Doosan AD158TI, Operation & Maintenance Manual

Page: 35 / 294

General information - 29 -
4. GENERAL INFORMATION
4.1. General Repair Instructions
1. Before performing service operation, disconnect the grounding cable from the battery for reducing the
chance of cable damage and burning due to short-circuiting.
2. Use covers to prevent the disassembled parts and components from damage or pollution.
3. Engine oil and anti-freeze solution must be handled with care. They can cause damage for painted parts.
4. The use of proper tools or specified special tools is important to perform the efficient and reliable mainte-
nance operation.
5. Use genuine DOOSAN parts necessarily.
6. Used cotter pins, gaskets, O-rings, oil seals, lock washer, self-lock nuts and rubber coated seal ring etc.
should be discarded. New ones should be used for re-assembled parts. If these are reused, normal perfor-
mance can not be maintained.
7. To facilitate reassembling, keep disassembled parts neatly in groups. Fixing bolts and nuts for reassembled
parts should be reused at the original position. They are varied in hardness or length because they are
designed depending on their application.
8. Clean the disassembled parts prior to inspection or re-assembly. By using compressed air, make oil ports
and etc. of them free from any foreign material.
9. Lubricate the surface of rotating and sliding parts with oil or grease before installation.
10. If necessary, use sealant onto gaskets to prevent leakage.
11. Carefully obey all specified torque to tighten bolts and nuts
12. When maintenance is completed, make a final check to be sure it has been done properly.