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 TM 10-3930-660-24-2
CRANKSHAFT MAINTENANCE - CONTINUED
0271 00
INSPECTION
See Inspection instructions (WP 0317 00).
1.
2.
Inspect for large, deep cracks or broken material throughout the crankshaft, especially in the fillet and journal areas.
3.
Inspect for a high concentration of depressions or pitting.
4.
Inspect for burning or scoring in the journal areas.
5.
If any of the conditions mentioned in steps 3 thru 5 above exists, replace the crankshaft.
6.
Measure crankshaft main bearing journals. If any main bearing journal measures less than 3.2662 in. (82.9614 mm),
replace the crankshaft or use oversize bearings. If any main bearing journal is out of round by more than 0.0020 in.
(0.0508 mm), replace crankshaft or machine crankshaft and use oversize bearings.
7.
Measure crankshaft connecting rod journals. If any connecting rod journal measures less than 2.7150 in. (69 mm),
replace the crankshaft or use oversize bearing. If any connecting rod journal is out of round by more than 0.0020 in.
(0.0508 mm), replace crankshaft or machine crankshaft and use oversize bearings.
409-907
409-906
8.
Inspect main bearing bores for damage or abnormal wear (WP 0272 00).
9.
Measure diameter of main bearing bores (WP 0272 00).
10.
Inspect and measure connecting rod bearings (WP 0277 00).
0271 00-6
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