put back the upper platform (1) with relevant fastening screws (2). Do not start engine with an empty tank, since this would certainly damage the pump. 3-52 WB140-2N, WB150-2N...
Page 171: Changing Coolant
(See “FLUSHING COOLING SYSTEM” on page 3-59). Open engine hood. Loosen and remove upper radiator cap (1). WB140-2N, WB150-2N 3-53...
Page 172 Start engine and let it idle for a few minutes; check the coolant level again. Add coolant, if necessary. Reinstall upper radiator cap (1). Fill expansion tank (4) until the maximum level is reached, then close the engine hood. 3-54 WB140-2N, WB150-2N...
Page 173: Changing The Braking System Oil
BRAKE SYSTEM” on page 3-58). For details on oil to be used, See “FUEL, COOLANT, AND LUBRICANTS” on page 3-7. CHECKING ALTERNATOR AND STARTER • For any inspection and/or repair, contact your Komatsu Dealer. • If the engine is started frequently, have inspection done every 1000 hours of operation. WB140-2N, WB150-2N...
Page 174: When Required
Replace primary filter element after 6 cleaning operations or after one year. Every time the primary filtering element is replaced, the safety cartridge must also be replaced. 3-56 WB140-2N, WB150-2N...
Page 175: Checking And Cleaning Cab Air Filters
15 cm (5.9 in), making sure that pressure does not exceed 4-5 bars (58-73 psi). Carefully clean the filter casing, taking care to prevent any foreign debris from entering the suction duct, and then reas- semble the unit. WB140-2N, WB150-2N 3-57...
Page 176: Bleeding Brake System
Frequently check oil level in the brake system tank and top off whenever oil is near the minimum level. When adding oil, use only new oil of the prescribed type, See “FUEL, COOLANT, AND LUBRICANTS” on page 3- 3-58 WB140-2N, WB150-2N...
Page 177: Flushing Cooling System
Stop engine, let all the water flow out, close radiator drain cock (2) (see fig. B), and fill the system with coolant. Start engine and after a few minutes check the fluid level in the radiator, if necessary, add more coolant before tightening cap (1). WB140-2N, WB150-2N 3-59...
Page 178 MIN. and MAX. marks is reached. 10. Close the engine hood. The cooling system must be flushed more frequently if the water used contains a high quantity of calcium salts (if the water is very hard). 3-60 WB140-2N, WB150-2N...
Page 179: Cleaning The Water Separator
(1) after loosening nuts (2) that lock them. (Use 27 and 19 mm wrenches). During this check and the relevant adjustment, it is advisable to also check conditions of ball joints (3). If considerable slack is observed, immediately replace them. WB140-2N, WB150-2N 3-61...
Page 180: Checking And Adjusting Parking Brake
ADJUSTMENT With engine off, release the brake lever and rotate lever end (1) by giving it 2 or 3 counter-clockwise turns. Start the engine and check again. 3-62 WB140-2N, WB150-2N...
Page 181: Checking The Braking Efficiency
Engage 2nd gear and forward gear. Accelerate until reaching the maximum speed. Press the brake pedals. The machine must brake smoothly on a straight line and the tension of pedals must be constant. Otherwise, contact your Komatsu Dealer. WB140-2N, WB150-2N 3-63...
Page 182: Checking And Adjusting Brake Pedal Stroke
(See “FRONT END LOADER CONTROLS” on page 2-16). The sensor must be positioned at a distance of 2-4 mm (0.078-0.157 in) from the sliding rod. 3-64 WB140-2N, WB150-2N...
Page 183: Maintenance Intervals In Case Of Demolition Hammer Use
Change hydraulic oil in the tank according to intervals shown on table to the right. On machines containing synthetic biodegradable oil type HEES, change oil after the first 500 hours of operation, and for successive changes, adhere to the schedule provided on table to the right. WB140-2N, WB150-2N 3-65...
Page 184: Long Term Storage
11. Move the machine controls to neutral position and engage the mechanical safety locks of the equipment controls. 12. Hang a warning notice on the steering wheel to indicate condition of the machine. 13. Lock the cab doors, fuel tank cap, and engine hood. 3-66 WB140-2N, WB150-2N...
Page 185: During Storage
Warm up the hydraulic cylinders, by slowly moving all the work equipment as soon as possible. 10. Move at low speed and brake a few times in order to increase oil viscosity and allow the braking surfaces to seat. WB140-2N, WB150-2N 3-67...
Page 186 MAINTENANCE 3-68 WB140-2N, WB150-2N...
Page 187 4SPECIFICATIONS WB140-2N, WB150-2N...
Page 188: Specifications
2750 mm (9’ 0”) 2750 mm (9’ 0”) 2320 mm (7’ 8”) 2320 mm (7’ 8”) 2320 mm (7’ 8”) 2320 mm (7’ 8”) 3780 mm (12’ 4”) 3780 mm (12’ 4”) 3780 mm (12’ 4”) 3780 mm (12’ 4”) WB140-2N, WB150-2N...
Page 189: Technical Characteristics Wb140-2N (Aspirated Engine)
Komatsu diesel engine model ........
Page 190: Technical Characteristics Wb140-2N (Turbocharged Engine)
Komatsu diesel engine model ........
Page 191: Technical Characteristics Wb150-2N
Komatsu diesel engine model ........
Page 192: Lifting Capacities
G -Lowered stabilizers ............. . WB140-2N, WB150-2N...
Page 193: Lifting Capacity Wb140-2N
SPECIFICATIONS LIFTING CAPACITY WB140-2N WB140-2N, WB150-2N...
Page 194 SPECIFICATIONS WB140-2N, WB150-2N...
Page 195: Lifting Capacity Wb150-2N
SPECIFICATIONS LIFTING CAPACITY WB150-2N WB140-2N, WB150-2N...
Page 196 SPECIFICATIONS 4-10 WB140-2N, WB150-2N...
Page 197 5OPTIONAL ATTACHMENTS WB140-2N, WB150-2N...
Page 198: Optional Attachments
Failure to do so may result in damage to the equipment or injury to the operator. Komatsu cannot be held liable for damage, accident or reduction of machinery performance due to the application and use of unauthorized equipment.
Page 199: Optional Equipment Measurements For (Wb140-2N)
OPTIONAL ATTACHMENTS OPTIONAL EQUIPMENT MEASUREMENTS FOR (WB140-2N) Specific weight of the material handling = 1.8 tons/cu.m FRONT END LOADER Max. Dimensions Max. Max. SAE Max. Operating Max. Flow Weight Capacity Pressure Width Height Equipment Rate per Cu. m bar. minute (lb.)
Page 200: Optional Equipment Measurements For (Wb150-2N)
1800 0.200 Clamshell bucket (772) (25.6) (70.8) (0.26) (2900) (31.7) - Fork length 1140 mm (44.9 inches) - Maximum capacity 2000 kg (4409 lb.) - Measurement referenced to the tool diameter - Measurement referenced to the tool length WB140-2N, WB150-2N...
Page 201: Front Equipment Quick Coupling Devices
Raise the arm (6) to engage the pins (3) in the upper seats (4) on the bucket (5). When in place, raise the bucket slightly. Rotate the lock lever handle (1) to lock the fulcrum pin and hook up the safety restraint (7). Lube all fittings after installation. WB140-2N, WB150-2N...
Page 202: Multipurpose Bucket
Once the couplings are installed, start the engine and operate the control lever (2), open and close buttons (8) and (9). Turn the engine off and check for any leaks. See “FRONT END LOADER CONTROLS” on page 2-16. The bucket is opened and closed using two hydraulic cylinders (1) WB140-2N, WB150-2N...
Page 203: Bucket Operation
Unloading on high surfaces by opening the bucket instead of rolling it forward. • Grasping logs or objects. • Filling trenches and grading. The bucket is also equipped with an indicator (10) to show the position of the upper part of the bucket. WB140-2N, WB150-2N...
Page 204: Pallet Forks Kit
Supports (B) must also be removed. • Remove the fasteners (9) that hold the bar (2) in place. • Hold one of the supports (8) and withdraw the slide bar (2), repeat the same operation for the support. WB140-2N, WB150-2N...
Page 205 OPTIONAL ATTACHMENTS To install the forks, repeat the following procedure in reverse order. Always ware gloves and face shield when wen removing or installing the forks or any other optional equip- ment. WB140-2N, WB150-2N...
Page 206: Backhoe Telescopic Arm
When using a hammer, compactor, or similar attachments contact your Komatsu Dealer prior to using any attachment with the telescopic arm. To install the safety lock, retract the arm fully, remove the pin and clip from its holding place and insert it into the holes cut in the arm boss.
Page 207: Maintenance
Check the side which has the guide adjusting dowels (9) protruding the most. Only make adjustments on this side. Remark If adjusting dowels (9) protrude the same amount on both sides, the step 6 adjustment can be done on either the right or left side. WB140-2N, WB150-2N 5-11...
Page 208 The wear limit allowed for the shoes is represented by the minimum engagement of the adjusting dowels (9) in the lock nuts. The shoes must be replaced when the heads of the dowels (9) are recessed 5mm (0.2 in) inside lock nuts (10). Do not completely remove all slack, to prevent the guides from seizing. 5-12 WB140-2N, WB150-2N...
Page 209: Demolition Hammer
The arrangement includes the fixed connection of the hydraulic delivery line (2) and return line (3) with the hammer (4) WB140-2N, WB150-2N 5-13...
Page 210: Rules For Hammer Usage
Remember the power in the backhoe unit is the breakout feature when using this tool. Do not use the backhoe unit to reposition or swing the machine to the left or right. Doing so will damage the swing cylinders or possibly tip the machine over. 5-14 WB140-2N, WB150-2N...
Page 211: Always Avoid The Following Uses
Remember the power in the backhoe unit is the breakout fea- ture when using this tool. Do not use the backhoe unit to reposition or swing the machine to the left or right. Doing so will damage the swing cylinders or possibly tip the machine over. WB140-2N, WB150-2N 5-15...
Page 212 Working with the hammer in a horizontal position or even with the greater inclination of the machine. Striking the ground with the hammer bit. Lifting the machine with the demolition hammer 5-16 WB140-2N, WB150-2N...
Page 213: Installation And Removal Of The Demolition Hammer
Be careful not to get impurities between the couplings when installing them. Once connected and tight, start the engine and raise the ham- mer positioning it vertically. Stop the engine and lubricate all points on the hammer. Before starting work operations, check for any leaks. WB140-2N, WB150-2N 5-17...
Page 214: Clamshell Bucket
The counter clockwise rotation of the bucket is obtained by pressing the foot pedal rolling it backward. • To open the clamshell, move the right wobble stick to the right, and to close the clamshell, move the right wobble stick to the left. 5-18 WB140-2N, WB150-2N...
Page 215: Installation And Removal Of The Clamshell Bucket
REMOVAL To remove the clamshell bucket follow in the reverse order. When removing or installing the clamshell bucket, always wear eye and hand protection. OPERATING THE CLAMSHELL BUCKET Consult the specific operators manual for the clamshell bucket. WB140-2N, WB150-2N 5-19...
Page 216: Hydraulic Jack Hammer
If the switch is pressed a second time, the system is dis- engaged. When the system is in operation the switch will be illuminated. For operation of the jack hammer, see the manual provided with the tool. 5-20 WB140-2N, WB150-2N...
Page 217: Connecting And Removing The Jack Hammer
Turn ignition switch to the “I” position and press switch (4) to release any residual pressure from the hammer. Turn switch off. Disconnect the tool and cap all connection openings. USING THE JACK HAMMER For operation of jack hammer, see manual provided with the tool. WB140-2N, WB150-2N 5-21...
Page 218 OPTIONAL ATTACHMENTS 5-22 WB140-2N, WB150-2N...
Page 219 PROPOSAL FOR MANUAL OR CSS REVISION Data Kom Publishing Division 440 North Fairway Drive Vernon Hills, Il. 60061-8112 U.S.A. Attn: Service Publications Fax No. (847)-970-4186 DATE: FOR INTERNAL USE ONLY -- No.PMR NAME OF COMPANY: CITY: STATE OR PROVINCE: DEPARTMENT: COUNTRY: NAME: FAX:...

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