TM 5-6115-376-13
Section IV. TROUBLESHOOTING
92330205-14, and for troubleshooting on the
4-7. General
M54A2 truck refer to TM 9-2320-211-10.
For organizational maintenance troubleshooting
on the diesel engine generator sets, refer to TM
5-6115-239-10 or TM 5-6115-247-15 (45KW),
Refer to table 4-2 for organizational troubleshoot-
or to TM 5-6115-425-12 (60KW), For trouble-
ing of the distribution boxes and switchboxes.
shooting on the M200A1 trailer, refer to TM
Table 4-2. Troubleshooting (Organizational)
Probable cause
Corrective action
Malfunction
Distribution Box
Poor connections, or power not on
Check that all connections are secure
1. Ammeters don't register or are
and power is on
erratic
Replace a defective switch, clean con-
Faulty contacts or defective switch
2. Circuit breaker switches inopera-
tacts
tive
Replace defective connector-recep-
Burred, or corroded
3. Connector-receptacle cracked, bent
tacles
or corroded
a. Apply power
4. Indicator lights won't glare
a. Power off
b. Replace lamp
b. Lamp out
c. Replace socket
c. Bad socket
Replace individual wires
50 Defective wiring
Loose, or burned wiring
Portable Distribution Boxes
1. Lamps do not glow
Check input power connection and
Power off, or load off or lamp burned
load connections. Replace a defec-
out
tive bulb.
2. Circuit breaker switches inopera-
Replace a defective switch, check
Faulty connections or defective switch
connections
tive
3. Duplex sockets cracked or holes
Replace socket
Excessive wear
enlarged
Replace connector
4. Power inlet Connations faulty
Bent or broken pins, cracked con-
nector
Synchronizer Assembly (PU-407/M)
1. Synchronizer assembly fails to
a. Tighten or replace
a. Power cable input receptacle loose
supply power
or defective
b. Tighten or replace
b. Power cable output receptacle
loose or defective
c. Relay switch defective
d. Replace toggle switch
d. Toggle switch defective
e. Adjust, repair, or replace auto-
e. Automatic switch defective
matic switch
f. Replace synchronizer
f. Synchronizer defective
g. Replace wiring
g. Wiring defective
2. Pilot lamp fails to operate
a. Repair or replace wiring
a. Defective wiring
b. Replace lamp
b. Lamp defective
c. Tighten terminal
c. Loose terminal
Switch Box (PU-699/M)
1. Circuit breaker switches inopera-
Faulty connection or defective switch
Check connections; replace adequate
tive
switch
2. Input and/or output receptacles
Tighten or replace receptacle
Input and/or output receptacles loose
loose or defective
or defective
