Technical data

7. Camshaft and Timing Gear
The camshaft is a high carbon steel forging. The
cam surface and journals are
induction-hardened to improve wear
resistance. The shaft is supported on
three bearings. Each journal is supported
in a bore made in the cylinder block and
is lubricated by a forced lubrication
system. A camshaft journal has a slot to
intermittently lubricate the rocker arms
through the cylinder head.
Further, the shaft has an oil escape hole at the
rear end to let excess oil return to the oil
pan.
Timing gears are helical gears which have been finished by shaving and crowning to provide a
greater durability and to reduce gear noise.
The valve timing is as shown in the specification section.
8. Lubricating Oil Pump Gear
The lubricating oil pump gear is mounted on the left side of the engine's front gear case. This
also serves as the drive gear for the injection pump camshaft. When the oil pump is
mounted, it is driven by the rotation of the injection pump cam by means of an Oldham's
coupling.
9. Tappet and Push Rod
The tappet is a tubular tappet which has .been
chill-hardened at the bottom and gas-carburized
at low temperature over the entire surface to
provide a great wear resistance. The tappet is
offset from the cam center to prevent uneven
wear of the tappet bottom.
The push rod is produced from bar steel; both ends of the
rod are flame hardened.
10. Fuel Injection Pump Cam
The pump camshaft is produced from high carbon steel. Its cam surfaces are induction-hardened
to provide great wear resistance.
The front end of the shaft supported on a ball bearing is connected with the governor shaft. The
rear end is provided with an Oldham's coupling groove for connecting with the oil pump
drive shaft.
11. Oil Pan
The oil pan is made of steel and is equipped with a drain hose assembly attached where normally
the oil drain plug would be found.