Cutting Deck Position Switch - Toro Groundsmaster 4700-D Service Manual

Cutting Deck Position Switch

The cutting deck position switch is a normally open prox-
imity switch that is located on the traction unit frame (Fig.
30). The sensing plate is located on the cutting deck lift
arm. The Groundsmaster 4500--D uses two (2) cutting
deck position switches: for decks 4 and 5. There are four
(4) deck position switches on the Groundsmaster
4700--D: for decks 4, 5, 6 and 7.
When a cutting deck is lowered, the sensing plate is lo-
cated near the position switch and the switch closes.
This closed switch provides an input for the TEC control-
ler to allow the lowered cutting decks to operate.
Switch Testing
1. Park machine on a level surface, lower cutting
decks, stop engine and engage parking brake.
2. Before disconnecting the cutting deck position
switch for testing, the switch and its circuit wiring should
be tested as a TEC input with the Diagnostic Display
(see Diagnostic Display in the Troubleshooting section
of this chapter). If the Diagnostic Display verifies that the
position switch and circuit wiring are functioning correct-
ly, no further switch testing is necessary. If, however, the
Display determines that the position 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 deck position switch that requires testing
from machine wire harness.
5. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the switch connector
terminals.
6. With the cutting deck in the lowered position, there
should be continuity across the switch terminals.
7. Raise the cutting deck. There should be no continuity
across the switch terminals.
8. Replace position switch if testing determines that it
is faulty.
9. After testing is complete, connect wire harness elec-
trical connector to the position switch.
Switch Adjustment
1. Adjust switch to have 1/16 in (1.6 mm) clearance be-
tween switch and sensing plate on the lift arm.
Electrical System
3
1. Position switch
2. Switch connector
#4 Deck
#6 Deck
(GM4700)
CUTTING DECK LOCATIONS
Page 5 - - 24
1
Figure 30
3. Lift arm (#5 shown)
#1 Deck #5 Deck
#2 #3
Deck Deck
Figure 31
Groundsmaster 4500--D/4700--D
2
#7 Deck
(GM4700)