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CAMSH
EAR
GOVERNOR GEAR
TI
CF
G
ID
G
OIL PUMP
~ING
RKS
',ANI~
IAF'[
EAR
-ER
-'AR
GEAR
Fig. 26
IDLER GEAR
GEAR PULLI
BO
ALLEN HEAD SET S
lOCATED IN CRANK
Fig. 27
AR
VER
:REW
3ASE
side of the crankcase which locks the idler
shaft in
position.
With the use of a gear puller,
the idler shaft
and idler
gear
assembly
can be removed from the
crankcase. Sc~' Figl 27. In reassembly; allow .003"
to .004" clearance between idler gear and stud collar.
OIL PAN (Fig.
28)
The engine can now be inverted to that the supports and oil
pan can be removed. In reasserably; mount deep end ofoil
pan toward oil pump. Tighten mounting :screws, 8-11foot
pounds torque.
OIL PUMP (Fig.
29)
Remove locknut and driver gear from shaft.
If gear is
too tight
to remove by hand, use a puller;
hammering
on end of shaft to loosen gear will damage pump.
Take out slotted
pipe plug from bottom of crankcase.
By means of a 5/32 inch Allen wrench, remove lock*
screw from pipe plug hole. Withdraw oil pump from in-
side crankcase.
If pump fits
too tight
to remove by
hand, tap front of pump housing (not shaft),
with ham-
mer and brass rod.
Fig. 28
PIPE
PLlU~
~"
~CLEN HEAD
OIL
Fig. 29
PISTONS and CONNECTING RODS (Figs.
30, 31, 34)
By means of a 9/16" socket
wrench, loosen
and re~
move the hex locknuts
from connecting
rod bolts.
Then, by tapping
the ends of the bolts
lightly,
the
connecting rod cap will break free from the bolts.
Scrape off all carbon deposits that might interfere
with
removal of pistons
from upper end of cylinder.
Turn
crankshaft
until piston is at top, then push connecting
rod and piston
assembly upward and out thru top of
cylinder.
Be careful not to mar the crank pin by allow-
ing the rod bolts to strike
or scrape across it.
Place
caps on rods immediately so that they will not be mis-
matched in reassembly.
Be sure that
shims (used in
babbitt bearing rods), are in place before cap is put on.
NOTE: This model engine
was originally
furnished
with babbitt cast connecting rod bearings.
Shell bear-
ing rods are now being used for current
production
engines, and are interchangeable
with babbitt
bearing
rods for service
replacement.
Care should be taken in
reassembly
to mount bearings
properly.
The cap
should be assembled to the rod so that the locating
21
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Table of Contents
Troubleshooting
