TM 5-3810-307-24-2-2
Tappets and Push Rods - General Information
General Information
The camshaft has lobes to operate the intake and exhaust
valves and a special lobe to drive the lift pump. The valve
lobes contact the valve tappets which lift the push rods
subsequently opening the valves.
The tappets are mushroom shaped and are positioned so
the centerline of the tappet is offset to the centerline of the
cam lobe. The offset position causes the tappet to rotate as
it lifts the push rod.
The ball end of the push rod fits into the ball socket in the
tappet. The other end of the push rod has a ball socket in
which the ball end of the rocker lever adjusting screw
operates.