IHI NIIGATA MG(L)26HLX, Инструкция по эксплуатации

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SECTION
４
- DISASSEMBLY AND REASSEMBLY
4.1 CYLINDER HEAD AND VALVE MECHANISM
４－１－０７
4.1.10 Valve Push Rods and Tappets
CAUTION
There is a danger of your hands being pinched by the gear and cam roller of
the engine.
Never insert your hands in the course of turning.
A visual inspection of the camshaft and cam rollers can be made by removing
the camshaft inspection covers. if any damage is visible, disassemble the
parts as follows:
Remove the rocker arm support
①
and rocker arms. Remove the push rods
②
.
Loosen the bolts
③
that secure the tappet arm shaft
⑤
and remove the
tappet arms and shaft.
Any bent push rods should be replaced and a careful check should be made to
determine the cause of the bending. Likely cause are engine overspeeding,
a valve seizure, or a frozen rocker arm.
Inspect the ends of the push rods for damage - light pitting is normal and
will not affect operation.
The tappet rollers and roller bushings should be measured and replaced if
clearances exceed the maximum values shown in the Clearance and Wear Table.
The rollers should be replaced if any pitting is apparent on the camshaft
contact surface.