TM 5-6115-596-14
Table 5-3.
Direct and General Support Troubleshooting
(Continued)
Corrective Action
Probable causes (tests)
Malfunction (symptoms)
(remedies)
c. Check for defec-
c. Defective rheostat
5. Continued
tive rheostat
(generator sets
923-001 thru 923-
Replace defec-
553) .
tive rheostat
(4-27 through
4-30).
d. Replace brushes
d. Brushes making poor
if approaching
contact with com-
their minimum
mutator.
length (para.
5-22c). Seat
and run-in
brushes (para.
5-25) .
e. Replace arma-
e. Short-circuited
ture (para. 5-
armature.
25).
f. Replace housing
f. Short-circuited or
grounded field
windings.
a. Seat and run-in
a. Brushes not properly
7. Excessive sparking
brushes (para.
seated on commutator.
at brushes.
5-25).
b. Replace arma-
b. Open-circuited or
ture (para. 5-
short-circuited
20).
armature.
c. Replace housing
c. Short-circuited
field winding.
d. Resurface com-
d. Pitted or eccentric
mutator (para.
commutator.
5-23b).
e. Replace ball
e. Worn ball bearings.
bearings (para.
5-20).
a. Disassemble and
a. Obstruction in air
8. Generator overheats.
clean generator
passages.
and 5-21).
b. Replace cooling
b. Broken cooling fan.
fan (para. 5-
20).
c. Replace insula-
c. Grounded insulated
ted tube (para.
brush.
5-20).
d. Replace arma-
d. Open armature
ture (para. 5-
winding.
20).
Change 2 5-7
