TM 5-3820-233-35/1
Possible Remedy
Probable Cause
Possible Remedy
Probable Cause
Clean injector spray tip
Insufficient fuel
Replace
valve seats
orifices (para 40)
(para
42)
Replace injector spray
Replace
injector tubes
tips (pars 40)
(para
42)
Replace injector plunger
and bushing assembly
10. Engine Lacks Power
(para 40)
Possible Remedy
Probable Cause
Time injector rack and
Replace piston assem-
Piston assemblies worn
gear (Operator's
blies (para 45)
Manual)
Repair defective water
High engine temperature
Replace gear and shaft
Worn fuel pump gears
caused by defective
pump (para 33)
assembly in pump
or pump housing
water pump
body (para 35)
Time gear train (para 50)
Improper gear train
Check blower drive,
Fuel pump not rotating
timing
if broken, replace
necessary parts
11. Engine will not Turn
(para 36)
Check fuel pump drive
Possible Remedy
Probable Cause
gear and shaft, if
Disassemble engine to
Engine is locked or
broken, replace
determine the cause
seized
necessary parts
and replace necessary
(para 35)
parts
Replace fuel pump
(Operator's Manual)
12. Low Cranking Speed
Possible Remedy
Probable Cause
14. Low Oil Pressure
Check brush spring
Starter brush springs
tension, replace springs
weak
Possible Remedy
Probable Cause
if necessary (para 29)
Remove and clean oil
Poor circulation
Polish commutator,
Starter commutator
cooler core (Operator's
machine commutator
dirty or worn
Manual)
and under-cut mica
Replace oil cooler by-
if necessary (para 29)
pass valve
Replace armature (para
Starter armature burned
(Operator's Manual)
out
29)
Replace oil pressure
regulator valve
13. Engine Hard to Start
(Operator's Manual)
Check if gallery, crank-
Possible Remedy
Probable Cause
shaft or camshaft
Check for bent valve
Exhaust valves ticking
plugs are missing and
guide and replace if
or burned
replace if parts are
necessary (para 42)
missing.
Check for defective valve
Replace oil pump
Faulty oil pump
spring and replace if
(para 44)
necessary (para 42)
Clean screen (para 44)
Dirty oil pump inlet
Clean and reface valve
screen
(para 42)
Replace rings (para 45)
Compression rings worn
or broken
15. Engine Overheats
Replace gasket (para 42)
Cylinder head gasket
Possible Remedy
Probable Cause
leaking
Check for proper
Improper engine
Check exhaust valve
Improper valve
operation of engine
lubrication
clearance and adjust
clearance
oil pump (para 44)
to the correct
Check water pump for
Poor circulation
clearance (Operator's
a loose or damaged
Manual)
impeller, and replace
Inspect blower drive
Blower inoperative
parts if necessary
shaft and coupling,
Replace radiator
Damaged radiator
and replace parts if
(para 32)
necessary (para 36)
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