Komatsu PC78US-6 Handbuch

SEAM044601T

Operation&Maintenance

Operation&MaintenanceOperation&Maintenance

Operation&Maintenance

Manual

ManualManual

Manual

PC78US

-6

HYDRAULIC EXCAVATOR

SERIAL NUMBERS PC78US - 4562 and up

This material is proprietary to Komatsu Utility Division and is not to be reproduced, used, or disclosed

except in accordance with written authorization from Komatsu America International Company.

It is out policy to improve our products whenever it is possible and practical to do so. We reserve the right to

make changes or improvements at any time without incurring any obligation to install such changes on

products sold previously.

Due to this continuous program of research and development, revisions may be made to this publication. It

is recommended that customers contact their distributor for information on the latest revision.

DataKom Publishing Corporation

December 2001

1 - 1

FOREWORD

This manual provides rules and guidelines which will help you use this machine safely and effectively. The

precautions in this manual must be followed at all times when performing operation and maintenance. Most

accidents are caused by the failure to follow fundamental safety rules for the operation and maintenance of

machines. Accidents can be prevented by knowing beforehand conditions that may cause hazard when performing

operation and maintenance.

Operators

and

maintenance

personnel

must

always

follows

before

beginning

operation

maintenance.

Always

sure

read

and

understand

this

manual

thoroughly

before

performing

operation

and

maintenance.

Read

the

safety

messages

given

this

manual

and

the

safety

labels

affixed

the

machine

thoroughly

and

sure

that

you

understand

them

fully.

Keep

this

manual

the

storage

location

for

the

Operation

and

aintenance

anual

given

below,

and

have

all

personnel

read

periodically.

this

manual

has

been

lost

has

become

dirty

and

cannot

read,

request

replacement

manual

immediately

from

Komatsu

your

Komatsu

distributor.

you

sell

the

machine,

sure

give

this

manual

the

new

owners

together

with

the

machine.

Komatsu

delivers

machines

that

comply

with

all

applicable

regulations

and

standards

the

country

which

has

been

shipped.

this

machine

has

been

purchased

another

country

purchased

from

someone

another

country,

may

lack

certain

safety

devices

and

specifications

that

are

necessary

for

use

your

country.

there

any

question

about

whether

your

product

complies

with

the

applicable

standards

and

regulations

your

country,

consult

Komatsu

your

Komatsu

distributor

before

operating

the

machine.

Storage location for the Operation and Maintenance Manual:

Amagazine bo provided on the left side of operator's seat

1 - 2

FOREWORD

1 - 3

FOREWORD

1 - 4

FOREWORD

SAFETY INFOR ATION

SAFETY INFORMATION

To enable you to use this machine safely, safety precautions and labels are given in this manual and affi ed to the

machine to give e planations of situations involving potential hazards and of the methods of avoiding such

situations.

Signal

words

The following signal words are used to inform you that there is apotential hazardous situation that may lead to

personal injury or damage.

In this manual and on machine labels, the following signal words are used to e press the potential level of hazard.

Indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury.

Indicates apotentially hazardous situation which, if not avoided, could result in death or

serious injury.

Indicates apotentially hazardous situation which, if not avoided, may result in minor or

moderate injury. This word is used also to alert against unsafe practices that may cause

property damage.

Example

safety

message

using

signal

word

When

standing

from

the

operator's

seat,

always

place

the

safety

lock

lever

the

LOCK

position.

you

accidentally

touch

the

control

levers

when

they

are

not

locked,

this

may

cause

serious

injury

death.

Other

signal

words

In addition to the above, the following signal words are used to indicate precautions that should be followed to

protect the machine or to give information that is useful to know.

This word is used for precautions that must be taken to avoid actions which could shorten

the life of the machine.

This word is used for information that is useful to know.

1 - 5

FOREWORD

SAFETY INFOR ATION

Safety

labels

Safety labels are affi ed to the machine to inform the operator or maintenance worker on the spot when carrying out

operation or maintenance of the machine that may involve hazard.

This machine uses "Safety labels using words" and "Safety labels using pictograms" to indicate safety procedures.

Example

safety

label

using

words

Safety

labels

using

pictogram

Safety pictograms use apicture to e press alevel of hazardous

condition equivalent to the signal word. These safety pictograms

use pictures in order to let the operator or maintenance worker

understand the level and type of hazardous condition at all times.

Safety pictograms show the type of hazardous condition at the top

or left side, and the method of avoiding the hazardous condition at

the bottom or right side. In addition, the type of hazardous

condition is displayed inside atriangle and the method of avoiding

the hazardous condition is shown inside acircle.

Komatsu cannot predict every circumstance that might involve apotential hazard in operation and maintenance.

Therefore, the safety messages in this manual and on the machine may not include all possible safety precautions.

If any procedures or actions not specifically recommended or allowed in this manual are used, it is your responsibility

to take the necessary steps to ensure safety.

In no event should you engage in prohibited uses or actions described in this manual.

The e planations, values, and illustrations in this manual were prepared based on the latest information available

at that time. Continuing improvements in the design of this machine can lead to changes in detail which may not

be reflected in this manual. Consult Komatsu or your Komatsu distributor for the latest available information of your

machine or for questions regarding information in this manual.

The numbers in circles in the illustrations correspond to the numbers in ( )in the te t. (For e ample: j -> (1))

1 - 6

FOREWORD

INTRODUCTION

This Komatsu machine is designed to be used mainly for the following work:

Digging work

Leveling work

Ditching work

Loading work

Demolition work

See the section "RECOMMENDED APPLICATIONS (PAGE 3-98)" for further details.

DIRECTIONS OF MACHINE

In this manual, the terms front, rear, left, and right refer to the travel direction as seen from the operator's cab when

the operator's cab is facing the front and the sprocket is at the rear of the machine.

1 - 7

FOREWORD

PRODUCT INFOR ATION

PRODUCT INFORMATION

When requesting service or ordering replacement parts, please inform your Komatsu distributor of the following

items.

MACHINE SERIAL NUMBER PLATE AND ITS LOCATION

On the bottom right of the operator's cab

ENGINE SERIAL NUMBER PLATE AND ITS LOCATION

On the upper side of the engine cylinder head cover

EPA: Environmental Protection Agency, U.S.A.

1 - 8

FOREWORD

PRODUCT INFOR ATION

SERVICE METER LOCATION

On top of the machine monitor

YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR

Machine serial No.

Engine serial No.

Distributor name

Address

Service Personnel

Phone/Fax

1 - 9

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