Table 2-1. Troubleshooting Chart - Continued
Malfunction
Probable cause
Corrective action
g. Injectors need adjustment
g. Adjust injectors (TM 5-3810-232-12).
4. Low Power or Loss or
a. Incorrect fuel pressure
a. Check and adjust pressure (TM 5-3810-232-12).
Power
b. Plugged injector spray
b. Remove, clean or replace injectors (TM 5-3810-232-2).
holes
c. Scored gear pump or
c. Repair fuel pump (para 3-18, 4-21).
worn gears
d. High speed governor-
d. Adjust governor setting (TM 5-3810-232-12).
set to low
e. Gasket blow-by or leak-
e. Inspect and correct.
age
f. Valve leakage
f. Grind or replace valves (para 3-48, 4-42).
g. Broken or worn piston
g. Overhaul engine.
rings
h. Incorrect valve and in-
h. Retime valves and injectors (TM 5-3810-232-12).
jector timing
i. Injectors need adjust-
i. Adjust injectors (TM 5-3810-232-12).
ment
5. Excessive fuel consump-
a. Incorrect fuel pressure
a. Check and adjust fuel pressure (TM 5-3810-232-12).
tion
b. Defective injector cup
b. Inspect and replace (para 3-46, 4-39).
O-ring
6. Low lubricating oil
a. Oil suction line restric-
a. Inspect and correct
pressure
tion
b. Faulty oil pressure
b. Check and replace (para 3-67).
regulator
c. Incorrect bearing clear-
c. Inspect and correct (para 4-76).
ances
d. Engine due for over-
d. Overhaul engine.
haul.
7. Coolant temperature
a. Worn water pump
a. Replace water pump (para 3-36, 4-35).
too high.
b. Faulty thermostat
b. Replace thermostat (TM 5-3810-232-12).
c. Radiator core plugged
c. Clean or replace radiator (para 3-33, 4-29).
with dirt.
8. Lube oil temperature
a. Worn water pump
a.
Replace water pump (para 3-36, 4-35).
too high
b. Faulty thermostat
b.
Replace thermostat (TM 5-3810-232-12).
c. Clogged oil cooler
c.
Inspect and correct (para 4-75).
9. Main chain drive ex-
a. Defective chain
a.
Replace chain (TM 5-3810-232-12).
cessively noisy
b. Worn sprocket
b.
Replace sprocket (para 6-16).
e. Improper adjustment
c.
Adjust main drive chain. (TM 5-3810-232-12).
d. Improper or insufficient
d.
Refer to LO and lubricate.
lubrication
10. Crane hoist gears noisy
a. Worn gear teeth
a.
Replace gear (para 6-14).
b. Worn or scored bearings
b.
Replace bearings (para 6-14).
c. Bent hoist shaft
c.
Replace hoist shaft (para 6-14).
d. Improper or insuffi-
d.
Refer to LO and lubricate.
cient lubrication
11. Crane Swing Gear
a. Worn gear teeth
a.
Replace gear (para 6-20).
Noisy or Pulsates in
b. Worn or scored bearing
b.
Replace bearings (para 6-20).
operation.
c. Bent swing shaft
c.
Replace swing shaft (para 6-20).
d. Improper or insufficient
d.
Refer to LO and lubricate.
lubrication
12. Crane Boom or Hoist
a. Bent drive shaft
a. Replace drive shaft (para 6-18).
Operation Rough.
b. Inner boom gear
b. Replace gear bushing (para 6-15).
binding
c. Broken shaft bearings
c. Replace shaft bearings (para 6-14).
d. Improper or insufficient
d. Refer to LO and lubricate.
lubrication
13. Revolving Frame Teet-
a. Worn rollers
a. Replace hook rollers (TM 5-3810-232-12).
ers or Will Not
b. Swing clutches out of
b. Adjust swing clutch (TM 5-3810-232-12).
Swing adjustment
c. Broken vertical swing
c. Replace broken swing shaft of or related parts as re-
shaft or related parts.
quired.
2-2
