TM 10-4320-307-24
4-15
CAMSHAFT ASSEMBLY INSPECT REPAIR REPLACE (CONT).
ASSEMBLY:
Live steam used for cleaning shall not exceed 100 psi (690 kPa). During steam cleaning
operations, adequate ventilation, natural or forced, should be provided. Do not direct live steam
against skin.
Death or serious injury could occur if compressed air is directed against the skin. Do not use
compressed air for cleaning or drying unless the pressure is/has been reduced to 30 psi (2.11
kgcm2) or less. When working with compressed air always use chip guards, eye protection, and
other personal protective equipment.
1.
If a new camshaft is to be installed, steam clean camshaft to remove rust preventive.
2.
Blow out camshaft oil passages and dry camshaft with compressed air.
CAUTION
After camshaft has been steam cleaned, do not touch machined surfaces with bare hands. This will
cause rust to form. Lubricate camshaft before handling.
3.
Lubncate new camshaft (1) with clean lubricating oil
before handling.
4.
Inspect woodruff key (2) for damage and replace if
necessary.
NOTE
If new woodruff key is used, use the same part number key
as the one that is replaced.
5.
Use brass drift to install woodruff key (2) into keyway in
camshaft (1), being sure that arrow on key points in
same direction as when key was removed.
6.
Install camshaft gear (3) on camshaft (1) as follows:
a.
Check that keyway in crankshaft gear (3) is free of burrs or damage. Remove burrs with fine crocus cloth. If
damage or excessive burring is present, gear must be replaced.
b.
Measure gear (3) bore. The internal diameter must be between 1.7977 and 1.7985 inches (45.662 and
45.682 mm).
c.
Check that gear mounting area on camshaft (1) is free of burrs and worn spots. Remove burring and worn
spots with fine crocus cloth.
CAUTION
If area of worn spots are long enough to make a 0.125-inch (3.175 mm) wide band
around the camshaft, do not use the camshaft. Gear movement on camshaft may
result.
d.
Replace camshaft (1) if excessive damage is present.
e.
Measure camshaft in gear mounting area using micrometer. The outside diameter must be between
1.8005 and 1.8010 inches (45.733 and 45.745 mm).
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