Cutting Deck Position Switch - Toro Groundsmaster 4000-D Service Manual

Cutting Deck Position Switch

The cutting deck position switches on the Groundsmas-
ter 4000--D are located on the traction unit frame (Fig.
51 and 52). The position switch is a normally open, pow-
ered proximity switch that incorporates an internal reed
switch and relay (see schematic in Figure 53). The sens-
ing plate is located on the cutting deck lift arm. The
switches for front and side decks are the same although
their operation depends on deck location.
When a side cutting deck is raised, the sensing plate is
moved away from the position switch and the switch
opens. The open switch prevents current flow to the side
deck solenoid and keeps the deck from operating.
When the front cutting deck is raised, the sensing plate
is moved near the position switch and the switch closes.
The closed switch prevents current flow to the front deck
solenoid and keeps the deck from operating.
Testing
1. Park machine on a level surface, lower cutting
decks, stop engine, apply parking brake and remove
key from the ignition switch.
2. Locate switch that requires testing and disconnect
switch connector from machine wiring harness.
3. Ground switch connector terminal for black wire and
apply 12 VDC to switch connector terminal for red wire.
4. Using a multimeter, verify that switch connector ter-
minal for blue wire has 12 VDC and terminal for white
wire has 0 VDC.
5. Place metal object near sensing area of switch (op-
posite end from wires). Ground switch connector termi-
nal for black wire and apply 12 VDC to switch connector
terminal for red wire.
6. Using a multimeter, verify that switch connector ter-
minal for blue wire has 0 VDC and terminal for white wire
has 12 VDC.
7. Replace switch as needed.
Adjustment
NOTE: Deck Proximity
(TOR4095) can be used for switch adjustment.
1. The sensing plate on side deck lift arms should be
0.060" to 0.120" (1.5 to 3.0 mm) from target surface of
position switch.
2. On front deck lift arm, slide sensing plate as far from
the lift arm as possible.
Electrical System
Switch Adjustment Tool
Page 5 - - 32
3
Figure 51
1. Position switch (front)
2. Sensing plate
2
Figure 52
1. Position switch (side)
Figure 53
1
2
3. Front lift cylinder
1
2. Sensing plate
BLUE
WHITE
BLACK
RED
SWITCH CONNECTOR
Groundsmaster 4000--D