F i g u r e 11B-152. Removing Camshaft
with Puller
F i g u r e 11B-153. Removing Camshaft
Gear
C. Punch a hole as deeply as possible
with a center punch, to aid in break-
gallery to remove any foreign material or
ing through the hardened surface of
sludge. Clean the exterior of the cam-
the plug.
shaft and blow out the gallery and the oil
holes with compressed air. Clean the
D. Then, drill a hole straight through
gears, camshaft bearings and related
the center of the plug with a 1/4"
parts with fuel oil and dry them with
d r i l l (carboloy tip).
compressed air.
E. Use the 1/4" drilled hole as a guide
Inspect the cams and journals for wear
and r e - d r i l l t h e plug with a 5/16"
o r s c o r i n g . If the cams are scored, in-
d r i l l (carboloy tip):
s p e c t t h e c a m f o l l o w e r s . Also inspect
the camshaft keyways and threads for
F. Tap the drilled hole with a 3/8"-16
damage.
tap.
If there is a doubt as to the acceptability
G. Thread the 3/8"-16 adaptor J 6471-2
of the camshaft for further service de-
into t h e p l u g .
Then attach slide
termine the extent of cam lobe wear as
hammer J 2619-5 to the adaptor. Re-
follows:
move the plug by s t r i k i n g the weight
against the handle.
NOTE
H. Insert a 0.375" diameter steel rod into
The camshaft can be in or out of
the camshaft oil gallery and drive the
the engine during this inspection.
remaining plug out.
NOTE
1. With a tapered leaf set of feeler gaug-
es (0.0015" - 0.0100") and a piece of
If a steel rod is not available, re-
square h a r d m a t e r i a l 1 / 8 " x 3 / 8 " x 1 "
move the remaining plugs as out-
measure the flat on the injector rise side
lined in steps A through G.
of the cam lobes (see Figure 11B-154 on
2. If the flats measure less than 0.003"
in depth and there are no other defects
Inspection
the camshaft is satisfactory for service.
Soak the camshaft in clean fuel oil.
then, run a wire brush through the oil
Engine (Less Major Assemblies)