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Lubrication System
DETROIT DIESEL 53
Excess oil returns to the crankcase via drain holes in the
Oil for lubricating the connecting rod bearings, piston
blower end plates which lead to corresponding drain
pins, and for cooling the piston head is provided through
holes in governor housing (6V engine).
the drilled crankshaft from the adjacent forward main
bearings. The gear train is lubricated by the overflow of
The blower drive gear hub in a 6V engine is pressure
oil from the camshaft pocket through a communicating
lubricated through a connecting passage from the rear
passage into the flywheel housing. Some oil spills into
blower end plate, through the governor housing and into
the flywheel housing from the bearings of the
the blower and governor drive support.
camshafts, idler gears and accessory drive gears.
Four tapped oil pressure take-off holes (three at the rear
Drilled oil passages on the camshaft side of the cylinder
and one at the front) are provided in a 6V cylinder block.
head (Fig . 1) are supplied with oil 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 drilled bolts and
lubricates the rocker arm bearings and push rod clevis
bearings.
Excess oil from the rocker arms lubricates the lower
ends of the push rods and cam followers, then drains to
cam pockets in the top of the cylinder block, from which
the cams are lubricated. When these pockets are filled,
the oil overflows through holes at each end of the
cylinder block and then through the flywheel housing
and front cover to the crankcase.
Cleaning lubrication System Thorough flushing of the
lubrication system is required at times.
Should the
The blower bearings are pressure lubricated by oil from
engine lubrication system become contaminated by
drilled passages in the cylinder block which connect
ethylene glycol antifreeze solution or other soluble
matching passages in the blower end plates which, *
material.
refer to Section 5 for the recommended
turn, lead to the bearings. Lubricating oil is supplied
cleaning procedure.
directly to the front and rear right bank camshaft end
bearings and supplies oil to the blower bearings.
1972 General Motors Corp.
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