TM 4320-1 4/1
Install valve spring (refer to 4, Figure 5-2)
Install retainer (refer to 5, Figure 52) and retainer keeper (refer to 6, Figure 52)
Ensure push rods have cup on top end to hold lubrication for valve ad-
justing screw engagement. (Some early engines have straight rods.)
Replace both push rods and adjusting screws with new, if cups are not
on the push rods.
Install push rods (with cup on top) into tappets.
Install rocker arm support (refer to 7, Figure 52) with intake and exhaust valve rocker arms (refer to 10
and 13, Figure 52) attached.
Tighten rocker arm support bolt (refer to 15, Figure 5-2) with torque wrench to 14-16 ft-lb (200-220 kg-
Adjust valve clearance as per ADJUSTMENT procedure in paragraph 322.