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TM5-4210-229-14&P
6-9. CAMSHAFT AND GEAR MAINTENANCE (Continued).
(2) Camshaft.
(a) Take reading across A-C and across B-D.
(b) Subtract B-D from A-C. This will give
the cam lobe lift. Cam lobe lift shall be
0.2935 inch (7.455 mm).
(c) Replace camshaft when cam lobe wear
limit of 0.020 inch (0.51 mm) has been
reached for any lobe.
e. Visually inspect thrust plate for wear, cracks
and distortion. Then, check for specified shaft
end clearance of 0.005 to 0.013 inch (0.13 to
0.33 mm). Replace thrust plate if clearance is
excessive or if plate is worn or damaged.
f. Inspect camshaft drive gear for worn or damaged
teeth. If the bore of the gear is widened by
repeating pressing so a tight fit is no longer
possible, replace the gear with a new one.
g. Inspect bushings for wear. If worn, remove them
and replace with new bushings.
(1) Remove the flywheel and flywheel housing
(paragraph 6-13).
(2) Using a Camshaft Bearing Service Set, with
back-up nut and expanding collet, pull the
bushings out of the crankcase.
(a) Remove the front and rear bearings
first.
(b) Pull the two intermediate bearings out
the front of the crankcase.
(c) When bushings are removed, inspect
bushing bores in crankcase for burrs or
other roughness liable to damage bush-
ings when installed.
INSTALLATION
CAUTION
The bushing oil holes (1) and crankcase oil
holes (2) must line up.
6-19
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