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TM 5-4210-220-12
Table 3-1. OPERATOR TROUBLESHOOTING.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1a
APU FAILS TO CRANK
Step 1. Battery switch in cab set to OFF.
Set battery switch to BOTH.
Step 2. Batteries low on charge.
Start engine manually, (see para. 2-12).
1b
APU CRANKS BUT WILL NOT START
Step 1. Fuel tank empty.
Refuel vehicle.
Step 2. Intake air too cold to enable initial combustion.
Use ether-type starting aid, (see para. 2-12).
1c
APU RUNNING UNEVEN AND STALLS FREQUENTLY
Step 1. Fuel tank empty.
Refuel vehicle.
Step 2. Truck batteries low on charge making alternator hard to drive.
a. Start main engine, then APU.
b. If main engine won't start, refer to Organizational Maintenance.
3-4
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