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SYMPTOMS & PROBABLE CAUSES
Lack of Power
(1)
(2 )
(3 )
(4)
(5 )
Lack of compression
Improper adjustment of
injection system
(a) Improper injection timing
(b) Injectors misfiring
(c) Low injector pressure
Lack of fuel
(a) Air in fuel system
(b) Filter clogged
(c) Fuel tank contaminated
Lack of intake air
Overheating
(a) Lack of cooling water
(b) V-belts loosened
(c) Heat exchanger clogged
(d) Improper injection timing
(e) Lack of engine oil
Excessive Oil Consumption
(1) Oil leakage
(a) Faulty oil seals
(b) Gear case gasket damaged
(c) Gear case bolts loosened
(d) Drain plug loosened
(e) Oil pipe connector
loosened
(f) Rocker cover gasket
damaged
(g) Rocker cover bolts
loosened
(2) Oil up
(a) Piston ring end gaps
incorrectly positioned
(b) Connecting rod tilted or
distorted
(c) Wear of piston ring
(d) Wear of piston and
cylinder
(3) Oil down
(a) Faulty stem seal
(b) Wear of valve and valve
guide
REMEDY
See "Lack of Compression" under
"Hard Starting"
Adjust injection timing
Overhaul or replace injectors
Check injector nozzle, and adjust
injector pressure
Check connections and fuel tank
Replace filter
Clean tank and replace filters
Check air intake for obstruction
Replenish water (check for leaks)
Adjust or replace
Clean
Correct injection timing
Replenish engine oil (check for
leaks)
Replace oil seals
Replace gasket
Tighten bolts
Tighten plug
Tighten connector bolt
Replace gasket
Tighten bolts
Correct ring positions
Replace connecting rod
Replace ring
Replace piston and rebore cylinder
Replace stern seal
Replace valve and valve guide
33
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