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connecting Rod
The connecting rod is a high carbon steel forging, and the rod is of
I-section and the big end is of hor izontally split construction to
increase rigidity.
The piston pin is pressed into the small end of the rod.
The con-
necting rod bear ing is made of special copper alloy with back metal
and is flash-plated.
Timing Gears
All
the
timing
gears
are
spur
gears.
The
camshaft
gear
is
driven
by
the
crankshaft
gear
and
the
governor
gear
is dr i ven by
the camshaft gear.
Camshaft
The camshaft is a high carbon steel forging and is formed integral
wi th the cam for the injection pump, and the cam lobes and journals
are induction-hardened.
The camshaft is supported in machined holes in the crankcase.
The
front
journal is provided wi th an oil hole to supply oil intermi t-
tently to the cylinder head and rocker arms.
Camshaft thrust is received by the front side of the crankcase and by
a surface provided in the timing gear front cover.
The rear end of the camshaft is provided with a slot to drive the oil
pump.
Tappet and Push Rod
The
tappet
is
tubular
and
is
surface-
treated on the bottom surface and
the
rod
receIvIng
area.
The
tappet
is
installed offset from the cam center and
revolves as the cam rotates,
thus pre-
venting uneven wear of the bottom of the
tappet.
The push rod
is made of bar steel and
both ends are specially hardened.
45
Tappet
/C8mShaft
---1 -
Offset
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