TM 10-4320-310-14
5-10.
INSPECT/REPLACE CYLINDER HEAD AND VALVE ASSEMBLY (Continued)
c.
Loosen nut (2) and turn adjustment screw (1)
clockwise until rocker touches valve stem.
d.
Turn adjustment screw (1) another half turn and
secure by tightening nut (2).
12
Adjust tappet clearance (para 4-22).
13
If decompression lever does not ratchet, check
clearance of complete pushrod (1) and pinion (2).
a.
Use feeler gauge to check that clearance (3)
between socket of complete pushrod (1) and
pinion (2) is 0.039 inch (1.0 mm).
b.
Check that clearance (4) is 0.039 inch (1.0 mm).
c.
Clearances can be adjusted by adjusting
complete pushrod (1) for clearance (3), and
adjusting rocker shaft for clearance (4). To
adjust complete pushrod, loosen lower locking
nut on pushrod, turn upper adjusting nut on
pushrod to achieve adjustment and tighten
lower locking nut to maintain proper adjustment.
Note
During engine operation, decompression shaft
must not move. Assured clearance will
prevent movement.
5-24
