CRANKSHAFTS & CAM GEARS
Auxiliary Drive
Cam gear end play is checked in the same manner as
crankshaft end play.
Cam shaft end play must be .002" (.05 mm) to .008" (.20
mm). If end play is less than .002" (.05 mm), add service
shims (#270516-.009" (.23 mm); #270517-.007" (.18
mm); or #270518-.005" (.13 mm) to obtain proper end
play. If end play is more than .008" (.20 mm), use
service bearing assembly kit #299706, which includes
above shims to obtain proper end play.
Use chalk or crayon to mark the top of crankshaft gear
tooth, whose inner end is directly in line with the notch of
the timing mark. See Fig. 25.
Fig. 25. Aligning Timing Marks
Align timing marks on crankshaft and cam gear, and
install crankshaft. Install crankshaft carefully so crankpin
is not damaged.
Install power take-off and
magneto
side
bearing
supports. Torque power take-off support screws to 185
inch-pounds (2.2 mkp, 20.9 Nm). Torque magneto side
support screw to 85 inch-pounds (1.0 mkp, 9.6 Nm).
See Fig. 26.
Fig. 26. Installing Bearing Supports
See Section 12 for timing of synchro-balance timing
gears.
CHECKING AND CORRECTING
CRANKSHAFT END PLAY
Crankshaft end play tolerance is machined at the factory
and normally requires no adjustment, unless the bearing
supports or crankshaft is replaced.
Crankshaft end play must be .002" (.05 mm) to .008" (.20
mm). If end play is less than .002" (.05 mm), add service
shims (#270513-.015" (.38 mm); #270514-.010" (.25
mm); or #270515-.005" (.13 mm) to obtain proper end
play. If end play is more than .008" (.20 mm), use
service bearing support assembly kit #299705, which
includes the above shims, to obtain proper end play.
Auxiliary P.T.O. -- Model Series 92580,
92980, 94580, 94980, 110980, 111980
This auxiliary power take-off shaft is perpendicular to the
crankshaft. It rotates at the rate of one revolution for
every 81/2 revolutions of the crankshaft. On these
models, the cam gear, worm gear and oil slinger are a
Factory assembly and are not available as separate
pieces. See Fig. 27.
Fig. 27. Remove and Install Sump Screw
NOTE: If rotation is counterclockwise, the thrust washer
is placed next to the worm gear on camshaft.
To remove the sump: One of the six sump mounting
screws is located under the auxiliary drive cover.
Remove the cover. Lift out shaft stop. See Fig. 28.
Slide gear and shaft sideways to expose head of sump
mounting screw. Use 7/16" socket to remove screw.
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