1.
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.
(2-1) Preceding service date
(2-2) Period/operation hours after preceding service
(2-3) Problems and actions
in
preceding service
(2-4) Replacement parts expected to be required for service
(2-5) 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.
(4-2) Arrange the removed parts orderly with clear distinction between those to be replaced and those to be
used again.
(4-3) Parts to be used again shall be washed and cleaned sufficiently.
(4-4) Select especially clean locations and use clean tools for disassembly
of
hydraulic units such as the
fuel injection pump.
(5)
Precautions
for
Inspection
and
Measurement
(5-1) Inspect and measure parts to be used again as required 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 (tightening torques,
and adjustment standards). Apply oil to important bolts and nuts before tightening 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.
1-14
4D92E,4D94LE,4D98E
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