Komatsu PC400LC-8 Handbuch
CEAM009903
Operation&Maintenance
Manual
PC400LC-
8
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
Copyright 2016 Komatsu
Printed in U.S.A.
Komatsu America Corp.
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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1
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