Cutting Deck Lift Switches
The cutting deck lift switches are used as inputs for the
TEC controller to raise or lower the cutting decks. When
the front of a lift switch is depressed and held, the con-
trolled decks will lower. When the rear of a lift switch is
depressed and held, the controlled decks will raise. The
decks will remain in position when the switch is re-
leased. The lift switches are located on the console arm
(Fig. 20).
7. After testing is completed, connect wire harness
connector to the lift switch.
8.
Assemble console arm (see Console Arm Assembly
in the Service and Repairs section of Chapter 7 -- Chas-
sis).
NOTE: To lower the cutting decks, traction speed has
to be in low range (4WD). Also, to raise or lower the
decks, the seat has to be occupied.
Testing
1.
Before disconnecting the lift switch for testing, the
3
switch and its circuit wiring should be tested as a TEC
input with the Diagnostic Display (see Diagnostic Dis-
playintheTroubleshootingsectionofthischapter).Ifthe
Diagnostic Display verifies that the lift switch and circuit
wiring are functioning correctly, no further switch testing
is necessary. If, however, the Display determines that
the lift switch and circuit wiring are not functioning cor-
rectly, proceed with test.
1
2
4
Figure 20
1.
2.
Console arm
Lift switch (#1 to #5)
3.
4.
Lift switch (GM4700 #7)
Lift switch (GM4700 #6)
2.
Make sure ignition switch is OFF. Remove key from
ignition switch.
3.
Disassemble console arm to gain access to cutting
#4
#1
#5
deck lift switches (see Console Arm Disassembly in the
Service and Repairs section of Chapter 7 -- Chassis).
CUTTING
DECK
LOCATIONS
4.
Disconnect harness electrical connector from the lift
switch.
5.
22.
The switch terminals are marked as shown in Figure
The circuit logic of the lift switches is shown in the
#
6
#2
#3
#7
(GM4700)
(GM4700)
chartbelow.Withtheuseofamultimeter (ohmssetting),
theswitchfunctionsmaybetestedtodeterminewhether
continuity exists between the various terminals for each
position.Verifycontinuity betweenswitch terminals.Re-
place switch if testing identifies a faulty switch.
Figure 21
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
DECK LOWER
2 + 3
2 + 1
5 + 4
5
+ 6
NEUTRAL
NONE
2 + 1
ALL
DECK RAISE
2 + 3
5 + 6
5
+ 4
BACK OF SWITCH
Figure 22
6.
Ifliftswitch tests correctly and circuitproblem stillex-
ists, check wire harness (see Electrical Schematics and
Wire Harness Drawings in Chapter 9 -- Foldout Draw-
ings).
NOTE: Lift switch terminals 4, 5 and 6 are not used on
Groundsmaster 4500--D and 4700--D machines.
Groundsmaster 4500--D/4700--D
Page 5 -- 19
Electrical System
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