Figure 1-9. Engine Lubricating System Components
The engines main bearings and valve train are lubricated by pressurized oil directly from the main oil rifle
(Figure 1-10). Other power components, connecting rods, pistons, and camshaft receive pressurized oil indirectly from the
main oil rifle.
Drillings in the crankshaft supply oil to the connecting rod bearings. Oil is supplied to the camshaft journals
through drillings in the main bearing saddle. Smaller drillings in the main bearing saddle supply oil to the piston cooling
nozzles. The spray from the nozzles also provides lubrication for the piston pins.
Lubrication for the valve train is supplied through separate drillings in the cylinder block. Oil flows through the
drillings and across the oil transfer slot in the cylinder head gasket. From the transfer slot, the oil flows around the outsi de
diameter at the cylinder head capscrew, across a slot in the bottom of the rocker lever support, and up a vertical drilling in
the support. From these drillings, oil flows through drillings in the rocker lever shaft to lubricate the rocker levers. Oil flows
through a drilling in the rocker levers to fill a channel cast into the top of the levers. The oil from the channel lubricates the
valve stems, push rods and tappets.
Transmission. The forklift transmission (Figure 1-11) is driven directly by the engine. It multiplies the power
from the engine and, through internal clutches and gears, provides power to drive the wheels.
Operation of the transmission is controlled by a Speed Range and Direction Selector mounted in the drivers
compartment. The selector allows the operator to choose travel in either the forward of reverse direction. Three speeds
are available in each direction.