TM 5-6115-465-34
NAVFAC P-8-625-34
TO 35C2-3-446-2
TM 06858B/06859D-34
TROUBLESHOOTING (CONT)
Table 2-2.
MALFUNCTION
PROBABLE CAUSE
CORRECTIVE ACTION
11. Engine oil con-
c. Worn, broken, or stuck piston
c. Replace piston rings (para. 3- 55).
sumption excess-
rings (20, figure 3-50).
ive (Cent)
d. Replace valve guides, valves, and
d. Worn valve guides, valve stems, or
valve stem seals (figure 3-44).
seals (para. 3- 53).
e. Oil return passages clogged
e. Clean oil return passages (para.
12. Engine oil
a. Dirty, sticking, or defective oil
a. Clean, repair, or replace defect-
pump pressure relief valve (4,
pressure low
ive oil pump pressure relief valve
b. Main bearings worn (figure 3-50).
b. Replace main bearings (para. 3-55)
c. Defective oil pump (figure 3-30).
c. Repair or replace oil pump (para.
d. Worn camshaft bearings (figure 3- 51).
d. Replace camshaft bearings (para.
13. Battery charg-
a. Battery charging alternator voltage
a. Adjust or replace battery charging
ing ammeter
regulator out of adjustment or de-
alternator voltage regulator and
s hews no charge
cover assembly (para. 3-5).
fective.
when batteries
are low
b. Defective alternator rotor (figure
b. Repair or replace alternator rotor
c* Worn alternator brushes (figure
c. Replace alternator brushes (para.
d. Defective diode rectifier assembly
d. Replace diode rectifier and plate
assembly.
14. Generator fails
Defective voltage regulator assembly
Test and repair regulator (para. 5- 13)
to build up rated
voltage or volt-
age goes to "0"
when START-
RUN-STOP
switch is releas-
ed.
14.
No voltage ob-
Field flash circuit.
Perform static check of field
served during
flash circuit. Refer to Oper-
ator/Organizational
Mainte-
nance Manual for generator
set schematic and wiring
diagrams (para 5-16.1).
15. Generator no-
Test and repair voltage regulator
Defective voltage regulator (figure 5-30).
load terminal
voltage too low
or too high
16. Generator ter-
Test and repair voltage regulator
Defective voltage regulator (figure 5-30).
minal voltage
unstable
17. Main load con-
a . Check switch S3. Replace if
a. Defective contactor switch S3.
tactor fails to
defective.
close
b. Repair or replace main load con-
b. Defective main load contactor (figure
tactor (para. 5-6).
5-2).
2-6
Change 5
