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TM 5-2420-222-34
3-12.
VALVE MAINTENANCE (Con’t).
c.
REPAIR
NOTE
Follow valve grinding equipment manufacturer’s
instructions for proper use of equipment when
refacing valve.
Using valve face grinding machine, reface valve (6).
Valve face must be ground to an angle of 43° 15'-43°
45' (0.757-0.766 rad).
d.
INSTALLATION
1.
Lubricate valve stem with engine oil. Slide valve (6)
in cylinder head (1) and hold in position. Ensure that
valve stem slides up and down in valve guide without
resistance.
2.
Position valve spring (2) and valve lock (4) in place
on valve (6) and cylinder head (1).
3.
Using valve spring lifter, compress valve spring (2).
Install exhaust valve cap (3) on valve (6), then
remove valve spring lifter.
4.
Install valve seat (5) on top of valve (6). Using
plastic-faced hammer, tap on valve three or four
times to seat valve lock (4).
FOLLOW-ON TASKS:
•
Install cylinder head (see paragraph 3-6).
•
Install rocker arm, shaft, and pushrods (see paragraph 3-13.)
3-80
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