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 TM 55-1905-219-14-6
3-165.1. VALVE AND INJECTORMECHANISM - MAINTENANCE INSTRUCTIONS
(Continued).
LOCATION
ITEM
ACTION
REMARKS
CLEANING AND INSPECTION
Wear protective eye goggles when using compressed air.
4.
Rocker
a. Wash the rocker arms, shaft, brackets
shaft
and bolts with clean fuel oil. Use
assembly
a small wire to clean out drilled oil
passages in the rocker arms and rocker
shaft bolts. Dry the parts pith compressed
air.
b. Inspect the rocker arm shaft and rocker
arm bushings. A maximum shaft bush-
ing clearances of .004 inch (0.010 cm)
is allowable with used parts. Service
replacement bushings must be reamed
to size after installation.
c. Inspect the rocker arms for galling
or wear on the pallets (valve of injec-
tor contact surfaces). If worn, the sur-
face may be refaced up to a maxi-
mum of .010 inch (0.025 cm).
However, proceed with caution when
surface grinding to avoid overheating
the rocker arm. Maintain the radius
and finish as close to the original sur-
face as possible. Inspect the valve
bridges for wear.
5.
Cam
a. Proper inspection and service
follower
of the cam follower is very
necessary to obtain continued
efficient engine performance.
When any appreciable change in
injector timing or exhaust valve
clearance occurs during engine
operation, remove the cam
3-2776
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