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 TM 55-1905-223-24-18-2
Table 4-2. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Propeller Shaft Assembly
1. Objectionable shaft vibration.
STEP 1. After shaft assembly is removed, check for straightness according to construction drawings.
Replace shaft. Refer to paragraph 4-23 .
2. Bent shafting.
STEP 1. Inspect shaft assembly in vessel for any bends.
Replace shaft assembly. Refer to paragraph 4-23 .
STEP 2. Inspect shaft assembly under water for any bends.
Replace shaft assembly. Refer to paragraph 4-23 .
3. Stern tube hot to touch with hand.
STEP 1. Check to see that S.W. valve 13 or 14 is open and thin stream of water is trickling past stuffing
box gland.
Replace stern tube bearing. Refer to paragraph 4-23 .
4. Erratic vibrations, not attributed to shaft rpm or propeller blade frequency.
STEP 1.
Require diver inspection of propellers, cone nut and glands, for damage or bent propeller
blades.
Replace propeller. Depot maintenance in shipyard drydock facility required. Replace propeller
hub gland packing. Refer to paragraph 4-23 .
4-3
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