Komatsu PC450LC-8 Manuale

CEAM021902

Operation&Maintenance

Manual

-8

HYDRAULIC EXCAVATOR

SERIAL NUMBERS PC450LC-8 A10001 and up

ENGINE 6D125E-5

This material is proprietary to Komatsu America International Company and is not to be reproduced, used, or

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

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.

Printed in U.S.A

March 2016 Komatsu America Corp.

California

Proposition 65 Warning

This machine may contain mercury in two areas:

a.) The display monitor contains mercury if it has a mercury

label attached.

b.) Optional HID bulbs contain mercury (if the machine is so

equipped).

There is no risk of exposure unless the bulbs are broken.

However, the monitor and/or lamps must be reused, recycled

or properly disposed of in accordance with Local, State and

Federal Laws at the end of their useful lives.

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0-1

0INTRODUCTION

PC450LC-8

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FOREWORD

0-2 PC450LC-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 the reference

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

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SAFETY INFORMATION

PC450LC-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 PC450LC-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.

In no event should you 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

PC450LC-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 2-168. 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 PC450LC-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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INTRODUCTION

PC450LC-8 0-7

12 m Circumference Visibility

The visibility at a radius of 12 m from the machine is as shown in the diagram below. The hatched areas (B) show the areas

where the view is blocked 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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INTRODUCTION

0-8 PC450LC-8

Breaking-in The New Machine

Remark

Your Komatsu machine has been thoroughly adjusted and tested before shipment from the factory. However,

operating the machine under full load before breaking the machine in can adversely affect the performance

and shorten the machine life.

Be sure to break in the machine for the initial 100 hours (as indicated on the service meter).

Make sure that you fully understand the content of this manual, and pay careful attention to the following points when

breaking in the machine.

•Run the engine at idle for 15 seconds after starting it. During this time, do not operate the control levers or fuel control

dial.

•Idle the engine for 5 minutes after starting it up.

•Avoid operation with heavy loads or at high speeds.

•Immediately after starting the engine, avoid sudden starts, sudden acceleration, unnecessary sudden stops, and sudden

changes in direction.

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