TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 796 of 1313
ALTERNATOR OVERCHARGING, BATTERY INDICATOR GAUGE IN RED POSITION - Continued
STEP
4.
DOES THE GAUGE READ HIGH AND THE ALTERNATOR OVERHEAT A SECOND TIME?
a.
Disconnect wire 568 at alternator. Refer to point to point schematics.
T0739DAA
568
568
568
Figure 4.
Alternator Wire 568.
b.
Allow alternator to cool.
c.
Reconnect wire 568.
d.
Start engine and run for approximately 10 minutes.
e.
Check indicator gauge.
f.
Check alternator for high temperature by holding hand NEAR alternator.
CONDITION/INDICATION
DOES THE GAUGE READ HIGH AND THE ALTERNATOR OVERHEAT A SECOND TIME?
DECISION
YES - Go to Step (5).
NO - Notify supervisor. Action may not be possible at this level of maintenance.
TM 9-2320-272-23-1
0091
0091-5
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