Service Manual

SECTION 4
CAUTION! Servicing the Power Shift Snowthrower will
require working with some of the moving parts. To
prevent accidental starting of the engine while
performing service, take the following precautions:
Rotate the ignition key to
off and remove
Pull the wire
off the spark plug
Make sure the wire does not accidentally touch
the spark plug
CAUTION! The Power Shift Snowthrower has the
feature of being able to be stood on the front housing
for service and storage. Always drain the fuel from the
tank prior to such service taking the following
precautions:
Drain
it outdoors and make sure the engine is cool
Wipe up any gasoline that may have spilled
Do not drain the gasoline near any open flame or
Do not smoke when handling gasoline
spark
Idler System Operation
See Figure 61
Figure 61
The idler assembly is comprised of
two idler pulleys, one
for the traction belt and one for the impeller belt and the
auger brake.
The traction idler pulley rotates about a plastic bushing
and is centered by
two springs. The lower spring returns
the idler to the disengaged position once tension is
released from the cable. The other spring is attached to
the traction cable and prevents over-tensioning.
IDLER SYSTEM
The impeller idler pulley is set up similarly, again rotating
about a plastic bushing and using
two springs, one for
return and the other to prevent over-tensioning.
Also rotating about the same shaft is the brake arm. It is
spring loaded
so that the brake pad is pressing against
the impeller pulley whenever there is no tension on the
impeller cable. When the impeller is engaged, the
impeller idler arm pulls the brake
off of the impeller
pulley.
Idler System Removal
1. Remove the three cap screws securing the belt
cover to the snowthrower frame.
2. Remove the
two hex head cap screws securing
the idler assembly to the snowthrower frame.
See
Figure 62.
Figure 62
3. Pull the idler assembly from the frame and
disconnect the
two idler springs from the lower
arm bracket. See Figure
63.
4. Remove the hex head cap screw and nylon lock
nut from the idler arm bracket and remove the
traction and impeller cables.
Idler System Disassembly
1. De-tension the impeller brake torsion spring by
moving the short end of
the spring off the idler arm
bracket tang.
the idler pin on the impeller brake side.
2. Remove the snap ring and Belleville washer from
Power Shift Snowthrowers
57 Idler System