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TM 10-3930-638-24&P
3-5. ENGINE MAINTENANCE (cont)
a. Engine Tune-up (cont).
(2) Valve Tappet Clearance Adjustment (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
TAPPET ADJUSTMENT — COLD SETTING
1
b. Rocker arm adjusting
Adjust
Repeat step a above to adjust intake and
cont)
screws
exhaust valves as pointed out by arrows
below
c. Engine flywheel
Rotate clockwise Rotate engine one complete revolution
until pointer in timing hole is in line with
TDC mark on flywheel (TDC position
for No. 4 cylinder)
d. Rocker arm adjusting
Adjust
Repeat step a above to adjust intake and
screws
exhaust valves as pointed out by the
arrows below
e. Valve stems
Lubricate
Squirt oil through valve springs to lubr-
icate stems before starting engine
3-30
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