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TM 5-4320-308-13
3-30. ADJUST CYLINDER HEAD AND VALVE ASSEMBLY (Continued)
c.
Check clearance between rocker and
valve stem with a feeler gage. Tappet
clearance cold should be 0. 004 inch (0.
10 mm). To correct clearance loosen nut
(2).
d.
Adjust screw (3) with screwdriver until
feeler gage can be pulled between rocker
and valve stem with very slight resistance
after nut (2) has been tightened.
6
The adjustment of decompression adjustment
screw is required if the engine does not
decompress when the decompression lever is in
position 1.
a.
Crank engine in same direction as for
adjusting tappet clearance (see step 5b).
b.
Put decompression lever (1) in position 1.
c.
Loosen nut (2) using special 10 mm box
wrench and turn adjustment screw (3)
clockwise until rocker touches valve stem.
d.
Turn adjustment screw (3) another half
turn and secure by tightening nut (2).
3-70
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