Applier (4 I -A-329-500)
23). If the gap is less than 0.008 inch, remove the ring, and file with
a fine-cut file until the correct gap (0.008 to 0.013 inch) is obtained.
If end gap exceeds 0.013 inch, an oversize ring must be used. Repeat
the same procedure for all piston rings. Roll the new piston ring around
its particular groove in the piston. The ring should roll freely, and not
have a clearance of more than 0.003 inch (fig. 20). Repeat the same
procedure on each piston ring. Install the piston rings on the piston
with a piston ring applier (41-A-329-500) (fig. 24), making sure that
the beveled edge of both compression rings are towards the top.
11. CAMSHAFT ASSEMBLY.
a. Cleaning. Clean the camshaft, camshaft sprocket, camshaft
thrust washer, and camshaft thrust spring and plunger, in dry-cleaning
solvent.
b. Inspection and Repair.
A camshaft with excessively scored or
damaged cams, or with worn, corroded, scored, or discolored journals,
must be replaced. Inspect the camshaft oil pump drive gear. If the
teeth are worn, broken, or chipped, the camshaft must be replaced.
Measure the four camshaft journals (fig. 25), and record the readings.
If reading is less than 2.185 inches for the front journal, 2.122 inches
for the front intermediate journal, 2.0595 inches for the rear inter-
mediate journal, and 1.622 inches for the rear journal, the camshaft
must be replaced A camshaft gear with worn, broken, or chipped
teeth must be replaced. Small nicks can be honed, and then poiished
33
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