Komatsu PC400LC-8 Manual

CEAM009903

Operation&Maintenance

Manual

PC400LC-

HYDRAULIC EXCAVATOR

SERIAL NUMBERS PC400LC-8 A88001 and up

ENGINE 6D125E-5

This material is proprietary to Komatsu America Corp. and is not to be reproduced, used, or disclosed except in

accordance with written authorization from Komatsu America Corp.

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

changes or 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.

March 2016

Printed in U.S.A.

Komatsu America Corp.

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0-1

0INTRODUCTION

PC400LC-8

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FOREWORD

0-2 PC400LC-8

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 a hazard when performing operation and maintenance.

Storage location for the Operation and Maintenance Manual: . . .

. . . . . . . . . . magazine box on the left side of the operator's seat.

Before beginning operation or maintenance, operators and maintenance personnel must always observe

the following points.

●Read this manual thoroughly and understand its contents fully.

●Read the safety messages and safety labels given in this manual carefully so that they should be

understood fully.

Keep this manual at the storage location for the Operation and Maintenance Manual given below so that all

personnel involved in working on the machine can consult it periodically.

In case this manual should be lost or damaged, immediately contact Komatsu or your Komatsu distributor

to obtain a new copy.

When you sell the machine, make sure that this manual should be provided to the new owner together with

the machine.

In this manual, measurements are expressed in international standard units (SI). For reference purposes,

weight units used in the past are also displayed in (_).

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SAFETY INFORMATION

PC400LC-8 0-3

SAFETY INFORMATION

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

avoid accidents, read, understand and follow all precautions and warnings in this manual and on the machine before

performing maintenance and machine operations.

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

injury or damage. In this manual and on machine labels, different signal words are used to express the potential level of

hazard.

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

serious injury. This signal word is to be limited to most extreme situations.

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

serious injury.

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

moderate injury. It may also be used to alert against unsafe practices.

Remark

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

machine.

Safety precautions are described in SAFETY section 1.

KOMATSU AMERICA CORP. cannot predict every circumstance that might involve a potential hazard in operation and

maintenance. Therefore the safety message 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, you must be sure that you and

others can do such procedures and actions safely and without damaging the machine. If you are unsure about the safety of

some procedures, contact your local distributor or KOMATSU AMERICA CORP.

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SAFETY INFORMATION

0-4 PC400LC-8

•Safety labels

Safety labels are affixed 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 of safety label using words

Safety labels using pictogram

Safety pictograms use a picture to express a level 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 a triangle and the method of avoiding the hazardous

condition is shown inside a circle.

Komatsu cannot predict every circumstance that might involve a potential 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.

You should nener engage in prohibited uses or actions described in this manual.

The explanations, 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.

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INTRODUCTION

PC400LC-8 0-5

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 “Recommended Applications” on page 2-169 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 seat when the

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

(A) Front (C) Left (E) Operator’s Seat

(B) Rear (D) Right (F) Sprocket

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INTRODUCTION

0-6 PC400LC-8

Visibility From Operator's Seat

The visibility standards (ISO 5006) for this machine require a view shown in the diagram below.

Proximity Visibility

The visibility of this machine in the area 1 m from the outside surface of the machine at a height of 1.5 m is shown in the

diagram below. The hatched area (A) shows the area where the view is blocked by part of the machine when mirrors or other

aids to visibility are installed as standard. Please be fully aware that there are places that cannot be seen when operating the

machine.

(If equipped rear view camera)

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