Inspection Procedure 2: Noise and Vibration at High Speed
INSPECTION PROCEDURE 2: Noise and Vibration at High SpeedDIAGNOSIS
STEP 1. Check the propeller shaft run-out.
Q: Is the measured value within the limit: 0.6 mm (0.02 inch)?
YES: Go to Step 2.
NO: Replace the propeller shaft. Then go to Step 4.
STEP 2. Check the propeller shaft snap rings thickness.
Q: Are they correct?
YES: Go to Step 3.
NO: Replace the snap ring. Then go to Step 4.
STEP 3. Check the propeller shaft journal bearings for wear or damage.
Q: Is wear or damage apparent?
YES: Replace the journal bearing. Then go to STEP 4.
NO: Go to Step 4.
STEP 4. Retest the system.
Q: Is the abnormal noise eliminated?
YES: The procedure is complete.
NO: Recheck from Step 1.