TM 5-4210-233-14&P-2
6-29. MAIN BEARINGS AND CRANKSHAFT - Contlnued
(6) Inspect crankshaft keyways (8) for cracks or damage. Replace crankshaft (1) if damaged.
(7) Inspect rear oil seal (9) contact surface for deep scratching. If scratches cannot be smoothed out
with crocus cloth, replace crankshaft (1).
(8) Inspect crankshaft thrust surfaces (1 0) for grooving. Replace crankshaft (1) if deep grooves have
been scratched in thrust surfaces.
(9) Inspect timing gear (1 1) for chipped teeth. Replace if damaged. See table C.
(10) Measure and note thickness of two thrustwashers (12).
Table a.
Main Bearing and Connecting Rod Journal Diameter Specifications
Minimum Diameter (Main Bearing Journals)(13, 14, 15, 16, and 17).....................4.4985 in. (114.26 mm)
(Connecting Rod Journals)(18) ....................................................2.9985 in. (76.16 mm)
Maximum Journal Out of Round (All Journals) .....................................................0.0005 in. (0.013 mm)
Maximum Taper (All Journals)..............................................................................0.0004 in. (0.010 mm)
Table b.
Main Bearing and Connecting Rod Journal Width Specifications
Maximum Width (Main Bearing Journals) (13, 15, 16, and 17)............................... 1.505 in.
(38.23 mm)
(Main Bearing Journal) (14) .......................................................... 1.501 in.
(38.12 mm)
(Connecting Rod Journals)(18) ..................................................... 2.652 in.
(67.36 mm)
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