Drive Train Operation - Toro Workman HDX Auto Service Manual

Drive Train Operation

Drive Train Operation
Workman HDX Auto vehicles have a variable speed
drive system with positions for neutral, forward high and
low range, reverse and park. Drive system components
include an engine driven primary clutch, a secondary
clutch, a CVT drive belt, a transmission, a drive shaft
driven rear differential and two (2) CV (constant velocity)
axles to drive the rear wheels. On vehicles with optional
four wheel drive, a second drive shaft, a front differential
and two (2) additional CV (constant velocity) axles are
used to drive the front wheels. The vehicle must be fully
stopped before shifting to reverse from a forward gear
(either low forward or drive position) or to a forward gear
from reverse.
Power is transferred from the engine to the transmission
by a variable clutch system that consists of two (2)
clutches connected by a drive belt. The primary clutch is
mounted to the engine crankshaft and the secondary
clutch is mounted to the transmission input shaft. The
transmission has positions for park, reverse, neutral, low
speed forward and drive speed forward operation.
The drive system features Speed Control that delivers
precise speed range control to limit the maximum
ground speed of the machine for operations that require
a constant speed like spraying and topdressing. The
speed range lever mounted to the seat base console
(Fig. 2) is used to select one of four (4) work speed
ranges that are used to limit maximum ground speed or
a transport speed range that is used when the machine
is moved between job sites. The accelerator pedal must
be released before shifting between speed ranges but
the vehicle does not need to be stopped.
A rear output shaft in the transmission transfers power
from the transmission to the rear differential and then to
the rear wheels. Two (2) identical CV (constant velocity)
axles transfer power from the rear differential to the rear
wheels. A dash mounted switch allows the operator to
engage the rear differential lock for increased traction at
slow speeds. A fully independent rear suspension and
Dedion type rear axle isolates the engine, transmission
and main frame from all vehicle load forces, eliminating
stress to these main components.
On units equipped with optional four wheel drive, a front
output shaft in the transmission transfers power from the
transmission to the front differential and then to the front
wheels. For information on the front wheel drive system,
see Chapter 8 − Four Wheel Drive (Optional Kit).
Drive Train
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2
1. Transmission lever
1. Speed range lever
Page 4 − 4
Figure 1
2. Transmission positions
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Figure 2
2. Speed range positions
Workman HDX Auto
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