Chapter 12
(Sportsman Motorcycle with Driven Sidecar)
The Main Drive and Differential
To knock down the main drive:
Remove the two bolts attaching the propeller shaft fork to
the sun gear flange and
move the fork in the direction of the side-car giving access
to the rear wheel axle nut. Remove the wheel. Remove the
brake shoes. Drain out the oil from the main drive gear
case. Remove the collar and the cover. Remove the gear
case cover nuts and remove the cover together with the
gasket.
Differential body and gears:
Remove the nut from the cover together with the sun gear
and seal. Tap lightly to remove the differential body with
seal from the cover. Remove the epicycle gear with two
sets of rollers and seal and spacer from the case. Remove
the driven conical gear with the hub. Remove the needle
rollers from the splines in the hub in the gear case.
Proceed further as described in the standard repair manual.
Assembling the main drive is effected in reversed order.
Before tightening the nut in the case cover, the sun gear flange
with seal and ball bearing should be installed. The bronze ring
should be positioned onto the sun gear neck next after the steel
ring. After putting the main drive together, check and adjust the
side play of the conical gears by tightening or loosening the nut in
the case cover. When side play of 0.004"-0.012"/.01 to 0.3 mm is
achieved, stop adjusting and fix the nut with the retainer.
To knock down the bearing unit of the sidecar wheel:
Remove the fork of the propeller shaft from the flange of the
sun gear of the main drive. Remove the sidecar wheel.
Note: The Sportsman has a nut securing the axle of the rear wheel
in place. Do not try to get the Sportsman's axle out, you may bend
the bike's frame.
Remove the brake shoes. Remove the wheel axle in the
direction of the sidecar. Remove the brake drum cover.
