A Series Diesel Engine Base Engine Components 151
The camshaft has lobes to operate the intake and
exhaust valves.
The valve lobes contact “mushroom” shaped valve
tappets which operate the push rods.
The profile of the cam lobes is the same for all A
series engines.
The tappets are mushroom shaped. The convex
shape of the surface which contacts the camshaft lobe
causes the tappet to rotate as it lifts the push rod.
The ball end of the push rod fits into a ball socket in
the tappet.
The other end of the push rod is fitted with a socket
into which the ball end of the rocker lever adjusting
screw operates.
Flywheel Housing and Flywheel
Several Optional flywheel housing and flywheels are
used depending on the application.
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