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TM 5-4320-306-24
4-8. REPLACE/REPAIR CAMSHAFT (Continued)
10
Measure inside diameter of bushing (9) with a precision bore gage at 90 degree axes (10) as shown. Diameter
should be 1.8890 to 1.8911 inches (47.981 to 48.034 mm). If diameter is outside specified limits, replace
bushing in accordance with paragraph 4-13.
11
Measure outside diameter of bearing journal (6). Diameter should be 1.8902 to 1.8950 inches (48.011 to 48.133
mm). If diameter is outside specified limits, replace camshaft (1).
12
The radial clearance (difference between above measurements) for new camshaft bushing (9) should be 0.0012
to 0.0039 inch (0.031 to 0.099 mm) or for worn parts a maximum of 0.0079 inch (0.200 mm). Replace bearing
journal or bushing as needed to restore tolerance.
13
Remove dished plug (11) from crankcase (12) and discard. Measure rear camshaft bore in crankcase (13).
Record measurement.
14
Measure diameter of rear journal (7). Record measurement.
4-60
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