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 TM 55-1905-219-14-10
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 bear-
ing 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 installa-
tion 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 read-
ing and concentric with the outside diameter
of the bearing housing within .002" total
indicator reading. The bushings must pro-
ject .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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