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TM 5-4320-308-13
4-17.
INSPECT/REPLACE CYLINDER HEAD AND VALVE ASSEMBLY (Continued)
c. Loosen nut (2) using box wrench 618 306 00 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)
11. Check clearance of complete pushrod (1) and pinion (2).
a. Use a feeler gage 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)
NOTE
During engine operation decompression shaft must not move. Assured
clearances will prevent movement.
4-47
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