TM 5-3810-300-24&P-3
1.7.2 CAMSHAFT, BALANCE SHAFT AND BEARINGS
b. To aid in breaking through the hardened surface
of the plug, punch a hole as deep as possible
with a center punch.
c. Use a " carboloy tip drill and drill a hole straight
through the center of the plug. then, enlarge the
hole with a 5/16" carboloy tip drill.
d. Tap the drilled hole with a 3/8"-16 tap.
e. Thread the 3/8"-16 adaptor J 6471-2 into the
plug and attach the slide hammer J 6471-1 to
the adaptor. Remove the plug by striking the
weight of the hammer against the handle.
f. Insert a 3/8" diameter steel rod into the camshaft
oil passage and drive the remain-ing plug out.
Fig. 6 - Removing Gear (Camshaft or Balance Shaft
Gear Puller J 1902-01)
Inspection
NOTE: Do not remove the puller or adaptor
Clean the camshaft, balance shaft and related parts with
plate until the camshaft is reinstalled. The
fuel oil. All foreign matter must be removed from the
adaptor plate, se-cured to both the flywheel
camshaft oil passage. Dry all parts with compressed air.
housing and the camshaft gear will hold the
gear (thrust washer also on "A" and "D"
Examine the cams and journals. If the surfaces are
engines) securely in place and in alignment
badly scored or worn replace the camshaft or balance
which will aid in the reinstallation of the
shaft.
camshaft.
Check the runout at the center bearing with the camshaft
13. Remove the front bearing from the camshaft and pull
mounted on the end bearing surface. Runout should not
out the inner thrust washer ("B" or "C" engines).
exceed .002".
Then, pull the -camshaft and intermediate bearings
from the cylinder block.
Check the cam followers if the cam surfaces are scored.
Disassemble Camshaft or Balance Shaft
Inspect both faces of each thrust washer. Replace
excessively scored or worn washers.
New thrust
1. Remove the gear from the shaft.
washers are available in standard (.120" to .122" thick)
and oversize (.005" or .010"). The clearance between
2. Slide the rear bearing (and the thrust washer on the
the thrust washer and the thrust shoulder of the shafts is
"A" and "D" engines) off of the shaft.
.004" to .012" with new parts, or a maximum of .018 with
3. Remove the lock rings from the camshaft
used parts.
intermediate bearings and free the two halves of
each bearing.
When the thrust surfaces of a camshaft or balance shaft
are ground undersize, special care must be taken-as
4. To facilitate removal of any foreign matter lodged
follows:
behind the camshaft oil passage end plugs, remove
the plugs as follows:
1. Leave a 1/32" to 3/32" radius between the bearing
surface of the thrust collar shoulder and the bearing
a. With the camshaft clamped in a vise, make an
surface of the camshaft.
indentation in the center of one of the end plugs
with a 31/64" carboloy tip drill.
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