Section II. FUEL SYSTEM MAINTENANCE
FUEL SYSTEM COMPONENTS
(Sheet 1 of 2)
FUEL TANK. Located next to the cab on the left side of the
Electrically operated solenoid
vehicle. The capacity of the tank is 165 gal. (625 liters). The tank has a drain
fastened to the fuel injector pump. Depressing the ENGINE STOP switch in
valve at the bottom and a filler screen and cap at the top. Fuel
the operator's compartment electrically activates the solenoid restricting the
monitored with two indicator lights in the operator's compartment.
fuel passage and stops the engine.
FUEL LINES. Carry fuel from the tank to various components of the
INJECTION PUMP. A camshaft gear driven pump which provides
fuel system and provide return routes for unused fuel.
each injection nozzle with a metered amount of high pressured fuel at a
precise time. Located on top of the engine, the pump housing has a V shape
PRIMARY FUEL FILTER. Filters all fuel from the fuel tank before it
with four pumps on each side.
enters the fuel transfer pump. The filter may be disassembled and the
element can be cleaned. The fuel filter is found behind the access door
AUTOMATIC TIMING ADVANCE. A system of weights, springs and
behind the operator's compartment.
slides built into the gear which drives the fuel injection pump. Centrifical force
changing the location of these movable parts, also advances or retards the
PRIMING PUMP. A hand operated pump located in the primary fuel
gear position. Since this gear drives the pump the fuel injection timing is also
filter base. It is used to eliminate air in the fuel system. After a fuel system
advanced or retarded.
component has been replaced it will be necessary to pump the air from the
INJECTION NOZZLES. The high pressured fuel from the injection
pump is sent through the injection nozzle. The nozzle changes the fuel to the
TRANSFER PUMP. Draws fuel from the fuel tank through the
correct characteristic (spray pattern) for good combustion. One is located in
primary fuel filter, then pumps fuel through the secondary fuel filter into the
fuel injector pump.
The pump is gear driven and located on top of the
GOVERNOR. Located above the fuel injection pump the governor is
controlled by the accelerator pedal. Centrifical force changes the position of
SECONDARY FUEL FILTER. Located under the left access panel,
a set of weights. Depending on the position of the accelerator pedal and the
this is the final filter before the fuel reaches the injector pump.
It is to be
load of the engine these weights will change the supply of fuel to the engine.
thrown away and replaced when necessary.
ETHER STARTING AID. Delivers a measured amount of ether into
FUEL PRESSURE GAGE. A gage in the operator's compartment
the turbocharger outlet for ease in cold weather starting. The ether is stored
which monitors the fuel pressure on the output side of the secondary fuel
under pressure in a cylinder and the amount to be sprayed into the outlet is
controlled by a valve electrically activated from the instrument panel.
Go on to Sheet 2