Lubrication System; Electrical System - Perkins 1204F-E44TA Systems Operation Testing And Adjusting

UENR4490-01
The coolant then flows into the housing of the water
temperature regulator (2). If the water temperature
regulator (2) is closed, the coolant goes directly
through a bypass (3) to the inlet side of the water
pump. If the water temperature regulator is open, and
the bypass is closed then the coolant flows to the top
of the radiator (1).

Lubrication System

Lubricating oil from the oil pan flows through a
strainer and a pipe to the suction side of the engine
oil pump. Engine oil pressure for the lubrication
system is supplied by the oil pump. The crankshaft
gear drives a lower idler gear. The lower idler gear
drives the oil pump gear.
The pump has an inner rotor and an outer rotor. The
axis of the inner rotor is off-center to the outer rotor.
There is an interference fit between the inner rotor
and the drive shaft.
If a balancer is installed, the engine oil pressure is
provided by an integrated engine oil pump. The
integrated engine oil pump is located in the balancer.
The inner rotor has six lobes which mesh with the
seven lobes of the outer rotor. When the pump
rotates, the distance increases between the lobes of
the outer rotor and the lobes of the inner rotor in
order to create suction. When the distance decreases
between the lobes, pressure is created, forcing oil
into the lubricating system.
The lubricating oil flows from the outlet side of the oil
pump through a passage to the plate type oil cooler.
The oil cooler is located on the left side of the cylinder
block. The oil then flows from the oil cooler through a
passage to the oil filter head.
Under normal conditions, the oil then flows from the
oil filter head to the oil filter. The oil may flow through
a bypass valve that permits the lubrication system to
function if the oil filter becomes blocked.
The oil flows from the oil filter through a passage that
is drilled across the cylinder block to the oil gallery.
The oil gallery is drilled through the total length of the
left side of the cylinder block. If the oil filter is on the
right side of the engine, the oil flows through a
passage that is drilled across the cylinder block to the
pressure gallery.
Lubricating oil from the oil gallery flows through high-
pressure passages to the main bearings of the
crankshaft. Then, the oil flows through the passages
in the crankshaft to the connecting rod bearing
journals. The pistons and the cylinder bores are
lubricated by the splash of oil and the oil mist.
This document has been printed from SPI2. NOT FOR RESALE
Engines have piston cooling jets that are supplied
with oil from the oil gallery. The piston cooling jets
spray lubricating oil on the underside of the pistons in
order to cool the pistons.
Lubricating oil from the main bearings flows through
passages in the cylinder block to the journals of the
camshaft. Then, the oil flows from the front journal of
the camshaft at a reduced pressure to the cylinder
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head. The oil then flows through the center of the
rocker shaft to the rocker arm levers. The valve
stems, the valve springs and the valve lifters are
lubricated by the splash and the oil mist.
The hub of the idler gear is lubricated by oil from the
oil gallery. The timing gears are lubricated by the
splash from the oil.
Lubricating oil from the oil filter flows through a
passage in the cylinder block to an external feed
connection for the turbocharger. The feed connection
supplies lubricating oil to the center housing of the
turbocharger. Lubricating oil then flows from the drain
for the turbocharger to the engine crankcase.

Electrical System

The electrical system is a negative ground system.
The charging circuit operates when the engine is
running. The alternator in the charging circuit
produces direct current for the electrical system.
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Engine Operation
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