Traction Neutral Switch - Toro Groundsmaster 3280-D Service Manual

Traction Neutral Switch

The traction neutral switch is a normally open proximity
switch that closes when the traction pedal is in the neu-
tral position. A socket head screw threaded into the hy-
drostat neutral return arm acts as the sensing plate for
the switch.
The Standard Control Module monitors the operation of
the traction neutral switch. If the ignition switch is in the
ON position and the traction pedal is in the neutral posi-
tion, the Module Neutral input LED should be illumi-
nated.
Testing
1. Park machine on a level surface, lower cutting deck
(or implement), stop engine, engage parking brake and
remove key from the ignition switch.
2. Disconnect the electrical connector from the neutral
switch.
3. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the connector termi-
nals.
4. With the ignition switch in the OFF position, slowly
push the traction pedal in the forward and reverse direc-
tion while watching the multimeter. Continuity should be
broken in both the forward and reverse directions.
5. Allow the traction pedal to return to the neutral posi-
tion. There should be continuity across the terminals.
6. Reconnect electrical connector to the neutral switch.
Adjustment
1. Before adjusting the traction neutral switch, check
and adjust traction system neutral position (see Traction
Unit Operator's Manual).
IMPORTANT: To prevent traction neutral switch
damage, make sure that end of socket head screw
does not contact switch.
2. Loosen jam nut on socket head screw.
3. Rotate socket head screw so the clearance between
end of the socket head screw and neutral switch is .125"
(3.2 mm) (Fig. 22).
4. Torque jam nut from 71 to 89 in−lb (8 to 10 N−m) to
secure adjustment. After jam nut is tightened, make
sure that clearance between socket head screw and
neutral switch has not changed.
5. Check for proper switch operation (see Testing
above).
Groundsmaster 3280−D/3320
2
1. Neutral switch
2
1. Neutral switch
2. Socket head screw
Page 6 − 17
1
Figure 21
2. Neutral return arm
.125"
(3.2 mm)
1
3
Figure 22
3. Neutral return arm
Electrical System