Fuel System Components
Illustration 22
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Typical example
(1) In-line fuel filter
(2) Electric fuel pump
(3) Primary fuel filter
(4) Secondary fuel filter (element type)
(5) Secondary fuel filter
Note:
The electric fuel pump is an option, engines
may have a mechanical fuel transfer pump installed.
i08625975
Product Description
The 403EA-11, 403EA-11T, 403EA-17, 404EA-22,
and 404EA-22T engines are indirect injection
engines. The engines are controlled with a
mechanically actuated fuel injection pump. The
engine cylinders are arranged in-line.
The cylinder head assembly has one inlet valve and
one exhaust valve for each cylinder. Each cylinder
valve has a single valve spring.
The pistons have two compression rings and an oil
control ring. It is important to ensure the correct
piston height so that the piston does not contact the
cylinder head. The correct piston height also ensures
efficient combustion of fuel that is necessary to
conform to requirements for emissions.
The crankshaft for a three cylinder engine has four
main bearing journals. The crankshaft for a four
cylinder engine has five main bearing journals. End
play is controlled by the thrust washers that are on
the rear main bearing.
The timing gears are stamped with timing marks to
ensure the correct assembly of the gears. When the
No. 1 piston is at top center compression stroke, the
teeth that are stamped on the crankshaft gear and
the camshaft gear will be in alignment with the idler
gear.
The crankshaft gear turns the idler gear which then
turns the camshaft gear and the gear for the engine
oil pump.
The fuel injection pump is mounted in the cylinder
block. The fuel injection pump is operated by lobes
on the camshaft. The fuel transfer pump is on the
right-hand side of the cylinder block. The fuel transfer
pump is also operated by lobes on the camshaft.
The fuel injection pump conforms to requirements for
emissions. If any adjustments to the fuel injection
pump timing and high idle are required, you must
refer to your Perkins distributor. Some fuel injection
pumps have mechanical governors that control the
engine rpm. Some fuel injection pumps have a
governor that is electrically controlled.
A gerotor oil pump is installed in the center of the
idler gear. The engine oil pump sends lubricating oil
to the main oil gallery through a pressure relief valve
and an engine oil filter. The rocker arms receive
pressurized oil through an externally located oil line
that runs from the main oil gallery to the cylinder
head.
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