Parking Brake Switch - Toro Groundsmaster 4700-D Service Manual

Parking Brake Switch

The parking brake switch is a normally open proximity
switch. The parking brake switch is attached to the bot-
tom of the RH brake pedal (Fig. 28).
When the parking brake is not applied, the parking brake
detent is positioned near the target end of the parking
brake switch so the switch is closed. The parking brake
detent is moved away from the switch when the parking
brake is applied causing the switch to open.
Switch Testing
1. Park machine on a level surface, lower cutting
decks, stop engine.
2. Before disconnecting the parking brake switch for
testing, the switch and its circuit wiring should be tested
as a TEC input with the Diagnostic Display (see Diag-
nostic Display in the Troubleshooting section of this
chapter). If the Diagnostic Display verifies that the brake
switch and circuit wiring are functioning correctly, no fur-
ther switch testing is necessary. If, however, the Display
determines that the brake switch and circuit wiring are
not functioning correctly, proceed with test.
3. Make sure ignition switch is OFF. Remove key from
ignition switch.
4. Disconnect wire harness electrical connector from
the parking brake switch.
5. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the connector termi-
nals.
6. When the parking brake is released (brake not ap-
plied), there should be continuity (closed) between the
switch terminals.
7. When the parking brake pedal is depressed (brake
applied), there should not be continuity (open) between
the switch terminals.
NOTE: When installing the parking brake switch to the
brake pedal, place switch plate tab into switch mounting
hole that is closest to target end of switch (Fig. 29).
8. Replace parking brake switch if testing determines
that it is faulty.
9. After testing is complete, connect wire harness elec-
trical connector to the brake switch.
Groundsmaster 4500--D/4700--D
2
3
4
5
1. RH brake pedal
2. Brake detent
3. Carriage screw
1. Brake switch
Page 5 - - 23
1
6
Figure 28
4. Switch plate
5. Brake switch
6. Lock nut
1
2
Figure 29
2. Switch target area
Electrical System