MTD Garden Tractors User Manual page 119

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Figure 5-21. Forward - Low Range
To shift into high range the same high/low
clutch collar is moved to the right, disengaging
the low range gear, moving through the neutral
position. See Figure 5-22.
Figure 5-22.
Engage the 20 tooth gear which drives the 27
tooth gear on the output shaft which drives bull
gear, differential, and axle shaft. See Figure 5-
23.
Figure 5-23.
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To go into the reverse position the shift lever
moves through neutral, assuring that the high/
low clutch collar is in the neutral position, (see
Figure 5) and engages the reverse clutch col-
lar into the 9 tooth sprocket of the reverse
chain assembly. The chain then drives the 16
tooth sprocket on the output shaft, again driv-
ing the bull gear, differential, and axle shaft in
reverse. See Figure 5-24.
Figure 5-28.
A chain and sprocket assembly allow two
shafts to turn in the same direction. This is how
reverse is achieved in this transmission. Using
gears on two shafts reverses the direction that
the shafts turn. This is how the high/low range
gears operate, as shown in Figure 5-25.
Figure 5-25.
The differential assembly is used to allow the
left and right axles to turn at different speeds.
This occurs when the tractor turns. The inside
axle slows down and the outside axle must
speed up. Gears within the differential allow
this to happen without changing the ground
speed of the unit. Not having a differential
would tear up the lawn or the transmission dur-
5-7
5