Komatsu PC78US-6 and PC78UU-6 SERVICE MANUAL
The PC78US offers high productivity and efficiency in a compact design. Due to the tight tail design of the PC78US-6, operators can focus on the work in front of them and worry less about rear swing impacts. The rigid boom offers unmatched power and makes tough jobs easy. Powerful Engine With Turbocharger
The engine is EPA Tier 2 emissions certified.
Komatsu PC78US-6 and PC78UU-6 Repair Manual
New pressure-compensated Closed-center Load Sensing System (CLSS)0 hydraulic system HydrauMind
Even when 2 or more actuators are operated simultaneously, the PC78US-6’s pressure- compensated CLSS
system ensures that each actuator works according to its control input without affecting the size of the load. This gives the operator precise control at all times.
Engine speed sensing=Optimum Power Power utilized by the main pump is adjusted automatically in accordance with the engine speed. That means this computerized system keeps engine speed even under high load conditions.
The cab offers comfort and space to help the operator become even more confident and productive. The ergonomically designed features help reduce fatigue and increase focus on the job at hand. The noise levels of the engine already exceed regulated standards, which helps reduce fatigue and can make the operator even more comfortable.
The PC78US design uses a Tight Tail concept for both ends. This makes rotating the machine fast, easy, and confident. There is less to worry about in tight space conditions because there is little protrusion from either the tail end of the front end.
Komatsu PC78US-6 and PC78UU-6 SERVICE MANUAL
Table of Content of the Komatsu Excavator PC78UU-6, PC78US-6 Manual:
01 GENERAL 01-1
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD 10-1
20 TESTING AND ADJUSTING 20-1
30 DISASSEMBLY AND ASSEMBLY 30-1
50 OTHER SPECIFICATIONS (PC78US-6 For Norway) 50-1
90 OTHERS 90-1
Komatsu PC78US-6 and PC78UU-6 SERVICE MANUAL
This operation and maintenance manual provides essential information with regard to the operation and maintenance of this machine. Careful handling, correct periodical inspections, and maintenance. This manual should always be present with a machine.
Komatsu pc78us-6 service manual
The Komatsu PC78US-6 service manual is a comprehensive guide that provides detailed information and instructions on how to service and maintain the Komatsu PC78US-6 excavator. This manual is essential for technicians and operators who want to ensure optimal performance and longevity of the machine. It covers a wide range of topics, including troubleshooting, maintenance procedures, hydraulic and electrical systems, engine specifications, and much more.
- Troubleshooting: Learn how to identify and resolve common issues with the Komatsu PC78US-6 excavator.
- Maintenance Procedures: Follow step-by-step instructions for routine maintenance tasks, such as oil changes, filter replacements, and lubrication.
- Hydraulic System: Understand the operation and maintenance of the excavator’s hydraulic system, including the control valves, cylinders, and hoses.
- Electrical System: Gain insights into the electrical components and wiring of the PC78US-6 excavator, including troubleshooting and repair.
- Engine Specifications: Access detailed information about the engine, including torque specifications, fuel system components, and cooling system maintenance.
- Undercarriage: Learn how to inspect, adjust, and replace undercarriage components, such as tracks, rollers, and sprockets.
- Operating Tips: Discover valuable tips and techniques for operating the Komatsu PC78US-6 excavator efficiently and safely.
Komatsu PC78US-6 and PC78UU-6 shop manual.c
Komatsu PC78US-6 operation and maintenance manual
Komatsu PC78US-6 and PC78UU-6 shop manual.
This is a factory shop manual 785 pages.
MACHINE MODEL SERIAL NUMBER
PC78US-6 4001 and up
PC78US-6 4809 and up (For Norway)
PC78UU-6 22832 and up
This factory service manual has easy-to-read text sections with top quality diagrams, pictures, and illustrations. The step by step instructions shows you how to fault find or complete any repair or overhaul, correctly and efficiently, saving time and avoiding cockups.
All specifications
and tolerances are listed. The functions of components and systems are also explained.
