PTO Switch
The PTO switch is located on the console arm (Fig. 24).
The PTO switch is pulled up to engage the PTO and
pushed in to disengage the PTO.
6. If PTO switch tests correctly and circuit problem still
exists, check wire harness (see Electrical Schematics
and Wire Harness Drawings in Chapter 10 -- Foldout
Drawings).
The TEC--5001 controller monitors the position of the
PTO switch (up or down). Using inputs from the PTO
switch and other switches in the interlock system, the
TEC--5001 controller controls the energizing of the hy-
draulic solenoid valves used to drive the cutting deck
motors.
7. After testing is completed, connect the wire harness
connector to the PTO switch.
8.
Assemble console arm (see Console Arm Assembly
in the Service and Repairs section of Chapter 7 -- Chas-
sis).
NOTE: To engage the PTO, the seat has to be occu-
pied, traction speed has to be in Low range (4WD) and
the cutting deck has to be fully lowered.
1
Testing
1.
Before disconnecting the PTO switch for testing, the
switch and its circuit wiring should be tested as a
TEC--5001 input with the Diagnostic Display (see Diag-
nostic Display in the Troubleshooting section of this
chapter). If the Diagnostic Display verifies that the PTO
switch andcircuit wiring arefunctioning correctly,nofur-
ther switch testing is necessary. If, however, the Display
determines that the PTO switch and circuit wiring are
not functioning correctly, proceed with test.
2
2.
ignition switch.
Make sure ignition switch is OFF. Remove key from
Figure 24
2. Control console
1.
PTO switch
3.
switch (see Console Arm Disassembly in the Service
and Repairs section of Chapter 7 -- Chassis).
Disassemble console arm to gain access to PTO
4
1
4.
Disconnect harness electrical connector from the
PTO switch.
5
2
5.
25.
The switch terminals are marked as shown in Figure
The circuit logic of the PTO switch is shown in the
chartbelow.Withtheuseofamultimeter (ohmssetting),
the switch functions can be tested to determine whether
continuity exists between the various terminals for each
switch position. Verify continuity between switch termi-
nals. Replace switch if testing identifies that switch is
faulty.
3
6
Figure 25
1.
2.
3.
COM B terminal
NO B terminal
NC B terminal
4.
5.
6.
COM C terminal
NO C terminal
NC C terminal
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
NOTE: Only PTO switch terminals COM C and NO C
are used on Groundsmaster 4100--D and 4110--D ma-
chines.
OFF (DOWN)
COM B + NC B COM B + NO B
COM C + NC C COM C + NO C
ON (UP)
COM B + NO B COM B + NC B
COM C + NO C COM C + NC C
Electrical System
Page 5 -- 24
Groundsmaster 4100--D/4110--D
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