KOMATSU WA250-3 Wheel Loader Operation & Maintenance Manual (S/N: 53001 and up)

Operation & Maintenance Manual SEAM021 500 WA250= WHEEL LOADER SERIAL NUMBERS WA250-3 - 53001 andw This material is proprietary to Kornatsu America International Company and is not to be reproduced, used, or disclosed except in accordance with written authorization from Komatsu America International Company. 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. Due to this continuous program of research and development, periodic revisions may be made to this publication. It is recommended that customers contact their distributor for information on the latest revision. March 1998 Copyright 1998 Komatsu America International Company

INTRODUCTION 1. FORWARD This manual describes procedures for operation, handling, lubrication, maintenance, checking, and adjustment. It will help the operator and maintenance personnel realize peak performance through effective, economical and safe machine operation and maintenance. Keep this manual handy and have all personnel read it periodically_ If this manual is lost or becomes dirty and can not be read, request a replacement manual from your local distributor. If you sell the machine, be sure to give this manual to the new owner. 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 availabie information on your machine or for questions regarding information in this manual. A WARNING Improper operation and maintenance of this machine can be hazardous and could result in serious injury or death. Operators and maintenance personnel must read this manual thoroughly before operating or maintaining this machine. This manual should be kept near the machine for reference and periodically reviewed by all personnel who come across it. Some actions involved in operation and maintenance can cause a serious accident, if they are not performed in the manner described in this manual. The procedures and precautions given in this manual apply only to intended uses of the machine. If you use your machine for any unintended uses that are not specifically prohibited, you must be sure that it is safe for you and others. In no event should you or others engage in prohibited uses or actions as described in this manual. Komatsu America International Company delivers machines that comply with all applicable regulations and standards of the countty to which it has been shipped. If this machine has been purchased in another country or purchased from someone in another countty, it may lack certain safety features and specifications that are necessary for use in your country. If there is any question about whether your product complies with the applicable standards and regulations of your country, consult your local distributor or Komatsu America International Company before operating the machine. The description of safety is given in SAFETY INFORMATION on page O-3 and in SAFETY on page l-l. o-2

INTRODUCTION 2. SAFETY INFORMATION Most accidents are caused by the failure to follow fundamental safety rules for the operation and maintenance of machines. To avoid accidents, read, understand and follow all precautions and warnings in this manual and on the machine before performing maintenance and machine operations. To identify safety messages in this manual and on machine product graphics, the following signal words are used. A A A DANGER! - WARNING! - CAUTION! - This word is used on safety messages and product graphics where there is a high probability of serious injury or death if the hazard is not avoided. These safety messages and product graphics usually describe precautions that must be taken to avoid the hazard. Failure to avoid this hazard may also result in serious damage to the machine. This word is used. on safety messages and product graphics where there is a potentially dangerous situation, which could result in serious injury or death if the hazard is not avoided. These safety messages and product graphics usually describe precautions that must be taken to avoid the hazard. Failure to avoid this hazard may also result in serious damage to the machine. This word is used on safety messages and product graphics for hazards, which could result in minor or moderate injury if the hazard is not avoided. These safety messages and product graphics might also use this word for hazards where the only result could be damage to the machine. NOTICE - This word is used for precautions that must be taken to avoid actions, which could shorten the life of the machine. Safety precautions are described in SAFETY beginning on page I-l. 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. 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. If you are unsure about the safety of some procedures, contact your local distributor or Komatsu America International Company. o-3

INTRODUCTION 3. INTRODUCTION 3.1 INTENDED USE This WHEEL LOADER is designed to be used mainly for the following work: l Digging 0 Leveling l Pushing l Loading For details of the operating procedures, see “12.13 WORK POSSIBLE USING WHEEL LOADER” on page 2-52 3.2 FEATURES l 0 Curved glass and improved sealing for reduced noise, low vibration cab. Console and steering post with unencumbered foot area providing the same comfortable feeling as in an automobile Maintenance-free, wet-type disc parking brake (acts also as emergency brake). One-touch panel control and air conditioner with new refrigerant installed. Full fender system installed to help prevent mud or water from splashing on or around the machine. Light touch lever operations through use of electrical transmission control lever Pleasant operators compartment with low vibration and noise levels Large gull-wing side panels and a rear grill that opens fully for ease of maintenance Large safety lock lever for work equipment to ensure that operator does not forget to apply safety lock New engine that meets exhaust gas emission of 96 EPA & carb. 3.3 BREAKING IN A NEW MACHINE Your machine has been thoroughly adjusted and tested before shipment However, operating the machine under severe conditions at the beginning can adversely affect the performance and shorten the machine tie. Be sure to break in the machine for the initial 100 hours (as indicated by the service meter). During breaking in: l After starting, let the engine idle for 5 minutes to allow proper engine warm-up prior to actual operation. l Avoid operation with heavy loads or at high speeds. l Avoid sudden starts or acceleration, unnecessarily abrupt stops and sharp steering except in cases of emergency. The precautions given in this manual for operating, maintenance, and safety procedures are only those that apply when this product is used for the specified purpose. 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. Operations that are prohibited in this manual must never be carried out under any circumstance. 04

INTRODUCTION 4. LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DfSTRlBUTOR 4.1 MACHINE SERIAL NO. PLATE POSITION (A) Position of plate On the center right of the front frame. (6) Position of stamp This is stamped on the center of the front frame on the right hand side of the machine. 4.2 ENGINE SERIAL NO. PLATE POSITION Position of plate As viewed from the right hand side of the machine. 4.3 TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR Machine serial No.: Engine serial No.: Distributor name: Address: Phone: Service personnel for your machine: 1 REMARKS o-5

INTRODUCTION 5. CONTENTS INTRODUCTION 1. FORWARD .._............................_.......................................... O-2 2. SAFETYINFORMATION................................................................ O-3 3. INTRODUCTION.. ....................................................... 3.1 INTENDEDUSE ........................................................ 3.2 FEATURES ............................................................ 3.3 BREAKING IN A NEW MACHINE .......................................... ............ O-4 ............ O-4 ............ O-4 ............ O-4 4. LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR .................... O-5 4.1 MACHINE SERIAL NO. PLATE POSITION ................................................ O-5 4.2 ENGINE SERIAL NO. PLATE POSITION ................................................. O-5 4.3 TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR ....................................... O-5 5. CONTENTS.......................................................................... O-6 SAFETY 6. GENERAL PRECAUTIONS . _ . . _ . _ . . . . . . . _ . . . . . . . . . . . . . . . . . _ _ . . . . . . _ . . . _ . _ . . . . . _ l-2 7. PRECAUTIONS DURING OPERATION 7.1 BEFORE STARTING ENGINE . . . . 7.2 AFTER STARTING ENGINE . _ . . _ _ 7.3 TRANSPORTATION . . _ . _ _ _ . _ . 7.4 BATTERY . . . . . . . . _ . . . . . . 7.5TOWlNG ._._...._. _ . . . . . . . . ..__ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._. . . . . . . . . . . . . . . . .............. 1-8 .............. 1-8 ............. l-l 1 ............. I-20 ............. I-21 ............. l-24 8. PRECAUTIONS FOR MAINTENANCE .................................................... I-25 8.1 BEFORE CARRYING OUT MAINTENANCE .............................................. 1-25 8.2 DURING MAINTENANCE ............................................................ I-30 8.3 TIRES ............................................................................ l-35 9. POSITION FOR ATACHING SAFETY LABELS ............................................ l-37 9.1 POSITION FOR ATACHING SAFETY LABELS .......................................... 1-37 OPERATION lO.GENERALVlEW ...................................................................... 2-2 10.1 GENERAL VIEW OF MACHINE ....................................................... 2-2 10.2 GENERAL VIEW OF CONTROLS AND GAUGES ......................................... 2-3 11. EXPLANATlON OF COMPONENTS .......................... 11.1 METER, LAMPS ...................................... 11.1.1 WARNING DISPLAYS .............................. 11.1.2 METER DISPLAY PORTION ......................... 11.2 SWITCHES .......................................... 11.3 CONTROL LEVERS, PEDAL ............................ 11.4 STEERING COLUMN TILT LEVER ....................... 11.5 CAP WITH LOCK ..................................... 11.5.1 METHOD OF OPENING AND CLOSING CAP WITH LOCK 11.6 SAFETY BAR ........................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 . 2-4 : 2-6 ‘2-10 . 2-14 . 2-19 . 2-23 . 2-23 _ 2-23 . 2-24 O-6

11.7 TOWING PIN _ . _, . . . _. . _. _. . . . . . . . _. . . . . 11.8 GREASE PUMP CLAMP AND RUBBER RING _ . . . . 11.9 BACKUPALARM . . . . . _. . . . . . . _. . . . . 11.10 FUSE . . ..__.........._......._........... 11.10.1 FUSE CAPACIlY AND NAME OF CIRCUIT . . . . 11.11 SLOWBLOWFUSE . . . . . . . . . . . . . . . . . . . . . .._ 11 .I2 STORAGE PLACE FOR THIS MANUAL . . . . . . 11 .I3 AUXILIARY POWER SOURCE . . . . . . . . . _ . . . 11 .I 3.1 FOR MACHINES EQUIPPED WITH ROPS CAB . 12. CHECK BEFORE STARTING ENGINE .............. 12.1 WALK AROUND CHECK ...................... 12.2 CHECK BEFORE STARTING ................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -_- 12.2.1 CHECK COOLANT LEVEL, ADD COOLANT, . . . . . _ . . . . . . . . . . . . . 2-32 12.2.2 CHECK MONITOR PANEL . . . . . . . . . . _ . . . . . . _ . . . . _ . . _ . . . . . . . 2-32 12.2.3 CHECK FUEL LEVEL, ADD FUEL . _ . . . . . . . . . . . . . _ . . . . . . . . . . . 2-33 12.2.4 CHECK OIL LEVEL IN ENGINE OIL PAN, ADD OIL . . . _ . _ . _ . . . . . . . 2-33 12.25 CHECK AND REFILL OF OIL IN BRAKE OIL TANK . . . . . . . . . . . 2-34 12.2.6 CHECK DUST INDICATOR . . . _ . . . . . . . . . . . _ . . . . . . . _ . . . _ . . . 2-34 12.2.7 CHECK ELECTRICAL WIRING . . _ . . . . _ . . . . . . _ _ _ . . . _ . . _ . . . . . . . . . 2-35 12.2.8 DRAIN THE WATER FROM THE FUEL-WATER SEPARATOR _ . . . . . 2-36 12.2.9 CHECK EFFECT OF PARKING BRAKE _ . . _ . . _ . . . . _ . _ . _ 12.2.10CHECKEFFECTOFWHEELBRAKES.. .......................................... . 2-36 2-37 12.2.11 CHECK SOUND OF HORN AND BACKUP ALARM ................................... 2-37 12.2.12 CHECK FLASHING OF LAMPS, CHECK FOR DIRT AND DAMAGE ...................... 2-37 12.2.13 CHECK ENGINE EXHAUST COLOR AND SOUND ................................... 2-37 12.2.14 CHECK OPERATIONS OF GAUGES .............................................. 2-37 12.2.15 CHECK PLAY OF STEERING WHEEL, CHECK OPERATION OF STEERING .............. 2-37 12.2.16 CHECK DIRECTION OF REAR VIEW MIRROR, CHECK FOR DIRT OR DAMAGE .......... 237 12.2.17 CHECK LOCK OF CAB DOOR FOR MACHINES EQUIPPED WlTH CAB .................. 2-37 12.3 ADJUSTMENT BEFORE OPERATION ................................................ 2-38 12.3.1 OPERATOR’S SEAT ........................................................... 2-38 12.3.2 ADJUST SEAT BELT ........................................................... 240 12.3.3 ADJUST REAR VEIW MIRRORS .................................................. 241 12.4 OPERATlONS AND CHECKS BEFORE STARTING ENGINE .............................. 242 12.5 STARTING ENGINE ............................................................... 243 12.51 NORMAL STARTING PROCEDURES IN COLD AND WARM CONDITIONS ............... 243 12.52 STARTING PROCEDURES AFTER EXTENDED SHUTDOWN OR OIL CHANGE ........... 2-44 12.53 STARTING PROCEDURES AFTER CHANGING FUEL FILTERS ........................ 2-44 12.5.4 STARTING PROCEDURES AFTER RUNNING OUT OF FUEL .......................... 2-44 12.6 OPERATIONS AND CHECKS AFTER STARTING ENGINE ................................ 245 12.7 MOVING MACHINE OFF ........................................................... 246 12.8 CHANGINGGEARSPEED .......................................................... 248 12.9 CHANGING DIRECTION ........................................................... 248 12.10 TURNING ...................................................................... 249 12.11 STOPPING MACHINE ............................................................ 2-50 12.12 OPERATION OF WORK EQUIPMENT ............................................... 2-51 12.13 WORK POSSIBLE USING WHEEL LOADER .......................................... 2-52 12.13.1 DIGGING OPERATIONS WlTH ROCK PILES ............................ : ........... 2-52 12.13.2 DIGGING OPERATIONS ON LEVEL GROUND ...................................... 2-53 12.13.3 LEVELING OPERATION ........................................................ 2-54 12.13.4 PUSHING OPERATIONS ........................................................ 2-54 12.13.5 LOAD AND CARRY OPERATIONS ................................................ 2-54 12.13.6 LOADING OPERATIONS ........................................................ 2-55 12.14 PRECAUTIONS FOR OPERATION ................................................. 2-56 12.14.1 PERMISSIBLE WATER DEPTH ................................................... 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 2-24 2-25 2-26 2-26 2-27 2-28 2-28 2-28 2-29 2-29 232 o-7

12.14.2 IF WHEEL BRAKE DOES NOT WORK ................... 12.14.3 PRECAUTIONS WHEN DRIVING UP OR DOWN SLOPES ... 12.14.4 PRECAUTIONS WHEN DRIVING MACHINE .............. 12.15 ADJUSTING WORK EQUIPMENT POSTURE ............... 12.151 ADJUSTING BOOM KICKOUT ......................... 12.152 ADJUSTING BUCKET POSITIONER ..................... 12.15.3 BUCKET LEVEL INDICATOR .......................... 12.16 PARKING MACHINE ................................... 12.17 CHECKS AFTER COMPLETION OF ENGINE OPERATION .... 12.18 STOPPING ENGINE ................................... 12.19 CHECKS AFTER STOPPING ENGINE ..................... 12.20 LOCKING ............................................ 12.21 HANDLING THE TIRES ................................. 12.21.1 PRECAUTIONS WHEN HANDLING THE TIRES ........... 12.21.2 TIRE PRESSURE .................................... . . 2-56 . 2-56 . . 2-57 . . 2-58 . . 2-58 . . 2-59 . . 2-59 . . 2-60 . . 2-61 . . 2-61 . . 2-62 . . 2-62 . . 2-63 . . 2-63 . . 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13. TRANSPORTATlON ............................................... 13.1 LOADING, UNLOADING WORK ................................... 13.2 PRECAUTION FOR LOADING .................................. 13.3 .PRECAUTION FOR LIFTING UP THE VEHICLE ...................... 13.3.1 THE LOCATION OF DECALS REFERRING TO LlFTlNG POSITIONS . 13.3.2 WEIGHTLIST .............................................. 13.3.3 LIFTING PROCEDURE ...................................... . . 2-65 . . 2-65 . _ 2-66 . . 2-66 . . 2-67 . . 2-67 . . 2-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14. COLD WEATHER OPERATlONS _ . . . _ . _ _ . . . _ 14.1 PRECAUTIONS FOR LOWTEMPERATURE . . 14.1.1 FUEL AND LUBRICANTS . . . . . . . . . . . . . 14.1.2 COOLANT . . _ _ . . . . . . _ _ . _ . . . . . . _ _ . _ _ _ 14.1.3 BATTERY . . . . . . . . . _. . . . . . . . . . . . . . . . 14.2 PRECAUTIONS AFTER COMPLETION OF WORK 14.3 AFTER COLD WEATHER _ _ _ _ . . _ _ . _ . _ . . . . . . . . . . . . . . . . . . . . . . 2-69 . . . . 2-69 . . . . 2-69 . . . 2-69 . . 2-70 . . . . 2-71 . . . . 2-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15. LONG TERM STORAGE ............................... 15.1 BEFORE STORAGE ............................... 15.2 DURING STORAGE ............................... 15.3 AFTER STORAGE ................................ . . . . . . . . . . . . . . 2-72 . _ . 2-72 . . . 2-72 . _ . 2-72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16. TROUBLESHOOTING _ . . . . . _ _ . . . . _ _ . _ _ . . . . . . . . . . . . . 16.1 WHEN MACHINE RUNS OUT OF FUEL . . . _ . . . . _ _ . . . 16.2 TOWING THE MACHINE _ . _ . _ . . _ _ _ . . . . _ _ _ . . _ _ _ . . . 16.2.1 WHEN ENGINE CAN BE USED _ . . . . . _ . . . . . . . _ . 16.2.2 WHEN ENGINE CANNOT BE USED . . . . . . . . . _ . _ 16.3 IF BATTERY IS DISCHARGED . . . . . . . . . . _ . . . . . _ . . 16.3.1 REMOVAL AND INSTALLATION OF BATTERY . . . . 16.3.2 PRECAUTIONS FOR CHARGING BATTERY . . _ . . . 16.3.3 STARTING ENGINE WlTH BOOSTER CABLE . . . . . 16.4 OTHER TROUBLE _ _ . . . _ _ . . . . _ _ . . . . _ _ . _ . . . . . 16.4.1 ELECTRICAL SYSTEM . _ . . . . . . . . . . . . . . . . . . . 16.4.2 CHASSIS . . . . . _ . _ _ _ . _ . . . . . _ . _ . . _ . _ . . 16.4.3 ENGINE . . . _ _ . . . . . . _ . . . . _ _ . . . . _ . . . . . . . . . . . . . . . . . . . . . . . 2-73 . . 2-73 . . . 2-74 . . 2-76 . . 2-76 . . 2-77 . . . 2-77 . _ . 2-78 . . 2-79 . . 2-81 . . 2-81 . . . 2-82 . . . 2-85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . MAINTENANCE 17. GUIDES TO MAINTENANCE . . _ . . . . . . . . . . . . _ _ _ _ . . _ . . . . . . . . . . . . . . _ . . . _ . _ . . . . . 3-2 18. OUTLINES OF SERVICE . . . . _ . . . . . . . _ . . . . . _ . _ . . . _ . . . _ . . _ . _ . . _ _ . . . . . . , 3-5 O-8

INTRODUCTION 18.1 OUTLINE OF OIL, FUEL, COOLANT . 18.1.1 OIL . . . . . . . . . . . . . . . . . . . . 18.12 FUEL.. . _. . . . ._ . . . . . _. . _. 18.1.3 COOLANT . . . _. . . . . . . . . . _. 18.1.4 GREASE.. . . . . . . . . . . . . . . . 18.1.5 STORING OIL AND FUEL . . . 18.1.6 FILTERS . . . . . . ._. . . . . . 18.2 OUTLINE OF ELECTRIC SYSTEM _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 . . . . . 3-5 . I . . 3-6 . . . 3-6 . . . . . 3-7 . . . . . 3-7 . . . . 3-7 . . . . 3-8 19_WEARPARTSLlST.................................................................... 3-9 20. USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE . . . .... 3-10 20.1 ENGINE OIL SPECIFICATIONS _ . . . . . . . . . . . _ . . _ _ _ . . . _ . _ _ . . _ . . . , . . . . . _ . . . . . . . .... 3-l 1 20.2 DIESEL FUEL SPECIFICATIONS . . . . . . . . . _ . . . . . . . . _ . . . _ . . . . . . . . . . . . _ . . . .... 3-12 20.3 COOLANT SPECIFICATIONS . . . . . . . . . . . . . . _ _ . . . . . . _ _ . _ . . _ . . . . . . . . _ . . . . . _ _ , . . .... 3-13 21. STANDARD TIGHTENING TORQUE FOR BOLTS AND NUTS ................................ 3-19 21.1 INTRODUCTION OF NECESSARY TOOLS ............................................ 3-19 21.2 TORQUE LIST .................................................................... 3-20 22. PERIODIC REPLACEMENT OF SAFE-I-Y CRITICAL PARTS .................................. 3-22 23. MAINTENANCE SCHEDULE CHART ..................................................... 3-26 23.1 MAINTENANCE SCHEDULE CHART ................................................. 3-26 24. SERVICE PROCEDURES .............................................................. 3-30 24.1 INITIAL 250 HOURS SERVICE ...................................................... 530 24.1.1 REPLACE FUEL FILTERS ....................................................... 3-30 24.1.2 REPLACE TRANSMISSION OIL FILTER ELEMENT ................................. _’ 3-30 24.1.3 REPLACE HYDRAULIC TANK FILTER ELEMENT .................................... 3-30 24.2 WHEN REQUIRED ................................................................ 3-31 24.2.1 CHECK, CLEAN OR REPLACE AIR CLEANER ELEMENT ............................. 3-31 24.2.2 CHECK TRANSMISSION OIL LEVEL, ADD OIL ...................................... 3-33 24.2.3 CHECKAXLE OIL LEVEL, ADD OIL ............................................... 3-34 24.2.4 CLEAN THE AXLE CASE BREATHER ............................................. 3-35 24.2.5 CLEAN RADIATOR FINS ........................................................ 3-35 24.2.6 REPLACE THE BOLT-ON CUTIING EDGES ........................................ 3-36 24.2.7 REPLACE BUCKET TEETH (IF EQUIPPED) ........................................ 3-37 24.2.8 CHECK AIR CONDITIONER (IF EQUIPPED) ........................................ 3-38 24.2.9 CHECK THE AIR CONDITIONER CONDENSER (IF EQUIPPED) ........................ 3-39 24.2.10 CHECK WINDOW WASHING FLUID ............................................... 3-39 24.2.11 ADJUST PARKING BRAKE ...................................................... 3-40 24.2.12 REPLACE SLOW BLOW FUSE ................................................... 3-41 24.2.13 CHECK AIR INTAKE HEATER. ................................................... 3-41 24.3 CHECK BEFORE STARTING ........................................................ 3-42 24.4 EVERY 50 HOURS SERVICE ....................................................... 343 24.4.1 CHECK THE TIRE INFLATION PRESSURE ......................................... 343 24.4.2 DRAIN WATER, SEDIMENT FROM FUEL TANK ..................................... 343 24.5 EVERY 100 HOURS SERVICE ...................................................... 3-44 24.5.1 CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL .................................. 3-44 24.5.2 CLEAN ELEMENT IN AIR CONDITIONER FRESH AIR FILTER ......................... 345 24.5.3 LUBRICATING ................................................................ 346 24.6 EVERY 250 HOURS SERVICE ...................................................... 347 24.6.1 CHANGE OIL IN ENGINE OIL PAN AND REPLACE ENGINE OIL FILTER ................. 347 24.6.2 CHECK FOR LOOSE WHEEL HUB NUTS. TIGHTEN ................................. 348 24.6.3 CLEAN ELEMENT IN AIR CONDITIONER RECIRCULATION FILTER .................... 3-48 o-9

KOMATSU WA250-3 Wheel Loader Operation & Maintenance Manual (S/N: 53001 and up)

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