Cutting Deck Position Switch
Thecuttingdeckpositionswitchisanormallyopenprox-
imityswitchthatislocatedonthetractionunitframe(Fig.
3
14).
The sensing plate is located on the cutting deck lift
arm. The GM 4500--D uses two cutting deck position
switches:fordecks4and5.There arefour deckposition
switches on the GM 4700--D: for decks 4, 5, 6, and 7.
1
2
When the cutting deck is raised, the sensing plate is
moved away from the position switch and the switch
opens. This open switch prevents current flow to the
PTOrelayandthecuttingdeckhydraulicsolenoidvalve,
keeping the cutting decks from operating.
Switch Testing
Figure 14
3.
1.
stop engine, engage parking brake, and remove key
from the ignition switch.
Park machine on a level surface, lower cutting units,
1.
2.
Position switch
Switch connector
Lift arm (#5 shown)
2.
Disconnectdeckpositionswitchthatrequires testing
from machine wiring harness.
#4
Deck
#1 Deck
#5 Deck
3.
multimeter (ohms setting) across the switch connector
terminals.
Check the continuity of the switch by connecting a
4.
should be continuity across the switch terminals.
With the cutting unit in the lowered position, there
#
2
#3
Deck
#
6 Deck
#7 Deck
(GM4700)
5.
across the switch terminals.
Raise the cutting unit. There should be no continuity
Deck
(GM4700)
6.
Replace switch as needed. Reconnect switch.
Switch Adjustment
Adjust switch to have 1/16 in (1.6 mm) clearance be-
1.
CUTTING DECK LOCATIONS
tween switch and sensing plate on the lift arm.
Figure 15
Electrical System (Rev. A)
Page 5 -- 12
Groundsmaster 4500--D/4700--D
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| Document Type | Service Manual |
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