T.O. 35C2-3-442-2
P-9-TM-457-35
TM-07464A-35
TM 5-6115-457-34
Table 2-3. Troubleshooting (Continued)
MALFUNCTION
PROBABLE CAUSE
CORRECTIVE ACTION
GENERATOR SET (Continued)
11. Generator frequency
c. Precise governor
c. Align system
erratic (NO LOAD).
system not properly
(continued)
aligned.
d. Test and replace if defec-
d. Defective hydraulic
pump (precise gene-
tive (paragraph 8-94 or
8-98).
rator sets).
e. Defective precise
e. Test and repair if defective
generator actuator.
(paragraph 8-110 thru
8-115).
f. Test and repair if defec-
f. Defective precise gov-
ernor control unit.
tive (paragraph 6-202).
g. Defective precise or
g. Test relay box (para-
mode H relay box (pre-
graph 6-189 or 6-107).
cise generator sets).
h. Defective exciter
h. Test exciter regulator
regulater.
12. Frequency drifts
a. Defective governor
a. Test and repair if defec-
under steady load
control unit.
tive (paragraph 6-202).
(precise generator
b. Test and repair if defective
b. Defective precise
sets).
(paragraph 8-110 thru
governor actuator.
8-115).
c. Defective hydraulic
c. Test and replace if defective
(paragraph 8-94 or 8-98).
pump.
13. Generator set fre-
a. Defective mode II or
a. Test relay box (para-
quency regulation is
precise relay box.
graph 6-107 or 6-189).
not isochronous (pre-
cise generator sets).
2-37
Change 3
