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 TM 55-1905-221-14-3
6-23.3.
CAMSHAFT AND BALANCE SHAFT - MAINTENANCE INSTRUCTIONS.
(Continued).
LOCATION/ITEM
ACTION
REMARKS
b. Lubrication.
(1)
Lubricating oil is supplied under pressure to the bearings from the longitudinal main gallery through a
horizontal transverse passage at each end of the cylinder block, then up the connecting vertical passages
in each corner of the block to the cam and balance shaft end bearings. The camshaft intermediate
bearings are lubricated by the oil from the end bearings passing through the drilled passage in the shaft.
(2)
The lower halves of the camshaft intermediate bearings are grooved along the horizontal surface that
mates with the upper halves of the bearings. Oil from the passage in the camshaft is forced through the
milled slots in the bearing and then out the grooves to furnish additional oil to the cam follower assemblies.
This permits the cam pocket to be filled rapidly to the operating oil level immediately after starting the
engine.
6-333
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