TM 5-3895-373-20
3.2.
ADJUST INTAKE AND EXHAUST VALVES - Continued.
B.
ADJUST - Continued.
b.
With the help of a second person, use the
radiator fan and rotate the engine until the valves
on the number #4 cylinder reach the "rocking"
position. A visual inspection of the valves in the
rocking position will indicate the period between
the opening of the intake valve and the closing of
the exhaust valve.
c.
With the number #4 cylinder valves in the
rocking position, adjustment to the number #1
cylinder can be performed. A visual inspection
of the number #1 cylinder valves will show both
the intake and exhaust valves at full extension.
d.
Holding adjustment screw (15) on the intake
valve with a flat blade screwdriver, loosen hex
nut (16).
e.
Turn the adjustment screw and measure with a
thickness gage until there is 0.010 in. (0,25 mm)
clearance between the top of valve stem guide
(17) and bottom of rocker arm (18).
f.
Hold adjustment screw (15) and tighten hex nut
(16).
g.
Repeat steps d, e, and f for the exhaust valve.
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