Service Manual

39Tuff Torq Model K61A Hydrostatic Transaxle Belts and Linkage
Cruise Control
Description and Operation
The hydrostatic transaxle can be held at a desired speed
with cruise control, standard equipment on some models.
Its effect on the transmission system is described below.
For electrical troubleshooting, refer to the Toro Riding
Products Demystification Guide, form 492--4509.
The cruise control is activated by a three-position rocker
switch located on the right-hand side of the dash panel.
Cruise can be set with the ignition switch in the LIGHTS
or RUN position. A green light on the rocker switch
illuminates to indicate that the cruise control is ON.
After starting the tractor and reaching the desired
operating speed, engage the cruise control by placing the
control switch in the SET position. This activates the
electromagnet which holds the hydrostatic pedal in place.
The cruise can be disengaged by depressing the brake
pedal or by placing the rocker switch in the OFF position.
Electrical current to the magnet is interrupted, and the
hydrostatic pedal returns to neutral.
Cruise control will function with the hydrostatic pedal in
either the forward or reverse position.
The tractor cannot be started with the cruise control
engaged. To start the tractor, the brake pedal must be
depressed, and this disengages the cruise feature.
Figure 132
Components
Figure 133
1. Rocker switch and
housing
2. Plate-hydrostatic control
arm and bracket
3. Bracket magnet
4. Magnet
5. Brake switch and
mounting bracket
6. Replay
7. Wire harness
Plate-Hydrostatic Control Arm and Housing
The plate is mounted to the hydrostatic control arm by a
bracket. Because of the plate’s thickness, a longer bolt is
needed to fasten the hydrostatic linkage to the control
arm.
The magnet’s electrical leads are routed along and tied to
the hydrostatic reservoir hose. These leads must not
come in contact with any moving parts, i.e., the fan, belts,
pulleys, linkage, etc.
Figure 134