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 54. TROUBLESHOOTING LUBRICATION SYSTEM - Continued
Corrective action
Probable causes
Malfunction
--.
a
Replace coolant thermo-
--.
a
Defective coolant system
5.
Low engine oil tem-
stat (par. 76).
thermostat or the thermo-
perature (winter
stat has improper heat
operation).
range.
Replace defective water
--.
b
b.
Defective water temper-
temperature sending unit
ature sending unit.
--.
a
Refer to 4, above.
--.
a
High oil temperature.
6.
Excessive oil
consumption.
b.
Remove crankcase
Restricted crankcase
b.
breather tube (par. 62).
breather tube or adapter.
Remove crankcase
breather adapter (par.
crankcase breather. In-
stall crankcase breather
adapter (par. 283c). In-
stall crankcase breather
tube (par. 62).
Disassemble engine (pars.
c.
Worn piston rings, pistons,
c.
or liners.
and inspect parts. Re-
place worn or damaged
parts. Assemble engine
Remove cylinder head or
d.
Worn valve stems or
--.
d
heads (par. 94 b). Disas-
guides.
semble cylinder heads
(par. 198). Replace
valves and valve guides
inder head or heads when
necessary. Assemble
cylinder heads (par. 201).
Install cylinder head or
heads (par. 94g).
Replace broken fan belts
a.
Broken fan belts or
Engine overheats.
1.
a. (par. 61). Reverse
restricted radiator or
flush engine coolant sys-
engine coolant system.
tem (par. 110).
55
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