Service Manual

Groundsmaster 4100--D/4110--DPage 5 -- 42Electrical System
Wing Deck Position Switches
Two (2) wing deck position switches are used on the
Groundsmaster 4100--D and 4110--D as inputs for the
TEC--5001 controller. The position switches are pow-
ered proximity switches that are normally open. The
switches incorporate an internal reed switch and a LED.
These switches are secured to the center section of the
cutting deck (Fig. 55). A bolt head on the wing deck link
is the sensing plate for the position switch (Fig. 56).
When a wing deck is lowered, the bolt head on the wing
deck link is positioned close to the position switch caus-
ing the switch to close. The closed switch provides an
inputfor the TEC--5001 controller to allow wing deck op-
eration.When awing deck is raised,the bolthead on the
wing deck link is moved away from the position switch
sotheswitchisinits normallyopenstate.Theopenposi-
tion switch prevents wing deck operation w hen the wing
deck is raised.
Testing
1. The cutting deck position switches and their circuit
wiring should be tested as a TEC--5001 input with the
Diagnostic D isplay (see Diagnostic Display in the Trou-
bleshooting section of this chapter). If the Diagnostic
Displayverifiesthatthepositionswitches andcircuitw ir-
ing are functioning correctly, no further switch testing is
necessary. If, however, the Display determines that a
positionswitchandcircuitwiringare notfunctioningcor-
rectly, proceed with test.
2. Park machine on a level surface, lower cutting deck
(including wing decks), stop engine and apply parking
brake. Remove switch cover from deck to allow access
to switch that requires testing (Fig. 55).
3. Turn ignition switch to the ON position (do not start
engine) and check LED on cable end of position
switches. LED should be illuminated when the wing
decks are fully lowered.
4. Startengine, fully raise wingdecks andthen stop en-
gine.Then,turnignition switchtotheONposition( do not
start engine) and check LED on cable end of position
switches.LEDshould notbe illuminatedwhen thewing
decks are fully raised.
5. Lower wing decks and then stop engine.
6. If a position switch LED did not function correctly:
A. Make sure that ignition switch is OFF and discon-
nect the switch connector from deck wire harness.
B. Using a multimeter, verify that wire harness con-
nector terminal for pink wire has 12 VDC when the
ignition switch is ON.
C. Make sure that gap between end of position
switchandboltheadon wingdeck linkwhen thewing
deck is lowered is from 0.070” to 0.130” (1.8 to 3.3
mm) (Fig. 56).
D. Ifpinkwire hassystemvoltage presentandgap is
correctbut switch LED did not function,replace posi-
tion switch.
7. After testing is complete, make sure that switch con-
nector is plugged into deck w ire harness. Install switch
cover to deck.
1. Switch cover
2. Position switch
3. Switch bracket
4. Lock washer (2 used)
5. Jam nut (2 used)
Figure 55
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2
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4
5
1. Position switch
2. Bolt head
3. Wing deck link
4. Gap location
Figure 56
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