Komatsu PC78UU-6, PC78US-6, PC78US-6 Mini Excavator Service Manual
1,026 pages · Publication SEBM025118
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What's inside
From the manual's own table of contents: 41 topics. See sample pages (PDF, 691 KB)
- No. of page
- GENERAL
- STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
- TESTING AND ADJUSTING
- DISASSEMBLY AND ASSEMBLY
- OTHER SPECIFICATIONS (PC78US-6 For Norway)
- OTHERS
- color
- Initial value
- Good
- Sectional drawing of assembly
- Single view disassembly drawing of reduction gear assembly
- Parts list
- Tools
- Tightening torque
- Weight table
- Disassembly
- Maintenance standard
- Assembly
- Performance test
- Clearance adjustment parts dimension table
- Specification dimensions drawing
- Working range drawing
- Specifications
Show all 41 topics
- Weight table
- Arrangement of hydraulic components
- Solenoid valve
- Accumulator for PPC
- Dimensions of each part of work equipment
- Boom hydraulic anti-burst valve
- Electric control system
- General system diagram
- Overload alarm function
- Overload alarm pressure sensor
- Meter display unit
- Connector types and mounting locations
- Connector arrangement diagram
- Explanation of functions of electric system control mechanism
- Dysplay and special functions of monitor panel
- Troubleshooting for controller pump control system (C mode)
- Troubleshooting for machine monitor system (M mode)
Inside this manual
Real pages from this service manual (1,026 pages). Open the sample pages (PDF, 690 KB)
- Specifications, page 134: Unit: mm
- Troubleshooting, page 389: POINTS TO REMEMBER WHEN TROUBLESHOOTING
- Diagram, page 974: Serial No.: 6501 and up
- Foldout diagram, page 1,025: ELECTRICAL CIRCUIT DIAGRAM
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the PC78US-6 are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
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This is a service manual
Here's how it compares to the other manual types.
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 1,026 pages
Quantity one is the manual described above.
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60-day returns
Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy
Binder not included
Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.
Other editions and similar models
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).