Groundsmaster 4500--D/4700--DPage 5 -- 24Electrical System
Cutting Deck Position Switch
Thecuttingdeckpositionswitchisanormallyopenprox-
imityswitchthatislocatedonthetractionunitframe(Fig.
30). The sensing plate is located on the cutting deck lift
arm. The Groundsmaster 4500--D uses two (2) cutting
deckpositionswitches:fordecks4and5.Therearefour
(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 s witch and the switch closes.
ThisclosedswitchprovidesaninputfortheTECcontrol-
ler to allow the lowered c utting 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
switchfortesting,theswitchandits circuitwiringshould
be tested as a TEC input with the Diagnostic Display
(see Diagnostic Display in the Troubleshooting section
ofthischapter).IftheDiagnosticD isplayverifiesthatthe
positionswitchandcircuitwiringarefunctioningcorrect-
ly,nofurtherswitchtestingisnecessary.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. Disconnectdeckpositionswitchthatrequirestesting
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. Raisethecuttingdeck.Thereshouldbenocontinuity
across the switch terminals.
8. Replace position switch if testing determines that it
is faulty.
9. Aftertestingiscomplete,connectwireharnesselec-
trical connector to the position switch.
Switch Adjustment
1. Adjustswitchto have1/16in(1.6mm) clearancebe-
tween switch and sensing plate on the lift arm.
1. Position switch
2. Switch connector
3. Lift arm (#5 shown)
Figure 30
2
1
3
Figure 31
#4 Deck #1 Deck #5 Deck
#7 Deck
(GM4700)
#6 Deck
(GM4700)
#3
Deck
#2
Deck
CUTTING DECK LOCATIONS
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