REAR
BEARING PLATE
THIS SURFACE SHOULD BE
CLEANED
OF
ALL OLD
SEALING COMPOUND
BEFORE INSTALLING
SEAL
\
DRIVE
OR
PRESS
OIL
SEAL TO SHOULDER
OF
THE PLATE
BORE
MOUNTING FACE
/
OF
GEAR COVER
THIS
GEAR COVER SURFACE
SHOULD BE CLEANED OF ALL
OLD SEALING COMPOUND
BEFORE INSTALLING SEAL
GEAR
COVER OIL SEAL
REAR
BEARING PLATE
OIL SEAL
IS-1163
FIGURE
75.
GEAR COVER AND REAR BEARING
PLATE
OIL SEALS
OIL SEALS
The bearing plate must be removed to replace the oil
seal (Figure
75).
Drive the oil seal out from the inside.
3.
Install the rings on the pistonsstarting with theoil
control ring (Figure
76).
Usea piston ring spreader
to prevent twisting or excessive expansion
of
the
ring. Compression rings have a dot or the word
“top” on one side of the ring to indicate which
side faces the top of the piston. Unmarked piston
rings can be installed either way. The oil control
rinn has an expander; install the expander first
Before installing seals, fill the space between lips with a
multi-purpose grease. This will improve sealing.
and then close‘until the expander ends butt. The
joint should be
180
degrees from the gap
of
that
ring.
When installing the gear cover oil seal, tap the seal
inward until itis.645 inch (16.4 mm)from thefrontofthe
gear cover.
When installing the bearing plate oil seal, tap the seal
into the bearing plate bore to bottom against the
shoulder in the plate bore. Use a seal expander or place
a
piece of heavy paper around the end of the crankshaft,
when replacing the bearing plateto avoid damaging the
seal. Remove the paper as soon as the plate is in place.
Engines equipped with some types of reduction gear
assemblies do not use the rear oil seal. The reduction
gear assembly is oiled directly from the engine
crankcase. Refer to the instructions screened on the
case of the reduction gear assembly.
PISTON
ASSEMBLY
1.
Lubricate all parts with engine oil.
2.
Position piston on its respective rod and install
the pin.
HEAVIEST
COMPRESSION
RING
IN
TOP.
GROOVE
COMPRESSION
RINGS
OIL
CONTROL
RING
FIGURE
76.
PISTON RINGS
53
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