Service Manual
SECTION
9
IMPELLER
AND
PULLEY
SYSTEM
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.
Impeller and Pulley Operation
The impeller is a fan which rotatesat approximately
1250
rpm.
It
propels the snow fed to
it
by the auger through
the chute. The impeller
is
connected to the impeller
shaft. The impeller shaft also drives the auger through
the auger gear box.
It
is supported at the auger gear box
by an oil impregnated bushing and at the back of the
front housing by a flange bearing. The impeller shaft is
driven by a pulley, power supplied to that pulley by
the
engine crankshaft and the idler shown in Figure
98.
Figure
98
Impeller and Pulley Removal
1.
Stand the Power Shift Snowthrower on the front
housing and remove the belt cover from the
bottom
of
the frame. Slip the impeller belt
off
the
pulley.
2.
Set the Power Shift Snowthrower back into its
normal position and remove the top
belt
cover
from in front of the engine and slide
it
up the
cables, out of the way.
3.
Remove the chute worm gear assembly from the
front housing and set aside.
4.
Before separating the front housing from the
snowthrower frame, support the rear of the front
housing (that houses the impeller) with blocks.
This will prevent the unit from falling when the
fasteners are removed. Remove the six cap
screws that fasten the front housing to the frame
and
separate the
two
halves. See Figure
99.
Figure
99
Power Shift Snowthrowers
75
Impeller and Pulley System