TM 5-6115-465-12
TO 35C2-3-446-1
NAVFAC P-8-625-12
TM 06858B/06859D-12
Table 3-2.
Troubleshooting (Cont)
PROBABLE CAUSE
CORRECTIVE ACTION
MALFUNCTION
e. Improper grade of fuel or water
e. Drain main fuel tank (para. 3-49),
7. Engine knocks
in fuel.
fuel filters (para. 3-26, 3-43), and
(Continued)
day tank (para. 3-25). Service
system with clean fuel (para. 3-49).
8. Black smoke in
a. Improper grade of fuel.
a. Drain main fuel tank (para. 3-49), fuel
filters (para. 3-26, 3-43), and day
tank (para. 3-25). Service system
with clean fuel (para. 3-49).
b. Clean or replace injector nozzles
b. Dirty injector nozzles.
c. Service air cleaner (para. 3-24).
c. Dirty air cleaner.
d. Reduce load to rated level.
d. Generator set over-loaded.
9. Blue or white
a. Improper grade of fuel.
a. Drain main fuel tank (para. 3-49), fuel
smoke in
filters (para. 3-26, 3-43) and day
tank (para. 3-25). Service system
with clean fuel.
b. Engine operating temperature
b. Replace thermostat (para. 3-93).
too low due to defective thermo-
stat.
c. Crankcase oil level too high.
c. Drain crankcase and refill to proper
level (para. 3-4).
d. Defective nozzle holder assem-
d. Replace nozzle holder assembly (para.
bly.
e. Improper valve tappet clear-
e. Adjust valve tappet clearance (para.
ance.
10. Low oil
a. Low oil level.
a. Add oil to proper level on dipstick
pressure
b. Defective oil pressure gauge.
b. Replace oil pressure gauge (para.
c. Defective oil pressure trans-
c. Replace oil pressure transmitter
mitter.
d. Service oil filter (para. 3-4).
d. Clogged oil filters.
e. Improper viscosity oil.
e. Draink crankcase and refill with oil
of proper viscosity (lubrication order,
11. Engine over-
a. Low coolant level.
a. Check coolant level. Add coolant as
necessary (para. 3-31).
b. V-belt broken or out of adjust-
b. Adjust or replace v-belt (para. 3-90).
ment.
c. Defective thermostat.
c. Replace thermostat (para. 3-93).
3-21
