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- - - - - - - - - - - - - C H A P T E R 1
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
cylinder
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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