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 TM 55-1905-221-14-3
Table 6-1. Troubleshooting (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
Check for broken drive or other internal damage. Overhaul power take-off assembly. Refer to
paragraph 6-37.
TRANSMISSION AND TRANSFER GEAR
1. Gear Inoperative (Drive Shaft Does Not Rotate).
Condition A - Selector valve in forward position.
Step 1.
Check for low oil pressure.
Replace defective oil pump relief valve. Refer to paragraph 6-36.
Step 2.
Check for defective oil pump.
Overhaul oil pump. Refer to paragraph 6-36.
Step 3.
Check for defective marine gear dump valve.
Clean, inspect and replace defective parts. Refer to paragraph 6-38.
Step 4.
Check for broken or worn selector valve forward piston seal rings.
Remove and replace forward piston seal rings.
Refer to paragraph 6-38.
Step 5.
Inspect for leaking pilot bearing oil seal.
Remove and replace pilot bearing oil seal.
Step 6.
Check for faulty flywheel.
a. Inspect flywheel and replace loose or missing passage plugs. Refer to paragraph 6-38.
b. Check emergency engagement bolts for tightness. Tighten loose bolts.
Step 7.
Check for damaged drive shaft seal rings.
Replace if worn or damaged. Refer to paragraph 6-28.
6-5
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