Adjustments; Adjustments; Parking Brake Switch - Toro Greensmaster TriFlex 3320/3420 Service Manual

Adjustments

Parking Brake Switch

The parking brake switch is a normally open proximity
switch that mounts to the frame bracket used to attach
the parking brake lever assembly (Fig. 30). The sensing
plate for the brake switch is a tab on the parking brake
lever assembly. The Toro Electronic Controller (TEC)
monitors the operation of the parking brake switch.
When the parking brake is not applied, the tab on the
parking brake lever is positioned near the target end of
the parking brake switch causing the switch to close.
The tab on the parking brake lever is moved away from
the switch when the parking brake is applied causing the
switch to open.
Adjustment
1. When the parking brake is not applied, the gap be-
tween the parking brake switch and the tab on the park-
ing brake lever should be 0.125" (3.2 mm) (Fig. 30).
2. If gap is incorrect, loosen jam nuts that secure switch
to frame bracket. Position switch with jam nuts to allow
correct gap between switch and brake lever tab. Tighten
jam nuts to secure adjustment. Jam nuts should be
torqued from 162 to 198 in- -lb (18.4 to 22.4 N- -m). After
jam nuts are tightened, make sure that clearance be-
tween head of parking brake switch and tab on the park-
ing brake lever has not changed.
3. After adjustment to the parking brake switch, use the
Hand Held Diagnostic Display to verify that parking
brake switch and circuit wiring are functioning correctly
(see Hand Held Diagnostic Display in the Troubleshoot-
ing section of this chapter).
Electrical System
1. Brake lever
2. Parking brake switch
2
3
1. Parking brake switch
2. Parking brake lever
Page 6 - - 38
1
3
4
2
Figure 30
3. Brake lever tab
4. Gap
1
4
4
162 to 198 in- -lb
(18.4 to 22.4 N- -m)
Figure 31
3. Jam nut (2 used)
4. Lock washer (2 used)
Greensmaster 3320/3420
3