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 1-29.
HYDRAULIC SYSTEM. In the vehicle
1-32.
AIR CLEANER. The carburetor air
lift and tilt hydraulic system, oil is
cleaner is of the dry type, and is
drawn from the reservoir by the pump
mounted on the frame, to the manifold
which is mounted to the engine gear case
side of the engine. The purpose of the
cover.
air cleaner is to prolong engine life
The oil is forced through the
high pressure line to the control valve.
by preventing dirt and grit from being
When the lift and tilt control levers
drawn into the engine through the
are in the neutral position, oil flows
carburetor and intake manifold.
Air
through the valve and back to the reser-
enters the cleaner through an opening
voir.
When one of the control levers
in the cleaner outer shell, passes
is moved (forward or rearward), oil is
through the element and enters the
diverted through tubes and hoses to the
carburetor through a short "L" shaped
corresponding cylinder to extend or
rubber tube.
retract the piston. When the limit of
1-33.
ENGINE GOVERNOR. The engine is
this motion or stroke is reached,
the
oil pressure in the system builds up to
equipped with a centrifigual-type
approximately 2,000 PSI, forcing a plun-
governor for controlling excessive
ger in the relief valve section of the
speed of the engine.
The governor is
control valve to open and return ex-
driven from the camshaft timing gear.
cessive oil to the reservoir.
Governor setting is adjusted by means
The tilt
lock valve prevents the flow of oil to
of a spring on the governor control
and from the tilt cylinders when the
linkage. Tension of this spring is
hydraulic cylinders are not pressurized,
adjustable.
even though the tilt control valve
lever is depressed.
E N G I N E WATER PUMP. The impeller-
This prevents
1-34.
tilting of the upright mast when the
type water pump is bolted to the engine
engine is not running. Major parts of
block and is driven by V-type belt off
the hydraulic system are the oil reser-
The coolant fan
the crankshaft pulley.
voir that is built into the right hand
is bolted to the water pump pulley.
truck frame, the hydraulic pump that
operates off an idler gear of the crank-
shaft, the lift cylinder, two tilt
cylinders, a tilt lock valve, a lift
and tilt control valve. The valves are
controlled by mnaual levers.
1-30.
COMPONENT DESCRIPTION.
1-31.
FUEL PUMP. The fuel pump is
mounted to the engine cylinder block
on the left side.
This diaphragm pump
is actuated by an accertric lever that
operates against a cam on the engine
camshaft.
A fuel filter with a replace-
able element is installed on the inlet
side of the pump.
1-9
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