Komatsu Utility WB97S-5 Operation & Maintenance Manual
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Komatsu Utility WB97S-5 Operation & Maintenance Manual

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Operation & Maintenance
Manual
ATTENTION
Unsafe use of this machine may cause serious injury
or death. Operators and maintenance personnel
must read this manual before operating or
maintaining this machine.
This manual should be kept inside the cab for
reference and periodically reviewed by all personnel
who will come into contact with the machine.
WB97S
BACKHOE-LOADER
SERIAL NUMBER
WB97S-5 F50003
https://tractormanualz.com
WEAM007600
-5
and up

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  • Page 1 Operation & Maintenance WEAM007600 Manual WB97S BACKHOE-LOADER SERIAL NUMBER WB97S-5 F50003 and up ATTENTION Unsafe use of this machine may cause serious injury or death. Operators and maintenance personnel must read this manual before operating or maintaining this machine. This manual should be kept inside the cab for reference and periodically reviewed by all personnel who will come into contact with the machine.
  • Page 2 https://tractormanualz.com...

  • Page 3: Foreword 1.1 Foreword

    Komatsu Dealers have gathered a considerable amount of experience over years of work in close contact with the users. If more information is needed, do not hesitate to contact your Komatsu Dealer: he always knows how to get the best performance from the machine, he can recommend the equipment that is most suitable for specific needs and can provide the technical assistance necessary for any change that may be required to conform the machine to the safety standards and traffic rules.

  • Page 4: Information On Safety

    This word is used to indicate a useful piece of information. Komatsu cannot reasonably predict every circumstance that might involve a potential hazard during the operation or maintenance of the machine; for this reason, the safety messages included in this manual and applied onto the machine may not include all possible safety precautions.
  • Page 5 WARNING It is strictly forbidden to modify the setting of the hydraulic system safety valves; Komatsu cannot be held liable for any personal injury, or damage to property or the machine, if this has been tampered with by modifying the standard setting of the hydraulic system.

  • Page 6: Introduction

    INTRODUCTION 1.3 INTRODUCTION 1.3.1 INTENDED USES The Komatsu BACKHOE LOADERS described in this manual have been designed and constructed to be used mainly with the following functions: LOADER EXCAVATOR Through the installation of optional equipment, the machine can also be used for the following applications:...

  • Page 7: Main Characteristics

    INTRODUCTION 1.3.3 MAIN CHARACTERISTICS Simple and easy operation. Servo-assisted steering with priority hydraulic system. Three steering modes selected by means of microswitches in pairs. - Two-wheel steering (2WS) - Four-wheel steering (4WS ROUND) - Four-wheel steering (4WS CRAB) Gearshift with electronic gear selection through solenoid-operated actuators and hydraulic converter; reverse gear and speed change with controls on a single lever.

  • Page 8: Product Identification

    PRODUCT IDENTIFICATION 1.4 PRODUCT IDENTIFICATION The Komatsu backhoe loader and its main components are identified by serial numbers stamped on the identification plates. The serial number and the identification numbers of the components are the only numbers that must be indicated to the Dealer when requiring assistance and ordering spare parts.

  • Page 9: Machine Identification Plate And Product Identification Number (Pin)

    WEIGHT REAR AXLE FROM Product Identification Number - Massa rimorchiabile: non atto MATRICOLA SERIAL NUMBER ANNO POTENZA MOTORE MANUFACTURED BY KOMATSU UTILITY EUROPE S.p.A. 36025 NOVENTA VIC. (VI) -ITALY 37A-98-11840 RKA16060 TYPE HOMOLOGATION NUMBER FROM TOTAL MASS WEIGHT WEIGHT FRONT AXLE...

  • Page 10: Engine Serial Number And Exhaust Gas Emission Plate

    PRODUCT IDENTIFICATION 1.4.4 ENGINE SERIAL NUMBER AND EXHAUST GAS EMISSION PLATE The identification plate (1) is fixed above the engine head and indicates the engine model, total displacement and serial number. The identification plate (2) is fixed to the left side of the engine block, bears the Manufacturer’s mark and contains the following data: 1 - Engine type...

  • Page 11: Rear Axle Serial Number

    PRODUCT IDENTIFICATION 1.4.6 REAR AXLE SERIAL NUMBER The serial number is stamped on the plate positioned on the left side of the axle body. RKAB5990 1.4.7 TRANSMISSION SERIAL NUMBER The transmission serial number is stamped on the plate postioned on the right side of the transmission case. RKAB2750 1.4.8 CAB SERIAL NUMBER The cab serial number is stamped on the plate postioned on the...

  • Page 12: Serial Numbers And Dealer's Address

    PRODUCT IDENTIFICATION 1.4.9 SERIAL NUMBERS AND DEALER’S ADDRESS Machine no. Mod. Product identification number (PIN) Engine no. Front axle no. Rear axle no. Transmission no. Cab no. Dealer: Address: Tel. Contact person: NOTES: https://tractormanualz.com...

  • Page 13: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS FOREWORD FOREWORD............................INFORMATION ON SAFETY ........................ INTRODUCTION ........................... 1.3.1 INTENDED USES ........................1.3.2 IMPROPER OR UNAUTHORIZED USE .................. 1.3.3 MAIN CHARACTERISTICS...................... 1.3.4 RUNNING-IN ..........................PRODUCT IDENTIFICATION ....................... 1.4.1 MACHINE IDENTIFICATION NUMBER (PIN) ................. 1.4.2 MACHINE IDENTIFICATION PLATE AND PRODUCT IDENTIFICATION NUMBER (PIN) (alternatively for some markets) ....................
  • Page 14 TABLE OF CONTENTS PRECAUTIONS TO BE TAKEN DURING WORK ................2.4.1 WHEN STARTING THE ENGINE..................... 2.4.2 RULES FOR TRAVELLING ON ROADS.................. 2.4.3 HAND SIGNALS ........................2.4.4 CHECKS FOR TRAVELLING IN REVERSE ................2.4.5 MOVING THE MACHINE ......................2.4.6 WORKING ON SLOPES ......................2.4.7 PREVENTING ELECTROCUTION ..................
  • Page 15 TABLE OF CONTENTS DESCRIPTION AND USE OF THE MACHINE SAFETY LOCKS ........................... 3.1.1 FRONT LOADER LOCKS ......................3.1.2 BACKHOE LOCKS........................GENERAL VIEWS..........................3.2.1 FRONT GENERAL VIEW ......................3.2.2 BACKHOE GENERAL VIEW....................3.2.3 CAB INSIDE GENERAL VIEW....................INSTRUMENTS AND CONTROLS ....................... 3.3.1 FRONT INSTRUMENTS ......................
  • Page 16 TABLE OF CONTENTS STOPPING THE ENGINE ........................TRANSPORTING THE MACHINE ON OTHER VEHICLES ..............3.9.1 LOADING AND UNLOADING THE MACHINE................. 3.9.2 TRANSPORT..........................3.10 PRECAUTIONS TO BE TAKEN IN THE COLD SEASON ..............3.10.1 FUEL AND LUBRICANTS ......................3.10.2 COOLANT ..........................3.10.3 BATTERY ..........................
  • Page 17 TABLE OF CONTENTS FUEL, COOLANT AND LUBRICANTS....................4.3.1 LUBRICATION WITH GREASE ....................4.3.2 HOMOLOGATED SYNTHETIC BIODEGRADABLE LUBRICANTS “HEES” ......DRIVING TORQUES ..........................4.4.1 STANDARD DRIVING TORQUES FOR SCREWS AND NUTS ..........4.4.2 SPECIFIC DRIVING TORQUES FOR SCREWS AND NUTS ..........4.4.3 STANDARD DRIVING TORQUES FOR HOSES WITH ORFS..........
  • Page 18 TABLE OF CONTENTS 4.8.6 MAINTENANCE EVERY 50 HOURS OF OPERATION ............4.8.6.a CHECKING THE HYDRAULIC OIL LEVEL ............4.8.6.b CHECKING THE FLUID LEVEL IN THE RADIATOR ..........4.8.6.c CHECKING THE BRAKING SYSTEM OIL LEVEL ..........4.8.6.d LUBRICATING THE PROPELLER SHAFTS ............4.8.6.e LUBRICATING THE FRONT AXLE JOINTS AND CENTRAL COUPLING AND THE REAR AXLE JOINTS ................
  • Page 19 TABLE OF CONTENTS TECHNICAL SPECIFICATIONS TECHNICAL DATA ..........................5.1.1 STANDARD OVERALL DIMENSIONS ..................5.1.1.1 OVERALL DIMENSIONS WITH STANDARD ARM ..........5.1.1.2 OVERALL DIMENSIONS WITH TELESCOPIC ARM ..........5.1.2 TECHNICAL CHARACTERISTICS ..................5.1.3 LIFTING CAPACITIES ......................5.1.3.1 SYMBOL TABLE ..................... 5.1.3.2 LIFTING CAPACITIES (STANDARD ARM) ............
  • Page 20 TABLE OF CONTENTS APPLICATION OF THE OFFSET DEVICE ................... 6.7.1 DESCRIPTION AND CONTROL ....................6.7.2 MAINTENANCE........................CONFIGURATION FOR THE USE OF OPTIONAL EQUIPMENT WITH UNIDIRECTIONAL OIL FLOW265 6.8.1 DESCRIPTION AND CONTROL ....................6.8.2 INSTALLING AND CONNECTING THE EQUIPMENT ............6.8.3 MAINTENANCE........................

  • Page 21: Safety And Accident Prevention

    SAFETY AND ACCIDENT PREVENTION https://tractormanualz.com...

  • Page 22: Safety, Noise And Vibration Plates

    Do not use fuel, petrol or solvents. If the plates are damaged, ask for new ones to Komatsu or to your Komatsu Dealer. In case of replacement of a component provided with a safety plate, make sure that this plate is applied also on the new piece.
  • Page 23 SAFETY, NOISE AND VIBRATION PLATES RKA16730 42N-93-11320 42N-93-11310 RKAB4740 https://tractormanualz.com...

  • Page 24: Pictograms And Relevant Meanings

    SAFETY, NOISE AND VIBRATION PLATES 2.1.2 PICTOGRAMS AND RELEVANT MEANINGS The warning and danger signs applied onto the machine are accompanied by or illustrated through pictograms. The personnel in charge with handling and maintenance operations must know the symbols contained in the pictograms perfectly;...
  • Page 25 SAFETY, NOISE AND VIBRATION PLATES CONSULT THE MANUAL Carefully read the contents of the manual before using the machine or performing maintenance operations. 42N-93-11130 RKA14730 RISK OF CRUSHING Do not touch or stand near moving parts, since your hands may be crushed or cut off.
  • Page 26 SAFETY, NOISE AND VIBRATION PLATES LOCK THE LOADER CONTROL When it is necessary to travel on roads, lock the loader control lever before starting. PRIMA DI PARTIRE PER IL TRASFERIMENTO SU STRADA BLOCCARE LA LEVA COMANDO PALA! 42N-93-12460 RKA14770 CONNECT THE BRAKE PEDALS When the machine travels on roads, the brake pedals must be connected with the apposite pin.
  • Page 27 SAFETY, NOISE AND VIBRATION PLATES HYDRAULIC OIL FILTER 37A-98-12310 RKA14820 REFUELLING 37A-98-12240 RKA14830 FUEL FILTER 37A-98-12250 RKA14840 ENGINE LUBRICATING OIL FILTER 37A-98-12230 RKA14850 ENGINE AIR SUCTION FILTER 37A-98-12260 RKA14860 ENGINE COOLANT 37A-98-12340 RKA14870 https://tractormanualz.com...
  • Page 28 SAFETY, NOISE AND VIBRATION PLATES COOLANT PRESSURE 37A-98-12270 RKA14880 TRANSMISSION OIL LEVEL 395-93-11440 RKA14590 TRANSMISSION OIL FILTER 395-93-11420 RKA14580 POWER OUTLET 12 V 42N-93-11270 RKA14890 BOOM LOCK 42N-93-11320 RKA14900 SWING LOCK 42N-93-11310 RKA14910 https://tractormanualz.com...
  • Page 29 SAFETY, NOISE AND VIBRATION PLATES ANCHORAGE POINT 42N-93-11360 RKA14920 EMERGENCY EXIT 42N-93-11260 RKA14930 BRAKE OIL RKA14940 DO NOT LIFT MORE THAN 1000 kg SWL 1000 Kg RKA14950 https://tractormanualz.com...

  • Page 30: Position Of The Noise Plates On Machines With Cab

    Do not use fuel, petrol or solvents. If the plates are damaged, ask for new ones to Komatsu or to your Komatsu Dealer. In case of replacement of a component provided with a noise plate, make sure that this plate is applied also on the new piece.

  • Page 31: Vibrations To Which The Operator Is Subjected

    SAFETY, NOISE AND VIBRATION PLATES 2.1.4 VIBRATIONS TO WHICH THE OPERATOR IS SUBJECTED According to the results of the tests carried out to determine the vibrations transmitted to the operator by the machine, the upper limbs are subjected to vibrations lower than 2.5 m/sq.sec., while the seated part of the body is subjected to vibrations lower than 0.5 m/sq.sec.

  • Page 32: General Precautions

    GENERAL PRECAUTIONS 2.2 GENERAL PRECAUTIONS 2.2.1 GENERAL SAFETY RULES Only trained and authorized personnel can use the machine and perform maintenance operations. Follow all the safety rules, precautions and instructions when using the machine or performing maintenance operations. When working with other operators or when the work site is often occupied by other operators, make sure that everyone knows and understands all the signs described above and, in any case, that everyone works in such a way as to be able to see the machine and to be visible to the operator.

  • Page 33: Unauthorized Modifications

    2.2.4 UNAUTHORIZED MODIFICATIONS Any modification made to the machine without the authorization of Komatsu can involve hazards. Before making a modification, consult your Komatsu Dealer. Komatsu declines any responsibility for injury or damage caused by unauthorized modifications. 2.2.5 LEAVING THE OPERATOR’S SEAT When leaving the operator’s seat, even if for a short time, make...

  • Page 34: Getting On And Off The Machine

    GENERAL PRECAUTIONS 2.2.6 GETTING ON AND OFF THE MACHINE Do not jump on or off the machine, both when it is at rest and when it is moving. Always use the handles and the safety ladders to get on or off the machine, and be very careful.

  • Page 35: Preventing Fires Due To Fuel And Oil

    GENERAL PRECAUTIONS 2.2.8 PREVENTING FIRES DUE TO FUEL AND OIL Fuel, oil and some types of antifreeze can be easily ignited if they get in contact with a flame. Fuel is flammable and therefore very dangerous. Keep any naked flame away from flammable fluids. Stop the engine and do not smoke when refuelling.

  • Page 36: Preventing Damage Due To Asbestos Powder

    GENERAL PRECAUTIONS 2.2.10 PREVENTING DAMAGE DUE TO ASBESTOS POWDER Asbestos powder can be hazardous to your health if it is inhaled. If the material to be handled contains asbestos fibres, it is compulsory to make sure that all the laws and safety regulations in this regard are respected.

  • Page 37: Fire Extinguishers And First Aid Kit

    If the cab is inadvertently hit or the machine overturns during work, the cab may be damaged with consequent reduction of its stiffness and of the safety that must be guaranteed to the operator (ROPS/FOPS). Contact Komatsu or your Komatsu Dealer to have the cab structure and resistance checked in case of impact or damage.

  • Page 38: Precautions To Be Taken Before Starting The Engine

    Check the safety belt and change it if it is broken or damaged. Replace any component only with homologated parts available at Komatsu or its Dealers. Make always sure that the lock of the right door, which is considered the emergency door, is open.

  • Page 39: Room Ventilation

    PRECAUTIONS TO BE TAKEN BEFORE STARTING THE ENGINE 2.3.4 ROOM VENTILATION Before starting the machine in confined or poorly ventilated places, provide for proper ventilation or connect the engine exhaust pipe to a suction duct. The engine exhaust gases can be deadly.

  • Page 40: Precautions To Be Taken During Work

    PRECAUTIONS TO BE TAKEN DURING WORK 2.4 PRECAUTIONS TO BE TAKEN DURING WORK 2.4.1 WHEN STARTING THE ENGINE Before getting on the machine, walk around it and check for people and objects that might be in the way. Do not start the engine if warning plates have been attached to the steering wheel or the control levers. When starting the engine, sound the horn as an alert signal.

  • Page 41: Hand Signals

    PRECAUTIONS TO BE TAKEN DURING WORK 2.4.3 HAND SIGNALS WARNING When it is necessary to position loads, make excavations or move the machine with a reduced field of vision, the operator must be helped by another person (signalman) who should stand on the ground and give signals to indicate the manoeuvres to be carried out according to the specific instructions provided for by the relevant regulations.
  • Page 42 PRECAUTIONS TO BE TAKEN DURING WORK 3 - MOVE THE LOAD AWAY IN HORIZONTAL DIRECTION One arm outstretched and hand in vertical position with the palm facing towards the load to be moved away: move the hand in the direction of the movement to be carried out. RKA15160 4 - BRING THE LOAD NEARER IN HORIZONTAL DIRECTION One arm outstretched and hand in vertical position with the...
  • Page 43 PRECAUTIONS TO BE TAKEN DURING WORK 9 - FOLD THE ARM With both fists clenched, point the thumbs inwards. RKA15220 10 - EXTEND THE ARM With both fists clenched, point the thumbs outwards. RKA15230 11 - FOLD THE BUCKET Keep one hand still and closed. Rotate the other hand vertically with the forefinger pointing towards the closed hand.
  • Page 44 PRECAUTIONS TO BE TAKEN DURING WORK 15 - TRAVEL STRAIGHT AHEAD Rotate the fists vertically indicating the turning direction of the wheels. RKA15280 16 - TRAVEL STRAIGHT AHEAD Rotate the fists vertically indicating the turning direction of the wheels. RKA15290 17 - DISTANCE TO BE COVERED Hands raised and palms facing inwards: move the hands laterally indicating the distance to be covered.
  • Page 45 PRECAUTIONS TO BE TAKEN DURING WORK 21 - Stop the engine Pass thumb or forefinger across the throat. RKA15340 22 - RETRACT THE TELESCOPIC ARM One forearm lifted forwards and clenched fingers: point the thumb in the direction of the movement to be carried out. RKA15350 23 - EXTEND THE TELESCOPIC ARM One forearm lifted forwards and clenched fingers: point the...

  • Page 46: Checks For Travelling In Reverse

    PRECAUTIONS TO BE TAKEN DURING WORK 2.4.4 CHECKS FOR TRAVELLING IN REVERSE When operating in areas that may be hazardous or where visibility is poor, designate a person to direct the movements of the machine and traffic on the work site. Before moving the machine, sound the horn to warn the persons standing or working in the area.

  • Page 47: Working On Slopes

    PRECAUTIONS TO BE TAKEN DURING WORK 2.4.6 WORKING ON SLOPES Operations on slopes and on river or lake banks with damp ground may result in the tipping over or slipping of the machine. Do not work with the bucket downward with respect to the tractor.

  • Page 48: Preventing Electrocution

    PRECAUTIONS TO BE TAKEN DURING WORK 2.4.7 PREVENTING ELECTROCUTION Digging operations near overhead electric lines are extremely dangerous and they may also cause death due to electrocution; for this reason, when working near overhead electrical lines, always respect the minimum safety distances prescribed by the competent authorities and by the accident-prevention rules in force.

  • Page 49: Visibility

    PRECAUTIONS TO BE TAKEN DURING WORK 2.4.8 VISIBILITY Switch on the headlights or the work lights as soon as visibility decreases. If visibility decreases due to mist, smoke or heavy rain, stop the machine in a safe position and wait for the weather to improve until visibility becomes acceptable.

  • Page 50: Parking The Machine

    PRECAUTIONS TO BE TAKEN DURING WORK 2.4.12 PARKING THE MACHINE Park the machine on firm and level ground. If this is not possible and it is necessary to park on a slope, position the machine with the front bucket directed downwards and carry out the following operations: 1 - While keeping the machine stopped with the brakes, apply the parking brake.

  • Page 51: Transporting The Machine On Other Vehicles

    TRANSPORTING THE MACHINE ON OTHER VEHICLES 2.5 TRANSPORTING THE MACHINE ON OTHER VEHICLES 2.5.1 LOADING AND UNLOADING THE MACHINE Loading and unloading the machine on-off a motor vehicle Ramps always involves potential hazards. Proceed with extreme care. The loading and unloading of the machine on-off the means of transport must be carried out on a flat surface and at a safety distance from the edges of ditches or from the road side.

  • Page 52: Battery

    BATTERY 2.6 BATTERY 2.6.1 PREVENTING RISKS THAT MAY BE DUE TO THE BATTERY Electrolytic batteries contain sulphuric acid, which can cause burns. It can also corrode clothing and make holes in it. In case of contact with battery acid, immediately wash the involved part with plenty of water.

  • Page 53: Precautions For Emergency Recovery

    PRECAUTIONS FOR EMERGENCY RECOVERY 2.7 PRECAUTIONS FOR EMERGENCY RECOVERY The draw hooks must be used only for the first aid and not for towing the machine. Before moving the machine, make sure that the gearshift lever is in neutral and disengage the four-wheel drive. Incorrect manoeuvres may cause serious damage, injury and even death.

  • Page 54: Precautions To Be Taken During Maintenance

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8 PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.1 WARNING PLATES Before starting any maintenance operation, position the machine on firm and level ground, engage the safety locks of the equipment and of the controls, stop the engine and apply the parking brake.

  • Page 55: Personnel

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.3 PERSONNEL Any maintenance operation must be carried out exclusively by authorized and duly trained personnel; specific and personal protection measures must be adopted when grinding, welding and when using sledges or heavy hammers. When assembling the equipment or cylinder connection pins, use wooden, plastic or in any case not excessively hard tools to check the centering of the holes.

  • Page 56: Keeping The Machine Clean

    60 cm, in order to avoid damaging the warning plates and the pictograms. If the plates are damaged, request Komatsu or your Komatsu Dealer to send you spare plates and change them. Water into the electric system provokes the oxidation of the contacts and may hinder the start of the machine or even make it start suddenly and abruptly.

  • Page 57: Stop The Engine Before Carrying Out Any Maintenance Operation Or Inspection

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.9 STOP THE ENGINE BEFORE CARRYING OUT ANY MAINTENANCE OPERATION OR INSPECTION Stop the machine only on firm and level ground and stop the engine before carrying out any maintenance operation or inspection. If it is necessary to have the engine running during maintenance, engage the safety LOCKS of the equipment control levers, apply the parking brake and carry out any maintenance operation with the help of another person;...

  • Page 58: Rules To Be Followed During Fuel Or Oil Topping Up

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.10 RULES TO BE FOLLOWED DURING FUEL OR OIL TOPPING UP Spilled fuel or oil make the ground slippery and may cause accidents; clean any dirty area carefully and without delay. Always tighten the fuel tank and hydraulic oil tank safety caps securely.

  • Page 59: Precautions To Be Taken When Handling The Battery And The Alternator

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.13 PRECAUTIONS TO BE TAKEN WHEN REMOVAL HANDLING THE BATTERY AND THE ALTERNATOR When repairing the electrical system, disconnect the battery in order to stop the flow of current. IMPORTANT Disconnect first the negative cable (–) and then the positive cable (+).

  • Page 60: Handling High-Pressure Pipes

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.15 HANDLING HIGH-PRESSURE PIPES Do not bend high-pressure pipes or rub them with sharp or abrasive objects. Do not use any bent or cracked pipes or hoses that were previously rejected because of leaks or fastening defects, since they may burst during use.

  • Page 61: Hydraulic Accumulator

    RKA12540 do not hit or press the accumulator; when disposing of the accumulator, take care to release the gas it contains. Have this operation carried out only by a Komatsu Dealer. 2.8.19 COOLING FAN AND FAN BELT Be careful to the revolving parts and do not allow anyone to get too close to these components, since clothes or parts of the body may get caught into them.

  • Page 62: Precautions Concerning Technopolymers And Elastomers

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.21 PRECAUTIONS CONCERNING TECHNOPOLYMERS AND ELASTOMERS DANGER Some components of the machine contain polymers and elastomers (Viton sealing rings, Teflon rings, piston seals made of fluoroelastomers, electric cable insulating materials, etc.). At room temperature and up to approximately 200°C these materials can be handled without taking any precautions, since they are completely inert.

  • Page 63: Precautions For The Installation Of The Exhaust System Tailpipe

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.23 PRECAUTIONS FOR THE INSTALLATION OF THE EXHAUST SYSTEM TAILPIPE When the machine is stopped at the end of work, the exhaust pipe (1) and the tailpipe (2) are very hot. In these conditions, if any maintenance operation has to be carried out, the operator runs the risk of being burned or injured.
  • Page 64 THIS PAGE WAS INTENTIONALLY LEFT EMPTY https://tractormanualz.com...
  • Page 65 THE MACHINE AND ITS OPERATIONS https://tractormanualz.com...

  • Page 66: Safety Locks

    SAFETY LOCKS 3.1 SAFETY LOCKS DANGER If it is necessary to carry out any maintenance operation or to stop the machine with lifted loader arm, always engage the mechanical safety retainer and lock the control lever. When travelling on roads, always engage the mechanical lock, lock the control lever in order to keep the front bucket in a stable position and use the front bucket swing lock and the teeth guard.
  • Page 67 SAFETY LOCKS The other applications of the safety locks concern: Installation of the front bucket swing lock (1). RWAA0770 Locking position of the button inhibiting the servo controls (2) (servo control locking button) (LED on). RKAB6050 Installation of the teeth guard (3). RKA16820 https://tractormanualz.com...

  • Page 68: Backhoe Locks

    SAFETY LOCKS 3.1.2 BACKHOE LOCKS The backhoe is held completely lifted by a single coupling that does not allow the boom to be lowered. The other safety device regards the swing, which is prevented, both in the central and in the folded position, by means of a pin. To lock the boom, proceed as follows: 1 - Fold the bucket and arm completely.
  • Page 69 SAFETY LOCKS 5 - Raise the stabilizers completely and couple the safety chains (5) to the stabilizers. The controls are inhibited by the servo control locking button (2) (LED on). RKA13820 6 - Stop the engine and shift the levers (6) to settle the safety locks.

  • Page 70: General Views

    GENERAL VIEWS 3.2 GENERAL VIEWS 3.2.1 FRONT GENERAL VIEW RIGHT LEFT FORWARD RKAB6080 1 - Front bucket 6 - Rear axle 2 - Bucket dumping cylinder 7 - Fuel tank 3 - Bucket lifting arm 8 - Front axle 4 - Cab 9 - Backhoe bucket cylinder 5 - Hydraulic oil tank https://tractormanualz.com...

  • Page 71: Backhoe General View

    GENERAL VIEWS 3.2.2 BACKHOE GENERAL VIEW RIGHT FORWARD LEFT RKAB6100 1 - Backhoe bucket 8 - Right access platform and tool box 2 - Arm 9 - Backhoe sliding guides 3 - Boom 10 - Stabilizers 4 - Arm cylinder 11 - Backhoe locking cylinders 5 - Boom cylinder 12 - Boom swing cylinder...

  • Page 72: Cab Inside General View

    12 - Arm and swing control lever (Standard version “ISO pattern controls”) - Boom and swing control lever (On request only with Pattern Change “Komatsu pattern controls”) 13 - Boom and bucket control lever (Standard version “ISO pattern controls”) - Arm and bucket control lever (On request only with Pattern Change “Komatsu pattern controls”)

  • Page 73: Instruments And Controls

    INSTRUMENTS AND CONTROLS 3.3 INSTRUMENTS AND CONTROLS 3.3.1 FRONT INSTRUMENTS km/h RKA16970 8 - Low oil pressure or braking system failure warning Low fuel warning light light 2 - Four-wheel drive warning light 9 - General alarm warning light 3 - Warning light not used 10 - High beam warning light 4 - Parking brake warning light 11 - Low beam warning light...
  • Page 74 INSTRUMENTS AND CONTROLS 2 - FOUR-WHEEL DRIVE WARNING LIGHT It comes on when the four-wheel drive is engaged. RKA13870 3 - WARNING LIGHT NOT USED. RKA13880 4 - PARKING BRAKE WARNING LIGHT It comes on when the parking brake is applied. RWA20230 5 - TRANSMISSION OIL TEMPERATURE WARNING LIGHT It comes on and activates the acoustic alarm when the...
  • Page 75 INSTRUMENTS AND CONTROLS 6 - LEFT DIRECTION INDICATOR WARNING LIGHT It flashes on and off when the indicator (13) is operated to turn to the left, while it comes on at the same time as the warning light (7) when the hazard flashers are activated (see "3.3.2 pos. 16 - HAZARD FLASHERS").
  • Page 76 INSTRUMENTS AND CONTROLS 10 - HIGH BEAM WARNING LIGHT It comes on when the high beam is operated through the dimmer switch - pos. (13). RKA13910 11 - LOW BEAM WARNING LIGHT It comes on when the low beam is operated with two clicks of the switch (17) positioned on the side dashboard (see "3.3.2 pos.
  • Page 77 If tyres with rolling circumference different from that of the standard tyres are installed, have the speedometer setting checked by your Komatsu Dealer. RKA16990 15 - DIRECTION SELECTOR, DIMMER SWITCH, HORN,...

  • Page 78: Side Instruments

    INSTRUMENTS AND CONTROLS 3.3.2 SIDE INSTRUMENTS 1 - Fuel level indicator 2 - Engine coolant temperature indicator 3 - Revolution counter - Hour meter 4 - Hydraulic oil filter clogging warning light 5 - Generator warning light 6 - Glow plug preheating warning light 7 - Engine coolant temperature warning light 8 - Engine oil pressure warning light...
  • Page 79 INSTRUMENTS AND CONTROLS 1 - FUEL LEVEL INDICATOR It indicates the fuel level in the tank and functions only when the ignition key is in position «I». IMPORTANT If the indicator reaches the red low fuel area during work, stop the machine and provide for refuelling. The warning light (1) positioned on the front instrument panel signals when the fuel level is too low (see "3.3.1 pos.
  • Page 80 INSTRUMENTS AND CONTROLS 4 - HYDRAULIC OIL FILTER CLOGGING WARNING LIGHT It comes on when the hydraulic oil filter is clogged and must be replaced (see "4.8.10.c CHANGING THE HYDRAULIC SYSTEM OIL FILTER"). RWA22340 5 - GENERATOR WARNING LIGHT This warning light comes on, together with the acoustic alarm, when the starting circuit is energized and goes out when the engine exceeds the idling rpm;...
  • Page 81 INSTRUMENTS AND CONTROLS 8 - ENGINE OIL PRESSURE WARNING LIGHT This warning light comes on, together with the acoustic alarm, when the engine is not running and the starting circuit is operated and goes out as soon as the engine lubrication circuit is pressurized.
  • Page 82 INSTRUMENTS AND CONTROLS 12 - SERVO CONTROL LOCKING BUTTON WARNING When travelling on roads, always engage the servo control locking device. This button has the function to inhibit the servo controls and must be used when the machine travels on roads and as safety lock when leaving the driver’s seat or parking the machine.
  • Page 83 INSTRUMENTS AND CONTROLS 15 - BACKHOE BOOM LOCKING BUTTON This is a button that automatically returns to position OFF and is used to couple the safety lock to the boom when the backhoe is not going to be used or when the machine travels on roads. Press the button (LED on) to lift the safety lock;...
  • Page 84 INSTRUMENTS AND CONTROLS 19 - REAR HORN It serves to warn the persons in the surrounding area before starting work and in case of danger when working with the backhoe. RKA14010 20 - ELECTRIC SAFETY VALVE SWITCH (if installed) When pressed (LED on), this switch deactivates the safety valves installed on the front loader cylinders.
  • Page 85 INSTRUMENTS AND CONTROLS 24 - IGNITION SWITCH The ignition switch is a rotary key switch with four positions marked with the following symbols« » - (OFF) - « » - « » (START). .For further details on the use of this switch, see"3.6.2 STARTING THE ENGINE".

  • Page 86: Push Buttons On The Front Loader Control Lever

    INSTRUMENTS AND CONTROLS 3.3.3 PUSH BUTTONS ON THE FRONT LOADER CONTROL LEVER 1 - Declutch push button 2 - Free push button 3 - 4in1 bucket opening push button 4 - 4in1 bucket folding push button 5 - Front loader speed control push button 6 - KICK DOWN button RKAB5230 1 - DECLUTCH PUSH BUTTON...
  • Page 87 INSTRUMENTS AND CONTROLS 4 - 4IN1 BUCKET FOLDING PUSH BUTTON Press the push button to fold the bucket; when the push button is released, the bucket stops. (See "3.3.5 pos. 12 - 4 IN1 BUCKET OPENING PUSH BUTTON"). RKA14060 5 - FRONT LOADER SPEED CONTROL PUSH BUTTON This button is used to increase the speed of the front loader movements.

  • Page 88: Cab Switches And Electric Accessories

    INSTRUMENTS AND CONTROLS 3.3.4 CAB SWITCHES AND ELECTRIC ACCESSORIES 1 - FRONT WORK LIGHT SWITCH This switch enables the front work lights installed on the cab. IMPORTANT When travelling on roads, switch off the work lights. RKAB4620 2 - REVOLVING LIGHT SWITH This switch must be operated when it is necessary to travel on roads and after connecting the light to the outlet installed on the cab roof.
  • Page 89 INSTRUMENTS AND CONTROLS 5 - REAR WINDSHIELD WASHER SWITCH This switch, with automatic return to the OFF position, operates the rear windshield washer. RKAB4660 6 - OVERHEAD LAMP The overhead lamp is used to check the instruments and the inside of the cab when visibility is scarce. RKAB3050 7 - POWER OUTLET The 12V power outlet is in compliance with the ISO 4165-1979...
  • Page 90 INSTRUMENTS AND CONTROLS 9 - BATTERY DISCONNECTION SWITCH (if provided) The battery disconnection switch (9) is positioned on the left side of the machine, inside the engine compartment, and can be reached by opening the engine hood (see "3.5.1 ENGINE HOOD").

  • Page 91: Machine Controls

    INSTRUMENTS AND CONTROLS 3.3.5 MACHINE CONTROLS 1 - Reverse gear lever 2 - Brake pedals 3 - Accelerator 4 - Front loader control lever 5 - Parking brake 6 - Hand accelerator 7 - Backhoe boom locking button 8 - Backhoe sliding lock switch 9 - Declutch push button RKAB5240 10 - Free push button...
  • Page 92 -Start the engine (see "3.6.2 STARTING THE ENGINE"). -Press the brake pedals -Shift the reverse gear lever (1) to the reverse position R. If the alarm does not work, have the machine checked by your Komatsu Dealer. https://tractormanualz.com...
  • Page 93 INSTRUMENTS AND CONTROLS This is a combined lever control and allows the selection of the direction and the gearshift. By shifting the lever (1) upwards and rotating it on the vertical axis it is possible to select the direction of movement of the machine, based on three positions: N - Neutral F - Forward...
  • Page 94 INSTRUMENTS AND CONTROLS MANUAL GEARSHIFT After starting the engine, turn the selector (1) to one of the three positions allowed by the manual mode, independently of the engine speed, but taking into account the speed of the vehicle. The gearbox will engage the gear corresponding to the selected position and the display on the dashboard will indicate what gear is engaged.
  • Page 95 INSTRUMENTS AND CONTROLS 2 - BRAKE PEDALS WARNING The brake pedals must always be connected when the 3 or 4 gear is engaged and when the machine travels on roads. Non-compliance with this rule may result in serious accidents. The machine is provided with two split brake pedals that make it RWA13950 possible to turn sharply in small work areas with many obstacles;...
  • Page 96 INSTRUMENTS AND CONTROLS 4 - FRONT LOADER CONTROL LEVER WARNING Before carrying out any manoeuvre with this lever, the operator must be seated in the driving position, with fastened safety belt. If the loader control lever has to be used during travel, avoid any abrupt and quick movement that may affect the balance of the machine and make it difficult to drive.
  • Page 97 INSTRUMENTS AND CONTROLS If the lever is shifted following an inclined direction with respect to RWA00550 the machine axes, simultaneous movements, proportional to the inclination angle, are obtained, since the two hydraulic distributors responsible for the single functions are operated at the same time.
  • Page 98 INSTRUMENTS AND CONTROLS 5 - PARKING BRAKE CAUTION The parking brake must be applied whenever it is necessary to leave the driving position, even if temporarily. The machine must be parked with the rear wheels firmly resting on a flat surface. If one of the rear wheels is unstable or rests on a small obstacle, the machine may move.
  • Page 99 INSTRUMENTS AND CONTROLS 6 - HAND ACCELERATOR WARNING The use of the hand accelerator is allowed only under the conditions specified below; use in any other condition may cause serious accidents. The hand accelerator can be used only when the engine is warming up and successively only when it is necessary to work with the backhoe;...
  • Page 100 INSTRUMENTS AND CONTROLS 7 - BACKHOE BOOM LOCKING BUTTON WARNING Always engage the boom safety lock when the backhoe is not going to be used and when travelling on roads. This switch automatically returns to position OFF and is used to couple the boom to the safety lock (A).
  • Page 101 INSTRUMENTS AND CONTROLS 8 - BACKHOE SLIDING LOCK SWITCH The switch (9) has the function to release the pressure necessary to lock the backhoe unit, so that the backhoe can slide on the guides. With released switch (LED off) the backhoe unit is fixed on the guides.
  • Page 102 INSTRUMENTS AND CONTROLS 11 - 4 IN1 BUCKET OPENING PUSH BUTTON On machines equipped with 4in1 bucket, the distributor for the opening of the bucket is controlled via the push button (11) positioned on the loader control lever. Press the button to open the bucket; when the button is released, the bucket stops.
  • Page 103 INSTRUMENTS AND CONTROLS 14 - KICK DOWN BUTTON The button (14) is enabled with both automatic and manual gearshift and allows the gears to be shifted from 2nd to 1st and vice versa. In manual mode downshifting from 2nd to 1st gear is indicated by the warning light (A) flashing on the front dashboard.
  • Page 104 INSTRUMENTS AND CONTROLS 15 - STEERING SELECTOR UNIT WARNING Before travelling on roads, make sure that the two-wheel steering mode (2WS) is selected; the LED A comes on to signal that the 2WS has been selected. IMPORTANT Every time the engine is started the two-wheel steering mode (2WS) is automatically selected, even if when the machine was stopped the selected mode was the four-wheel round or crab steering.
  • Page 105 INSTRUMENTS AND CONTROLS TWO-WHEEL STEERING “2WS” (travel) The two-wheel steering mode (2WS) allows the steering wheel to control only the front wheels and must be used when travelling at high speed and on public roads. The two-wheel steering mode (2WS) allows all the available gears to be engaged. NOTE Every time the machine is started, the two-wheel steering mode (2WS) is automatically selected, even if when it stopped the...
  • Page 106 INSTRUMENTS AND CONTROLS FOUR-WHEEL CRAB STEERING “4WS CRAB” (to be used in building sites to position the machine for different applications) The four-wheel crab steering mode allows the steering wheel to control the front and rear wheels at the same time and in the same direction to perform cross movements to the right or to the left.
  • Page 107 INSTRUMENTS AND CONTROLS 18/19 - BACKHOE CONTROL LEVERS WARNING Before carrying out any manoeuvre with these levers, the operator must be seated in working position, that is, with the seat rotated by 180° with respect to the driving position and with fastened safety belt; before any manoeuvre, take all the precautions specified in section "3.13 USING THE MACHINE AS AN EXCAVATOR".
  • Page 108 1 - ISO PATTERN CONTROLS (Standard) 2 - KOMATSU PATTERN CONTROLS (Optional) The choice of the control pattern is up to the operator; for the selection of the pattern desired, see pos. 20 - PATTERN CHANGE RKA15110 CONTROL LEVER (if provided)"...
  • Page 109 INSTRUMENTS AND CONTROLS ISO PATTERN CONTROLS LEVER 18 (BASIC MANOEUVRES) RWA00600 N - Neutral A - Boom swing to the left B - Arm opening C - Boom swing to the right D - Arm folding LEVER 19 (BASIC MANOEUVRES) RWA00610 N - Neutral A - Bucket folding...
  • Page 110 INSTRUMENTS AND CONTROLS KOMATSU PATTERN CONTROLS LEVER 18 (BASIC MANOEUVRES) RWA00560 N - Neutral A - Boom swing to the left B - Boom lowering C - Boom swing to the right D - Boom lifting LEVER 19 (BASIC MANOEUVRES)
  • Page 111 INSTRUMENTS AND CONTROLS 20 - PATTERN CHANGE CONTROL LEVER (if provided) WARNING Before using the pattern change control lever to modify the machine’s operating pattern, lower the equipment to the ground and stop the engine. After changing the control operating pattern, carry out the first manoeuvres slowly and very carefully, in order to understand the new controls correctly and to avoid any damage or fatal injury that may be caused by incorrect...

  • Page 112: Adjusting The Controls

    INSTRUMENTS AND CONTROLS 3.3.6 ADJUSTING THE CONTROLS 1 - Steering wheel adjusting lever 2 - Joystick locking levers 3 - Arm support adjusting knob 4 - Joystick stroke adjusting knob RKAB3230 RKA15370 RKA15380 1 - STEERING WHEEL ADJUSTING LEVER WARNING The steering wheel can be adjusted only with engine off and the operator seated in the driving position.
  • Page 113 INSTRUMENTS AND CONTROLS JOYSTICK LOCKING LEVERS WARNING Before operating the locking levers to adjust the position of the joysticks, lower the work equipment to the ground and stop the engine. Adjust the joysticks remaining seated in the driving position. Before rotating the joysticks, make sure that the safety button is in locking position (LED on) (see "3.3.2 pos.
  • Page 114 INSTRUMENTS AND CONTROLS JOYSTICK STROKE ADJUSTING KNOB WARNING The adjustment of the joystick stroke must be carried out before starting work and with the machine completely still. Before carrying out this operation make sure that the servo control locking button is in locking position (LED on) (see "3.3.2 pos.

  • Page 115: Fuses And Relays

    FUSES AND RELAYS 3.4 FUSES AND RELAYS IMPORTANT When changing a fuse, make sure that the ignition key is in position « ». If the fuses are oxidized, corroded or do not fit perfectly in their seat, replace them only with new fuses having the same capacity.
  • Page 116 FUSES AND RELAYS High beam relay, low beam relay, horn relay, safety valve solenoid valves Engine stop solenoid, ancillary functions relay, air conditioner relay Revolving light power supply Hour counter memory, hazard warning light Cigarette lighter power supply, overhead light Light blue Left low beam, right low beam Light blue...

  • Page 117: Relays

    FUSES AND RELAYS 3.4.1.2 RELAYS POSITION DESCRIPTION Safety unit (against repeated start) F12 F13 F14 F15 Blinking F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 Low beam relay High beam relay F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 K4 K5 K7 K8 K10 K11...

  • Page 118: Ventilation, Heating And Air Conditioning Fuses And Relays

    FUSES AND RELAYS 3.4.2 VENTILATION, HEATING AND AIR CONDITIONING FUSES AND RELAYS The fuses and relays are grouped on a single base positioned under the storage compartment and can be reached after opening the door (1) and removing the container (2). The following tables indicate the characteristics and the functions of the single fuses and relays.

  • Page 119: Guards, Cab And Driver's Seat

    GUARDS, CAB AND DRIVER’S SEAT 3.5 GUARDS, CAB AND DRIVER’S SEAT 3.5.1 ENGINE HOOD WARNING Do not open the engine hood when the engine is running. Do not use the machine without engine hood and do not start the engine when the hood is open, unless this is expressly prescribed for certain maintenance operations.

  • Page 120: Cab

    The cab is ROPS-FOPS homologated; if it is subjected to an impact for any reason or if the machine overturns, immediately contact your Komatsu Dealer to have the cab replaced. The cab is equipped with two doors: the left door is the one to be used to get on and off the cab, while the right door is to be used as emergency exit.
  • Page 121 GUARDS, CAB AND DRIVER’S SEAT The rear side windows can be opened partially or completely. To open them partially, proceed as follows: 1 - Release the lever (3) from the lower coupling pin (4), following the direction indicated by the arrow shown in Figure (A).
  • Page 122 GUARDS, CAB AND DRIVER’S SEAT 3 - Rotate the rear side windows towards the front of the machine, until engaging the coupling (6) in the rubber element (7), as shown in Figure (E). To close the rear side windows, turn the knob (8) and release the rubber element (7) from the coupling (6).

  • Page 123: Ventilation And Heating

    GUARDS, CAB AND DRIVER’S SEAT 3.5.3 VENTILATION AND HEATING The ventilation and heating of the cab serve to reduce the operator’s stress both in summer and in winter; these functions also serve to eliminate condensate from the front window, thus ensuring visibility during both work and travel.

  • Page 124: Air Conditioner (If Installed)

    For specific maintenance operations to be performed on the air conditioning system, contact your Komatsu Dealer. Non-compliance with these instructions may cause serious damage and even death. The cab ventilation and cooling functions have the specific purpose to reduce the operator’s stress when the outside...
  • Page 125 GUARDS, CAB AND DRIVER’S SEAT Air distribution is obtained by means of a series of adjustable vents with variable flow rate (6) and (7), both for the air flow inside the cab and for the air flow with defogging function. For air recirculation inside the cab distribution is obtained by means of an adjustable vent with variable flow rate (8).

  • Page 126: Seat

    GUARDS, CAB AND DRIVER’S SEAT 3.5.5 SEAT 3.5.5.1 SEAT (STANDARD) The seat is really comfortable, in fact it features five different adjustment options: a - longitudinal position; b - back inclination; c - degree of suspension, in order to dampen the inevitable vibrations and jumps as much as possible;...

  • Page 127: Seat (Optional)

    GUARDS, CAB AND DRIVER’S SEAT 3.5.5.2 SEAT (OPTIONAL) The seat is really comfortable, in fact it features six different adjustment options: longitudinal position; back inclination; degree of suspension, in order to cushion the inevitable vibrations and jumps as much as possible; height and cushion inclination;...

  • Page 128: Safety Belt

    GUARDS, CAB AND DRIVER’S SEAT 3.5.6 SAFETY BELT WARNING Fasten the safety belt before starting the engine. The safety belt must be changed when it is frayed, damaged or worn and in any case every 4 years. The safety belt (1) is of the type with two coupling points and adjustable length (2);...

  • Page 129: Storage Compartment

    GUARDS, CAB AND DRIVER’S SEAT 3.5.10 STORAGE COMPARTMENT A storage compartment (1) has been obtained on the inner side of the right mudguard and can be reached after opening the door (2). The door is equipped with a lock (3). RKAB6260 RKAB6270 https://tractormanualz.com...

  • Page 130: Use Of The Machine

    Dirt, oil and fuel in the engine compartment near hot parts may damage the machine and even cause fires. Check frequently and eliminate any leakage; if leakages occur repeatedly, contact your Komatsu Dealer. Before starting the engine, check around and under the machine to verify: 1 - Check for loose screws or nuts.

  • Page 131: Operational Checks

    USE OF THE MACHINE 3.6.1.2 OPERATIONAL CHECKS WARNING All the checks must be carried out by the operator while seated, with fastened safety belt. When the machine is at rest after use or maintenance, some safety locks may not be engaged; when the operator gets into the cab, he must make sure that all the mechanical safety locks are engaged and that the equipment cannot move suddenly and create dangerous situations.

  • Page 132: Starting The Engine

    USE OF THE MACHINE 3.6.2 STARTING THE ENGINE WARNING Before starting the engine, carefully read the instructions and information regarding safety given in this manual and make sure that you know the controls. From the moment in which the engine is started, the operator is directly responsible for any damage that may be caused by wrong manoeuvres and non-compliance with the safety regulations and the rule of the road.

  • Page 133: Starting With Cold Engine Or In Cold Climates

    If the engine does not start at the first attempt, repeat the operations 1 and 2 after waiting for at least 30 seconds, in RWA01970 order not to overload the battery. For specific applications in cold climates, request the "COLD ARRANGEMENT" configuration to your Komatsu Dealer RWA01980 https://tractormanualz.com...

  • Page 134: Warming The Engine

    USE OF THE MACHINE 3.6.3 WARMING THE ENGINE 1 - After starting the engine, let it warm up before starting work. 2 - The ideal warming up of the engine is achieved with a constant speed of 1200 rpm, obtained with the hand accelerator (see "3.3.5 pos.

  • Page 135: How To Move The Machine

    USE OF THE MACHINE 3.6.5 HOW TO MOVE THE MACHINE WARNING Before moving the machine, make sure that you know the control functions and all the relevant safety regulations perfectly. The operator must be seated in the driving position with fastened safety belt and must have checked the position of the rear-view mirrors.

  • Page 136: Engaging The Four-Wheel Drive

    USE OF THE MACHINE 3.6.5.1 ENGAGING THE FOUR-WHEEL DRIVE WARNING The four-wheel drive must be engaged only with machine at rest or travelling at low speed. When travelling on roads or removing the machine, disengage the four-wheel drive. The four-wheel drive can be engaged and disengaged by means of the switch (1) positioned on the front dashboard.

  • Page 137: Working On Slopes

    USE OF THE MACHINE 3.6.5.2 WORKING ON SLOPES WARNING Before starting work on slopes, always check the functionality of the brakes and of the parking brake. Always engage the four-wheel drive. Avoid engaging the high gears. Do not move downhill with the gearshift in neutral, but keep always the low gears engaged.

  • Page 138: Maximum Immersion Depth

    USE OF THE MACHINE 3.6.5.3 MAXIMUM IMMERSION DEPTH WARNING If it is necessary to work with the machine immersed in water or on river banks or sea shores, always check the water depth and the current flow. Make sure that the surface on which you are working is sufficiently firm. If it is necessary to work with the machine immersed in water, make sure that the maximum depth does not exceed 50 cm and in any case that the engine cooling fan does not touch the water, since it may get damaged or even break.

  • Page 139: Parking The Machine

    PARKING THE MACHINE 3.7 PARKING THE MACHINE 3.7.1 PARKING ON LEVEL GROUND WARNING Park the machine on firm and flat ground, in a sufficiently wide space, so that checks, daily lubrication and refuelling can be carried out without problems. Lower the front bucket to the ground and set the backhoe to the transport position or with the bucket resting on the ground.

  • Page 140: Parking On Slopes

    PARKING THE MACHINE 3.7.2 PARKING ON SLOPES WARNING Any movement of the machine when the operator is not on board may cause serious accidents and even death; to prevent this, carry out the operations described below. Park on slopes only when it is absolutely necessary. Park only with the front bucket directed downwards.
  • Page 141 STOPPING THE ENGINE 3.8 STOPPING THE ENGINE IMPORTANT The sudden stop of the engine while it is running shortens its life. Do not stop the engine suddenly, except in case of emergency. It is likewise recommended not to stop the engine suddenly if it has been running for a long period and is still hot;...
  • Page 142 TRANSPORTING THE MACHINE ON OTHER VEHICLES 3.9 TRANSPORTING THE MACHINE ON OTHER VEHICLES 3.9.1 LOADING AND UNLOADING THE MACHINE WARNING The loading and unloading of the machine on-off the means of transport must be carried out on a flat surface and at a safety distance from the edges of ditches or from the roadside. Block the means of transport by positioning wedges before and behind each wheel.
  • Page 143 TRANSPORTING THE MACHINE ON OTHER VEHICLES 6 - Fix the machine with tie-downs or chains (5) in the anchorage points (A - B) indicated by the pictograms (see "2.1.1 POSITION OF THE SAFETY PLATES"). 7 - Protect the end of the exhaust pipe (6). RKAB6350 RKAB3680 3.9.2 TRANSPORT...
  • Page 144 It is not necessary to wash the cooling circuit. 4 - In case of doubt regarding the applicable standards for the use of permanent antifreeze, contact your Komatsu Dealer, who will supply you with exhaustive and precise information. https://tractormanualz.com...
  • Page 145 PRECAUTIONS TO BE TAKEN IN THE COLD SEASON 3.10.3 BATTERY WARNING To avoid explosions due to the presence of gas, do not provoke sparks and do not use naked flames near the battery. The battery electrolyte is dangerous. If it comes in contact with the eyes or the skin, immediately rinse with plenty of water and consult a doctor without delay.
  • Page 146 PRECAUTIONS TO BE TAKEN AT THE END OF THE WINTER 3.11 PRECAUTIONS TO BE TAKEN AT THE END OF THE WINTER 1 - At the end of the cold season, change lubricants and fuel. IMPORTANT The use of permanent antifreeze requires only the check of the level and the periodical change of the fluid.
  • Page 147 USING THE MACHINE AS A LOADER 3.12 USING THE MACHINE AS A LOADER WARNING Always fasten the safety belt. When the declutch push button is used, the machine keeps moving in neutral; to stop it, put on the brakes. The brake pedals can be used separately to reduce the steering radiuses; adopt this solution only if absolutely necessary, at low speed and with lowered bucket.
  • Page 148 USING THE MACHINE AS A LOADER 3.12.2.1 LOADING HEAPED AND LEVEL RKA16860 MATERIAL The efficiency of the bucket depends on how the operator starts loading; proceed as follows: 1 - Start moving and direct the bucket towards the heap base. 2 - While the upper material falls down filling the bucket, lift the arm gradually and at the same time fold the bucket completely.
  • Page 149 USING THE MACHINE AS A LOADER 3.12.2.2 LOADING OPERATIONS ON SLOPES WARNING Travel uphill with the bucket directed forward; the same rule must be followed when loading. Travel downhill in reverse with the loader directed forward and lowered bucket. Move changing direction very slowly, with the bucket as low as possible. Avoid any transverse position with respect to the slope directrix.
  • Page 150 USING THE MACHINE AS AN EXCAVATOR 3.13 USING THE MACHINE AS AN EXCAVATOR WARNING The machine can be used as an excavator only after rotating the seat by 180° with respect to the correct driving position; for the specific procedure, see "3.13.2 POSITIONING THE MACHINE FOR DIGGING OPERATIONS".
  • Page 151 USING THE MACHINE AS AN EXCAVATOR 3.13.2 POSITIONING THE MACHINE FOR DIGGING OPERATIONS WARNING Before moving the equipment, make sure that no one is standing in the work area. Before moving the equipment, make sure that the stabilizers are lowered. Before raising the stabilizers, fold the equipment completely or rest it onto the ground.
  • Page 152 USING THE MACHINE AS AN EXCAVATOR 3.13.3 SLIDING THE BACKHOE UNIT SIDEWARDS IMPORTANT Before moving the backhoe unit, make sure that the sliding guides are clean and lubricated with grease. 1 - Press the button again (LED off) to release the controls (see "3.3.2 pos. 12 - SERVO CONTROL LOCKING BUTTON").
  • Page 153 USING THE MACHINE AS AN EXCAVATOR 3.13.4 DIGGING METHOD WARNING The geometry of the rotation fulcrum of boom, arm and bucket make it possible to dig even beyond the stabilizer line, which makes the ground give way. Do not dig beyond the boom fulcrum line, since the ground may collapse and cause the machine to overturn.
  • Page 154 USING THE MACHINE AS AN EXCAVATOR 3.13.4.1 CHANGING THE BACKHOE BUCKET WARNING When the coupling pins are removed or installed, chips may come off; always use gloves, goggles and helmet. The change of the equipment must be carried out by two operators, who must decide together the words and signals to be used during work.
  • Page 155 LONG PERIODS OF INACTIVITY 3.14 LONG PERIODS OF INACTIVITY 3.14.1 PREPARING THE MACHINE FOR A LONG PERIOD OF INACTIVITY WARNING When draining the fuel, do not smoke, nor use naked flames near the machine. Place a container under the machine to gather the fuel and prevent it from spreading around. If some fuel should be spilled, clean the dirty area immediately.
  • Page 156 LONG PERIODS OF INACTIVITY 3.14.2 PREPARING THE ENGINE FOR A LONG PERIOD OF INACTIVITY NOTE These operations must be carried out only if the engine is going to remain unused for more than 1 month. The first two operations must be carried out only on engines that have already run for more than 200 hours. 1 - Drain the oil from the oil pan and fill it with washing oil FIAT L35.
  • Page 157 LONG PERIODS OF INACTIVITY 3.14.4 RESTARTING THE ENGINE NOTE These operations must be carried out if the machine has been prepared for a period of inactivity longer than 1 month. 1 - Remove the seals from the exhaust pipe and the filler cap. 2 - Open the engine hood and the cab.
  • Page 158 TROUBLESHOOTING 3.15 TROUBLESHOOTING 3.15.1 HOW TO REMOVE THE MACHINE DANGER The removal of the machine in case of failure always involves risks that may cause injuries to the persons responsible for this type of operation. When removing the machine, use a wire rope suitable for the weight of the machine to be removed.
  • Page 159 TROUBLESHOOTING 3.15.3 IF THE BATTERY IS DOWN WARNING When checking or carrying out any operation on the battery, stop the engine and make sure that the ignition key is in position « ». The battery produces hydrogen, which may explode. Do not use naked flames and do not smoke near the battery, and avoid producing sparks.
  • Page 160 TROUBLESHOOTING 3.15.3.1 STARTING WITH BOOSTER CABLES WARNING When starting the engine with the aid of another machine, connect the batteries in parallel. When connecting the cables, avoid any contact between the positive cable (+) and the negative cable (–). When starting the engine with booster cables, always wear safety goggles. Take care to avoid any contact between the machine to be started and the machine used as starting aid, in order to avoid sparks and therefore the explosion of the hydrogen produced by the batteries.
  • Page 161 3.15.4 OTHER TROUBLES (•) Always contact your Komatsu Dealer when you have to carry out this operation. • If the anomaly or its cause is not included in the table below, contact your Komatsu Dealer for the necessary repair. 3.15.4.1 ELECTRICAL CIRCUIT...
  • Page 162 3.15.4.3 BRAKING SYSTEM TROUBLE CAUSE REMEDY • Brake discs worn. (•) Change. Braking not regular for both wheels: • No oil in brake pump. (•) Top up and bleed circuit. • Air in braking circuit. (•) Bleed circuit. • Air in braking circuit. (•) Bleed circuit.
  • Page 163 TROUBLE CAUSE REMEDY • Fluid level low, fluid leakages. • Top up, repair. • Fan belt slackened. • Check belt tension. Steam comes out of radiator breather • Radiator fins damaged or closed. • Repair or clean. pipe: • Faulty thermostat. (•) Change.
  • Page 164 THIS PAGE WAS INTENTIONALLY LEFT EMPTY https://tractormanualz.com...
  • Page 165 MAINTENANCE https://tractormanualz.com...
  • Page 166 Carry out any maintenance operation on firm and level ground, after applying the parking brake. Use Komatsu genuine oils and greases; choose oils suitable for the ambient temperature. Use clean oils and greases. Keep the oil and grease containers clean and prevent any foreign matter from getting into them.
  • Page 167 GUIDE TO MAINTENANCE When the worksite is particularly dusty, proceed as follows: 1 - Check the air filter for any clogging and clean it more frequently than usual. 2 - Clean the radiator and the heat exchanger frequently, to avoid any clogging of the fins. 3 - Change the diesel oil filter more frequently than usual.
  • Page 168 4.2 MAINTENANCE NOTES Use only Komatsu genuine spare parts. Do not mix different types of oil. Unless specified otherwise, the oils and the coolant used by Komatsu to fill the tanks before the delivery of the machine are the following: TANK /RESERVOIR SPECIFICATIONS •...
  • Page 169 Do not use corrosion inhibitors containing soluble oil, since they damage the rubber couplings. In case of doubt regarding the applicable standards for the use of antifreeze, contact your Komatsu Dealer, who will supply you with exhaustive and precise information.
  • Page 170 2 - check of the battery electrolyte level. Do not remove or eliminate any electric component installed on the machine and do not install any electric component with characteristics different from those specified and approved by Komatsu. Keep the electric system dry.
  • Page 171 The parts subject to wear such as filters, bucket teeth, etc. must be replaced according to the periodic maintenance intervals prescribed or when they reach the wear limit. The timely change of these parts ensures an economic use of the machine. Use only Komatsu genuine parts, which alone can guarantee excellent quality and interchangeability. CHANGE ITEM...
  • Page 172 FUEL, COOLANT AND LUBRICANTS 4.3 FUEL, COOLANT AND LUBRICANTS AMBIENT TEMPERATURE CAPACITY (l) TANK / FLUID 50°C RESERVOIR TYPE 1st filling Change 104 122°F ACEA E5 SAE 5W-30 ACEA E4 Engine oil pan API CI-4 SAE 15W-40 ACEA E7 Hydraulic API CD, CF, SAE 10W-30 system...
  • Page 173 Use engine oil with API CI-4 o ACEA E7, E5, E4 classification, to ensure the correct and constnat operation of the engine. Use Komatsu genuine products whose characteristics have been specifically formulated and approved for use in the engine, in the work equipment hydraulic circuit, in the transmission, in the axles and in the brakes.
  • Page 174 FUEL, COOLANT AND LUBRICANTS 4.3.2 HOMOLOGATED SYNTHETIC BIODEGRADABLE LUBRICANTS “HEES” Komatsu machines can be filled with synthetic biodegradable hydraulic oil type HEES not of plant origin and therefore the use of the oils indicated in the following table is authorized and recommended: SUPPLIER SYNTHETIC BIODEGRADABLE OIL “HEES”...
  • Page 175 If not specified otherwise, tighten screws and nuts with the torque indicated in the table. If it is necessary to replace a screw or a nut, always use Komatsu original spare parts of the same size as those to be replaced.
  • Page 176 HOSES WITH ORFS If not specified otherwise, tighten hose nuts with the torque indicated in the table. If it is necessary to replace a hose, always use Komatsu original spare parts of the same size as those to be replaced. RKA12600 a Nm (Newton metre): 1 Nm = 0.102 Kgm...
  • Page 177 LUBRICATION 4.5 LUBRICATION 4.5.1 LUBRICATION DIAGRAM IMPORTANT For the lubrication of specific components, see "4.7 MAINTENANCE PLAN". The type of lubricant to be used is indicated in the lubricant chart (see "4.3 FUEL, COOLANT AND LUBRICANTS"). RKA17230 check change 250h 500h 1000h 2000h...
  • Page 178 LUBRICATION 4.5.2 LUBRICATION DIAGRAM (4in1 bucket and pallet forks) IMPORTANT For the other greasing points, see "4.5.1 LUBRICATION DIAGRAM". The points indicated are symmetrical and must be lubricated every 10 hours of operation. The fork sliding bars and the safety pins must be lubricated with grease only to protect them from oxidation.
  • Page 179 LUBRICATION 4.5.3 LUBRICATION DIAGRAM (front bucket quick couplings) IMPORTANT For the other greasing points, see "4.5.1 LUBRICATION DIAGRAM". The points indicated are symmetrical and must be lubricated every 10 hours of operation. 10 h RWAA9200 Grease https://tractormanualz.com...
  • Page 180 LUBRICATION 4.5.4 LUBRICATION DIAGRAM (offset device) IMPORTANT For the other greasing points, see "4.5.1 LUBRICATION DIAGRAM". 10 h RKA14130 Grease https://tractormanualz.com...
  • Page 181 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS To ensure safety at any moment while driving and using the machine, the operator must carry out all the routine maintenance operations prescribed. Furthermore, the operator must periodically change the components indicated in the table in the following page, which are especially related to safety and fire-prevention rules.
  • Page 182 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1 SAFETY RELATED PARTS NOTE For the quantities and codes of the safety related components to be changed, see the spare parts catalogue. When changing pipes, always change O rings, gaskets and analogous components. 4.6.1.1 FUEL SYSTEM Safety related components that periodically need Q.ty...
  • Page 183 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1.2 DELIVERY HYDRAULIC SYSTEM Safety related components that periodically need Q.ty Change interval changing Every 2 years or 4000 hours, Hydraulic pipe (Loader distributor – backhoe distributor) whichever occurs firs RKA14160 https://tractormanualz.com...
  • Page 184 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1.3 FRONT LOADER HYDRAULIC SYSTEM Safety related components that periodically need Q.ty Change interval changing Hydraulic pipes (Cylinders – loader arm) Every 2 years or 4000 hours, Hydraulic pipes (Cylinders – loader bucket) whichever occurs firs Hydraulic pipes (Cylinders –...
  • Page 185 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1.4 BACKHOE HYDRALIC SYSTEM Safety related components that periodically need Q.ty Change interval changing Hydraulic pipes (Cylinder – backhoe boom) Every 2 years or 4000 hours, Hydraulic pipes (Cylinder – backhoe boom) whichever occurs firs Hydraulic pipes (cylinder –...
  • Page 186 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1.5 OPERATOR’S SAFETY Safety related components that Change Q.ty periodically interval need changing Safety belt. Every 4 years RWA31240 https://tractormanualz.com...
  • Page 187 MAINTENANCE PLAN 4.7 MAINTENANCE PLAN WHEN REQUIRED CHECKING, CLEANING OR CHANGING THE ENGINE AIR FILTERS................187 CHECKING AND CLEANING THE CAB AIR FILTER ..................... 188 CHECKING AND CLEANING THE AIR RECIRCULATION FILTER (only for machines with air conditioner) ....189 CHECKING THE DETERGENT LEVEL IN THE WINDSHIELD WASHER RESERVOIR ..........
  • Page 188 MAINTENANCE PLAN MAINTENANCE EVERY 250 HOURS OF OPERATION CHECKING THE ALTERNATOR-FAN BELT ........................206 CHECKING AND ADJUSTING THE A/C COMPRESSOR BELT TENSION (only for machines with air conditioner) .......... 207 CHECKING THE BATTERY ELECTROLYTE LEVEL...................... 208 CHECKING THE FRONT AXLE OIL LEVELS......................... 209 CHECKING THE REAR AXLE OIL LEVEL........................

  • Page 189: When Required

    MAINTENANCE PROCEDURES 4.8 MAINTENANCE PROCEDURES 4.8.1 WHEN REQUIRED 4.8.1.a CHECKING, CLEANING OR CHANGING THE ENGINE AIR FILTERS WARNING Remove the air filter only after stopping the engine and do not start the engine if the air filter is open. Wear safety goggles during the cleaning operations. IMPORTANT The air filtering system consists of a primary filtering RKAB3690...

  • Page 190: Checking And Cleaning The Cab Air Filter

    MAINTENANCE PROCEDURES 8 - Put back the cover (2), turning it clockwise by approximately 12.5°. Make sure that the cover (2) is perfectly locked and make sure that the ejector (5) is positioned vertically on the lower part. 9 - Once the whole has been assembled, push the safety retainer (1) toward the inside.

  • Page 191: Checking And Cleaning The Air Recirculation Filter (Only For Machines With Air Conditioner)

    MAINTENANCE PROCEDURES 4.8.1.c CHECKING AND CLEANING THE AIR RECIRCULATION FILTER (only for machines with air conditioner) WARNING Wear safety goggles during the cleaning operations. If the machine is provided with air conditioning system, in addition to the external filter there is also an internal filter (3) for internal air recirculation.

  • Page 192: Checking The Windshield Wiper Blades

    MAINTENANCE PROCEDURES 4.8.1.e CHECKING THE WINDSHIELD WIPER BLADES The windshield wiper blades should be checked once the windshield wipers have stopped working, by verifying the conditions of the windshield. If any lines are left on the windshield after washing and wiping it, this means that the scraping wire has deteriorated and therefore it is necessary to change the blades.

  • Page 193: Bleeding The Braking Circuit

    MAINTENANCE PROCEDURES 4.8.1.h BLEEDING THE BRAKING CIRCUIT WARNING Oil spilled on the floor may cause the floor to become slippery; immediately clean any dirty area. The braking system must be bled with the machine positioned on level ground, the loader arm completely lowered, the backhoe boom in transport position and the parking brake applied.

  • Page 194: Checking And Adjusting The Wheel Toe-In

    4 - Accelerate until reaching the maximum speed. 5 - Press the brake pedals. The machine must brake smoothly, on a straight line, and the tension of the pedals must be constant. Otherwise, contact your Komatsu Dealer. RKAB2810 https://tractormanualz.com...

  • Page 195: Checking And Adjusting The Parking Brake

    MAINTENANCE PROCEDURES 4.8.1.k CHECKING AND ADJUSTING THE PARKING BRAKE IMPORTANT During running-in, check the efficiency of the parking brake after the first 100 hours of operation. CHECK Check conditions 20% (1/5) Tyre pressure in accordance with the prescribed values. 11° 20' Road surface dry, compact, with a gradient of approx.

  • Page 196: Checking And Adjusting The Brake Pedal Stroke

    MAINTENANCE PROCEDURES 4.8.1.l CHECKING AND ADJUSTING THE BRAKE PEDAL STROKE This check must be carried out when operating on the braking unit in order to eliminate any trouble. To check and adjust the brake pedal stroke, proceed as follows: 1 - Insert the connection pin (1) in order to couple the pedals. 2 - By acting on the end-of-stroke rubber pads (2), position the pedals in correspondence with measure “A”...

  • Page 197: Checking And Adjusting The Stabilizer Slack

    MAINTENANCE PROCEDURES 4.8.1.n CHECKING AND ADJUSTING THE STABILIZER SLACK WARNING When leaving the operator’s seat during the adjustment of the guides, remove the ignition key. 1 - Position the machine on level ground, raise the stabilizers completely, engage all the safety locks and stop the engine. 2 - Push and pull each stabilizer manually and make sure that RKA14210 the slack between the mobile rod (1) and the adjusting...

  • Page 198: Maintenance Intervals In Case Of Use Of The Demolition Hammer

    MAINTENANCE PROCEDURES 4.8.2 MAINTENANCE INTERVALS IN CASE OF USE OF THE DEMOLITION HAMMER In machines equipped with demolition hammer hydraulic oil deteriorates more rapidly than in machines used for simple digging operations. When using the demolition hammer, always keep to the following maintenance plan. 4.8.2.a CHANGING THE HYDRAULIC OIL FILTER In new machines, change the filter after the first 100÷150 hours of...

  • Page 199: Checks To Be Carried Out Before Starting The Engine

    Dirt, oil and fuel in the engine compartment near hot parts may damage the machine and even cause fires. Check frequently and eliminate any leakage; if leakages occur repeatedly, contact your Komatsu Dealer. Before starting the engine, proceed as follows: Check for loose screws or nuts.

  • Page 200: Checking The Fuel Level

    MAINTENANCE PROCEDURES 4.8.3.c CHECKING THE FUEL LEVEL WARNING When refuelling, avoid spilling fuel, since this may cause a fire hazard. If fuel is spilled, wipe it up immediately. Fuel is flammable; do not use naked flames and do not smoke when refuelling. Hold the fuel gun constantly in contact with the filler.

  • Page 201: Maintenance Every 10 Hours Of Operation

    MAINTENANCE PROCEDURES 4.8.4 MAINTENANCE EVERY 10 HOURS OF OPERATION 4.8.4.a LUBRICATING THE JOINTS IMPORTANT Clean the grease nipples before applying the grease pump. After lubrication, remove all the contaminated grease that may have spread out of the nipples. If the machine is used in difficult conditions, carry out this operation more frequently than usual. This maintenance operation must be carried out with the front bucket resting on the ground and the backhoe equipment completely extended and resting on the ground, too, as indicated in the figure.
  • Page 202 MAINTENANCE PROCEDURES POINTS TO BE LUBRICATED ON THE BACKHOE RKA14250 1 - Boom swing cylinder base pin (4 points) 2 - Boom swing fulcrum pin (2 points) 3 - Lifting cylinder head and boom locking lever fulcrum pin (3 points) 4 - Lifting cylinder base and arm pin (3 points) 5 - Telescopic arm extension cylinder base pin...

  • Page 203: Maintenance After The First 50 Hours Of Operation (Only For Machines In Which Synthetic Biodegradable Oil Type Hees Is Used)

    IMPORTANT Do not exceed the MAX. reference mark. This would damage the hydraulic circuit and cause the oil to overflow. If you notice a constant, unusual decrease in the oil level, RKAB3830 contact your Komatsu Dealer. RKAB3840 https://tractormanualz.com...

  • Page 204: Checking The Fluid Level In The Radiator

    (see "4.3 FUEL, COOLANT AND LUBRICANTS"). IMPORTANT Use new oil only. If constant and considerable leakages are observed, it is advisable to contact a Komatsu Dealer to have the system checked and the necessary repairs carried out. RKAB6430 RKAB3870 RKAB3880...

  • Page 205: Lubricating The Propeller Shafts

    MAINTENANCE PROCEDURES 4.8.6.d LUBRICATING THE PROPELLER SHAFTS WARNING Carry out this operation with the machine parked on a level surface, the work equipment resting on the ground and the engine off. The propeller shafts must be lubricated after thoroughly cleaning the grease nipples, by applying the grease pump filled with the prescribed grease.

  • Page 206: Lubricating The Front Axle Joints And Central Coupling And The Rear Axle Joints

    MAINTENANCE PROCEDURES 4.8.6.e LUBRICATING THE FRONT AXLE JOINTS AND CENTRAL COUPLING AND THE REAR AXLE JOINTS I punti di lubrificazione (1) degli snodi ruota sono indicati nella figura ed è bene ricordare che sono disposti sulla macchina in modo simmetrico, mentre lo snodo centrale viene lubrificato con gli ingrassatori (2) montati sul telaio.

  • Page 207: Draining The Water Separator

    MAINTENANCE PROCEDURES 4.8.6.g DRAINING THE WATER SEPARATOR WARNING Fuel is flammable; do not use naked flames and do not smoke while draining the water separator. If some fuel is spilled, wipe it up immediately. This operation serves to drain the condensate and must be carried out with full tank, in order to prevent air from entering the fuel circuit.

  • Page 208: Maintenance After The First 250 Hours Of Operation

    For further details, see sections "4.8.10 MAINTENANCE EVERY 500 HOURS OF OPERATION" and "4.8.11 MAINTENANCE EVERY 1000 HOURS OF OPERATION". For checks and adjustments, contact your Komatsu Dealer. 4.8.8 MAINTENANCE EVERY 250 HOURS OF OPERATION Carry out the following operations together with those to be performed every 50 HOURS.

  • Page 209: Checking And Adjusting The A/C Compressor Belt Tension (Only For Machines With Air Conditioner)

    MAINTENANCE PROCEDURES 4.8.8.b CHECKING AND ADJUSTING THE A/C COMPRESSOR BELT TENSION (only for 5-6mm 10 kg machines with air conditioner) WARNING The coolant used in the air conditioning system is very dangerous. If it is sprayed into the eyes or in case of contact with the skin, it may cause blindness or frostbite.

  • Page 210: Checking The Battery Electrolyte Level

    MAINTENANCE PROCEDURES 4.8.8.c CHECKING THE BATTERY ELECTROLYTE LEVEL WARNING Carry out this check with the machine parked on level ground. Check the level only after stopping the engine and if necessary add distilled water only before starting work. Always wear safety goggles and waterproof gloves. RKAB6450 To prevent gas explosions, do not use naked flames, do not smoke and avoid producing sparks due to short...

  • Page 211: Checking The Front Axle Oil Levels

    MAINTENANCE PROCEDURES 4.8.8.d CHECKING THE FRONT AXLE OIL LEVELS WARNING Carry out this check with the machine parked on a level surface and the work equipment resting on the ground. DIFFERENTIAL This check is visual and serves to verify if the lubricant reaches the hole (1);...

  • Page 212: Checking The Hydraulic Transmission Oil Level

    MAINTENANCE PROCEDURES 4.8.8.f CHECKING THE HYDRAULIC TRANSMISSION OIL LEVEL MAX. WARNING MIN. Change the oil with the machine parked on level ground and lifted loader arm with engaged safety lock. The level must be checked with running engine and transmission oil at operating temperature; be very careful, in order to avoid burns.

  • Page 213: Changing The Engine Oil

    MAINTENANCE PROCEDURES 4.8.9 MAINTENANCE AFTER THE FIRST 500 HOURS OF OPERATION (Only for machines in which synthetic biodegradable oil type HEES is used) The following maintenance operation must be carried out after the first 500 hours, together with the maintenance operations to be carried out “EVERY 500 HOURS”.

  • Page 214: Changing The Hydraulic System Oil Filter

    MAINTENANCE PROCEDURES 4.8.10.b CHANGING THE ENGINE OIL FILTER WARNING Soon after the machine has been stopped the engine oil is very hot and may cause burns; let the engine cool down until it reaches a temperature of 40–45°C before draining the oil. The oil that may be spilled during the oil change will make the ground slippery, therefore use anti-slip shoes and immediately remove any trace of oil from the floor.
  • Page 215 MAINTENANCE PROCEDURES The filter is positioned on the hydraulic system drain outlet and it holds the metal particles that come off the various components due to their wear. It is positioned on the right side of the machine, under the battery compartment, and can be reached after opening the door (1).
  • Page 216 MAINTENANCE PROCEDURES IMPORTANT In machines equipped with demolition hammer hydraulic oil deteriorates more rapidly than in machines used for Replacement interval simple digging operations. for element On new machines, change the filter after the first 100-150 hours of operation and for the successive changes keep to the indications given in the table on the right.

  • Page 217: Changing The Fuel Filter

    MAINTENANCE PROCEDURES 4.8.10.d CHANGING THE FUEL FILTER WARNING Change the filtering element after work, when the engine has cooled down to 40–45°C. During these operations some fuel may be spilled; clean the dirty areas immediately, in order to prevent any risk of slipping or fire. Oils, filters, the coolant and the battery are considered special waste and must be collected and disposed of according to the regulations in force.

  • Page 218: Draining The Fuel Tank

    MAINTENANCE PROCEDURES 4.8.10.e DRAINING THE FUEL TANK WARNING When draining the fuel tank, avoid spilling fuel, since this may cause fires. If some fuel is accidentally spilled, clean the dirty area immediately, in order to prevent it from getting slippery and to avoid fires. Do not smoke and do not use naked flames when carrying out this operation.

  • Page 219: Draining The Hydraulic Oil Tank (Only For Machines In Which Synthetic Biodegradable Oil Type Hees Is Used)

    MAINTENANCE PROCEDURES 4.8.10.f DRAINING THE HYDRAULIC OIL TANK (only for machines in which synthetic biodegradable oil type HEES is used) WARNING After stopping the engine, with the machine in the correct position for the performance of maintenance operations, eliminate the residual pressure from the equipment (by moving the controls more than once) and from the tank (by slowly loosening the filler cap).

  • Page 220: Cleaning The Outside Of The Radiator

    MAINTENANCE PROCEDURES 4.8.10.g CLEANING THE OUTSIDE OF THE RADIATOR WARNING If compressed air, steam or water are directed against a person, they may cause injuries. Wear goggles and safety shoes. To clean the outside of the radiator it is first necessary to loosen the screws (2) and remove the guard (1) positioned on the front of the engine hood.

  • Page 221: Cleaning The Outside Of The A/C Condenser (Only For Machines With Air Conditioner)

    MAINTENANCE PROCEDURES 4.8.10.h CLEANING THE OUTSIDE OF THE A/C CONDENSER (only for machines with air conditioner) WARNING If compressed air, steam or water are directed against a person, they may cause injuries. Wear goggles and safety shoes. Always wear an eye shield and safety shoes. The condenser (1) must be cleaned at the same at as the radiator (see "4.8.10.g CLEANING THE OUTSIDE OF THE RADIATOR").

  • Page 222: Changing The Front Axle Oil

    MAINTENANCE PROCEDURES 4.8.11 MAINTENANCE EVERY 1000 HOURS OF OPERATION Carry out these operations together with those to be performed every 50, 250, 500 HOURS. 4.8.11.a CHANGING THE FRONT AXLE OIL WARNING Change the oil with the machine parked on a level surface and the work equipment resting on the ground.

  • Page 223: Changing The Rear Axle Oil

    MAINTENANCE PROCEDURES 4.8.11.b CHANGING THE REAR AXLE OIL WARNING Change the oil with the machine parked on a level surface and the work equipment resting on the ground. Oils, filters, the coolant and the battery are considered special waste and must be collected and disposed of according to the regulations in force.

  • Page 224: Changing The Hydraulic Transmission Oil

    MAINTENANCE PROCEDURES 4.8.11.c CHANGING THE HYDRAULIC TRANSMISSION OIL WARNING Change the oil with the machine parked on level ground and lifted loader arm with engaged safety lock. The hydraulic transmission oil must be drained at operating temperature, which is very high, and may cause severe burns;...

  • Page 225: Changing The Hydraulic Transmission Oil Filter

    MAINTENANCE PROCEDURES 4.8.11.d CHANGING THE HYDRAULIC TRANSMISSION OIL FILTER WARNING Soon after the machine has been stopped the transmission unit is very hot and may cause burns; let the machine cool down before changing the filter. The oil that may be spilled during the filter change will cause the floor to become slippery;...

  • Page 226: Changing The Hydraulic Oil And Cleaning The Intake Filter

    MAINTENANCE PROCEDURES 4.8.12 MAINTENANCE EVERY 2000 HOURS OF OPERATION Carry out these operations together with those to be performed every 50, 250, 500 and 1000 HOURS. 4.8.12.a CHANGING THE HYDRAULIC OIL AND CLEANING THE INTAKE FILTER CAUTION On machines containing synthetic biodegradable hydraulic oil type HEES, this must be changed after the first 500 hours of operation and successively every 2000 hours, and in any case at least once a year.
  • Page 227 MAINTENANCE PROCEDURES 9 - Change the drain filter (see "4.8.10.c CHANGING THE HYDRAULIC SYSTEM OIL FILTER"). 10 - Put back the drain plugs (2) and (3) and fill the oil tank with the prescribed oil until reaching the correct level. 11 - Raise the front mat and remove the cover (9).

  • Page 228: Changing The Coolant

    MAINTENANCE PROCEDURES 4.8.12.b CHANGING THE COOLANT CAUTION Change the coolant every 2000 hours of operation or every 2 years, whichever occurs first. WARNING Soon after the machine has been stopped the coolant is very hot and under pressure and it may cause serious RKAB3860 burns;...

  • Page 229: Changing The Braking System Oil

    MAINTENANCE PROCEDURES 4.8.12.c CHANGING THE BRAKING SYSTEM OIL WARNING Oil spilled on the floor may cause the floor to become slippery; immediately clean any dirty area. Oils, filters, the coolant and the battery are considered special waste and must be collected and disposed of according to the regulations in force.

  • Page 230: Checking The Alternator And The Starter

    MAINTENANCE PROCEDURES 4.8.12.d CHECKING THE ALTERNATOR AND THE STARTER This procedure must be carried out by qualified personnel. Have this operation performed by your Komatsu Dealer. 4.8.12.e CHANGING THE ALTERNATOR BELT This procedure must be carried out by qualified personnel. Have this operation performed by your Komatsu Dealer.

  • Page 231: Maintenance Every 3000 Hours Of Operation

    Carry out these operations together with those to be performed every 50, 250, 500 and 1000 HOURS. 4.8.13.a CHECKING THE ENGINE RETAINING SCREWS AND DAMPING ELEMENTS This procedure must be carried out by qualified personnel. Have this operation performed by your Komatsu Dealer.

  • Page 232: Maintenance Every 4000 Hours Of Operation

    (Only for machines with air conditioner) Specific equipment is required to check the operating conditions of the compressor (1); have the compressor checked only by specialized personnel and for this purpose contact your Komatsu Dealer. RKAB5020 4.8.14.c CHANGING THE ENGINE THERMOSTATIC VALVE This procedure must be carried out by qualified personnel.
  • Page 233 TECHNICAL SPECIFICATIONS https://tractormanualz.com...
  • Page 234 TECHNICAL DATA 5.1 TECHNICAL DATA 5.1.1 STANDARD OVERALL DIMENSIONS 5.1.1.1 OVERALL DIMENSIONS WITH STANDARD ARM 2190 2175 1670 2420 6035 RKA17020 5.1.1.2 OVERALL DIMENSIONS WITH TELESCOPIC ARM 2190 2175 1670 2420 6035 RKA17030 https://tractormanualz.com...
  • Page 235 Komatsu diesel engine model ........
  • Page 236 TECHNICAL DATA FRONT TYRES SIZE MAKE INFLATION PRESSURE Recommended 16.9-24 PR12 ISGT Good Year bar 2,20 16.9-R24 XM37 148A8/145B Michelin bar 3,10 16.9-28 PR12 ISGT Good Year bar 2,20 16.9R28 XM37 Michelin bar 3,10 440/80-R28 Nokian bar 3,20 REAR TYRES SIZE MAKE INFLATION PRESSURE...
  • Page 237 TECHNICAL DATA 5.1.3 LIFTING CAPACITIES IMPORTANT According to the harmonized standard EN474-5 (§ 4.1.7.5), the machine cannot lift weights exceeding 1000 kg, unless it is provided with appropriate equipment. Carry out lifting operations only with the machine positioned on firm and flat ground. 5.1.3.1 SYMBOL TABLE 2200 A - Standard arm length L= 2200 mm...
  • Page 238 TECHNICAL DATA 5.1.3.2 LIFTING CAPACITIES (STANDARD ARM) RKA17150 = 8040 Kg > 10 0 0 Kg W= 600 mm = 160 Kg 24.5 MPa (245 Bar) 2200 -1 m -1 m -1 m https://tractormanualz.com...
  • Page 239 TECHNICAL DATA 5.1.3.3 LIFTING CAPACITIES (BOOM WITH OFFSET DEVICE) https://tractormanualz.com...
  • Page 240 THIS PAGE WAS INTENTIONALLY LEFT EMPTY https://tractormanualz.com...
  • Page 241 AUTHORISED OPTIONAL EQUIPMENT https://tractormanualz.com...
  • Page 242 The installation of optional accessories and equipment other than those authorized by Komatsu shortens the life of the machine and may also cause safety problems. It is advisable to contact a Komatsu Dealer before installing any accessory that is not mentioned in this operation and maintenance manual.
  • Page 243 AUTHORIZED OPTIONAL EQUIPMENT 6.1.3 CHARACTERISTICS OF THE OPTIONAL EQUIPMENT (Specific weight of the material handled = 1.8 tons/cu.m) LOADER MAX. DIMENSIONS MAX. MAX. MAX. MAX. OPERATING CAPACITY FLOW WEIGHT PRESSURE EQUIPMENT Width Height RATE (kg) (bar) (mm) (mm) (l/min. Front bucket 2320 —...
  • Page 244 FRONT EQUIPMENT QUICK COUPLING DEVICES 6.2 FRONT EQUIPMENT QUICK COUPLING DEVICES WARNING coupling uncoupling operations must performed on a firm and level surface. The method described is valid for all the front equipment whose operation does not require the use of pressurized oil.
  • Page 245 FRONT EQUIPMENT QUICK COUPLING DEVICES 6.2.2 HYDRAULIC QUICK COUPLING FOR STANDARD BUCKET The operations to be performed are those described in the previous paragraph (see "6.2.1 MANUAL QUICK COUPLING"), except for the backward movement and the engagement of the coupling pins, which are obtained by means of the push buttons (9) and (10) located on the lever (3).
  • Page 246 4in1 BUCKET 6.3 4in1 BUCKET IMPORTANT (For the characteristics, see table "6.1.3 CHARACTERISTICS OF THE OPTIONAL EQUIPMENT"). 6.3.1 DESCRIPTION AND CONTROLS The 4in1 bucket can be used for several applications and eliminates the need to use specific equipment. Compared to the standard bucket, it comprises a mobile jaw (4) that can be opened to unload the material with no need to swing the bucket itself.
  • Page 247 4in1 BUCKET 6.3.3 INSTALLING THE 4in1 BUCKET WARNING When the coupling pins are removed or installed, chips may come off; always use gloves, goggles and helmet. The change of the equipment must be carried out by two operators, who must decide together the words and signals to be used during work.
  • Page 248 4in1 BUCKET WARNING Wear thick gloves and safety goggles during this check. To check the system for leaks, use a piece of cardboard or a wooden board. 5 - Lower the bucket to the ground, stop the machine, lubricate the joints (See "4.5.2 LUBRICATION DIAGRAM (4in1 bucket and pallet forks)") and check the hydraulic oil level (see "4.8.6.a CHECKING THE HYDRAULIC OIL LEVEL").
  • Page 249 PALLET FORKS 6.4 PALLET FORKS IMPORTANT (For the characteristics, see table "6.1.3 CHARACTERISTICS OF THE OPTIONAL EQUIPMENT"). DANGER Before lifting the load, make sure that the position of its centre (G) complies with the distances indicated in the figure below. Furthermore, the load must always be centered with respect to the forks. Non- compliance with these rules may cause serious damage and even death.
  • Page 250 PALLET FORKS 6.4.2 SAFETY DEVICES Two safety pins (3) are provided to keep the forks in overturned position when the machine travels on roads and during work: • FOR TRAVEL ON ROADS (Only for machines with approval for travel on roads): make the forks slide towards the centre of the bucket, overturn them and insert them in the supports (5) as shown in Figure A.
  • Page 251 PALLET FORKS 6.4.3.1 PREPARING THE PALLET FORKS FOR 1 - Overturn the forks toward the front part of the machine. 2 - Lift the bucket and operate the control lever in such a way as to swing it forward until releasing the forks from the bucket teeth.
  • Page 252 PALLET FORKS 6.4.4 REMOVING THE FORKS WARNING Pay the utmost attention when removing the forks, the supports and the bar, in order not to crush or even cut off your hands or feet. 1 - Manoeuvre the lifting arm and swing the bucket until resting the forks (1) on the ground in horizontal position. 2 - Remove the safety pins (6) and the pins (7).
  • Page 253 BACKHOE TELESCOPIC ARM 6.5 BACKHOE TELESCOPIC ARM 6.5.1 DESCRIPTION AND CONTROL The telescopic arm makes it possible to work with the equipment installed at a variable distance that is greater than that allowed by the standard arm. When the telescopic arm is completely extended, the breakout force at the bucket pin is reduced and only lighter loads can be lifted;...
  • Page 254 BACKHOE TELESCOPIC ARM 6.5.2 SAFETY DEVICES RKAB5600 The telescopic arm is equipped with a safety element (5) that locks the sliding arm (2) when it is completely retracted and prevents any accidental extension of the same. The safety element (6), held in its seat by the retainer (7), must be inserted and prevent the extension of the arm as shown in Fig.
  • Page 255 BACKHOE TELESCOPIC ARM 6.5.4 MAINTENANCE The telescopic arm requires two maintenance operations: 1 - Lubrication of the joints (see "4.5.1 LUBRICATION DIAGRAM"). 2 - Adjustment of the slide guide (8) slack, which must be carried out occasionally, when impacts or vibrations are noticed during work.
  • Page 256 BACKHOE TELESCOPIC ARM CAUTION If the adjusting dowels (9) protrude to the same extent on 5 mm the two sides, the operation described at point 6 can be carried out either on the right or on the left side. 6 - Loosen the four lock nuts (10) and tighten the adjusting dowels (9) thoroughly, until taking up the slack completely.
  • Page 257 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 6.6 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER WARNING The demolition hammer is very noisy, therefore always wear headphones when using it. IMPORTANT For the characteristics, see table "6.1.3 CHARACTERISTICS OF THE OPTIONAL EQUIPMENT". 6.6.1 DESCRIPTION AND CONTROL The machine can be configured in such a way as to allow the installation of a demolition hammer on the backhoe;...
  • Page 258 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 6.6.2 USE OF THE DEMOLITION HAMMER AND RULES TO BE OBSERVED The choice of the suitable tool is a very important factor when maximum productivity is required of the demolition hammer. The shape and size of the tool must be defined according to the nature of the material to be broken and to the type of work to be carried out.
  • Page 259 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 4 - To facilitate the sliding of the tool on its seat, check the thrust direction and always correct the hitting position of the hammer by means of the bucket and arm control. RKA17080 5 - Always make sure that the arm thrust is optimal, in order to avoid harmful and useless strokes.
  • Page 260 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER ALWAYS AVOID THE FOLLOWING INCORRECT USES: 1 - Gathering or moving stones with the demolition hammer. RWA06460 2 - Rotating the upper structure while using the hammer. RKA17090 3 - Moving the tool while it is hitting the material to be broken. RWA06480 https://tractormanualz.com...
  • Page 261 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 4 - Working with the hammer in horizontal position or even with greater inclination. RKA14460 5 - Levering with the tool after driving it into the material to be broken. RWA06500 6 - Hitting the ground with the hammer bit. RKA17100 7 - Lifting the machine by levering on the hammer bit with the bucket cylinder completely extended.
  • Page 262 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 6.6.3 INSTALLING AND REMOVING THE DEMOLITION HAMMER 6.6.3.1 INSTALLING THE HAMMER WARNING The machine must be parked on a level surface, with the front equipment resting on the ground. For the installation, the hammer must be positioned horizontally, with the bit directed towards the machine.
  • Page 263 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 5 - Remove the plugs of the machine pipes and of the hammer TELESCOPIC flexible pipes. Use hex wrenches: 32, 36, 38 and 41 mm. 6 - Connect the right pipe to the coupling (1) and the left pipe to the coupling (2), making sure that the sizes of the pipe fittings are as required.
  • Page 264 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 6.6.3.2 REMOVING THE HAMMER To remove the hammer, proceed as follows: 1 - With the engine at rest, turn the ignition key to position « ». 2 - Press the servo control locking button and make sure that the LED is off (release position) (see "3.3.2 pos. 12 - SERVO CONTROL LOCKING BUTTON").
  • Page 265 APPLICATION OF THE OFFSET DEVICE 6.7 APPLICATION OF THE OFFSET DEVICE WARNING When it is necessary to move the machine or travel on roads, the offset device must be positioned centrally with respect to the boom axis. To carry out digging operations on vertical walls, the fulcrum pin (1) of the revolving support (2) must be perfectly vertical;...
  • Page 266 APPLICATION OF THE OFFSET DEVICE The movement of the equipment with offset boom is achieved via the buttons (6) and (7) positioned on the left joystick lever. The movements of the levers described in "3.3.5 pos. 18/19 - BACKHOE CONTROL LEVERS" remain unchanged. The movements of the arm are as follows: 1 - Swing to the left, obtained by pressing the push button (6);...
  • Page 267 CONFIGURATION FOR THE USE OF OPTIONAL EQUIPMENT WITH UNIDIRECTIONAL OIL FLOW 6.8 CONFIGURATION FOR THE USE OF OPTIONAL EQUIPMENT WITH UNIDIRECTIONAL OIL FLOW WARNING Some equipment that can be installed instead of the standard bucket make the machine unsuitable for travelling on roads.
  • Page 268 CONFIGURATION FOR THE USE OF OPTIONAL EQUIPMENT WITH UNIDIRECTIONAL OIL FLOW 6.8.2 INSTALLING AND CONNECTING THE EQUIPMENT The equipment must be installed following the procedure indicated in paragraph pos. 3.13.4.1 CHANGING THE BACKHOE BUCKET". Connect the delivery and return pipes by proceeding as follows: 1 - With the engine at rest, turn the ignition key to position «...
  • Page 269 CONFIGURATION FOR THE USE OF THE CLAMSHELL BUCKET 6.9 CONFIGURATION FOR THE USE OF THE CLAMSHELL BUCKET 6.9.1 DESCRIPTION AND CONTROL WARNING Machines equipped with the revolving clamshell bucket cannot travel on roads. The installation of the clamshell bucket must be carried out at the worksite; if the machine must travel on roads, remove the bucket.
  • Page 270 CONFIGURATION FOR THE USE OF THE CLAMSHELL BUCKET 6.9.2 INSTALLING THE CLAMSHELL BUCKET WARNING The machine must be parked on a level surface, with the front equipment resting on the ground. When the coupling pins are removed or installed, chips may come off;...
  • Page 271 CONFIGURATION FOR THE USE OF THE CLAMSHELL BUCKET CAUTION During the following steps, take care to prevent any impurities from getting into the pipes and the cylinder. If any oil has been spilled, wipe it up immediately, in order to prevent the surface from getting slippery. FOR STANDARD ARM (FIG.
  • Page 272 CONFIGURATION FOR THE USE OF THE HAND HYDRAULIC HAMMER 6.10 CONFIGURATION FOR THE USE OF THE HAND HYDRAULIC HAMMER WARNING The hand hydraulic hammer is very noisy; always wear headphones when using it. The hand hydraulic hammer transmits intense vibrations that may cause psychical and physical stress to the operator;...
  • Page 273 CONFIGURATION FOR THE USE OF THE HAND HYDRAULIC HAMMER 6.10.2 INSTALLING AND REMOVING THE HAND HAMMER WARNING The connection and removal of the hammer must be carried out with the machine parked on a level surface and the equipment resting on the ground, parking brake applied and control safety locks engaged.
  • Page 274 CONFIGURATION FOR THE USE OF THE HAND HYDRAULIC HAMMER 6.10.2.2REMOVING THE CONNECTIONS At the end of work, proceed as follows: 1 - Press the push button (4) to disconnect the circuit, reduce the engine rpm and stop the engine. 2 - With the engine at rest, turn the ignition key to position « ». 3 - Press the servo control locking button and make sure that the LED is off (release position) (see "3.3.2 pos.
  • Page 275 6.11.1 LOAD STABILIZER SYSTEM (LSS) ACCUMULATOR CAUTION If it is necessary to repair or change the accumulator of the load stabilizer system, contact your Komatsu Dealer. Failure to comply with this instruction may cause serious injury and even death. RKAB6520...
  • Page 276 RWA38560 special buckets, drills, hydraulic hammers or other equipment, provided that it is authorized by Komatsu. If necessary, the bucket can be attached to the quick coupling (1) even in reversed position, as shown in Fig. A.
  • Page 277 REAR EQUIPMENT MECHANICAL QUICK COUPLING DEVICE 6.12.1 EQUIPMENT COUPLING AND RWA38570 RELEASE PROCEDURE WARNING When the coupling pins are removed or installed, chips may come off; always use gloves, goggles and helmet. The change of the equipment must be carried out by two operators, who must decide together the words and signals to be used during work.
  • Page 278 REAR EQUIPMENT MECHANICAL QUICK COUPLING DEVICE Release procedure: 1 - Remove the safety pin (5) after removing the relevant retainer (6). 2 - Slightly lift the bucket from the ground and insert the release lever (9) in the apposite hole in the quick coupling (1). 3 - Exert a downward pressure with the release lever (9), until the coupling pin (3) disengages from its seat.
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  • Page 280 © 2006 KOMATSU UTILITY EUROPE S.p.A. All Rights Reserved Printed in Europe 02-2006 https://tractormanualz.com...

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