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Avance plus WA450-3 Operation & Maintenance Manual

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This material is proprietary to Komatsu 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.
FEB 1999
WA450 3 -
WHEEL LOADER
SERIAL NUMBERS WA450-3MC - A31001 and up
Copyright 1999 Komatsu America International Company
CEAM003800

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  • Page 1 CEAM003800 WA450 3 - WHEEL LOADER SERIAL NUMBERS WA450-3MC - A31001 and up This material is proprietary to Komatsu 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.
  • Page 2 PRODUCT PUBLICATIONS INFORMATION VARIOUS PRODUCT PARTS & SERVICE PUBLICATIONS ARE AVAILABLE TO ALL KOMATSU CONSTRUCTION EQUIPMENT OWNERS, INCLUDING OPERATION AND MAINTENANCE MANUALS, PARTS BOOKS AND SHOP MANUALS. SPECIAL PUBLICATIONS SUCH AS SERVICE TOOL, AIR CONDITIONING, AND TURBOCHARGER SERVICE MANUALS ARE ALSO AVAILABLE AS WELL AS SELECTED OPERATION & SERVICE 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. SHIP TO ATTN.
  • Page 4 INTRODUCTION WA450-3MC...

  • Page 5: Foreword

    INTRODUCTION FOREWORD This manual describes the procedures for the operation, handling, lubrication, maintenance, checking, and adjustment. The manual 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 becomes lost or illegible, request a replacement manual from your local distributor.

  • Page 6: Safety Information

    INTRODUCTION SAFETY INFORMATION Most accidents are caused by the failure to follow fundamental safety rules for the operation and maintenance of the machines. To avoid accidents, read and follow all precautions and warnings in this manual and on the machine before performing maintenance and machine operations.

  • Page 7: Intended Use

    INTRODUCTION INTRODUCTION INTENDED USE This WHEEL LOADER is designed to be used mainly for the following work: Digging Leveling Pushing Loading For details of the operating procedures, see 12.10 WORK POSSIBLE USING WHEEL LOADER on page 2-64. FEATURES Curved glass and improved sealing for reduced noise, low vibration cab, viscous mount. Console and steering post with unencumbered foot area providing the same comfortable feeling as in a n automobile.

  • Page 8: Location Of Plates, Table To Enter Serial No. And Distributor

    INTRODUCTION LOCATION OF PLATES, TABLE TO ENTER SERIAL NO. AN D DISTRIBUTOR MACHINE SERIAL NO. PLATE POSITION 4.1.1 POSITION OF PLATE (A) On the center right of the front frame. 4.1.2 POSITION OF STAMP (B) This is stamped on the center of the front frame on the right hand side of the machine.
  • Page 9 INTRODUCTION REMARKS WA450-3MC...

  • Page 10: Table Of Contents

    INTRODUCTION TABLE OF CONTENTS 1. FOREWORD ................0 -2 2.
  • Page 11 INTRODUCTION 12.1.1 WALK AROUND CHECK ............2-35 12.1.2 CHECK BEFORE STARTING .
  • Page 12 INTRODUCTION 15.2 DURING STORAGE ............. . .2-83 15.3 AFTER STORAGE .
  • Page 13 INTRODUCTION 24. INITIAL 250 HOURS SERVICE .............3-28 24.1 INITIAL 250 HOURS SERVICE .
  • Page 14 INTRODUCTION 25.1 GENERAL ............... . 4 -2 26.
  • Page 15 INTRODUCTION 0-12 WA450-3MC...
  • Page 16 WA450-3MC...
  • Page 17 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. WA450-3MC...

  • Page 18: General Precautions

    WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY GENERAL PRECAUTIONS SAFETY RULES ONLY trained and authorized personnel should be allowed to operate and service this machine. Follow all safety rules, precautions and instructions when operating or performing maintenance on the machine.
  • Page 19 WARNING: For reasons of safety, always follow these safety precautions. SAFETY CLOTHING AND PERSONAL PROTECTIVE ITEMS Avoid loose clothing and long hair, and jewlery. 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. Wear a hard hat, safety glasses, safety shoes, mask or gloves when operating or maintaining the machine.
  • Page 20 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY MOUNTING AND DISMOUNTING Climbing on the machine improperly can cause injury. 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.
  • Page 21 WARNING: For reasons of safety, always follow these safety precautions. SAFETY PRECAUTIONS WHEN HANDLING AT HIGH TEMPERATURES Engine coolant, engine oil, and hydraulic oil can reach high temperatures, and are under pressure during operation. Attempting to remove the cap, drain the oil or water, or replace the filters may lead to serious burns.
  • Page 22 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY FIRE EXTINGUISHER AND FIRST AID KIT Make sure fire extinguishers of the correct type are kept in good condition and convenient to the operators and other personnel. Make sure the appropriate personnel have been trained in their use. Provide a first aid kit at the storage point.
  • Page 23 WARNING: For reasons of safety, always follow these safety precautions. SAFETY PRECAUTIONS WHEN HANDLING ACCUMULATOR If the travel damper switch is turned ON when the machine is traveling or when the work equipment is raised, the hydraulic accumulator in the travel damper will instantaneously be connected with the lift cylinder bottom circuit.

  • Page 24: Precautions During Operation

    WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PRECAUTIONS DURING OPERATION BEFORE STARTING ENGINE CHECKS BEFORE STARTING ENGINE Carry out the following checks before starting the engine at the beginning of the work shift. Failure to carry out the checks may lead to serious injury or damage.

  • Page 25: Operating Machine

    WARNING: For reasons of safety, always follow these safety precautions. SAFETY OPERATING MACHINE WHEN STARTING ENGINE Walk around your machine again just before mounting it, and check for people and objects that might be in the way. Never start the engine if a warning tag has been attached to a control lever (1). When starting the engine, sound the horn to alert nearby personnel.
  • Page 26 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PRECAUTIONS WHEN STARTING TO MOVE Before starting to move, check again that there is no one in the surrounding area and that there are no obstacles. When starting, sound the horn to alert nearby personnel.
  • Page 27 WARNING: For reasons of safety, always follow these safety precautions. SAFETY PRECAUTIONS WHEN TRAVELING Never turn the key to the OFF position in the starting switch when traveling. It is dangerous if the engine stops when the machine is traveling, because the steering becomes heavy. If the engine stops, apply the brake immediately to stop the machine.
  • Page 28 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY TRAVELING ON SLOPES Traveling on a slope can allow the machine to tip over or slip to the side. When traveling on slopes, keep the bucket approximately 20 - 30 cm (8-12 in.) above the ground. In case of emergency, quickly lower the bucket to the ground to help the machine stop.
  • Page 29 WARNING: For reasons of safety, always follow these safety precautions. SAFETY PRECAUTIONS WHEN OPERATING 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. The load suddenly becomes lighter when a load is pushed over a cliff or when the machine reaches the top of a slope.
  • Page 30 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES Going close to high-voltage cables can cause electrical shock. Always maintain the safe distance given below between the machine and the electric cable. The following actions are effective in preventing accidents: 1) Wear shoes with rubber or leather soles.
  • Page 31 WARNING: For reasons of safety, always follow these safety precautions. SAFETY OPERATE CAREFULLY ON SNOW When working on snow or icy roads, even a slight slope may cause the machine to slip to the side, so always travel at low speed and avoid sudden starting, stopping, or turning. After a heavy snowfall, the road shoulder and objects placed beside the road are buried in the snow and cannot be seen, so always carry out snow-clearing operations carefully.
  • Page 32 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PARKING THE MACHINE Park on level ground where danger of falling rocks, flooding and/or landslides is minimal. If the machine must be parked on a slope, block the wheels to prevent the machine from moving. Then dig the work equipment into the ground.
  • Page 33 WARNING: For reasons of safety, always follow these safety precautions. SAFETY PRECAUTIONS IN COLD AREAS After completing operations, remove all water, snow or mud from the wiring harness connectors and/or sensors. Cover these parts. If the water freezes, it will cause malfunctions when the machine is used, which may lead to accidents. Warm up the machine thoroughly.

  • Page 34: Transportation

    WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY TRANSPORTATION LOADING AND UNLOADING Loading and unloading the machine always involves potential hazards. EXTREME CAUTION SHOULD BE USED. When loading or unloading the machine, run the engine at low idling and travel at low speed. Perform loading and unloading on firm, level ground only.

  • Page 35: Battery

    WARNING: For reasons of safety, always follow these safety precautions. SAFETY BATTERY BATTERY HAZARD PREVENTION Battery electrolyte contains sulfuric acid and can quickly burn the skin and eat holes in clothing. If you spill acid on yourself, immediately flush the area with water. Battery acid could cause blindness if splashed into the eyes.
  • Page 36 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY CHARGING BATTERY The battery can explode if handled incorrectly during charging. Be sure to heed the following and check safety information supplied by the battery charger manufacturer. Remove the battery caps to disperse hydrogen gas and charge in a well-ventilated area.

  • Page 37: Towing

    WARNING: For reasons of safety, always follow these safety precautions. SAFETY TOWING WHEN TOWING Towing incorrectly may lead to serious personal injury or damage. Make sure all workers involved with the towing agree on signals before starting. If the problem machine’ s engine will not start or has a failure in its brake system, contact your Komatsu distributor for repairs.

  • Page 38: Precautions For Maintenance

    WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PRECAUTIONS FOR MAINTENANCE BEFORE CARRYING OUT MAINTENANCE NOTIFICATION OF FAILURE Carrying out maintenance not described in the Komatsu operation and maintenance manual my lead to unexpected failures. Contact your Komatsu distributor for repairs. WARNING TAG If others start the engine or operate the controls while you are performing service or lubrication, you could suffer serious injury or death.
  • Page 39 WARNING: For reasons of safety, always follow these safety precautions. SAFETY CLEAN BEFORE INSPECTION AND MAINTENANCE Clean the machine before inspection and maintenance so that Procedures can be carried out safely without entry by dirt into the machine. Problem areas are less likely to be obscured by mud and debris. Chances of personal injury from falls or flying debris are lessened.
  • Page 40 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY RADIATOR COOLANT LEVEL When inspecting the radiator coolant level, stop the engine and allow the temperature to subside. Check the coolant level in the sub-tank. Under normal conditions, do not open the radiator cap. If there is no sub-tank, or if the radiator must be removed: Wait for the radiator temperature to go down before checking the coolant level.
  • Page 41 WARNING: For reasons of safety, always follow these safety precautions. SAFETY STOP THE ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE Always stop the machine on firm flat ground and stop the engine before performing the inspection and maintenance. If it is necessary to run the engine when carrying out maintenance, such as when cleaning the inside of the radiator, place the safety lock lever in the LOCK position and carry out the operation with two workers.
  • Page 42 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY PROPER TOOLS Use only tools suited to the task. Using damaged, low quality, faulty, or makeshift tools could cause personal injury. Tools PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS Replace the following safety-related and fire-related components periodically: Fuel system: Fuel hose, spilling hose, and fuel tube cap Hydraulic system: Pump outlet hose, and front and rear pump branch hoses...

  • Page 43: During Maintenance

    WARNING: For reasons of safety, always follow these safety precautions. SAFETY DURING MAINTENANCE PERSONNEL Only authorized personnel can service and repair the machine. Extra precaution should be used when grinding, welding, and/or using a sledge-hammer. ATTACHMENTS Place attachments that have been removed from the machine in a safe place so that they do not fall.
  • Page 44 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY KEEP THE MACHINE CLEAN Spilled oil or grease, or scattered tools or broken pieces are dangerous because they may cause you to slip or trip. Always keep your machine clean and tidy. If water gets into the electrical system, there is danger that the machine may not move or may move unexpectedly.
  • Page 45 WARNING: For reasons of safety, always follow these safety precautions. SAFETY HANDLING HIGH-PRESSURE HOSES Do not bend high-pressure hoses or hit them with hard objects. Do not use any bent or cracked piping, tubes or hoses. They may burst during use. Always repair any loose or broken fuel hoses or oil hoses.
  • Page 46 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY ROTATING FAN AND BELT Keep away from rotating parts and be careful not to let anything get caught in them. If your body or tools touch the fan blades or fan belt, they may be cut off or sent flying, so never touch any rotating parts.
  • Page 47 WARNING: For reasons of safety, always follow these safety precautions. SAFETY WASTE MATERIALS Never dump waste oil in a sewer system, rivers, etc. Always put oil drained from your machine in containers. Never drain oil directly on the ground. Obey appropriate laws and regulations when disposing of harmful objects such as oil, fuel, coolant, solvent, filters, batteries, and others.

  • Page 48: Tires

    WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY TIRES HANDLING TIRES If tires are not used under the specified conditions, they may overheat and burst or be damaged by sharp stones on rough road surfaces. This may lead to serious injury or damage. To maintain safety, always keep the following conditions.
  • Page 49 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 50 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY 1. Precautions before starting. 3. Precautions when traveling in reverse. 2. Precautions for safety lock lever. 4. Precautions for parking brake. Part number 419-93-A1410 includes safety labels 1-3; part number 419-93-A1421 identifies safety label 4. WA450-3MC 1-35...
  • Page 51 WARNING: For reasons of safety, always follow these safety precautions. SAFETY 5. Do not enter. 7. Precautions for high temperature coolant. 8. Precautions when oil is at high temperature. 6. Precautions for safety bar. 9. Precautions when handling battery cable. Part number 421-93-21311 includes safety labels 5-9.
  • Page 52 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY 10. Precautions when using booster cables (419-93- AZ130). 11. High pressure warning. 12. Do not climb on fender. 13. Do not go under work equipment. WA450-3MC 1-37...
  • Page 53 WARNING: For reasons of safety, always follow these safety precautions. SAFETY 14. Do not open when engine is running. 15. Do not come near machine. 16. Precautions for back-up alarm (417-931-A180). POSITIONS FOR ATTACHING SAFETY LABELS Keep these labels clean. If they are lost or damaged, replace with a new label. Safety labels may be available i n languages besides English.
  • Page 54 WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY WA450-3MC 1-39...
  • Page 55 WARNING: For reasons of safety, always follow these safety precautions. SAFETY 1-40 WA450-3MC...
  • Page 56 WA450-3MC...
  • Page 57 OPERATION WA450-3MC...

  • Page 58: General View

    OPERATION 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. WA450-3MC...

  • Page 59: General View Of Controls And Gauges

    OPERATION 10.2 GENERAL VIEW OF CONTROLS AND GAUGES WA450-3MC...

  • Page 60: Component Explanation

    OPERATION COMPONENT EXPLANATION The following is an explanation of the devices needed for operating the machine. To perform suitable operations correctly and safely, it is important to fully understand the methods of operating th e equipment and the meanings of the displays. 11.1 MACHINE MONITOR The machine monitor system consists of the main monitor, which is in front of the operator's seat, and the maintenance...
  • Page 61 OPERATION OPTION DISPLAY PORTION (F) (11.1.3) This consists of the monitor lamps and switches for the emergency steering system, and ECSS. For details of each system or component, see OPTIONS, ATTACHMENTS. TESTING ACTUATION OF MACHINE MONITOR SYSTEM When the starting switch is turned to the ON position before starting the engine, all monitor lamps, gauges an d centralized warning lamps will light up for approximately 3 seconds, and the alarm buzzer will sound for about 1 second.

  • Page 62: Warning Displays

    OPERATION 11.1.1 WARNING DISPLAYS 1. CENTRAL CHECK LAMP WARNING If this monitor flashes, perform an 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 63 OPERATION 2. CENTRAL CAUTION LAMP WARNING If these monitor lamps flash, stop the engine immediately or run it low idle. If there is abnormality in any CAUTION item when the engine i s running (engine water temperature, torque converter oil temperature, engine water level, brake oil pressure, engine oi l pressure), the alarm buzzer will sound intermittently and the monitor lamp for the location of the abnormality will flash and the...
  • Page 64 OPERATION ENGINE OIL LEVEL CAUTION PILOT LAMP This lamp warns the operator that the oil level in the oil pan ha s dropped. When performing checks before starting: If the oil level in the engine oil pan is low, the caution pilot lam p and central CHECK lamp will flash.
  • Page 65 OPERATION 7. BATTERY CHARGE CAUTION PILOT LAMP This lamp warns the operator that a malfunction in the charging system exists when the engine is running. Check before starting: Lights up Engine started or running: When the engine is started, the alternator generates electricity and the lamp goes out.
  • Page 68 OPERATION 6. TURN SIGNAL PILOT LAMP When the turn signal lamp flashes, the pilot lamp also flashes. 7. HIGH BEAM PILOT LAMP This lamp is lit when the high beam lamp is on. 8. FUEL GAUGE This gauge indicates the amount of fuel in the tank. E = an empty tank F = a full tank The lamp should light up in the green range during operation.
  • Page 69 OPERATION 10. TORQUE CONVERTER OIL TEMPERATURE GAUGE This gauge indicates the torque converter oil temperature. If th e temperature is normal during operation, the green range will light. If the red range lights during operation, stop the machine and run the engine with no load at midrange speed until the green range lights.
  • Page 70 OPERATION 14. PREHEATING PILOT LAMP This lamp informs the operator that the glow plug is heated. Turning the start switch to the ON position lights up this lamp, and the light goes out when the preheating is completed. The length of time that the light remains on depends on the engine wate r temperature when the engine is started.

  • Page 71: 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 removed at this position. When the key is turned to this position, the electric circuit is turned off an d the engine stops.
  • Page 72 OPERATION 2. TRANSMISSION CUT-OFF SWITCH WARNING If the machine has to be started on a slope, always turn the transmission cut-off switch to OFF and depress the left brake pedal. To start the machine moving slowly, depress the accelerator pedal while releasing the left brake pedal.
  • Page 73 OPERATION 4. REAR WORKING LAMP SWITCH WARNING Always turn the working lamp off before traveling on public roads. When turning on the rear working lamp, turn the lamp switch to the ON position for the side cleara nce lamp, or the ON position for the head lamp.
  • Page 74 OPERATION TURN SIGNAL LEVER This lever operates the turn signal lamps. (1) LEFT TURN: Pull the lever FORWARD. (2) RIGHT TURN: Push the lever BACK. REMARKS: Operating the lever also turns the signal pilot lamp on. Turning the steering wheel to the neutral position, the turn signal lever will automatically return t o the OFF position.
  • Page 75 OPERATION 8. HAZARD LAMP SWITCH WARNING Use the hazard lamps only in emergencies. Using the hazard lamps when traveling will confuse the other operators. This switch is used in emergencies, such as when the machin e breaks down. ON: All turn signal lamps flash. REMARKS When this switch is turned to the ON position, the turn indicato r lamps and turn indicator pilot lamp flash.
  • Page 76 OPERATION 11. FRONT WIPER SWITCH Turn the switch (A) to operate the front wiper. Pressing button (B) sprays the washer fluid out and onto the front glass. 12. REAR WIPER SWITCH Turn the lever © to operate the rear wiper. 13.
  • Page 77 OPERATION 14. ROOM LAMP SWITCH This switch turns on the room lamp. ON: lights up. Position 1: OFF Position 2: Lights up when the cab door is opened Position 3: Lights up REMARKS The room lamp lights up even when the main switch is OFF. So when leaving the operator's compartment, turn the switch to position 1 or 2.
  • Page 78 OPERATION 16. REAR DEFROSTER SWITCH 1. Turn the starting switch to the ON position. 2. Turn the defroster switch (1) ON and it will automatically set the switch timer on for 10 minutes. 2-22 WA450-3MC...

  • Page 79: Control Levers, Pedals

    OPERATION 11.3 CONTROL LEVERS, PEDALS 1. SPEED CONTROL LEVER MANUAL SHIFT This lever controls the travel speed of the machine. This machine has a transmission with four forward speeds and four reverse speeds. Place the speed control lever in a suitable position to obtai n the desired speed range: 1st and 2nd speeds are used fo r working;...
  • Page 80 OPERATION REMARKS The length of the lever can be adjusted to 3 stages (position A, B, C). To adjust the length, remove the screw at the bottom of the lever knob and slide the knob to the desired position. Tighten the screw again.
  • Page 81 OPERATION The hold switch maintains the same transmission gear. Recommended for use when traveling up or down a slope. 2. DIRECTIONAL LEVER This lever changes the machine’ s direction of travel. The engine cannot be started if the directional lever is not i n neutral.
  • Page 82 OPERATION 4. SAFETY LOCK LEVER WARNING When leaving the operator’ s compartment, set the safety lock lever securely to the LOCK position. If the control levers are not locked, and they are touched by mistake, a serious accident could result. If the safety lock lever is not placed securely in the LOCK position, the control levers may not be properly locked.
  • Page 83 OPERATION 6. LIFT-ARM CONTROL LEVER This lever operates the boom. (1) RAISE ( When the lift arm control lever is pulled further from the RAISE position, the lever is stopped in this position until th e lift arm reaches the preset position of the kick-out, and the lever is returned to the HOLD position.

  • Page 84: Steering Column Tilt Lever

    OPERATION 7. BRAKE PEDALS WARNING When traveling downhill, use the engine as a brake and always use the right brake pedal. Do not use the brake pedals repeatedly, unless necessary. Do not put your foot on this pedal, unless necessary. Right brake pedal The right brake pedal operates the wheel brakes and used for normal braking.

  • Page 85: Cap With Lock

    OPERATION 11.5 CAP WITH LOCK The fuel tank filler port and the hydraulic tank filler port ar e equipped with locks. Use the starter key to open and close the cap as follows: 11.5.1 METHOD OF OPENING AND CLOSING THE CAP WITH LOCK TO OPEN THE CAP (fuel tank filler port) 1.

  • Page 86: 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. The safety bar locks the front and rear frames, preventing them from pivoting.

  • Page 87: Grease Pump

    OPERATION 11.8 GREASE PUMP The grease pump is stored insi d e the battery box, which is located on the rear, left side of the machine. After using the pump, wipe off all the grease stuck to the outside of the pump and then store it in the box.

  • Page 88: Fuse

    OPERATION 11.10 FUSE NOTE: Before replacing a fuse, turn the starting switch off. The fuses protect the electrical equipment and wiring from burning out. If a fuse becomes corroded, has white powder on it, or loose in its holder, replace the fuse. 11.10.1 FUSE CAPACITY AND CIRCUIT NAME Fuse box I Fuse...

  • Page 89: Slow-Blow Fuse

    OPERATION Fuse box II Fuse Name of circuit capacity Front working lamp Rear working lamp Air conditioner Air conditioner Wiper, washer Auto shift Cigarette lighter, radio Rotating lamp Fuel shutoff solenoid Spare Spare Spare Spare Air suspension seat Defroster 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.

  • Page 90: Manual Storage Place

    OPERATION 11.12 MANUAL STORAGE PLACE Keep this manual in the rear pocket (1) of the operator’ s seat so that the manual is readily available. 11.13 ELECTRIC POWER (with ROPS CAB) Removing the cigarette lighter (1) allows an electrical device to be plugged in.

  • Page 91: Checks Before Starting

    OPERATION OPERATION 12.1 CHECKS BEFORE STARTING 12.1.1 WALK AROUND CHECK WARNING Leakage of oil or fuel, or accumulation of flammable material around high temperature parts, such as the engine muffler or turbocharger, may cause a fire. If any abnormality is found, repair it or contact your distributor for assistance.
  • Page 92 OPERATION 2. Remove dirt and dust from around the engine, battery, radiator. Check if there is any dirt accumulation around the engine or radiator. Check also i f there is any flammable material (dead leaves, twigs, grass, etc.) accumulated around the battery or high-temperature engine parts, such as the muffler or turbocharger.
  • Page 93 OPERATION 11. Check the seat belt WARNING Although a seat belt may appear undamaged, replace it every three years. The date of manufacture of the seat belt is marked on the belt. Check that there are no loose bolts on the equipment mounting the seat belt to the machine, and tighten, if necessary.
  • Page 94 OPERATION 14. Tire Inspection WARNING If worn or damaged tires are used, they may burst and cause serious injury or death. When the tires show the following wear or damage, replace them: Wear: Tires with a tread groove of less than 15% of that of a new tire.

  • Page 95: Check Before Starting

    OPERATION 12.1.2 CHECK BEFORE STARTING 1. Turn the start switch ON. 2. Check that all the monitor lamps, the gauges, and the warning lamp light up for about 3 seconds while the alarm buzzer sounds for 1 second. Do not perform the checks using just the monitor; always perform the items specified for the periodic maintenance.
  • Page 96 OPERATION CHECK THE FUEL LEVEL WARNING When adding fuel, never let the fuel overflow or a fire could result. Clean up any fuel spills immediately. 1. Turn the engine starting switch to the ON position, the n check the fuel level on the fuel gauge (G). After checking the fuel level, return the starting switch to the OF F position.
  • Page 97 OPERATION CHECK THE ENGINE OIL LEVEL 1. Open the engine side cover at the right rear side of th e machine. 2. Remove the dipstick (G) and wipe off the oil with a clean cloth. 3. Reinsert the dipstick (G) fully in the tube, and then remove the dipstick again.
  • Page 98 OPERATION CHECK THE ELECTRICAL WIRING WARNING Frequently blown fuses, or if there are signs of arcing, indicate an electrical short circuit may be the cause. Locate the cause and repair it. Accumulation of all flammable material (dead leaves, twigs, grass, etc.) around the battery may cause fire, so always remove such material.
  • Page 99 OPERATION CHECK THE PARKING BRAKE WARNING Even if the parking brake switch is turned ON, keep the brake pedal depressed until the parking brake pilot lamp lights up. Measurement conditions Tire inflation pressure: Specified pressure Road surface: Dry paved surface with 1/ 5 (11 Machine: Operating condition Method of measurement...
  • Page 100 OPERATION CHECK TIRE INFLATION PRESSURE Using a tire pressure gauge, measure the pressure of all tires before starting work each day. Check the tires and rims for wear and damage. Check for loose wheel hub nuts (bolts). The proper tire inflation pressure is shown below. Tire Size Inflation pressure 23.5-25-20PR (L3 rock) standard...

  • Page 101: Adjustment Before Operation

    OPERATION 12.1.3 ADJUSTMENT BEFORE OPERATION ADJUSTING 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 102 OPERATION AIR RIDE SUSPENSION SEAT The optional Air Ride Seat includes a suspension system fo r added comfort over uneven terrain. A built-in air compressor provides the cusion of air in the seat. Controls resemble those of the standard seat, but with a few exceptions. (1) Forward-backward adjustment Pull the lever (1) to release the seat and then slide the seat to a position that provides comfort and accessibility to th e...
  • Page 103 OPERATION ADJUST THE 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 belt mounting. If the belt is worn or damaged, replace it. Always fasten the seat belt before starting operations.

  • Page 104: Operations And Checks Before Starting Engine

    OPERATION 12.1.4 OPERATIONS AND CHECKS BEFORE STARTING ENGINE WARNING Accidentally touching the control levers can cause the work equipment to move suddenly. When leaving the operator’ s compartment, always set the safety lever securely to the LOCK position. Before starting the engine, wipe off the dust atop the battery or on the starting motor and alternator with a damp cloth.
  • Page 105 OPERATION 3. After lowering the bucket to the ground, check that the work equipment control lever (3) is locked by the safety lock (4). 4. Insert the key in the start switch (5), a nd turn the key to the ON position.

  • Page 106: Starting The Engine

    OPERATION 12.2 STARTING THE ENGINE WARNING After checking that there are no persons or obstacles in the surrounding area, sound the hound and then start the engine. NOTE: Do not keep the starting motor rotating continuously for more than 20 seconds. If the engine will not start, wait for at least 2 minutes before trying to start the engine again.

  • Page 107: Cold Weather Starting

    OPERATION 12.2.1 COLD WEATHER STARTING 1. Turn the key in the start switch to the ON position. The preheating pilot light on the dash comes on, indicating that the preheating process is activated. The table at the right indicates that the preheating time varies , depending on the engine water temperature.

  • Page 108: Operations And Checks After Starting The Engine

    OPERATION 12.3 OPERATIONS CHECKS AFTER STARTING THE ENGINE STARTING THE ENGINE After starting the engine , do not immediately start operations. First, perform the following operations and checks. NOTE 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 20 minutes.
  • Page 109 OPERATION 3. After performing the warm-up operation, check that the gauges and caution lamps are normal. If any defect exists, repair it. 4. Run the engine under a light load until the engine wate r temperature gauge (2) and the torque converter oil gauge (3) are in the green range.

  • Page 110: Moving The Machine

    OPERATION 12.4 MOVING THE MACHINE WARNING When moving the machine, check that the area around the machine is safe, then sound the horn before starting the engine. Do not allow people near the machine. A blind spot exists behind the machine, so be particularly careful when traveling in reverse.
  • Page 111 OPERATION 3. Operate the lift arm control lever (6) to set the work equipment to the travel mode. 4. Depress the right brake pedal (8) and turn the parking switch (9) to the OFF position to release the parking brake. If the parking brake remains actuated when the parking brake switch (9) is in the OFF position, turn the parking brake O N and then OFF again.

  • Page 112: Changing Gear Speed

    OPERATION 12.5 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 gears as follows: Move the speed control lever (1) to the desired position. Only 1st or 2nd speeds are used for digging and loadin g operations, so actuate the speed control lever stopper.

  • Page 113: Changing Direction

    OPERATION 12.6 CHANGING DIRECTION WARNING When changing direction between FORWARD and REVERSE, check that the new direction of travel is safe. There is a blind spot behind the machine, so be particularly careful when changing direction to travel in reverse. Do not switch FORWARD and REVERSE, when traveling at high speed.

  • Page 114: Turning

    OPERATION 12.7 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. This situation is particularly dangerous on hills, so never stop the engine while the machine is traveling.

  • Page 115: Stopping The Machine

    OPERATION 12.8 STOPPING THE MACHINE WARNING Avoid stopping suddenly. Allow ample room when stopping. Do not park the machine on the 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 116: Work Equipment Operation

    OPERATION 12.9 WORK EQUIPMENT OPERATION 12.9.1 STANDARD WORK EQUIPMENT CONTROLS The lift arm control lever (1) and the bucket control lever (2) can be used to operate the lift arm and bucket as follows. LIFT ARM OPERATION (LEVER (1)) (1) RAISE ( (2) HOLD ( The lift arm is kept in the same position.

  • Page 117: Mono-Lever Work Equipment Controls

    OPERATION When the bucket control lever is pulled further from the tilt position, the lever is stopped in this position until the bucke t reaches the preset position of the positioner, and the lever i s returned to the hold position. 12.9.2 MONO-LEVER WORK EQUIPMENT CONTROLS With the optional mono-lever controls, the work equipment lever (1) can be used to operate the lift arm and bucket as follows.
  • Page 118 OPERATION BUCKET OPERATION (LEVER) (1) TILT ( (2) HOLD ( The bucket is kept in the same position. (3) DUMP ( When the bucket control lever is pulled further from the tilt position, the lever is stopped in this position until the bucke t reaches the preset position of the positioner, and the lever i s returned to the hold position.

  • Page 119: Work Possible Using A Wheel Loader

    OPERATION 12.10 WORK POSSIBLE USING A WHEEL LOADER Using various a ttachments increases the range of applications, in addition to the following: WARNING Always set the machine facing directly to the front when carrying out digging or scooping operations. Never perform these operations with the machine articulated.
  • Page 120 OPERATION 3. When the material is in a stockpile, keep the cutting edge of the bucket horizontal; when loading blasted rock, have th e bucket tilted slightly down. Be careful not to get blasted rock under the bucket, or the front tires will come off the ground and slip.
  • Page 121 OPERATION When digging and loading on level ground, set the bucket edg e face down slightly and drive the machine forward. Always b e careful not to load the bucket on one side, causing an unbalanced load. Perform this operation in first gear. 1.

  • Page 122: Leveling Operations

    OPERATION 12.10.2 LEVELING OPERATIONS NOTE Always operate the machine in reverse when performing leveling operations. If it is necessary to perform the leveling operations when traveling forward, do not set the bucket dumping angle to more than 20 1. Scoop the soil into the bucket. Move the machine backward while spreading the soil from the bucket, little by little.

  • Page 123: Loading Operations

    OPERATION 12.10.5 LOADING OPERATIONS WARNING Select the method of operation that will give the minimum amount of turns and travel, providing the most efficient method for the jobsite. NOTE If the tires slip, the life of the tires will be reduced. Thus, avoid slipping or spinning the tires during operation.

  • Page 124: If Wheel Brakes Do Not Work

    OPERATION When working in water or on swampy ground, do not let the water come above the bottom of the axle housing. After finishing th e operation, wash and check the lubricating points. 12.11.2 IF WHEEL BRAKES DO NOT WORK If the machine is not stopped by depressing the brake pedal, use the parking brake to stop the machine.

  • Page 125: Precautions When Driving The Machine

    OPERATION 12.11.4 PRECAUTIONS WHEN DRIVING THE MACHINE When the machine travels at high speed for a long distance, the tires become extremely hot. This situation causes premature tire wear. Thus, avoid high-speed, long-distance trips. If the machine must be driven for a long distance, take the following precautions. Follow the regulations relating to this machine, and driv e carefully.

  • Page 126: Adjusting The Work Equipment Posture

    OPERATION 12.12 ADJUSTING WORK EQUIPMENT POSTURE WARNING Stop the machine on flat ground and put the 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 kickout makes it possible to set the bucket so that i t automatically stops at the desired lif t ing height (lift arm higher than horizontal) and the bucket positioner makes it possible to set the...

  • Page 127: Adjusting The Bucket Positioner

    OPERATION 12.12.2 ADJUSTING THE BUCKET POSITIONER 1. Lower the bucket to the ground and adjust the bucket to the desired digging angle. Set the bucket control lever at HOLD, stop the engine and adjust as follows. 2. Loosen the two bolts (1) and adjust the mounting bracket (4) of the proximity switch so that the rear tip of the angle (2 ) aligns with the center of the sensing surface of the proximity switch(3).

  • Page 128: Parking The Machine

    OPERATION 12.13 PARKING THE MACHINE WARNING Avoid stopping suddenly. Allow ample room when stopping. Do not park the machine on slopes. If the machine must be parked on a slope, position the machine facing directly down the slope, and dig the bucket into the ground.

  • Page 129: Checks After Completion Of Operation

    OPERATION 4. Operate the lift arm control lever (5) to lower the bucket to the ground. 5. Lock the lift arm control lever (5) and the bucket control lever (6) with the safety lock (7). 12.14 CHECKS AFTER COMPLETION OPERATION Check the engine water temperature, engine oil pressure, torque converter oil temperature, and fuel level with the meter and lamps.

  • Page 130: Check After Stopping The Engine

    OPERATION 2. Turn the key in the starting switch (1) to the OFF position and stop the engine. 3. Remove the key from the starting switch (1) . 12.16 CHECK AFTER STOPPING THE ENGINE 1. Walk around the machine and check the work equipment, body work, and undercarriage and check for oil and water leaks.

  • Page 131: Handling The Tires

    OPERATION REMARKS The starting switch key is used also for the locks at locations 1, 2, and 3. 12.18 HANDLING THE TIRES 12.18.1 PRECAUTIONS WHEN HANDLING TIRES If any of the following defects are found in a tire, replace it with a new one.
  • Page 132 OPERATION If tire deflection is excessive, raise the inflation pressure within the limits given in this table (see deflection ratio). Tire size Inflation pressure (kg/cm ) (pattern) rating Soft or Normal road Shipped from sandy factory Stockpile Digging ground 20.5-25 2.6-3.8 2.8-4.5 2.8-4.5...

  • Page 133: Transportation

    OPERATION TRANSPORTATION 13.1 LOADING, UNLOADING WORK WARNING Make sure the ramp has sufficient width, length, and thickness to enable the machine to be safely loaded and unloaded. When loading and unloading the machine, park the trailer on a flat, firm roadbed. Keep a fairly long distance between the road shoulder and the machine.

  • Page 134: Loading Precautions

    OPERATION 13.2 LOADING PRECAUTIONS After loading the machine in the specified position, secure it in the 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 th e engine.

  • Page 135: Position For Sticking The Lifting Position Mark

    OPERATION 13.3.1 POSITION FOR STICKING THE LIFTING POSITION MARK 13.3.2 WEIGHT TABLE Operating Weight Front wheel Rear wheel load Center of gravity load (from front axle) WA450-3 22,700 kg 10,541 kg. 12,160 kg. 1,821 mm (500,541 lb.) (23,240 lb.) (26,814 lb.) (5 ft.

  • Page 136: Lifting Procedure

    OPERATION 13.3.3 LIFTING PROCEDURE Lifting work can be performed only for machines with lifting marks. Before starting the lifting operation, stop the machine in a horizontal place and then do the following. 1. Start the engine, make sure that the machine is horizontal , then set the work equipment to the travel posture.

  • Page 137: Transportation Precautions

    OPERATION 13.4 TRANSPORTATION PRECAUTIONS WARNING When determining the transportation route, the machine’ s width, height, and weight must be considered. Obey all state and local laws governing the weigh t, width, and length of the load. Observe all regulations governing wide loads.

  • Page 138: Cold Weather Operation

    OPERATION COLD WEATHER OPERATION 14.1 LOW TEMPERATURE PRECAUTIONS 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 FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE on page 3-9. 14.1.2 COOLANT WARNING Keep the antifreeze fluid away from an open flame.

  • Page 139: Precautions After Work Completion

    OPERATION 14.2 PRECAUTIONS AFTER WORK COMPLETION To prevent mud and water from freezing on the machine, making it impossible for the machine to move the next morning, observe the following precautions. Mud and water in and on the machine should be completely removed. Park the machine on hard, dry ground or on wooden boards.

  • Page 140: Troubleshooting

    OPERATION TROUBLESHOOTING 16.1 WHEN THE MACHINE RUNS OUT OF FUEL WARNING Before cranking the engine, ensure that the area around the engine is safe. If the machine runs out of fuel, add the fuel and bleed the air from the fuel system before starting the engine. PROCEDURE FOR BLEEDING AIR The air can be quickly bled from the system, if the fuel tank is completely filled with fuel.

  • Page 141: 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 th e machine out of the mud. The operator should sit on the machine being towed and operate the steering in the direction that the machine is being towed.

  • Page 142: Releasing The Parking Brake

    OPERATION 16.2.3 RELEASING THE PARKING BRAKE WARNING When releasing the parking brake, stop the machine on a flat surface and check that the surroundings are safe. In emergencies or when the parking brake must be released on a hill, block the tires carefully before releasing the brake.
  • Page 143 OPERATION 2. METHOD FOR CANCELING WITH ADJUSTMENT SCREW If the brake pressure is low, do the following steps. 1. Loosen the adjustment screws (1) and the bolts (2) at A, B, C at the front of the transmission case. 2. After rotating the lock plate (3) to release the lock, tighten the adjustment screw (1) until it stops.

  • Page 144: Emergency Travel Operation

    OPERATION 16.2.4 EMERGENCY TRAVEL OPERATION The normal gear shift operation is performed by electric signals. In the event of an electrical system failure and the machine does not move, use the following procedure to move the machine. WARNING When performing this operation, always keep the engine stopped, except when starting the machine.

  • Page 145: 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 the engine, use a damp cloth to wipe off the dust atop the battery. The battery generates hydrogen gas, so there is danger of explosion.

  • Page 146: Precaution For Charging The Battery

    OPERATION 16.3.2 PRECAUTION FOR CHARGING THE BATTERY CHARGING THE BATTERY WHEN MOUNTED ON THE MACHINE Before charging the battery, disconnect the negative (- ) battery cable from the battery. This action prevents voltag e spikes from damaging the alternator. While charging the battery, remove all battery vents fo r satisfactory ventilation.

  • Page 147: Starting The Engine With Booster Cable

    OPERATION 16.3.3 STARTING THE ENGINE WITH BOOSTER CABLE When starting the engine with booster cables, perform the following steps: WARNING When connecting the booster cables, never touch the positive (+) terminal from one battery to the negative (-) terminal of another battery. When starting the engine with a booster cable, always wear safety glasses.
  • Page 148 OPERATION STARTING THE ENGINE 1. Make sure the clips are firmly connected to the battery terminals. 2. Start the engine of the normal machine and run it at high idle speed. 3. Turn the starting switch of the proble m machine to the START position and start the engine.

  • Page 149: 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 that are not listed below, please contact your distributor for repairs. Problem Main causes Remedy Lamp does not glow brightly Defective wiring Check, repair loose even when the engine runs at...

  • Page 150: Chassis

    OPERATION 16.4.2 CHASSIS ( ): Always contact your distributor when dealing with these items. In case of abnormalities or causes that are not listed below, please contact your distributor for repairs. Problem Main causes Remedy TRANSMISSION Engine is running but machine Parking brake is applied Release parking brake doesn’...
  • Page 151 OPERATION CHASSIS continued (16.4.2) Problem Main causes Remedy BRAKE Brake is not applied when pedal Worn disc (Replace disc) is depressed Defective hydraulic system Add oil to specified level Lack of oil See ? EVERY 100 HOURS Air in brake line SERVICE on page ?-38.
  • Page 152 OPERATION CHASSIS continued (16.4.2) Problem Main causes Remedy HYDRAULIC SYSTEM Lack of lifting power for bucket Lack of oil Add oil to specified level. See ? EVERY 100 HOURS Bucket takes time to raise Clogged hydraulic tank SERVICE on page ?-38. Replace filter.

  • Page 153: Engine

    OPERATION 16.4.3 ENGINE ( ): Always contact your distributor when dealing with these items. In case of abnormalities or causes that are not listed below, please contact your distributor for repairs. Problem Main causes Remedy Engine oil pressure caution pilot Engine oil pan oil level is Add oil, See ? CHECK lamp...
  • Page 154 OPERATION ENGINE 16.4.3 (continued) Problem Main causes Remedy Exhaust is white or blue Too much oil in the oil pan Add oil to specified level. See ? CHECK BEFORE STARTING on page ?-?. Improper fuel Change to specified fuel Exhaust gas occasionally turns Clogged air cleaner Clean or replace, See ? black...
  • Page 155 MAINTENANCE WA450-3MC...

  • Page 156: Guides To Maintenance

    MAINTENANCE GUIDES TO MAINTENANCE Do not perform any inspection and maintenance operation not given in this manual. Perform maintenance work on hard, flat ground. Set to the inspection and maintenance posture. Always perform an inspection with the machine in the following posture unless otherwise specified.
  • Page 157 MAINTENANCE Warning tag: Attach the warning tag to the starting switch or other appropriate control lever to avoid someone who is not aware of the circumstances from starting the engine. The warning tag is supplied together with the tools. Obey precautions: During machine operation, always obey the precautions on the safety label attached to the machine.

  • Page 158: Outlines Of Service

    MAINTENANCE 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 159: Fuel

    MAINTENANCE 18.1.2 FUEL The fuel pump is a precision instrument. If the fuel contains water or dirt, the pump cannot work properly. Be extremely careful not to let impurities get in the system when storing or adding fuel. Always use the fuel specified in the Operation and Maintenance Manual. Fuel may congeal, depending on th e temperature when it is used (particularly in low tempera tures below -15 to a fuel that matches the temperature.

  • Page 160: Storing Oil And Fuel

    MAINTENANCE 18.1.5 STORING OIL AND FUEL Keep the fuel indoors to prevent any water, dirt, or other impurities from getting into storage containers. When keeping drums for a long period, put the drum on its side so that the filler port of the drum is at the side to prevent the moisture from being sucked in.

  • Page 161: Outline Of Hydraulic System

    MAINTENANCE 18.4 OUTLINE OF HYDRAULIC SYSTEM During operation and immediately after operation is ended, the temperature of the hydraulic system still remains high. In addition, high hydraulic pressure is applied to the system. Take care when inspecting and maintaining the hydraulic system.

  • Page 162: Wear Parts List

    MAINTENANCE WEAR PARTS LIST Wear parts such as the filter elements, bucket teeth, etc. are to be replaced at the time of periodic maintenance o r before their abrasion limits. The wear parts s hould be changed correctly in order to use the machine economically. For part change, genuine Komatsu parts of excellent quality should be used.

  • Page 163: Fuel, Coolant And Lubricants According To Ambient Temperature

    MAINTENANCE FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIEN T TEMPERATURE 20.1 PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS It is not our policy to appro ve of fuel, coolant, and lubricants or to guarantee performance in service. The quality of the fuel, coolant and lubricant is the responsibility of the supplier.

  • Page 164: Engine Oil Specifications

    MAINTENANCE 20.2 ENGINE OIL SPECIFICATIONS 20.2.1 NORMAL OPERATION Oil performance recommendations are as follows: The use of a quality engine lubricating oil combined with appropriate o il and filter change intervals are critical factors in maintaining engine performance and durability. Komatsu Engine Oil or multi-viscosity engine oil meeting American Petroleum Institute (API) performanc e classification CF-4, CG-4, CF-4/SG or CG-4/SH or MIL-L-2104D or E is recommended.

  • Page 165: Transmission, Torque Converter, Transfer Case And Oil Cooler, Service Brakes And Hydraulic System Oil Specifications

    MAINTENANCE 20.3 TRANSMISSION, TORQUE CONVERTER, TRANSFER CASE AND OIL COOLER , SERVICE BRAKES AND HYDRAULIC SYSTEM OIL SPECIFICATIONS Komatsu Engine Oil or engine oil meeting American Petroleum Institute (API) performance classification CF-4, CG-4, CF-4/SG or CG-4/SH or MIL-L-2104D or E is recommended. NOTICE: Classification CD, CE, CD/SF or CE/SF oils may be used in areas where CF-4, CG-4, CF-4/SG or CG-4/SH oil is not yet available.

  • Page 166: Coolant Specifications

    MAINTENANCE The viscosity of the fuel must be kept above 1.3 cSt to provide adequate fuel system lubrication. Optionally, the equivalent grades of recognized Federal Government specifications may be used; the latest revisions of VV-F-800a. 20.6 COOLANT SPECIFICATIONS 20.6.1 GENERAL Selection and maintenance of the engine coolant is important to long engine life.

  • Page 167: Supplemental Coolant Additives

    MAINTENANCE NOTICE: Do not mix types of antifreeze solutions. Mixed solutions make it impossible to determine the protection against freezing. Antifreeze containing sealer or anti-leak additives should NOT be used in this system. Sealer or anti-leak additives will cause plugging problems in the cooling system. WARNING Use extreme caution when adding coolant to a hot radiator to avoid being burned.
  • Page 168 MAINTENANCE 4. A corrosion inhibitor/conditioner is recommended to inhibit cor r osion in the cooling system for the following reasons: Improved compatibility with high silicate antifreezes minimizes hydro-g e l formation, if over-concentration occurs. Provides engine protection in the following areas: - Solder corrosion/bloom - Copper corrosion/erosion/stress cracking - Oil fouling...
  • Page 169 MAINTENANCE If coolant is added between drain intervals, additional SCA will be required. Check the coolant DCA concentration level anytime coolant is added to the system. The SCA concentration must not fall below 0.13 units per liter or exceed 0.5 units per liter [0.5 units per U.S. gallon or exceed 2 units per U.S. gallon]. DCA4 UNIT GUIDE Fleetguard Part No.
  • Page 170 MAINTENANCE The answer represents the additional units required to precharge the cooling system. Four bottles o f powder, part number DCA95, will provide a sufficient amount of SCA units (80) to precharge the example cooling system. Install the appropriate service filter at the next and subsequent maintenance intervals. NOTE 3 - Change the coolant filter at every engine oil and filter change interval to protect the cooling system.

  • Page 171: Standard Tightening Torques For Bolts And Nuts

    MAINTENANCE STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS 21.1 INTRODUCTION OF NECESSARY TOOLS The following tools are needed when performing maintenance. Name of tool Part No. Remarks Width across flats 8 mm - 10 mm 12 mm - 14 mm Wrench set 09000-3006 13 mm - 17 mm...

  • Page 172: Torque List

    MAINTENANCE 21.2 TORQUE LIST Unless otherwise specified, tighten the metric bolts and nuts to the torque shown in the table. The tightening torque i s 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 Komats u genuine part of the same size as the part that was replaced.

  • Page 173: 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 perfor m periodic maintenance. In addition, to further improve safety, the user should also perform periodic replacement of the parts given in the table.
  • Page 174 MAINTENANCE 3-20 WA450-3MC...
  • Page 175 MAINTENANCE WA450-3MC 3-21...
  • Page 176 MAINTENANCE SAFETY CRITICAL PARTS Safety critical parts for periodic replacement Qty. Replacement interval Fuel hose (fuel tank to injection pump) Fuel hose (fuel tank to engine) Fuel pump hose (injection pump to fuel filter) Fuel hose (fuel filter to injection pump) Fuel spill hose (injection nozzle to fuel tank) Steering hose (pump to steering valve) Steering hose (steering valve to steering cylinder)

  • Page 177: Maintenance Schedule Chart

    MAINTENANCE MAINTENANCE SCHEDULE CHART 23.1 SCHEDULED MAINTENANCE CHART SERVICE ITEM PAGE INITIAL 250 HOURS SERVICE - 24.1 1. Replace fuel filter cartridge ............. . 3 -26 2.
  • Page 178 MAINTENANCE SERVICE ITEM PAGE 4. Clean element in air conditioner recirculation filter ..........3-43 5.
  • Page 179 MAINTENANCE SERVICE ITEM PAGE 5. Check alternator, starting motor ............3-59 6.

  • Page 180: Initial 250 Hours Service

    MAINTENANCE INITIAL 250 HOURS SERVICE 24.1 INITIAL 250 HOURS SERVICE Perform the following maintenance after the first 250 hours only. REPLACE FUEL FILTER CARTRIDGE REPLACE TRANSMISSION OIL FILTER ELEMENT REPLACE HYDRAULIC TANK FILTER ELEMENT CHECK ENGINE VALVE CLEARANCE, ADJUST For details of the method of replacing or maintaining, see the section on EVERY 500 HOURS and 2000 HOUR S SERVICE.
  • Page 181 MAINTENANCE 3. Direct dry, compressed air, l o wer than 7 kg/cm (100 psi), to the element from the inside along its folds. Then direct it from th e outside along its folds and again from the inside. A. Remo ve one seal from the outer element whenever the outer element has been cleaned.
  • Page 182 MAINTENANCE NOTE: After cleaning and drying the element, shine a light through the element. If any small holes or thin cracks are found, replace the element. When cleaning it, do not hit it or beat it against anything. Do not use an element that has an y damaged folds, gaskets, or seals.

  • Page 183: 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 184: 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 185: Clean The Axle Case Breather

    MAINTENANCE 24.2.4 CLEAN THE AXLE CASE BREATHER WARNING When checking the oil level, apply the parking brake and lock the front and rear frames with the safety bar and pin. Remove all mud and dirt from around the breather with a brush. When cleaning the breather, clean the breather at two places (front and rear).

  • Page 186: 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 187: Replace Bucket Teeth

    MAINTENANCE 24.2.7 REPLACE BUCKET TEETH 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 to the LOCK position. When the bucket teeth are worn, replace them as follows.

  • Page 188: Check Air Conditioner

    MAINTENANCE 24.2.8 CHECK AIR CONDITIONER Check twice a year, spring 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 189: Clean The Air Conditioner Condenser

    MAINTENANCE 24.2.9 CLEAN THE AIR CONDITIONER CONDENSER WARNING Do not wash the condenser with a steam cleaner or 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 190: Drain Water From Water Separator (If Equipped)

    MAINTENANCE 24.2.12 DRAIN WATER FROM WATER SEPARATOR (i f equipped) When the float (2) is at or above the red line (1), drain the wate r according to the following procedure. 1. Loosen the drain plug (3) and the air bleed plug (4) (if equipped).
  • Page 191 MAINTENANCE Check Tire Pressure and Inflating Tires WARNING When inflating a tire, check that no one will enter the working area and use an air chuck which has a clip and which can be fixed to the air valve. While inflating the tire, check the inflation pressure occasionally so that it will not rise too high.

  • Page 192: Checks Before Starting

    MAINTENANCE 24.3 CHECKS BEFORE STARTING See the section on CHECKS BEFORE STARTING in SECTION 2. 24.4 EVERY 50 HOURS SERVICE 24.4.1 DRAIN WATER, SEDIMENT FROM FUEL TANK Loosen the valve (1) on the right side of the tank so that th e sediment and water will be drained with the fuel.

  • Page 193: 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 194: Lubricate Rear Axle Pivot Pin (3 Places)

    MAINTENANCE 24.5.3 LUBRICATE REAR AXLE PIVOT PIN (3 PLACES) WARNING Set the work equipment in a stable condition. Turn the machine off 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. 1.
  • Page 195 MAINTENANCE 5. Using the filter wrench, turn the filter cartridge (1) counterclockwise. 6. Clean the filter holder. After filling the new filter cartridge wit h engine oil, coat the filter seal and thread with engine oil. Install the filter. 7. Once the filter’ s seal contacts the filter holder’ s surface, tighten the filter an additional 3/4 to 1 turn.

  • Page 196: Check Tension Of Fan Belt, Alternator Belt, Adjust

    MAINTENANCE 24.6.2 CHECK TENSION OF FAN BELT, ALTERNATOR BELT, ADJUST CHECK The belt deflection should be about 10 mm (0.39 in.) when pressed with a finger force of about 58.8 N (6 kgf) at a point midway between the fan pulley and the alternator pulley. 1.

  • Page 197: Check For Loose Wheel Hub Nuts, Tighten

    MAINTENANCE 24.6.3 CHECK FOR LOOSE WHEEL HUB NUTS, TIGHTEN Loose wheel hub nuts (1) accelerate tire wear, and may cause an accident. 1. Using a torque wrench, check each nut for the specified torque. Hub nut torque: 471+/- 49 N• m (347.2 +/- 36.2 lbft.) 2.

  • Page 198: Check Air Conditioner Compressor Belt Tension, Adjust

    MAINTENANCE 24.6.5 CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST Checking The belt deflection should be from 16 to 20 mm (0.6 to 0.8 in.) when pressed with the thumb at a force of 98 N (22 lbf) at a point midway between the air conditioner compressor pulley and the fan pulley.

  • Page 199: Check Battery Electrolyte Level

    MAINTENANCE 24.6.6 CHECK BATTERY ELECTROLYTE LEVEL WARNING To avoid gas explosions, do not bring fire or spark near the battery. Battery electrolyte is dangerous. If it gets in your eyes or on your skin, wash it off with lots of water, and consult your doctor.

  • Page 200: Lubricating

    MAINTENANCE 24.6.7 LUBRICATING WARNING Set the work equipment in a stable condition and turn the machine off. 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. 1.

  • Page 201: Every 500 Hours Service

    MAINTENANCE 24.7 EVERY 500 HOURS SERVICE Maintenance for every 50, 10 0, and 250 hours should be performed at the same time. 24.7.1 REPLACE THE FUEL FILTER CARTRIDGE WARNING Engine is at high temperature immediately after the machine has been operated. Wait for the engine to cool down before replacing the filter.

  • Page 202: Replace Transmission Oil Filter Element

    MAINTENANCE 24.7.2 REPLACE TRANSMISSION OIL FILTER ELEMENT 1. Remove the drain plug (1) at the bottom of the filter case, and drain the oil. After draining the oil, tighten the plug to: 107.9 +/- 14.7 N• m (79.6 +/- 10.8 lbf ft.) 2.

  • Page 203: Lubricate Center Drive Shaft Spline

    MAINTENANCE 24.7.3 LUBRICATE CENTER DRIVE SHAFT SPLINE WARNING Set the work equipment in a stable condition. Turn the machine off and apply the lock for the work equipment control levers. Apply the parking brake. Lock the front and rear frames with the safety bar and pin.

  • Page 204: Every 1,000 Hours Service

    MAINTENANCE 24.8 EVERY 1,000 HOURS SERVICE WARNING The transmission oil will be hot immediately after turning the machine off. Wait for the oil to cool down before changing the transmission oil. Maintenance for every 50, 100, 250 and 500 hours should b e performed at the same time.

  • Page 205: Clean Transmission Case Breather

    MAINTENANCE 3. After removing the bolts (2) and the cover (3), remove the strainer (4). 4. Remove all dirt from the strainer (4) before washing it in clean, light oil (diesel or flushing oil). Replace the strainer if it is torn. 5.

  • Page 206: 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. Use a grease pump to grease the grease fitti n gs, which are identified by the arrows in the illustration.
  • Page 207 MAINTENANCE 4. Rear drive shaft (2 places) 5. Engine stop motor linkage (1 place) WA450-3MC 3-53...

  • Page 208: Check Tightening Parts Of Turbocharger

    MAINTENANCE 24.8.4 CHECK TIGHTENING PARTS OF TURBOCHARGER Contact your distributor to have the tightening points checked. 24.8.5 CHECK PLAY OF TURBOCHARGER ROTOR Ask your distributor to check the turbocharger rotor play. 24.8.6 REPLACE CORROSION RESISTOR CARTRIDGE 1. Screw in the valve (1) at the side of the corrosion resistor. 2.

  • Page 209: Every 2000 Hours Service

    MAINTENANCE 24.9 EVERY 2000 HOURS SERVICE Perform the maintenance for every 50, 100, 250, 500, 1000 hours at the same time. 24.9.1 CHANGE OIL IN HYDRAULIC TANK WARNING The oil is hot if the machine has just been operated. Wait for the oil to cool down before changing it.
  • Page 210 MAINTENANCE 8. Remove the cover bolts (4) of the two filter covers (3) at th e top of the tank and remove the covers. 9. After removing the spring (5) and the bypass valve (6), remove the element (7). 10. Before cleaning the element, ensure that no foreign material exists inside the tank.

  • Page 211: Replace The Hydraulic Tank Breather Element

    MAINTENANCE 16. Operate the steering, bucket, and lift arm cylinders to the en d of their strokes three to four times. Turn the engine off an d loosen the bleed plug (8). 17. Check the hydraulic oil level and add oil to the specified level . For details, See 24.5 EVERY 100 HOURS SERVICE on page 3-38.

  • Page 212: Change Axle Oil

    MAINTENANCE 24.9.3 CHANGE AXLE OIL WARNING The axle oil will be hot if the machine was just turned off after having been operational. Wait for the oil to cool before changing it. 1. Place a container under the oil plug (P) to catch the oil. 2.

  • Page 213: Check Brake Disc Wear

    MAINTENANCE 24.9.4 CHECK BRAKE DISC WEAR Have your distributor check and repair brake discs. 24.9.5 CHECK ALTERNATOR, STARTING MOTOR The brush may be worn or the bearing may lack grease. Contact your distributor for inspection or repair. If the machine is started frequently, perform the inspection every 1,000 hours.

  • Page 214: Every 4,000 Hours Service

    MAINTENANCE 24.10 EVERY 4,000 HOURS SERVICE Perform the maintenance for every 50, 100, 250, 500, 1000 and 2000 hours at the same time. 24.10.1 CHECK WATER PUMP Check that no play exists in the p ulley. Also, check that no grease or water leaks from the drain hole, or that it is clogged.

  • Page 215: Specifications

    SPECIFICATIONS WA450-3MC...

  • Page 216: General

    SPECIFICATIONS SPECIFICATIONS 25.1 GENERAL Smaller size tire Larger size tire 23.5-25 L3 26.5-25 L3 Bucket capacity 4.2 m³ (5.4 yd³) Normal load 6,720 kg (14,820 lb.) 6.2 km/h (3.9 mph) 6.6 km/h (4.1 mph) 11.2 km/h (7.0 mph) 12.3 km/h (7.6 mph) Forward 19.8 km/h (12.3 mph) 21.8 km/h (13.5 mph)
  • Page 217 SPECIFICATIONS WA450-3MC...
  • Page 218 OPTIONS, ATTACHMENTS WA450-3MC...

  • Page 219: Optional Parts And Attachments

    OPTIONS, ATTACHMENTS OPTIONAL PARTS AND ATTACHMENTS NAME SPECIFICATION, USE Capacity 2.6 m³ (3.4 yd³) Excavating bucket Capacity (with BOC) 2.8 m³ (3.6 yd³) Capacity (for light duty work) 3.8 m³ (4.9 yd³) Light material bucket Capacity (for light duty work, with BOC) 4.0 m³ (5.2 yd³) Bucket tooth Bolt-on tooth / Tip tooth Cutting edge...

  • Page 220: Selecting Buckets And Tires

    OPTIONS, ATTACHMENTS SELECTING BUCKETS AND TIRES Select the most suitable bucket and tires for the type of work and job site conditions. TYPE OF WORK BUCKET GROUND CONDITIONS TIRE 20.5-25-16PR 23.5-25-16PR General ground condition Rock Rock Loading products Stockpile bucket 20.5-25-16PR 26.5-25-16PR Loading and carrying...

  • Page 221: Air Conditioning

    OPTIONS, ATTACHMENTS AIR CONDITIONING 28.1 GENERAL LOCATIONS AND FUNCTION OF CONTROL PANEL 28.1.1 FAN SWITCH This can be used to adjust the air flow to 4 stages. This switch also acts as the main switch for the air conditioner. When the switch i s pressed, the indicator lamp above the switch lights up to indicate the air flow.

  • Page 222: Mode Selector Switches

    OPTIONS, ATTACHMENTS 28.1.3 MODE SELECTOR SWITCHES Selecting the individual mode switch determines the vents that the air is distributed from: FACE FACE/FEET FEET FEET/DEF Pressing the indi v idual switch lights up the indicator lamp above the the selected vent mode. 28.1.4 FRESH/RECIRC SELECTOR SWITCH This switch is used to select between recirculating the air inside the cab or taking in fresh air from outside.

  • Page 223: Method Of Operation

    OPTIONS, ATTACHMENTS 28.2 METHOD OF OPERATION Vent mode Switch Air conditioner Temperature FRESH/RECIR Fan switch selector switch control switch switch switch Condition of use Rapid All blue RECIR FACE Cooling More than half Normal HI-LO FRESH FACE are blue More than half Dehumidifying, heating HI-LO FRESH...

  • Page 224: Handling Ecss

    OPTIONS, ATTACHMENTS HANDLING ECSS (Electronic Controlled Suspension System) Always read this section before using the ECSS in order to enable you to use it safely and effectively. 29.1 STRUCTURE AND FUNCTION OF ECSS The ECSS 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 travelin g .

  • Page 225: Method Of Operating Ecss

    OPTIONS, ATTACHMENTS 29.2 METHOD OF OPERATING ECSS The ECSS switch is on the left side of the panel. Pressing the ECSS switch turns on ECCS and the pilot lamp (orange) lights up. Pressing the switch again turns off the pilot lamp and the ECSS is canceled. It is possible to perform this operation with the ECSS switch ON.

  • Page 226: Precautions When Handling Accumulator

    OPTIONS, ATTACHMENTS 29.4 PRECAUTIONS WHEN HANDLING ACCUMULATOR WARNING The accumulator is charged with a high pressure nitrogen gas, which is extremely dangerous. Read the following items and handle the accumulator properly. If any problem or failure occurs within the accumulator, contact your distributor immediately.

  • Page 227: Disconnecting The Ecss Piping

    OPTIONS, ATTACHMENTS 29.5 DISCONNECTING THE ECSS PIPING WARNING Park the vehicle on a level surface, and install the safety bar to lock the front and rear frames together. Lower the bucket to the ground, stop the engine, actuate the parking brake and block the wheels.

  • Page 228: Option Display

    OPTIONS, ATTACHMENTS OPTION DISPLAY This is on the left side of the main panel and indicates the condition of actuation of the options. 30.1 EMERGENCY STEERING PILOT LAMP This lamp indicates that the main pump is operating normally when the machine is traveling. If the engine stops when the machine is traveling, or if there is a n abnormality in the pump circuit, the monitor flashes to indicate that the emergency steering system has been actuated.

  • Page 229: Radio

    OPTIONS, ATTACHMENTS 30.2 RADIO 30.2.1 OPERATION 1. LIQUID CRYSTAL DISPLAY (LCD) PANEL The LCD panel is the primary information display: radi o frequency, time, audio settings, a nd cassette operation (if used). 2. ON-OFF POWER BUTTON Press this button to turn off the power for the radio and cassette player.

  • Page 230: Operation

    OPTIONS, ATTACHMENTS 6. RADIO BAND SELECTOR (BAND) Radio operation: Press this button to change the radio ban d (FM1, FM2, AM, Weather Band). Cassette operation: Press this button to manually change the cassette from Side One to Side Two. 7, 8. UP, DOWN TUNING/SEEK TUNING/CASSETTE FAST FORWARD AND REWIND To manually select a radio station, momentarily press the “...

  • Page 231: Setting The Clock

    OPTIONS, ATTACHMENTS E. Repeat the procedure for each button and four bands. You can change any preset memory without affecting the others. It’ s unlikely that more than one We ather Band station will be available in a given area. Thus, most of the Weather Band preset radio stations will go unused.

  • Page 232: Remote Control Unit

    OPTIONS, ATTACHMENTS 30.2.3 REMOTE CONTROL UNIT 1. Turn the radio power off. 2. Grasp the sides of the remote at the t o p serrated edges and pull upward. NOTE: When removed from its cradle, the remote is inoperable. Do not expose the remote or cradle to extreme heat, direct sunlight, solvents, or water.

  • Page 233: Load Meter

    OPTIONS, ATTACHMENTS LOAD METER This section explains the use of the load meter in determining the amount of load, the production amount, and to check the operation when loading fixed amounts. The load meter is a system to convert the lift cylinder oil pressure to the weight of the load and then display it. This equipment is intended to assist our customers in their internal administration.
  • Page 234 OPTIONS, ATTACHMENTS GENERAL LOCATIONS (continued) WA450-3MC 5-17...

  • Page 235: Adjusting Load Measurement Points

    OPTIONS, ATTACHMENTS 31.2 ADJUSTING LOAD MEASUREMENT POINTS To improve the position when measuring, perform the following operation. 1. Tilt the bucket fully back and raise the boom until the arm is in the horizontal position (boom height “ H” ). 2.

  • Page 236: Calibration (Adjusting 0 Point)

    OPTIONS, ATTACHMENTS 31.3 CALIBRATION (ADJUSTING 0 POINT) To ensure accurate measurements, always calibrate (adjust the zero point) before using. 31.3.1 CHECK BEFORE ADJUSTING Check that the word “ CAL” is flashing in the upper display panel. If the word “ CAL” is not displayed, perform the following steps. If the green LED lights up (SUBTOTAL mode): If both the top and bottom display panels show 0.00 (0.0) tons, press the CAL switc h and the display will change to CAL.

  • Page 237: Adjusting

    OPTIONS, ATTACHMENTS 31.3.2 ADJUSTING Perform this adjustment when the word CAL is flashing. After the engine reaches operating temperature, tilt the bucket forward to empty it. Raise the boom until the buzzer sounds, which indicates that the calibration is complete. 31.3.3 CHECKING CALIBRATION Press the CAL switch (1) twice to make the word “...

  • Page 238: Measuring

    OPTIONS, ATTACHMENTS 31.4 MEASURING The load meter can measure the SUBTOTAL and REMAIN. SUBTOTAL: Use to find the amount loaded into a dump truck, hopper, and so on. Data can accumulate for a maximum of 50 0 loads. REMAIN: The operator can dial in any value, up to a maximum of 500.00 ton, on the load meter as the target amount to be loaded.
  • Page 239 OPTIONS, ATTACHMENTS Use the REMAIN display (4) in conjunction with the lower display panel (6) to adjust the bucket load.Tilt the bucket back after loading it. After placing t h e boom to the horizontal position, lower the boom to a point midway between horizontal and the ground.

  • Page 240: Setting Target Amount In Remain Mode

    OPTIONS, ATTACHMENTS 31.5 SETTING TARGET AMOUNT IN REMAIN MO DE To set the target amount in the REMAIN mode: Check that the red LED (1) is flashing in the remain display. Pressing the ADJ switch (2) will cause the lowest digit to flash. Pressing the SFT switch (3) causes the next digit to the left to flash.

  • Page 241: Printing Data

    OPTIONS, ATTACHMENTS 31.6 PRINTING DATA Two types of data can be printed: SUBTOTAL and TOTAL. The data can only be printed while the amount loaded in the bucket is being displayed. 31.6.1 PRINTING SUBTOTAL Press the SUBTOTAL switch to print the data. The switch is located on the load meter and the work equipment control lever.

  • Page 242: Deleting Data From Storage Device

    OPTIONS, ATTACHMENTS 31.7 DELETING DATA FROM STORAGE DEVICE The data in the memory is retained after the power is turned off. To delete the data: Press the TOTAL switch and SUBTOTAL switch simultaneously. The word “ CLEA” flashes in the upper display panel. Continu e pressing both switches and 0.0 0 will be displayed, indicating that the data in the memory has been erased.

  • Page 243: Setting Time On Clock

    OPTIONS, ATTACHMENTS 31.8 SETTING TIME ON CLOCK The load meter has a built-in clock. It provides the date and tim e when the data is printed. To adjust the date and time: Check that the green LED (1) of the SUBTOTAL display is flashing. Press the MODE switch (2) and ADJ switch (3) simultaneously for 3 seconds to switch to the clock mode.

  • Page 244: Replacing Printer Paper

    OPTIONS, ATTACHMENTS 31.9 REPLACING PRINTER PAPER When the printer runs out of paper, install a new roll of paper a s follows: Raise the acryl dust cover. Open the paper cover to the front. Remo ve the tab from the roll of paper and cut off the first 5 cm of the roll.
  • Page 245 OPTIONS, ATTACHMENTS Press the FEED switch and the printer will feed the paper. After inserting the roll of paper into the meter, ensure that the paper doesn’ t bend too sharply at select points. 5-28 WA450-3MC...

  • Page 246: Troubleshooting Function

    OPTIONS, ATTACHMENTS 31.10 TROUBLESHOOTING FUNCTION The load meter is equipped with a self-diagnostics function. If an y one of the error codes below appears on the display, press the CAL switch once. This action should cancel the error code. However, i f the error code appears continuously, note it and contact you r Komatsu distributor.
  • Page 247 OPTIONS, ATTACHMENTS 5-30 WA450-3MC...
  • Page 248 WA450-3MC 5-31...
  • Page 249 Komatsu America International Company 440 North Fairway Drive PROPOSAL FOR MANUAL REVISION Vernon Hills, IL 60061-8112 U.S.A. Attn: Technical Publications Fax No. (847) 970-4186 FOR INTERNAL USE ONLY -- No. PMR P NAME OF COMPANY: LOCATION: PHONE NO: DEPARTMENT: DATE: NAME: MANUAL NAME: MANUAL NO:...

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