TM 10-4320-307-24
4-15
CAMSHAFT ASSEMBLY INSPECT/REPAIR/REPLACE (CONT).
3.
Inspect camshaft (1) as follows:
a.
Check for cracks, breaks, or pits. Replace camshaft (1) if damage is present.
b.
Inspect cams and bushing journals for wear and scoring. If cams are scored, inspect cam followers in accor
dance with paragraph 3-33. Replace camshaft (1) if excessive scoring is noted. Minor nicks or scratches on
cams may be repaired with surfacing stone. Do not attempt to repair journals.
c.
Measure outside diameter of camshaft bushing journals, using micrometer. If any of the seven journals does
not measure between 2.495 inches (63.37 mm) and 2.497 inches (63.42 mm), replace camshaft (1).
4.
Inspect camshaft gear (2) for cracks, broken or chipped teeth or pitting. Replace gear if damage is present or if
pitting extends over more than 1/4 width of tooth.
NOTE
Minor nicks, burrs, or wear on gear may be smoothed out with crocus cloth.
5.
Inspect thrust washer (3) as follows:
a.
Check for cracks, breaks, or pits. Replace thrust washer (3) if damage is present.
b.
Measure thickness of thrust washer (3) with micrometer. Discard if thickness is less than 0.090 inch (2.29 mm).
6.
Use a feeler gage to measure clearance between camshaft gear (2) and shoulder on camshaft (1). The clearance
must not exceed 0.005 inch (0.13 mm).
4-108
