Komatsu D155A-6 User Manual

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MAINTENANCE
GUIDES TO MAINTENANCE
DUSTY WORKSITES:
When working at dusty worksites, do as follows:
Inspect the dust indicator frequently to see if the air cleaner is dirty or clogged.
Clean the radiator core frequently to avoid clogging.
Clean and replace the fuel filter frequently.
Clean electrical components, especially the starting motor and alternator, to avoid accumulation of dust.
When inspecting or changing the oil, move the machine to a place that is free of dust to prevent dirt from getting
into the oil.
AVOID MIXING OILS:
If a different brand or grade of oil has to be added, drain the old oil and replace all the oil with the new brand or grade
of oil. Never mix different brand or grade of oil.
LOCKING INSPECTION COVERS:
Lock inspection cover securely into position with the lock bar. If inspection or maintenance is performed with
inspection cover not locked in position, there is a danger that it may be suddenly blow shut by the wind and cause
injury to the worker.
BLEEDING AIR:
When hydraulic equipment has been repaired or replaced, or the hydraulic piping has been removed and installed
again, the air must be bled from the circuit. For details, see "BLEEDING AIR IN HYDRAULIC SYSTEM (PAGE
4-49)".
PRECAUTIONS WHEN INSTALLING HYDRAULIC HOSES:
When removing parts at locations where there are O-rings or gasket seals, clean the mounting surface, and
replace with new parts.
When doing this, be careful not to forget to assemble the O-rings and gaskets.
When installing the hoses, do not twist them or bend them sharply. If they are installed so, their service life will
be shortened extremely and they may be damaged.
CHECKS AFTER INSPECTION AND MAINTENANCE:
If you forget to perform the checks after inspection and maintenance, unexpected problems may occur, and this may
lead to serious injury or property damage. Always do the following:
Checks after operation (with engine stopped)
Have any inspection and maintenance points been forgotten?
Have all inspection and maintenance items been performed correctly?
Have any tools or parts been dropped inside the machine? It is particularly dangerous if parts are dropped
inside the machine and get caught in the lever linkage mechanism.
Are there any leakage of coolant or oil? Have all nuts and bolts been tightened?
Checks when engine is running
For the checks when the engine is running, see "TWO WORKERS FOR MAINTENANCE WHEN ENGINE IS
RUNNING (PAGE 2-31)" in the SAFETY section, and take care of safety sufficiently.
Check that the inspected and maintained parts work normally.
Raise the engine speed and check for fuel leakage and oil leakage.
4 - 3

Komatsu D155A-6 Specifications

General

Brand	Komatsu
Model	D155A-6
Category	Construction Equipment
Language	English

Summary

FOREWORD

BEFORE READING THIS MANUAL

Essential safety and operational guidance before using the machine.

SAFETY INFORMATION

GENERAL PRECAUTIONS COMMON TO OPERATION AND MAINTENANCE

Fundamental safety rules for operating and maintaining the machine.

INTRODUCTION

USE OF MACHINE

Describes the primary work applications of the bulldozer.

NECESSARY INFORMATION

PRODUCT IDENTIFICATION NUMBER (PIN), MACHINE SERIAL NO. PLATE

Details on locating machine identification plates for service.

SAFETY

PRECAUTIONS WHEN GETTING ON OR OFF MACHINE

Critical safety steps for safe entry and exit from the operator's compartment.

PRECAUTIONS FOR OPERATION

PRECAUTIONS FOR JOBSITE

Safety measures and checks required for the operating work environment.

OPERATION

CHECKS BEFORE OPERATION

Daily pre-operation checks to ensure machine safety and performance.

TRANSPORTATION

LOADING, UNLOADING WORK

Procedures for safely loading and unloading the machine onto transport.

PRECAUTIONS FOR MAINTENANCE

STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE

Critical safety step to stop the engine before any inspection or maintenance.

EXPLANATION OF COMPONENTS

MACHINE MONITOR

Explanation of the machine's main operator display and its functions.

CONTROL LEVERS, PEDALS

JOYSTICK (STEERING, DIRECTIONAL AND GEAR SHIFT LEVER)

Details on operating the primary control lever for movement and steering.

MOVING MACHINE

MOVING MACHINE

Step-by-step instructions for safely moving the bulldozer.

MAINTENANCE

GUIDES TO MAINTENANCE

General principles and precautions for performing machine maintenance.

MAINTENANCE SCHEDULE CHART

INITIAL 250 HOURS SERVICE (ONLY AFTER THE FIRST 250 HOURS)

Specific maintenance tasks required after the initial 250 operating hours.

CHECK, CLEAN AND REPLACE AIR CLEANER ELEMENT

CLEANING OUTER ELEMENT

Procedures for cleaning the outer air cleaner element for optimal engine performance.

CHECK AND ADJUST TRACK TENSION

ADJUSTMENT

Steps for adjusting track tension to maintain proper undercarriage performance.

RECOMMENDED FUEL, COOLANT, AND LUBRICANT

RECOMMENDED FUEL, COOLANT, AND LUBRICANT

Specifications for fluids to ensure reliability and durability of machine components.

STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS

TORQUE LIST

Specified torque values for tightening various bolts and nuts to ensure structural integrity.

PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS

SAFETY CRITICAL PARTS

Identification of parts requiring periodic replacement for safe machine operation.

SPECIFICATIONS

SPECIFICATIONS

Key technical data and dimensions of the D155A-6 bulldozer.

ATTACHMENTS, OPTIONS

INTRODUCTION OF ATTACHMENTS AND OPTIONS

Overview of available attachments and optional equipment for the machine.

PROCEDURE FOR SELECTING RIPPER POINT

PROCEDURE FOR SELECTING RIPPER POINT

Guide to selecting the appropriate ripper point based on soil type and conditions.

HANDLING MACHINES EQUIPPED WITH KOMTRAX

BASIC PRECAUTIONS

Safety precautions related to the Komtrax machine management system.