Komatsu Utility WB93R-5 Operation & Maintenance Manual
  1. Manuals
  2. Brands
  3. Komatsu Utility Manuals
  4. Compact Loader
  5. WB93R-5
  6. Operation & maintenance manual

Komatsu Utility WB93R-5 Operation & Maintenance Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
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.
WB93R
BACKHOE-LOADER
SERIAL NUMBER
WB93R-5 F50003
WEAM006000
-5
and up

Advertisement

Table of Contents
loading

Related Manuals for Komatsu Utility WB93R-5

Summary of Contents for Komatsu Utility WB93R-5

  • Page 1 Operation & Maintenance WEAM006000 Manual WB93R BACKHOE-LOADER SERIAL NUMBER WB93R-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 3: Foreword 1.1 Foreword

    FOREWORD 1.1 FOREWORD This manual has been produced by Komatsu Utility S.p.A. in order to supply their customers with all the neces- sary information on the machine and the safety regulations related to it, together with the use and maintenance instructions that enable the operator to exploit the capacity of the machine with optimal results and to keep the machine efficient over time.

  • Page 4: Information On Safety

    INFORMATION ON SAFETY 1.2 INFORMATION ON SAFETY Many accidents are caused by insufficient knowledge of and failure to comply with the safety regulations pre- scribed for the maintenance operations that must be performed on the machine. In order to avoid accidents, before starting work and before carrying out any maintenance operation, carefully read and be sure to understand all the information and warnings contained in this manual and given on the plates ap- plied onto the machine.
  • Page 5 INFORMATION ON SAFETY DANGER 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. DANGER To make the information clearer, some illustrations in this manual represent the machine without safety guards.

  • 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: HANDLING OF MATERIALS (4IN1 BUCKET - PALLET FORKS) SNOWPLOUGH (ANGLEDOZER BLADE - SNOWPLOUGH) DEMOLITION (HAND HAMMER - HAMMER ON THE BACKHOE)

  • Page 7: Main Characteristics

    INTRODUCTION 1.3.3 MAIN CHARACTERISTICS Simple and easy operation. Servo-assisted steering with priority hydraulic system. 4-gear mechanical gearshift and transmission with hydraulic converter; reversal controlled by a lever positioned under the steering wheel. Loader control through a single servo lever ensuring also combined movements that can be modulated propor- tionally and continually.

  • Page 8: Product Identification

    BAUJAHR - ANNEE MASSA TOTALE - TOTAL WEIGHT GESAMTGEWICHT - POIDS TOTAL POTENZA MOTORE - ENGINE POWER LEISTUNG - PUISSANCE MOTEUR Product Identification Number MANUFACTURED BY KOMATSU UTILITY EUROPE S.p.A. 37A-98-11820 36025 NOVENTA VICENTINA (VI) - ITALY 37A-98-11820 RKA14970 MODEL SERIAL N˚...

  • 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 TOTAL MASS WEIGHT FROM 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 follow- ing data: 1 - Engine type...

  • Page 11: Rear Axle Serial Number

    PRODUCT IDENTIFICATION 1.4.6 REAR AXLE SERIAL NUMBER The serial number of the rear axle is stamped on the plate po- sitioned on the right side of the axle body. RKAB2730 1.4.7 TRANSMISSION SERIAL NUMBER The transmission serial number is stamped on the plate pos- tioned on the right side of the transmission case.

  • 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:...

  • 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....................3.2.3.1 CAB INSIDE GENERAL VIEW (mechanical backhoe controls)......3.2.3.2 CAB INSIDE GENERAL VIEW (backhoe servo controls) ........
  • Page 16 TABLE OF CONTENTS 3.6.5.3 WORKING ON SLOPES ..................3.6.5.4 MAXIMUM IMMERSION DEPTH ................PARKING THE MACHINE ........................3.7.1 PARKING ON LEVEL GROUND ....................3.7.2 PARKING ON SLOPES......................STOPPING THE ENGINE ........................TRANSPORTING THE MACHINE ON OTHER VEHICLES ..............3.9.1 LOADING AND UNLOADING THE MACHINE................. 3.9.2 TRANSPORT..........................
  • Page 17 TABLE OF CONTENTS MAINTENANCE GUIDE TO MAINTENANCE ........................MAINTENANCE NOTES ........................4.2.1 NOTES REGARDING THE ENGINE ..................4.2.1.1 ENGINE OIL......................4.2.1.2 COOLANT ....................... 4.2.1.3 FUEL ........................4.2.2 NOTES REGARDING THE HYDRAULIC SYSTEM..............4.2.3 NOTES REGARDING THE ELECTRIC SYSTEM..............4.2.4 NOTES REGARDING LUBRICATION ..................4.2.5 PARTS SUBJECT TO WEAR THAT PERIODICALLY NEED CHANGING......
  • Page 18 TABLE OF CONTENTS 4.8.2.b CHANGING THE HYDRAULIC OIL ................ 4.8.3 CHECKS TO BE CARRIED OUT BEFORE STARTING THE ENGINE ........4.8.3.a VARIOUS CHECKS ....................4.8.3.b CHECKING THE COOLANT LEVEL............... 4.8.3.c CHECKING THE FUEL LEVEL ................4.8.3.d CHECKING THE ENGINE OIL LEVEL ..............4.8.4 MAINTENANCE EVERY 10 HOURS OF OPERATION ............
  • Page 19 TABLE OF CONTENTS 4.8.13.a CHECKING THE ENGINE RETAINING SCREWS AND DAMPING ELEMENTS .. 4.8.13.b CHECKING AND ADJUSTING THE ENGINE VALVE CLEARANCE AND THE INJECTION TIMING ADVANCE ..............4.8.14 MAINTENANCE EVERY 4000 HOURS OF OPERATION ............4.8.14.a CHANGING THE A/C DEWATERING FILTER (Only for machines with air conditioner) ..............
  • Page 20 TABLE OF CONTENTS CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER ......6.6.1 DESCRIPTION AND CONTROL ....................6.6.1.1 CONTROL (version with mechanically-controlled backhoe) ........6.6.1.2 CONTROL (version with servo-assisted backhoe)..........6.6.2 USE OF THE DEMOLITION HAMMER AND RULES TO BE OBSERVED ......6.6.3 INSTALLING AND REMOVING THE DEMOLITION HAMMER ..........

  • Page 21: Safety And Accident Prevention

    SAFETY AND ACCIDENT PREVENTION...

  • Page 22: Safety, Noise And Vibration Plates

    SAFETY, NOISE AND VIBRATION PLATES 2.1 SAFETY, NOISE AND VIBRATION PLATES 2.1.1 POSITION OF THE SAFETY PLATES The safety plates must always be legible and in good conditions; for this reason, if they are dirty with dust, oil or grease, it is necessary to clean them with a solution made of water and detergent. Do not use fuel, petrol or sol- vents.
  • Page 23 SAFETY, NOISE AND VIBRATION PLATES RKA13490 42N-93-11320 42N-93-11310 RKAB4740...

  • 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 picto- grams 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. 42N-93-11220 RKA14740 PRECAUTIONS TO BE TAKEN WHEN HAN-...
  • Page 26 SAFETY, NOISE AND VIBRATION PLATES LOCK THE LOADER CONTROL When it is necessary to travel on roads, lock the loader con- trol 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...
  • 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...
  • 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...

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

    SAFETY, NOISE AND VIBRATION PLATES 2.1.3 POSITION OF THE NOISE PLATES ON MACHINES WITH CAB The noise plates must always be legible and in good conditions; for this reason, if they are dirty with dust, oil or grease, it is necessary to clean them with a solution made of water and detergent. Do not use fuel, petrol or solvents.

  • 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 ma- chine, 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 op- erations. 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: Leaving The Operator's Seat

    GENERAL PRECAUTIONS 2.2.5 LEAVING THE OPERATOR’S SEAT When leaving the operator’s seat, even if for a short time, make sure that the machine is in a safe position. (See "2.4.12 PARKING THE MACHINE"). Before leaving the operator’s seat, carry out the following operations in the sequence indicated below: 1 - Lower the equipment to the ground.

  • 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 there- fore 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 in- haled. If you handle materials containing asbestos fibers, keep to the instructions given below: 1 - Do not use compressed air, but only exhaust fans to clean the machine, and make sure that the room in which you are working is properly ventilated.

  • Page 37: Fire Extinguishers And First Aid Kit

    GENERAL PRECAUTIONS 2.2.12 FIRE EXTINGUISHERS AND FIRST AID KIT Make sure that fire extinguishers have been provided and check their position. Periodically make sure that the fire extinguishers are loaded and that you know how to use them. Find out where the first aid kit has been located. Periodically make sure that the first aid kit contains the nec- essary disinfectants, bandages, medicines, etc.

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

    PRECAUTIONS TO BE TAKEN BEFORE STARTING THE ENGINE 2.3 PRECAUTIONS TO BE TAKEN BEFORE STARTING THE ENGINE 2.3.1 SAFETY ON THE WORK SITE Before starting the engine, thoroughly check the area for any unusual condition of the ground due to which work may be dangerous.

  • 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. RWA01050 2.3.5 CLEANING WINDOWS, MIRRORS AND LIGHTS - CHECKING THE WINDSHIELD WIPER BLADES AND THE BULBS...

  • 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 vi- sion, 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.
  • 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.

  • 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 per- sons 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 ma- chine. 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 extreme- ly dangerous and they may also cause death due to electro- cution; for this reason, when working near overhead electrical lines, always respect the minimum safety distanc- es prescribed by the competent authorities and by the acci- dent-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 pos- sible and it is necessary to park on a slope, position the ma- chine with the front bucket directed downwards and carry out the following operations: 1 - While keeping the machine stopped with the brakes, ap- ply 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 Ramps Loading and unloading the machine on-off a motor vehicle 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 Blocks...

  • 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 in- volved 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 le- ver 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 ma- chine 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

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.6 KEEPING THE MACHINE CLEAN Spilled oil or grease, scattered tools or broken pieces are dangerous, because they may cause someone to slip or trip. Always keep the machine and the worksite clean and tidy. To clean the machine, use a pressurized jet of warm water or steam and the specific detergents available on the market.

  • 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 CAR- RYING 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 in- spection.

  • 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 DUR- ING 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 Concerning The Battery And The Alternator

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.13 PRECAUTIONS CONCERNING THE REMOVAL 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 posi- tive 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 de- fects, since they may burst during use.

  • Page 61: Hydraulic Accumulator

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.18 HYDRAULIC ACCUMULATOR The hydraulic accumulator contains pressurized nitrogen. When carrying out any operation on the accumulator, proceed with the utmost care, in order to avoid explosions and conse- quently serious injury and even death. For this reason, keep to the following instructions: do not remove the accumulator;...

  • Page 62: Precautions Concerning Technopolymers And Elastomers

    PRECAUTIONS TO BE TAKEN DURING MAINTENANCE 2.8.21 PRECAUTIONS CONCERNING TECHNOPOLYMERS AND ELASTOM- 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 INSTAL- LATION OF THE EXHAUST SYS- TEM TAILPIPE When the machine is stopped at the end of work, the ex- haust pipe (1) and the tailpipe (2) are very hot. In these con- ditions, 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...
  • Page 65 THE MACHINE AND ITS OPERATIONS...

  • 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 front loader control (2) (LED on). RKAB2880 Installation of the teeth guard (3). RKA13810...

  • 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.
  • 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 RKAB5630 1 - Front bucket 6 - Rear axle 2 - Bucket dumping cylinder 7 - Fuel tank 3 - Bucket lifting arm 8 - Lifting cylinder 4 - Cab 9 - Front axle 5 - Hydraulic oil tank 10 - Backhoe bucket cylinder.

  • Page 71: Backhoe General View

    GENERAL VIEWS 3.2.2 BACKHOE GENERAL VIEW RIGHT FORWARD LEFT RKAB5730 1 - Bucket 7 - Right access platform and tool box 2 - Arm 8 - Backhoe sliding guides 3 - Boom 9 - Stabilizers 4 - Arm cylinder 10 - Backhoe locking cylinders 5 - Boom cylinder 11 - Boom swing cylinders 6 - Revolving support...

  • Page 72: Cab Inside General View

    GENERAL VIEWS 3.2.3 CAB INSIDE GENERAL VIEW 3.2.3.1 CAB INSIDE GENERAL VIEW (mechanical backhoe controls) 1 - Reversing gear lever 2 - Steering wheel 3 - Front dashboard 4 - Direction selector - dimmer switch 5 - Gearshift lever 6 - Steering wheel adjustment lock 7 - Accelerator pedal 8 - Brake pedals 9 - Side dashboard...

  • Page 73: Cab Inside General View (Backhoe Servo Controls)

    GENERAL VIEWS 3.2.3.2 CAB INSIDE GENERAL VIEW (backhoe servo controls) 1 - Reversing gear lever 2 - Steering wheel 3 - Front dashboard 4 - Direction selector - dimmer switch 5 - Gearshift lever 6 - Steering wheel adjustment lock 7 - Accelerator pedal 8 - Brake pedals 9 - Side dashboard...

  • Page 74: Instruments And Controls

    INSTRUMENTS AND CONTROLS 3.3 INSTRUMENTS AND CONTROLS 3.3.1 FRONT INSTRUMENTS RKA13850 1 - Low fuel warning light 8 - Low oil pressure or braking system failure warning light 2 - Four-wheel drive warning light 9 - General alarm warning light 3 - Differential locking warning light 10 - High beam warning light 4 - Parking brake warning light...
  • Page 75 INSTRUMENTS AND CONTROLS 2 - FOUR-WHEEL DRIVE WARNING LIGHT It comes on when the four-wheel drive is engaged. RKA13870 3 - DIFFERENTIAL LOCKING WARNING LIGHT It comes on when the differential is locked by means of the push button positioned on the loader control lever (see "3.3.6 pos.
  • Page 76 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.
  • Page 77 INSTRUMENTS AND CONTROLS 10 - HIGH BEAM WARNING LIGHT It comes on when the high beam is operated through the dim- mer 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 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 SYS- TEM 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 oper- ated 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 con- trol locking device. This button has the function to inhibit the servo controls and must be used when the machine travels on roads and as safe- ty 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 back- hoe is not going to be used or when the machine travels on roads.
  • 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 23 - HYDRAULIC HAND HAMMER SWITCH (if provided) When pressed (LED on), this switch enables the hydraulic cir- cuit of the hand hammer. When pressed again (LED off), it dis- ables the circuit. RKA13960 24 - IGNITION SWITCH The ignition switch is a rotary key switch with four positions marked with the following symbols «...

  • 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 - Differential locking push button 3 - 4in1 bucket opening push button 4 - 4in1 bucket folding push button 5 - Front loader speed control push button RKAB5231 1 - DECLUTCH PUSH BUTTON This push button is used to transform all the engine power into...

  • Page 87: Push Button On The Gearshift Lever

    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 "3.3.6 pos. 13 - 4 IN1 BUCKET FOLDING 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 3.3.5 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, oper- ates 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.
  • 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 3.3.6 MACHINE CONTROLS 3.3.6.1 MACHINE CONTROLS (version with mechanically-controlled backhoe) RKAB3080 RKAB3090 1 - Reversing gear lever 2 - Brake pedals 3 - Accelerator 4 - Front loader control lever 5 - Gearshift lever 6 - Parking brake 7 - Hand accelerator 8 - Backhoe boom locking button RKAB3100...
  • Page 92 INSTRUMENTS AND CONTROLS 16 - Left stabilizer control lever 17 - Right stabilizer control lever 18 - Left backhoe control lever 19 - Right backhoe control lever RKAB3140 RKAB3130...

  • Page 93: Machine Controls (Version With Servo-Assisted Backhoe)

    INSTRUMENTS AND CONTROLS 3.3.6.2 MACHINE CONTROLS (version with servo-assisted backhoe) RKAB3080 RKAB3090 1 - Reversing gear lever 2 - Brake pedals 3 - Accelerator 4 - Front loader control lever 5 - Gearshift lever 6 - Parking brake 7 - Hand accelerator 8 - Backhoe boom locking button RKAB3100 9 - Backhoe sliding lock switch...
  • Page 94 INSTRUMENTS AND CONTROLS 16 - Left stabilizer control switch 17 - Right stabilizer control switch 18 - Left backhoe control lever 19 - Right backhoe control lever 20 - Pattern change control lever (if provided and only for the version with servo-assisted backhoe) RKAB3140 RKA15080...
  • Page 95 INSTRUMENTS AND CONTROLS 1 - REVERSING GEAR LEVER WARNING When it is necessary to park or leave the machine unattended, even if temporarily, shift the lever to posi- tion (N) and always apply the parking brake. The machine is equipped with an acoustic alarm that is activated if the operator, with the engine run- ning, shifts the reversing gear lever (1) to position F or R with the seat rotated in any position different from the correct driving position.
  • Page 96 INSTRUMENTS AND CONTROLS 2 - BRAKE PEDALS WARNING The brake pedals must always be connected when the or 4 gear is engaged and when the machine travels on roads. Non-compliance with this rule may result in serious ac- cidents. The machine is provided with two split brake pedals that make it possible to turn sharply in small work areas with many obsta- RWA13950 cles;...
  • Page 97 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 98 INSTRUMENTS AND CONTROLS If the lever is shifted following an inclined direction with respect RWA00550 to 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 99 INSTRUMENTS AND CONTROLS 5 - GEARSHIFT LEVER WARNING Since no mechanical connection is provided between the gearbox and the engine, if the machine is parked on a slope it can move freely even with engaged gears; for this reason, always apply the parking brake, in order to avoid any damage.
  • Page 100 INSTRUMENTS AND CONTROLS 6 - PARKING BRAKE CAUTION The parking brake must be applied whenever it is neces- sary 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 101 INSTRUMENTS AND CONTROLS 7 - HAND ACCELERATOR WARNING The use of the hand accelerator is allowed only under the conditions specified below; use in any other condi- tion 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 102 INSTRUMENTS AND CONTROLS 8 - 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 103 INSTRUMENTS AND CONTROLS 9 - BACKHOE SLIDING LOCK SWITCH The switch (9) has the function to release the pressure neces- sary 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 104 INSTRUMENTS AND CONTROLS 11 - DIFFERENTIAL LOCKING PUSH BUTTON IMPORTANT The locking of the differential is possible only with the or 3 gear engaged, both forward and reverse. The locking of the differential in 4 gear is inhibited. Before locking the differential, lower the speed as much as possible, in order to reduce the impact loads on the axle.
  • Page 105 INSTRUMENTS AND CONTROLS 14 - FRONT LOADER SPEED CONTROL PUSH BUTTON The push button (14) makes it possible to exploit the maximum quantity of oil delivered by the hydraulic pump for heavy-duty applications. Press the push button to increase oil delivery; when the push button is released, the oil delivery returns to the standard oper- ating values.
  • Page 106 INSTRUMENTS AND CONTROLS 18/19 - BACKHOE CONTROL LEVERS (version with mechanical controls) 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;...
  • Page 107 INSTRUMENTS AND CONTROLS 18/19 - BACKHOE CONTROL LEVERS (version with servo controls) 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;...
  • Page 108 INSTRUMENTS AND CONTROLS To use the levers correctly, proceed as follows: 1 - With the machine at rest and the engine off, seat correctly and rotate the seat by 180° with respect to the driving po- sition. 2 - Adjust both joysticks until they reach the desired operat- ing position (see "3.3.6.3 pos.
  • 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) RWA00570 N - Neutral A - Bucket folding...
  • Page 111 INSTRUMENTS AND CONTROLS “X” - PATTERN CONTROLS (only for the version with mechanically-controlled backhoe) LEVER 18 (BASIC MANOEUVRES) RWA00640 N - Neutral A - Boom swing to the left B - Boom lowering C - Boom swing to the right D - Boom lifting LEVER 19 (BASIC MANOEUVRES) RWA00650...
  • Page 112 INSTRUMENTS AND CONTROLS 20 - PATTERN CHANGE CONTROL LEVER (if provided and only for the version with servo-as- sisted backhoe) 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 RKAB4490...

  • Page 113: Adjusting The Controls

    INSTRUMENTS AND CONTROLS 3.3.6.3 ADJUSTING THE CONTROLS 1 - Steering wheel adjusting lever 2 - Joystick locking levers (only for the version with servo-assisted backhoe) 3 - Arm support adjusting knob (only for the version with servo-assisted backhoe) 4 - Joystick end-of-stroke adjusting knob (only for the version with servo-assisted backhoe) RKAB3230 RKA15370...
  • Page 114 INSTRUMENTS AND CONTROLS JOYSTICK LOCKING LEVERS (only for the version with servo-assisted backhoe) WARNING Before operating the locking levers to adjust the posi- tion of the joysticks, lower the work equipment to the ground and stop the engine. Adjust the joysticks remaining seated in the driving po- sition.
  • Page 115 INSTRUMENTS AND CONTROLS JOYSTICK STROKE ADJUSTING KNOB (only for the version with servo-assisted backhoe) WARNING The adjustment of the joystick stroke must be carried out before starting work and with the machine complete- ly 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 116: 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 117 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 118: Relays

    FUSES AND RELAYS 3.4.1.2 RELAYS F12 F13 F14 F15 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 RKA14610 POSITION DESCRIPTION Safety unit (against repeated start) Blinking Low beam relay High beam relay Front horn relay Return-to-dig relay...

  • Page 119: 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 func- tions of the single fuses and relays.

  • Page 120: 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 121: Cab

    GUARDS, CAB AND DRIVER’S SEAT 3.5.2 CAB WARNING 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 122 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), fol- lowing the direction indicated by the arrow shown in Fig- ure (A).
  • Page 123 GUARDS, CAB AND DRIVER’S SEAT 3 - Rotate the rear side windows towards the front of the ma- chine, until engaging the coupling (6) in the rubber ele- ment (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 124: 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 opera- tor’s stress both in summer and in winter; these functions also serve to eliminate condensate from the front window, thus ensur- ing visibility during both work and travel.

  • Page 125: Air Conditioner (If Installed)

    GUARDS, CAB AND DRIVER’S SEAT 3.5.4 AIR CONDITIONER (if installed) 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, wash with plenty of water and consult a doctor without delay. Furthermore, to avoid any explosion, do not generate sparks and do not use naked flames near the air conditioner.
  • Page 126 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 in- side 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 127: 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 128: 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 vi- brations and jumps as much as possible; height and cushion inclination;...

  • Page 129: 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, dam- aged 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 130: 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). RKAB4700 RKAB4710...

  • Page 131: Use Of The Machine

    USE OF THE MACHINE 3.6 USE OF THE MACHINE 3.6.1 CHECKS TO BE CARRIED OUT BEFORE STARTING THE ENGINE 3.6.1.1 VISUAL CHECKS WARNING Dirt, oil and fuel in the engine compartment near hot parts may damage the machine and even cause fires.

  • Page 132: 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 133: 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 134: Starting With Cold Engine Or In Cold Climates

    USE OF THE MACHINE 3.6.2.2 STARTING WITH COLD ENGINE OR IN COLD CLIMATES WARNING Do not use any fluids or products that facilitate the cold starting of the engine, since these are ether-based and may cause explosions. Before starting the engine, disconnect all the electric devices (heating, air conditioning, lights, work lights, etc.).

  • Page 135: 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 ac- celerator (see "3.3.6 pos.

  • Page 136: 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 regula- tions 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 137: Differential Locking

    USE OF THE MACHINE 3.6.5.1 DIFFERENTIAL LOCKING WARNING This device can be used only with the 1 or 3 gear engaged, either forward or reverse. The differential must be locked with the machine at rest or at very low speed. The release of the differential takes place automatically when the axles transmit the same load as before, that is, when the two-wheel drive is engaged.
  • Page 138 USE OF THE MACHINE 3.6.5.3 WORKING ON SLOPES WARNING Before starting work on slopes, always check the func- tionality 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 139 USE OF THE MACHINE 3.6.5.4 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 140 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 sufficient- ly wide space, so that checks, daily lubrication and refu- elling can be carried out without problems. Lower the front bucket to the ground and set the back- hoe to the transport position or with the bucket resting on the ground.
  • Page 141 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 be- low. Park on slopes only when it is absolutely necessary. Park only with the front bucket directed downwards.
  • Page 142 STOPPING THE ENGINE 3.8 STOPPING THE ENGINE IMPORTANT The sudden stop of the engine while it is running short- ens its life. Do not stop the engine suddenly, except in case of emergency. It is likewise recommended not to stop the engine sud- denly if it has been running for a long period and is still hot;...
  • Page 143 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 144 TRANSPORTING THE MACHINE ON OTHER VEHICLES 6 - Fix the machine with tie-downs or chains (5) in the an- chorage 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). RKAB3670 RKAB3680 3.9.2 TRANSPORT...
  • Page 145 PRECAUTIONS TO BE TAKEN IN THE COLD SEASON 3.10 PRECAUTIONS TO BE TAKEN IN THE COLD SEASON During the cold season or in areas where temperatures are particularly low, especially during the night, it is neces- sary to take some countermeasures meant to limit any damage deriving from low temperatures. 3.10.1 FUEL AND LUBRICANTS 1 - Change the fuel and use winter fuel type ASTM D975 N.
  • Page 146 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 147 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 flu- For the relevant specifications, see "4.3 FUEL, COOLANT AND LUBRICANTS"”.
  • Page 148 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 ab- solutely necessary, at low speed and with lowered bucket.
  • Page 149 USING THE MACHINE AS A LOADER 3.12.2.1 LOADING HEAPED AND LEVEL MATE- RKA14640 RIAL 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.
  • Page 150 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 151 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 OP- ERATIONS".
  • Page 152 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 153 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 - Release the front loader control and the backhoe control levers. 2 - Lower the stabilizers (1) to avoid overloading the rear wheels and to prevent the machine from oscillating.
  • Page 154 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 155 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 persons, who must decide together the words and sig- nals to be used during operations.
  • Page 156 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 157 LONG PERIODS OF INACTIVITY NOTE This preliminary operations must be carried out when the machine is going to remain unused for approximately 1 month; if the period of inactivity is expected to be longer, see also "3.14.2 PREPARING THE ENGINE FOR A LONG PERIOD OF INACTIVITY".
  • Page 158 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 159 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 160 TROUBLESHOOTING 3.15 TROUBLESHOOTING 3.15.1 HOW TO REMOVE THE MACHINE DANGER The removal of the machine in case of failure always in- volves risks that may cause injuries to the persons re- sponsible for this type of operation. When removing the machine, use a wire rope suitable for the weight of the machine to be removed.
  • Page 161 TROUBLESHOOTING 3.15.3 IF THE BATTERY HAS RUN DOWN WARNING When checking or carrying out any operation on the bat- tery, 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 bat- tery, and avoid producing sparks.
  • Page 162 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 163 TROUBLESHOOTING 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 TROUBLE CAUSE...
  • Page 164 TROUBLESHOOTING 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 165 TROUBLESHOOTING 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 166 THIS PAGE WAS INTENTIONALLY LEFT EMPTY...
  • Page 167 MAINTENANCE...
  • Page 168 GUIDE TO MAINTENANCE 4.1 GUIDE TO MAINTENANCE Before opening the engine hood, engage the safety locks of both the front loader and the backhoe. If it is necessary to check the hydraulic oil level in the tank, set the machine in transport position (see "3.1 SAFE- TY LOCKS").
  • Page 169 GUIDE TO MAINTENANCE Never mix oils of different brands. Do not top up with any oil different from those used in the machine. If necessary, drain the tanks and fill them with the oil of the new brand. WARNING Oils, filters, coolant, gaskets, electric wires and batteries are considered special waste and must be col- lected and disposed of according to the regulations in force.
  • Page 170 MAINTENANCE NOTES 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: FLUID SPECIFICATIONS •...
  • Page 171 MAINTENANCE NOTES Use only red permanent ethylene glycol based antifreeze, with corrosion inhibitors and antifoam products, suita- ble for aluminium radiators. If pure, dilute with water (50%). The use of permanent antifreeze requires only the check of the level and the periodical change of the fluid. It is not necessary to wash the cooling circuit.
  • Page 172 MAINTENANCE NOTES 4.2.3 NOTES REGARDING THE ELECTRIC SYSTEM If the cables are wet or their insulating material is damaged, the electric system leaks and this may result in mal- functions of the machine. The maintenance operations required for the electric system are the following: 1 - check of the alternator belt for damage or breakages;...
  • Page 173 MAINTENANCE NOTES 4.2.5 PARTS SUBJECT TO WEAR THAT PERIODICALLY NEED CHANGING The parts subject to wear such as filters, bucket teeth, etc. must be replaced according to the periodic mainte- nance intervals prescribed or when they reach the wear limit. The timely change of these parts ensures an economic use of the machine.
  • Page 174 FUEL, COOLANT AND LUBRICANTS 4.3 FUEL, COOLANT AND LUBRICANTS AMBIENT TEMPERATURE CAPACITY (l) TANK / FLUID RESERVOIR 50°C 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 Hydraulic system...
  • Page 175 FUEL, COOLANT AND LUBRICANTS 4.3.1 LUBRICATION WITH GREASE LUBRICATION POINTS CONSISTENCY TYPE Joints, transmissions, fork guides, NLGI 2 Lithium EP + MoS door hinges Hydraulically-controlled sliding Mineral oil + graphite + aluminium NLGI 1 plate guides (if installed) complex soap IMPORTANT When the diesel oil sulphur content is less than 0,5%, change the engine oil according to the periodic maintenance intervals indicated in the operation and maintenance manual.
  • Page 176 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 there- fore the use of the oils indicated in the following table is authorized and recommended: . SUPPLIER SYNTHETIC BIODEGRADABLE OIL “HEES”...
  • Page 177 DRIVING TORQUES 4.4 DRIVING TORQUES 4.4.1 STANDARD DRIVING TORQUES FOR SCREWS AND NUTS CAUTION If screws, nuts or other parts are not tightened with the required torque, they may become loose or dam- age the components with which they cooperate, and this may cause machine failures or operation prob- lems.
  • Page 178 DRIVING TORQUES 4.4.2 SPECIFIC DRIVING TORQUES FOR SCREWS AND NUTS a Nm (Newton metre): 1 Nm = 0,102 Kgm ITEM DESCRIPTION Front support screws 20.4 ± 1 200 ± 9.8 Rear support screws 20.4 ± 1 200 ± 9.8 Front 28.5 ±...
  • Page 179 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 LU- BRICANTS"). RKA15780 check change 250h 500h 1000h...
  • Page 180 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 oxida- tion.
  • Page 181 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...
  • Page 182 LUBRICATION 4.5.4 LUBRICATION DIAGRAM (offset device) IMPORTANT For the other greasing points, see "4.5.1 LUBRICATION DIAGRAM". 10 h RKA14130 Grease...
  • Page 183 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6 PERIODICAL CHANGE OF THE SAFETY RELATED COMPO- NENTS 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 indicat- ed in the table in the following page, which are especially related to safety and fire-prevention rules.
  • Page 184 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 Q.ty...
  • Page 185 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1.2 DELIVERY HYDRAULIC SYSTEM Safety related components that periodically Q.ty Change interval need changing Every 2 years or 4000 hours, Hydraulic pipe (Hydraulic pump – distributor) whichever occurs first. RKA14160...
  • Page 186 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1.3 FRONT LOADER HYDRAULIC SYSTEM Safety related components that periodically Q.ty Change interval need changing Hydraulic pipes (Cylinders – loader arm) Every 2 years or 4000 hours, Hydraulic pipes (Cylinders – loader bucket) whichever occurs firs Hydraulic pipes (Cylinders –...
  • Page 187 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1.4 BACKHOE HYDRALIC SYSTEM Safety related components that periodically Q.ty Change interval need changing Hydraulic pipes (Cylinder – backhoe boom) Every 2 years or 4000 hours, Hydraulic pipes (Cylinder – backhoe arm) whichever occurs firs Hydraulic pipes (cylinder –...
  • Page 188 PERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 4.6.1.5 OPERATOR’S SAFETY Safety related components that Q.ty Change interval periodically need changing Safety belt Every 4 years RWA31240...
  • Page 189 MAINTENANCE PLAN 4.7 MAINTENANCE PLAN WHEN REQUIRED CHECKING, CLEANING OR CHANGING THE ENGINE AIR FILTERS................189 CHECKING AND CLEANING THE CAB AIR FILTER ..................... 190 CHECKING AND CLEANING THE AIR RECIRCULATION FILTER (only for machines with air conditioner) ....191 CHECKING THE DETERGENT LEVEL IN THE WINDSHIELD WASHER RESERVOIR ..........
  • Page 190 MAINTENANCE PLAN MAINTENANCE AFTER THE FIRST 250 HOURS OF OPERATION (Operations to be carried out together with those prescribed at point "4.8.8 MAINTE- NANCE EVERY 250 HOURS OF OPERATION") CHANGING THE FRONT AXLE OIL ..........................222 CHANGING THE REAR AXLE OIL ..........................223 CHANGING THE HYDRAULIC TRANSMISSION OIL ....................

  • Page 191: 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 ele- RKAB3690...

  • Page 192: 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 retain- er (1) toward the inside.

  • Page 193: 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 194: 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 deteriorat- ed and therefore it is necessary to change the blades.

  • Page 195: 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 slip- pery; immediately clean any dirty area. The braking system must be bled with the machine posi- tioned on level ground, the loader arm completely lowered, the backhoe boom in transport position and the parking brake applied.

  • Page 196: Checking And Adjusting The Front Wheel Toe-In

    MAINTENANCE PROCEDURES 4.8.1.i CHECKING AND ADJUSTING THE FRONT WHEEL TOE-IN This check must be carried out according to time intervals fixed by the operator, since any anomaly regarding the wheel toe-in is due to impacts or vibrations that depend on the type of surface on which the machine works.

  • Page 197: Checking And Adjusting The Parking Brake

    MAINTENANCE PROCEDURES 4.8.1.k CHECKING AND ADJUSTING THE PARK- ING 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°...

  • Page 198: 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 199: Checking And Adjusting The Stabilizer Slack

    MAINTENANCE PROCEDURES 4.8.1.n CHECKING AND ADJUSTING THE STABI- LIZER SLACK WARNING When leaving the operator’s seat for 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 the slack between the mobile rod (1) and the adjusting ele- RKA14210...

  • Page 200: 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 201: Checks To Be Carried Out Before Starting The Engine

    MAINTENANCE PROCEDURES 4.8.3 CHECKS TO BE CARRIED OUT BEFORE STARTING THE ENGINE 4.8.3.a VARIOUS CHECKS WARNING 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 202: 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 203: 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, lubricate the joints 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 204 MAINTENANCE PROCEDURES POINTS TO BE LUBRICATED ON THE BACKHOE RKA14250 Boom swing cylinder base pin points ) Boom swing fulcrum pin points ) Lifting cylinder head and boom locking lever fulcrum pin points ) Lifting cylinder base and arm pin points ) Telescopic arm extension cylinder base pin point )

  • Page 205: Maintenance After The First 50 Hours Of Operation

    MAINTENANCE PROCEDURES 4.8.5 MAINTENANCE AFTER THE FIRST 50 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 50 hours, together with the maintenance operations to be carried out “EVERY 50 HOURS”.

  • Page 206: Checking The Fluid Level In The Radiator

    MAINTENANCE PROCEDURES 4.8.6.b CHECKING THE FLUID LEVEL IN THE RADIATOR WARNING Carry out this check with the machine parked on level ground and loader arm lifted with engaged safety lock. Do not remove the radiator cap when the fluid is hot, since the fluid may be sprayed out of the radiator and cause burns.

  • Page 207: 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 208: Lubricating The Front Axle Joints And Central Coupling

    MAINTENANCE PROCEDURES 4.8.6.e LUBRICATING THE FRONT AXLE JOINTS AND CENTRAL COUPLING The lubrication points (1) of the wheel joints are indicated in the figure and it is important to remember that they are located in symmetrical positions, while the central coupling is lubricated by means of a grease nipple (2) positioned on the frame.

  • Page 209: 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 car- ried out with full tank, in order to prevent air from entering the fuel circuit.

  • Page 210: Maintenance After The First 250 Hours Of Operation

    MAINTENANCE PROCEDURES 4.8.7 MAINTENANCE AFTER THE FIRST 250 HOURS OF OPERATION The following maintenance operations must be carried out after the first 250 hours, together with the maintenance operations to be carried out “EVERY 250 HOURS”. a - CHANGE THE FRONT AXLE OIL b - CHANGE THE REAR AXLE OIL c - CHANGE THE HYDRAULIC TRANSMISSION OIL d - CHANGE THE HYDRAULIC TRANSMISSION OIL FILTER...

  • Page 211: 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 5-6mm (only for machines with air conditioner) 10 kg WARNING The coolant used in the air conditioning system is very dangerous. If it is sprayed into the eyes or in case of con- tact with the skin, it may cause blindness or frostbite.

  • Page 212: 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 neces- sary add distilled water only before starting work. Always wear safety goggles and waterproof gloves. RKAB4160 To prevent gas explosions, do not use naked flames, do not smoke and avoid producing sparks due to short cir-...

  • Page 213: Checking The Front Axle Oil Levels

    MAINTENANCE PROCEDURES 4.8.8.d CHECKING THE FRONT AXLE OIL LEV- 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 214: Checking The Hydraulic Transmission Oil Level

    MAINTENANCE PROCEDURES 4.8.8.f CHECKING THE HYDRAULIC TRANSMIS- SION OIL LEVEL MAX. WARNING MIN. Check 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 trans- mission oil at operating temperature;...

  • Page 215: Maintenance After The First 500 Hours Of Operation

    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 216: 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 217 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 218 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 219: 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 dis- posed of according to the regulations in force.

  • Page 220: 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 221: 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 222: 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. Always wear an eye shield 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 223: 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. 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 224: Nance Every 250 Hours Of Operation") 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 225: 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 spe- cial waste and must be collected and disposed of accord- ing to the regulations in force.

  • Page 226: Changing The Hydraulic Transmission Oil

    MAINTENANCE PROCEDURES 4.8.11.c CHANGING THE HYDRAULIC TRANSMIS- SION 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 operat- ing temperature, which is very high, and may cause severe burns;...

  • Page 227: Changing The Hydraulic Transmission Oil Filter

    MAINTENANCE PROCEDURES 4.8.11.d CHANGING THE HYDRAULIC TRANSMIS- SION 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 228: Nance Every 500 Hours Of Operation") 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 229 MAINTENANCE PROCEDURES 9 - Change the drain filter (see "4.8.10.c CHANGING THE HY- DRAULIC 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 230: 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 231: 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 slip- pery; immediately clean any dirty area. Oils, filters, the coolant and the battery are considered spe- cial waste and must be collected and disposed of accord- ing to the regulations in force.

  • Page 232: 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 Deal- 4.8.12.e CHANGING THE ALTERNATOR BELT This procedure must be carried out by qualified personnel. Have this operation performed by your Komatsu Deal- 4.8.12.f CHECKING THE A/C COOLING GAS QUANTITY (only for machines with air conditioner) WARNING...

  • Page 233: Maintenance Every 3000 Hours Of Operation

    MAINTENANCE PROCEDURES 4.8.13 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 Deal- 4.8.13.b CHECKING AND ADJUSTING THE ENGINE VALVE CLEARANCE AND THE INJECTION TIMING ADVANCE Since these checks and adjustment operations require the use of special tools, have these operations carried out...

  • Page 234: Maintenance Every 4000 Hours Of Operation

    MAINTENANCE PROCEDURES 4.8.14 MAINTENANCE EVERY 4000 HOURS OF OPERATION Carry out these operations together with those to be performed every 50, 250, 500, 1000 and 2000 HOURS. 4.8.14.a CHANGING THE A/C DEWATERING FILTER (Only for machines with air condi- tioner) WARNING The coolant used in the air conditioning system is very dangerous.
  • Page 235 TECHNICAL SPECIFICATIONS...
  • Page 236 TECHNICAL DATA 5.1 TECHNICAL DATA 5.1.1 STANDARD OVERALL DIMENSIONS 5.1.1.1 OVERALL DIMENSIONS WITH STANDARD ARM 2190 2175 1670 2340 6035 RKA14270 5.1.1.2 OVERALL DIMENSIONS WITH TELESCOPIC ARM 2190 2175 1670 2340 6035 RKA14280...
  • Page 237 TECHNICAL DATA 5.1.2 TECHNICAL CHARACTERISTICS TOTAL WEIGHT Minimum total weight ............kg 7300 Maximum total weight .
  • Page 238 TECHNICAL DATA FRONT TYRES SIZE MAKE INFLATION PRESSURE Recommended 12.5/80-R18 PR10 Good Year bar 3.10 12.5-20 MPT PR10 Good Year bar 2.70 365/70-R18 SPT9 Dunlop bar 3.75 320/80-R18 IT530 (134A8) Good Year bar 3.20 REAR TYRES SIZE MAKE INFLATION PRESSURE Recommended 16.9-28 PR10...
  • Page 239 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 1900 A - Standard arm length L= 1900 mm...
  • Page 240 TECHNICAL DATA 5.1.3.2 LIFTING CAPACITIES (STANDARD ARM) RKA14290 = 7460 Kg > 100 0 Kg W= 600 mm = 160 Kg 24.5 MPa (245 Bar) 1900 -1 m -1 m -1 m...
  • Page 241 TECHNICAL DATA 5.1.3.3 LIFTING CAPACITIES (TELESCOPIC ARM)
  • Page 242 THIS PAGE WAS INTENTIONALLY LEFT EMPTY...
  • Page 243 AUTHORISED OPTIONAL EQUIPMENT...
  • Page 244 AUTHORIZED OPTIONAL EQUIPMENT 6.1 AUTHORIZED OPTIONAL EQUIPMENT CAUTION Komatsu machines can be provided with optional equipment in addition to the standard equipment; if optional equipment is installed and used, carefully read the relevant operation manual and keep to the instructions given therein. Use only optional or special equipment recommended and approved by Komatsu and in compliance with the requirements indicated in the table.
  • Page 245 AUTHORIZED OPTIONAL EQUIPMENT 6.1.2 PRECAUTIONS REGARDING THE INSTALLATION OF EQUIPMENT WARNING The installation of long work equipment reduces the stability of the machine. If it is necessary to travel up or down a slope, proceed very carefully, since the machine may lose its bal- ance and overturn.
  • Page 246 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. ISO MAX. OPERATING MAX. FLOW WEIGHT CAPACITY PRESSURE RATE EQUIPMENT Width Height (l/min. (kg) (bar) (mm) (mm) Front bucket 2320 —...
  • Page 247 FRONT EQUIPMENT QUICK COUPLING DEVICES 6.2 FRONT EQUIPMENT QUICK COUPLING DEVICES WARNING The coupling and uncoupling operations must be per- formed on a firm and level surface. The method described is valid for all the front equip- ment whose operation does not require the use of pres- surized oil.
  • Page 248 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 COU- PLING”), except for the backward movement and the engage- ment of the coupling pins, which are obtained by means of the push buttons (9) and (10) located on the lever (3).
  • Page 249 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 elim- inates 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 250 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 use during work.
  • Page 251 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 252 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-com- pliance with these rules may cause serious damage and even death.
  • Page 253 PALLET FORKS 6.4.2 SAFETY DEVICES Two safety pins (3) are provided to keep the forks in over- turned position when the machine travels on roads. RWA34540 6.4.3 USING THE FORKS WARNING Before working with the forks, the operator must evalu- ate the increased dimensions of the machine and learn how to use the fork controls.
  • Page 254 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 255 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 256 BACKHOE TELESCOPIC ARM 6.5 BACKHOE TELESCOPIC ARM 6.5.1 DESCRIPTION AND CONTROL The telescopic arm makes it possible to work with the equip- ment 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 257 BACKHOE TELESCOPIC ARM 6.5.2 SAFETY DEVICES RWAB0470 The telescopic arm is equipped with a safety element (6) 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 258 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 259 BACKHOE TELESCOPIC ARM CAUTION If the adjusting dowels (9) protrude to the same extent on the two sides, the operation described at point 6 can 10 9 be carried out either on the right or on the left side. 270° 6 - Loosen the four lock nuts (10) and tighten the adjusting dowels (9) thoroughly, until taking up the slack completely.
  • Page 260 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 6.6 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLI- TION 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 261 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 262 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. RKA14440 5 - Always make sure that the arm thrust is optimal, in order to avoid harmful and useless strokes.
  • Page 263 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. RKA15540 3 - Moving the tool while it is hitting the material to be broken. RWA06480...
  • Page 264 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. RKA15550 7 - Lifting the machine by levering on the hammer bit with the bucket cylinder completely extended.
  • Page 265 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 hor- RKA14490 izontally, with the bit directed towards the machine.
  • Page 266 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 3 - Remove the plugs of the machine pipes and of the ham- TELESCOPIC mer flexible pipes. Use 32, 36, 38 and 41 mm hex wrenches. 4 - 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 267 CONFIGURATION FOR THE INSTALLATION OF THE DEMOLITION HAMMER 6.6.3.2 REMOVING THE HAMMER To remove the hammer, proceed as follows: 1 - Stop the engine and move the hydraulic controls in all directions, in order to completely release the residual pressure present in the circuits of the machine. 2 - Press the hammer control pedal to release the pressure present in the hammer delivery pipe.
  • Page 268 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 cen- trally 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 269 APPLICATION OF THE OFFSET DEVICE 6.7.1.2 CONTROL (version with servo-assisted backhoe) In the version with servo controls, the movement of the equip- ment with offset boom is achieved via the buttons (7) and (8) positioned on the left joystick lever. The movements of the levers described in "3.3.6.1 pos.
  • Page 270 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 271 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 indi- cated in paragraph "3.13.4.1 CHANGING THE BACKHOE BUCKET". Connect the delivery and return pipes by proceed- ing as follows: 1 - After connecting the equipment, stop the engine and shift the hydraulic controls in all directions, in order to release...
  • Page 272 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 273 CONFIGURATION FOR THE USE OF THE CLAMSHELL BUCKET 6.9.1.2 CONTROL (version with servo-assisted backhoe) In the version with servo controls, the rotary movements of the clamshell bucket are achieved via the buttons (2) and (3) posi- tioned on the left joystick lever. The movements of the main equipment (boom, arm and boom swing) remain unchanged.
  • Page 274 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 275 CONFIGURATION FOR THE USE OF THE CLAMSHELL BUCKET CAUTION During the following steps, take care to prevent any im- purities from getting into the pipes and the cylinder. If any oil has been spilled, wipe it up immediately, in or- der to prevent the surface from getting slippery.
  • Page 276 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 277 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 278 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 - Move the hydraulic controls more than once in all direc- tions, in order to release any residual pressure from the circuits of the machine.
  • Page 279 LOAD STABILIZER SYSTEM (LSS) (Optional) 6.11 LOAD STABILIZER SYSTEM (LSS) (Optional) CAUTION Never operate the load stabilizer system while using the backhoe. The load stabilizer system (LSS) improves the performance of the machine during travel, regardless of the type of terrain and of the bucket load.
  • Page 280 REAR EQUIPMENT MECHANICAL QUICK COUPLING DEVICE 6.12 REAR EQUIPMENT MECHANI- CAL QUICK COUPLING DEVICE WARNING The work equipment coupling and uncoupling operatio must be carried out on a firm and level surface. The method described is valid for any rear equipme whose operation does not require the use of pressuriz oil.
  • Page 281 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 sig- nals to be used during work.
  • Page 282 REAR EQUIPMENT MECHANICAL QUICK COUPLING DEVICE Release procedure: 1 - Remove the safety pin (5) after removing the relevant re- tainer (6). 2 - Slightly lift the bucket from the ground and insert the re- lease lever (9) in the apposite hole in the quick coupling (1).
  • Page 284 © 2005 KOMATSU UTILITY EUROPE S.p.A. All Rights Reserved Printed in Europe...

This manual is also suitable for:

F50003

Table of Contents