SER. NO. HY2870001~
To insure a long life for the machine and the engine and to prevent failure and problems,
proper operation, maintenance and repairs are imperative.
This service manual includes an “outline,” “structure and operation,” “inspection and ad-
justment,” “disassembly and assembly,” “standard maintenance,” and “repair and replace-
ment of parts” of the machine which are necessary to carry out the inspections and repairs
in the repair shop.
We trust that this manual will help you to effectively carry out the necessary. Repairs
should they arise, also provide a accurate description of the product, and the correct
Precautions on Maintenance
Hydraulic Oil Filter
Pilot Valve (1)
10. Pilot valve (2)
11. Pilot Valve (3)
12. Slew Motor
13. Travel Motor
14. Hydraulic Cylinder
15. Swivel Joint
17. Spring Case and Grease Cylinder
20. Track Roller
21. Carrier Roller
22. Electrical Equipment
1 PRECAUTIONS ON MAINTENANCE
1. Correct operation
Correct operation means to follow the correct “procedure” and “method.”
Procedure focuses on speed and accuracy of each job.
In the method, are addressed what type of facility, tools, instruments, materials, oil should
be used, how and which part should be checked, adjusted or disassembled, and what
matters to attend to.
2. Precautions on operation
1. Safety check
Check that stoppers and sleepers are correctly installed for the vehicle jack-up
Prepare all of the tools and inspect and adjust the instruments.
3. For efficiency
1) Understand the state before disassembly.
What is the problem? Is disassembly absolutely necessary?
2) Before disassembly
Determine whether match marks are necessary. For the electrical system, discon-
nect the cable from the battery terminal.
3) Precautions for disassembly
In stead of checki