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TM 5-4210-220-34
3-8.
ENGINE - Continued
3-8.10
Crankshaft - Continued
(2)
Inspect the keyways for evidence of cracks or wear. Replace the crankshaft if any significant damage is
present.
(3) If the crankshaft shows any signs of overheating, blueing or oil carbonization on the journal surfaces
especially, replace the crankshaft.
(4) Inspect the rear oil seal contact surface. The crankshaft may be fitted with an oil seal sleeve (13). If the oil
seal contact surface is excessively grooved or worn, replace the sleeve or install a sleeve.
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