4 lubrication System
DETROIT DIESEL 53
the blower bearings received lubrication indirectly via
Oil lubricating the connecting rod bearings. piston
the right rear camshaft end bearing only. Excess oil
pins. and for cooling the piston head is provided
returns to the crankcase via drain holes in the blower
through the drilled crankshaft from the adjacent
end plates which lead to corresponding drain holes in
forward main bearings. The gear train is lubricated by
the cylinder block (In-line engines),
the overflow of oil from the camshaft pocket through a
communicating passage into the flywheel housing.
some oil spills into the flywheel housing from the
bearings of the camshafts. balance shaft (In-line
engine),
Drilled oil passages on the camshaft side of the
are supplied with oil
cylinder head (Fig 1
from the bores located at each end of the cylinder
block. Oil from these drilled passages enters the
drilled rocker shaft brackets at the lower ends of the
One tapped oil pressure take-off hole is provided in
drilled bolts and lubricates the rocker arm bearings
the lower engine front cover on some In-line engines.
and push rod clevis bearings.
Excess oil from the rocker arms lubricates the lower
In addition. tapped oil holes in the cylinder block. on
ends of the push rods and cam followers. then drains
the side opposite the blower. are also provided as
follows:
to cam pockets in the top of the cylinder block, from
which the cams are lubricated. When these pockets are
three holes when the
tilled. the oil overflows through holes at each end of
the cylinder block and then through the flywheel
blower is on the right side of the engine.
housing and front cover to the crankcase.
The blower bearings are pressure lubricated by oil
Cleaning lubrication System
from drilled passages in the cylinder block which
Thorough flushing of the lubrication system is
connect matching passages in the blower end plates
required at times. Should the engine lubrication
which, in turn, lead 10 the bearings. On current
engines. lubricating oil is supplied directly to the front
system become contaminated by ethylene glycol
and rear right bank camshaft end bearings and
antifreeze solution or other soluble material. refer to
Section 5 for the recommended cleaning procedure
supplies oil to the blower bearings. On former engines.
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