SER. NO. HY2270001~
To insure a long life for the machine and the engine and to prevent failure and prob-
lems, proper operation, maintenance and repairs are indispensable.
This service manual includes an “outline,” “structure and operation,” “inspection and
adjustment,” “disassembly and assembly,” “standard maintenance,” and “repair and re-
placement of parts” of the machine which are necessary to carry out the inspections and
repairs in the repair shop.
We hope that this manual helps you to efficiently and effectively carry out repairs by
providing and accurate description of the product and the correct repair techniques.
Precautions on Maintenance
Hydraulic Oil Filter
10. Travel Motor
11. Hydraulic Cylinder
12. Swivel Joint
14. Spring Case and Grease Cylinder
17. Track Roller
18. 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, disconnect
the cable from the battery terminal.
3) Precautions for disassembly
In stead of checking all of the disassembled parts at once, check each part
individually as it is disassembled. When removing the hydraulic unit or the hoses,