I; General 1.7 Precautions for Service Work (1) Precautions for Safety Read the safety precautions given at the beginning of this manual carefully and always mind safety in work. (2) Preparation for Service Work Preparation is necessary for accurate, efficient service work. Check the customer ledger file for the history of the engine.
P-1) (2.2) Preceding service date Period/operation hours after preceding service Problems and actions in preceding service (2.3) (2.4) (2.5) Replacement parts expected to be required for service Recording form/check sheet required for service (3) Preparation before Disassembly (3.1) Prepare general tools, special service tools, measuring instruments, oil, grease, non- reusable parts, and parts expected to be required for replacement. (3.2) When disassembling complicated portions, put matchmarks and other marks at places not adversely affecting the function for easy reassembly.
(4) Precautions in Disassembly (4.1) Each time a parts is removed, check the part installed state, deformation, damage, roughening, surface defect, etc. Arrange the removed parts orderly with clear distinction between those to be replaced and those to be used again. Parts to be used again shall be washed and cleaned sufficiently . Select especially clean locations and use clean tools for disassembly of hydraulic units such as the fuel injection pump. (4.2) (4.3) (4.4) (5) Precautions for Inspection and Measurement (5.1) Inspect and measure parts to be used again as reuqired to determine whether they are reusable or not.
(6) Precautions for Reassembly (6.1) Reassemble correct parts in correct order according to the specified standards (tighten- ing torques, and adjustment standards). Apply oil to important bolts and nuts before tight- ening when specified. (6.2) Always use genuine parts for replacement. (6.3) Always use new oil seals, O-rings, packings and cotter pins. (6.4) Apply sealant to packings depending on the place where they are used. Apply oil or grease to sliding contact portions, and apply grease to oil seal lips. (7) Precautions for Adjustment and Check (7.1) Use measuring instruments for adjustment to the specified service standards. l-12