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E N G I N E 6 C Y L I N D E R
19
STARTER RING GEAR
With the exception of the flywheel, as used
with the automatic transmission, which is a
steel stamping, the starter ring gear can be
replaced by placing the flywheel in an arbor
press with steel blocks equally spaced around
the gear and pressing the flywheel through,
or the ring gear can be broken with a chisel.
To install the new starter ring gear, first
heat it to expand the inside diameter so that
it can be pressed over the flywheel.
SHAFT PILOT BEARING
The pilot bearing for the shaft is located
at the center of the rear end of the
crankshaft. This is an oil impregnated bronze
bearing. It is pressed into the end of the
crankshaft. This bearing does not require any
lubrication after assembly. When assembled
in service, it is advisable to place a small
amount of high melting point grease on the
end of the shaft as it is installed into the
bearing. Bearings being installed must be of
the correct size for the series and type of
transmission.
LUBRICATION SYSTEM
The lubrication system is of the full
pressure type with all vital moving parts
receiving lubrication under pressure except
the piston pins.
"Hornet" and "Wasp" Series
The pressure is supplied by a positive
displacement rotor type oil pump mounted on
the right lower side of cylinder block and
driven from a gear cut on the camshaft.
The oil is drawn through the floating oil
intake screen (Fig. 48) to the intake side
of the oil pump.
1. Swivel Connectlon
2. Intake Screen
3. Drain Plug Outlet
FIGURE 48—
Oil Intake Screen Assembly
"Hornet" and "Wasp" Series
Oil under pressure passes the plunger of
the oil relief valve assembly and fills the
main horizontal oil gallery from which it is
directed through drilled passages to lubri-
cate the camshaft bearings, tappet assembly,
main and connecting rod bearings, cylinder
walls, and timing assembly.
Piston pins are lubricated by oil "throw-
off" from rotating parts and wiping action
of piston rings.
Before removing the oil pump, position the
engine crankshaft so that No. 1 cylinder
piston is at T.D.C. exhaust stroke and No. 6
cylinder piston is at T.D.C. on compression
stroke.
Upon disassembly of the oil pump, remove
the oil pump cover and use a brass drift to
mark an indexing point of one lobe and notch
on rotor and internal gear or outer rotor to
insure relationship for reassembly.
Measure the clearance between a lobe and
notch opposite the reference mark. This
clearance should be .010" or less. If more
than .010", replace both rotors and shaft.
Place a straight edge across the pump body
between the screw holes. Use a feeler gauge
to measure the clearance between the top of
the rotors and the straight edge. This
clearance should be .004" or less. If the
clearance is greater than this limit, the
pump body must be replaced.
With the outer rotor pressed against one
side of the pump body, measure the clearance
between this rotor and the body on the
opposite side. If this clearance is more than
.008", replace the pump body.
The pump cover plate must be smooth and
not worn from the rotors. Place a straight
edge across the cover. If a .002" feeler can
be inserted between the cover and the
straight edge, the cover is worn and must be
replaced.
1. Oil Pump Drive Gear Pin
2. Oil Pump Drive Gear
3. Oil Pump Body
4. Oil Pump Shaft
5. Oil Pump Inner Rotor
6. Inner Oil Pump Rotor Lobe
7. Outer Oil Pump Rotor
8. Oil Pump Cover Gasket
9. Oil Pump Cover
10. Oil Pump Cover Screws
FIGURE 49—
Oil Pump Assembly "Hornet"
and "Wasp" Series.
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