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 2-8
ENGINE
ENGINE KNOCKS (FUEL)
Check for defective glow plugs (p 4-19).
Test for defective fuel injection pump.
A Adjust fuel injection pump (model PSU, p 4-7; model 50, p 4-7).
Retime fuel injection pump to engine (model PSU, p 4-7; model 50, p 4-7).
B
c
Replace defective or worn parts (model PSU, p 3-64; model 50, p 3-80).
D Replace defective fuel injection pump (model PSU, p 3-72; model 50, p 3-88).
Test for defective fuel injector nozzles.
3
A Perform nozzle assembly test and adjustment
procedures (p 4-13).
B Service nozzle and holder assembly (p 3-25).
4
Inspect valve seats (p 3-42).
A Reface or replace valve seat insert (p 3-42).
Reface or replace valve if required (p 3-40).
B
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