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TM 10-4320-343-14
Table 4-2.1. Unit Troubleshooting Table (Model 350 PAFN). (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE WILL NOT CRANK (CONTINUED).
Step 4
Test battery (paragraph 4.12.1).
a. Recharge battery if charge is low, but battery is otherwise good.
b. Replace battery (paragraph 4.12.2) if it fails to hold a charge.
Step 5
Test system wiring (paragraph 4.12.4.1).
Replace system wiring harness (paragraph 4.12.5.1) or replace individual defective wires as
appropriate.
Step 6
Test control panel (paragraph 4.13.2.1).
Repair control panel (paragraph 4.13.3 through 4.13.10) as required.
Step 7
Test V-belt contact switch (paragraph 4.10.9)
Replace V-belt contact switch (paragraph 4.10.10) if defective.
Step 8
Test wiring harness (item 9, Figure 4-52) for continuity and shorts.
a. Replace wiring harness (paragraph 4.14.1) if defective.
b. If wiring harness is not defective, replace pressure controller (paragraph 4.14.2).
Step 9
Check for 12 Vdc at bottom terminal of starter solenoid (Figure 4-17) to ground while attempting to start
engine.
Replace starter (paragraph 4.10.13) if no voltage.
Step 10
Remove V-belt guard (paragraph 4.10.6) and attempt to rotate engine crankshaft by hand at the
crankshaft pulley.
Replace starter (paragraph 4.10.13) if crankshaft can be turned by hand.
Step 11
Notify Direct Support Maintenance.
2. ENGINE WILL NOT START.
WARNING
Do not smoke or use spark or flame producing equipment while troubleshooting.
Move equipment off line and have a fire extinguisher at hand when troubleshooting
involves electrical circuits.
Failure to heed these warnings may result in death or serious injury of personnel.
4-10.2 Change 1
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