Komatsu Excavator Manual (EN)

TEN00501-00 Operation & Maintenance Manual PC308USLC - 3E0 HYDRAULIC EXCAVATOR SERIAL NUMBERS PC308USLC-3E0 30258 and up ENGINE SAA6D107E-1 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. August 2011 Copyright 2011 Komatsu Printed in U.S.A. Komatsu America Corp.

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. FOREWORD BEFORE READING THIS MANUAL BEFORE READING THIS MANUAL This manual gives details of the operation and methods of inspection and maintenance for this machine that must be obeyed in order to use the machine safely. Most accidents are caused by the failure to follow fundamental safety rules for the operation and maintenance of machines. Read, understand and follow all precautions and warnings in this manual and on the machine before performing operation and maintenance. Failure to do so may result in serious injury or death. Komatsu cannot predict every circumstance that might involve a potential hazard when the machine is used.

Therefore, the safety messages in this manual and on the machine may not include all possible safety precautions. If you carry out any operation, inspection, or maintenance under conditions that are not described in this manual, understand that it is your responsibility to take the necessary precautions to ensure safety. In no event should you or others engage in the prohibited uses or actions described in this manual. Improper operation and maintenance of the machine can be hazardous and could result in serious injury or death. If you sell the machine, be sure to give this manual to the new owner together with the machine.

Always keep this Operation and Maintenance Manual in the location shown on the right so that all relevant personnel can read it at any time. Storage location for the Operation and Maintenance Manual: magazine box on the left side of the operator's seat. If this manual is lost or damaged, contact your distributor immediately to arrange for its replacement. For details regarding the machine serial No. you will need to provide your Komatsu distributor, see "YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR (PAGE 1-6)". This manual uses the international units (SI) for units of measurement. For reference, units that have been used in the past are given in ( ).

The explanations, values, and illustrations in this manual have been prepared based on the latest information available as of the date of its publication. Continuing improvements in the design of this machine may lead to additional changes that are not reflected in this manual. Consult Komatsu or your Komatsu distributor for the latest available information concerning your machine or with questions regarding information contained in this manual. The numbers in circles in the illustrations correspond to the numbers in ( ) in the text. (For example: 1 (1)) Komatsu delivers machines that comply with all applicable regulations and standards of the country to which it has been shipped.

If this machine has been purchased in another country, it may lack certain safety devices and specifications that are necessary for use in your country. If there is any question about whether your product complies with the applicable standards and regulations of your country, consult Komatsu or your Komatsu distributor before operating the machine. 1 - 2

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. FOREWORD SAFETY INFORMATION SAFETY INFORMATION followed. This hazardous situation which, if not avoided, will This signal word indicates a potentially hazardous situation which, if not avoided, could This signal word indicates a potentially hazardous situation exists which, if not avoided, The following are used to alert you to information that must be followed to avoid damage to the machine. 1 - 3 To enable you to use the machine safel y, and to prev ent injury to operators , service personnel or bystanders, the warnings the machi always To i dentify important safety messages in the manual an d on the m achine labels, the following sig nal words are used.

The Alert Symbol" messages on machines, in manuals, and elsewhere. When you see this symbol, be al ert to the risk of personal inj ury or deat h. Follow t he instructions in th e safety message. imminently ult in death o r serious injury ult in death o r serious injury y result in mi nor or moderat signal word s precaution i s given where the machi ne may be damaged or the ser vice life reduce d if precaution is not followed. s word is use d for informati on that is u seful t o know.

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. FOREWORD INTRODUCTION INTRODUCTION DIRECTIONS OF MACHINE (A) (B) (C) (D) Front Rear Left Right (E) (F) Operator's seat Sprocket 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. VISIBILITY FROM OPERATOR'S SEAT This machine complies with the visibility standard (ISO 5006). This machine maintains a close visibility of a height of 1.5 m at a point 1 m away from the outside surface of the machine, and a visibility for a circumference of 12 m.

1 - 4 USE OF MACHINE This Komatsu machine is designed to be used mainly fo r the following work: Digging work Leveling work Ditching work Loading work Demolition work See the section "RECOMMENDED for further details.

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