-------------CHAPTER1
LUBRICATION SYSTEM
Engine
Oil
Flow
-
Engine Lubrication System With Turbocharger Fitted
Lubrication of the engine, Figure 1, is main-
tained
by
a rotor type oil pump mounted in the
rear of the engine block, forward
of
the fly-
wheel on the left hand side of the engine. The
oil pump is driven from the rear of the cam-
shaft and draws oil from the engine oil pan
through a tube and screen assembly.
A spring loaded relief valve is integral with the
oil filter body mounted on the left hand side
of
the engine block and prevents over pres-
surisation of the system.
The
spin on type oil filter mounted externally
to its support housing on the left hand side of
the engine, allows easy access at service in-
tervals. Oil flows from the filter to the main oil
gallery which runs the length of the cylind
er
block, which also intersects the camshaft fol-
lower chamber.
The main gallery also supplies oil to the
crankshaft main bearings, connecting rods,
big ends and small ends. The underside of
the pistons and pins, are lubricated by oil
pressure jets mounted adjacent to each main
journal housing.
The
camshaft drive
gear
bushing is pressure
lubricated through a drilled passage from the
front main bearing. The gear has small oil
passages machined on both sides allowing
excess oil to escape.
3
Timing gears are lubricated
by
splashed oil
from the cam follower chamber and the pres-
sure lubricated camshaft drive
gear
bushing.
On 4 cylinder engines the dynamic balancer
is lubricated, through a drilled passage, from
the cylinder block crankshaft thrust bearing
web to the balancer housing. Oil flows
through the balancer housing to the drilled
balancer
gear
shafts and onto the bushings in
the balancer gears.
An intermittent flow of oil is directed to the
valve rocker arm shaft assembly via a drilled
passage in the cylinder block. This is located
vertically above above
No.1
camshaft bear-
ing and aligns to a hole in the cylinder head.
The rotation of the camshaft allows a con-
trolled intermediate flow of lubrication.
The turbocharger where fitted, is supplied
with oil from the oil filter support housing
mounted on the left hand side
of
the engine.
DIESEL ENGINE STRIPDOWN
In
the following procedures and illustrations
the engine
in
the main is shown removed
from the tractor.
However, there are certain operations that
can
be
performed with the engine still in the
tractor,
or
separated at the connection to the
front axle support, or separated from the
transmission housing.
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