Service Manual

SECTION 5 PIVOT AND LATCH SYSTEM
CAUTION! Servicing the Power Shift Snowthrower will position, the latch rod and the latch plate retain the pivot
require working with some of the moving
parts. To arms. See Figure 68.
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
PIVOT SYSTEM
Pivot System Operation
The Power Shift snowthrower, like most snowthrowers,
uses a chain to transfer power from the transmission to
the rear axle. However, unlike any other snowthrower,
the Power Shift snowthrower allows the wheels to pivot
forward and backward, thereby transferring weight to
and from the front end. See Figure
67.
Figure 68
The latch rod rests in either of the two stops during
normal operation. However, when power shifting, the
latch cable pulls up on the latch plate thereby allowing
the latch rod to move freely past the stops on the latch
plate.
Power for the swinging action is provided by the
transmission. For instance,
if the operator wishes to
move the wheels from the forward to the rear position,
the latch plate
is moved out of the way, then the
transmission powers the wheels backwards by driving
in reverse.
The standard rear axle is solid, providing no differential
action. An optional differential
kt is available. For more
information on the differential kit, see Section
14,
Differential Kit, page 88.
Pivot System Disassembly
1. Remove the klik pin securing the wheel to the axle
and remove the wheel and tire assembly. Also
remove the thrust washer that fits between the
wheel and the pivot arm.
2. Remove the right half of the chain guard.
3. Remove the nylon locknut that secures the latch
4. Remove the nylon locknuts and Belleville washers
rod to the
left hand pivot arm.
I from the pivot arm pivot bolts. (Thread forming
Figure
67 screws secured the latch rod on '88 units only.)
The pivot arms pivot about an axis coincident with the
NOTE: The
pivot bolts may be difficult to remove
output shaft. This is important because it prevents
from the pivot arms. It
is not necessary that they
changes in chain tension as the axle swings. Once in
be removed at this time.
Pivot and Latch System
60 Power Shift Snowthrowers