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3-18
Shaft valve rocker arm
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Inspect the shaft valve rocker arm for any
damage. Measure the outer diameter (OD) of
shaft valve rocker arm. If the OD is less than
the service limit, replace the shaft. (Fig. 3.60)
Outside micrometer
Service limit
8.000 ~ 7.991
Note:
The OD should be checked at the arm
complete valve rocker seating area.
Arm complete valve rocker
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The arm complete valve rocker has a roller
follower. The roller follower is a steel roller
housed with a needle bearing. This has been
provided to decrease the load exerted by the
valve train on engine by reducing the friction.
(Fig. 3.61)
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Inspect this roller for its free rotation and for
any physical damage on its surface. Found if
any replace the arm.
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There are needle bearings assembled on both
the side of the arm at shaft seating area.
Inspect these bearings for any abnormality.
Replace the arm if found any abnormality.
Caution:
Each needle bearing of arm complete valve
rocker has 20 needles in it. Ensure the
availability of all the needles before
reassembling the arm as the needles may
fall during removal of the arm from the
cylinder head assembly.
An additional care should be taken during
reassembly of the arm into the cylinder
head because the rollers may fall during
reassembly also.
Camshaft assembly
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Check the camshaft assembly for runout, wear
of cam lobes and journals. Any of these could
cause the engine to produce abnormal noise,
vibration or lack of power output.
Fig. 3.60
Fig. 3.61
TVS APACHE RTR 200
SERVICE MANUAL
SERVICING OF ENGINE