TM 5-4320-300-14
6-9. VALVES, CAMSHAFT, AND TIMING GEARS (CONT)
Location/Item
Action
Remarks
INSPECTION OF
CAMSHAFT AND
BALANCE SHAFT
17. Cams and
Inspect for wear and scoring. If cams are scored,
journals
inspect cam follower rollers in accordance with
paragraph 6-7. Replace camshaft if cams or
journals are worn or scored. Replace balance
shaft if journals are worn or scored.
18. Camshaft and
Replace camshaft or balance shaft if either is
balance shaft
bent or damaged.
19. Contact sur-
Examine surfaces which thrust washers contact;
faces
if surfaces are scratched but not severely scored,
smooth them down with an oil stone. If the
score marks are too deep to be removed, replace
camshaft or balance shaft.
20. Shaft and
Measure the inside diameter of the camshaft or
bearing
balance shaft bearing at 90 degree axis as shown.
clearance
Then measure the outside diameter of the appro-
priate camshaft or balance shaft bearing
journal. The clearance (difference between meas-
urements) for new camshaft or balance shaft
bearings should be 0.0045 to 0.006 inch (0.1143
to 0.1524 mm) or for worn parts a maximum of
0.008 inch (0.2032 mm). Replace shafts or bear-
ings as needed to restore tolerance.
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