TM 5-4930-244-14
n.
Intake Exhaust Valves and Decompression Lever Adjustment.
(1)
Removal. (Refer to Figure 5-24).
(a)
Remove two screws (1), cover (2), and gasket (3) from cylinder head(4).
(b)
Clean excess gasket material (3) off of cylinder head (4) and cover (2).
(2)
Adjustment.
NOTE
Decompression lever (5) must be fully released prior to adjustment
(a)
Turn crankshaft pulley (6) clockwise until valves (7, 8) are in closed position.
(b)
Loosen locking nut (9) on rocker arm (10)
(c)
Place 0.004-inch thickness gage between stem of valve (7) and arm (10).
(d)
Turn adjusting screw (11) while moving gage between stem of valve (7) and arm (10) until a slight
drag is felt
(e)
Hold screw (11) in place and tighten nut (9).
(f)
Repeat steps b thru e for valve (8)
(g)
Turn pulley (6) clockwise until valves (7, 8) are in closed position.
(h)
With lever (5) in vertical position, turn spindle slot (12) clockwise until spindle (13) is backed off from
arm (10).
(i)
With lever (5) still in vertical position, turn slot (12) counterclockwise until valve stem (14) and arm
(10) make contact.
(3)
Installation.
Install two screws (1), cover (2) and new gasket (3) onto cylinder head (4).
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