Service Manual
Control
Box
Operation Reverse Control (cont'd)
in reverse. The other is when the wheels are Power
Shifted from the forward to the rear position.
Figure
16
Figure
14
Before trying to understand the Power Shift control box,
first take a moment to understand what is happening on
top of the gearbox. The transmission is spring loaded
into the forward gears.
In
order to reverse the
transmission, the reverse cable must be pulled about
2.0
cm
(3/4”)
to move the sliding jaw from the forward
bevel gear to the reverse bevel gear. See Figure
15.
Figure
17
When the shift lever is pushed into the Power Shift slot,
a tab on the index wheel contacts a tab on the reverse
bellcrank every other time the Power Shift is cycied. See
Figure
18.
Figure
15
The upper end of the reverse cable is connected to the
reverse bellcrank. The reverse bellcrank will rotate and
tension the cable when the operator shifts into reverse
or when he or she Power Shifts the wheels to the rear
position. See Figure
16.
When the gearshift lever is pulled into one
of
the reverse
slots, the reverse lever (visible through the reverse slots
in the control panel) is pushed toward the back of the
snowthrower. The reverse lever is connected to the
reverse bellcrank
so
that as
it
pivots,
it
rotates the
reverse bellcrank and tensions the cable. See Figure
17.
Power
Shift
Controls
42
1
Figure
18
The contact between the
two
tabs forces the reverse
bellcrank
to
rotate.
Power Shift Snowthrowers