TM 9-2320-260-34-1
3-6. CRANKSHAFT FLANGE MAINTENANCE (Contd)
2. Check crankshaft flange (2) for wobble:
NOTE
Crankshaft must be kept at front or rear limit of thrust while
checking crankshaft flange wobble.
An assistant using a prybar can keep crankshaft at front limit of
thrust.
a. Position dial indicator with holding fixture on engine (1).
b. Position dial indicator plunger on face of crankshaft flange (3) and zero dial indicator.
c.
Using engine barring tool, rotate engine (1) and take reading. Replace crankshaft flange (2) if
reading exceeds 0.004 in. (0.10 mm) after 360 degree rotation of crankshaft flange (2). If wobble
persists, crankshaft maybe damaged.
FOLLOW-ON TASK: Install vibration damper (para. 3-5).
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