TM 5-3825-230-14&P
b.
Cleaning/Inspection.
NOTE
Oversize bearings are available at 0.010 and 0.020 in. (0.25 and 0.50 mm).
(1)
Inspect crankshaft for scratches and grooves.
(2)
Measure five crankshaft journals using calipers:
(a)
Shaft end (flywheel side) 2.8338 to 2.8346 in.(71.98 to 72.00 mm).
(b)
Two connecting rod journals 1.5748 to 1.5755 in. (40.00 to 40.02 mm).
(c)
Center support journal 2.1787 to 2.1791 in. (55.34 to 55.35 mm).
(d)
Shaft end (drive side) 2.1625 to 2.1633 in. (54.93 to 54.95 mm).
(3)
Replace crankshaft if journal dimension is out of tolerance.
(4)
Check crankshaft clearance bores in crankcase using calipers:
(a)
Clearance (flywheel side) 0.0027 to 0.0043 in. (0.0685 to 0.1092 mm).
(b)
Clearance (drive side) 0.0019 to 0.0031 in. (0.0482 to 0.0787 mm).
(5)
If clearance is not within tolerances, check respective crankshaft journal. If journal diameter is acceptable
replace respective bearing and recheck tolerances. If crankshaft journal diameter is not acceptable,
replace crankshaft .
(6)
Inspect crankshaft for straightness using a dial indicator at center support bearing journal. Runout should
not exceed 0.0019 to 0.0031 in. (0.0482 to 0.0787 mm).
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