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 TM 55-1905-220-14-10
5-19.1. CAMSHAFT ASSEMBLY AND GEAR TRAIN - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION (Cont)
f.
When the thrust surfaces of a camshaft are ground
undersize, a radius of 1/32" to 3/32" must be maintained
between the bearing surface of the thrust collar shoulder
and the bearing surface of the camshaft. A fillet radius
gage may be used to measure the specified radii.
g. Inspect the bushings in the front and rear camshaft end
bearings. Replace the bushings if they are worn
excessively or have turned in the bearing. New bushings
must be finish bored to a 20 R.M.S. finish after
installation and checked for the proper press fit, which is
indicated if the bushings will not move when a 2000
pound end load is applied. Also, the inside diameter of
the bushings must be square with the rear face of the
bearing within .0015" total indicator reading and
concentric with the outside diameter of the bearing
housing within .002" total indicator reading. The
bushings must project .045" to .055" from each end of
the rear camshaft end bearings. The bushings in the
front camshaft end bearings must be flush with the ends
of the bushing bore.
5-332
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