KOMATSU PC138US-8, PC138USLC-8 EXCAVATOR SERVICE SHOP, PARTS, OPERATION MANUAL

KOMATSU PC138US-8, PC138USLC-8 EXCAVATOR SERVICE SHOP, PARTS, OPERATION MANUAL
LANGUAGE: ENGLISH
FORMAT: PDF
PAGES: 3,472
FILE SIZE: 120MB

MODEL AND ENGINE COVERED:

KOMATSU PC138US-8, PC138USLC-8 EXCAVATOR

SERIAL NO:

PC138US- 20001 AND UP

PC138USLC- 20001 AND UP

ENGINE:

SAA4D95LE-5 DIESEL ENGINE

PART NO:

SEN01968-02

SEN01968-15

CONTENTS:

INDEX AND FOREWORD

SPECIFICATION

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD

STANDARD VALUE TABLE

TROUBLESHOOTING

DISASSEMBLY AND ASSEMBLY

DIAGRAMS AND DRAWINGS

EXTRAS INCLUDED:

OPERATION & MAINTENANCE MANUAL

PC138US-8 - PARTS MANUAL

WIRING DIAGRAMS

The KOMATSU PC138US-8 and PC138USLC-8 Excavator Service Shop Manual is a comprehensive technical guide designed for professional mechanics, equipment owners, fleet managers, and construction machinery technicians. This manual provides detailed service, repair, maintenance, troubleshooting, overhaul, inspection, and diagnostic procedures for the Komatsu PC138US-8 and PC138USLC-8 hydraulic excavators. It includes complete coverage of the engine, hydraulic system, electrical system, powertrain, undercarriage, swing mechanism, travel motors, control valves, and attachment components. Detailed wiring diagrams, hydraulic circuit diagrams, specifications, torque values, disassembly and assembly instructions, testing procedures, and preventive maintenance schedules help ensure accurate repairs and maximum machine performance. Whether performing routine servicing, major component rebuilding, or advanced fault diagnosis, this workshop manual provides factory-level information to reduce downtime, improve reliability, and extend the operational life of your Komatsu excavator. Komatsu is a globally recognized manufacturer of construction and mining equipment, known for producing durable and high-performance excavators used in demanding job site environments.