Pto Switch - Toro Groundsmaster 4100-D Service Manual

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.
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.
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.
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 and circuit wiring are functioning correctly, no fur-
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. Make sure ignition switch is OFF. Remove key from
ignition switch.
3. Disassemble console arm to gain access to PTO
switch (see Console Arm Disassembly in the Service
and Repairs section of Chapter 7 -- Chassis).
4. Disconnect harness electrical connector from the
PTO switch.
5. The switch terminals are marked as shown in Figure
25. The circuit logic of the PTO switch is shown in the
chart below. With the use of a multimeter (ohms setting),
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.
SWITCH CLOSED
POSITION CIRCUITS
OFF (DOWN) COM B + NC B
COM C + NC C
ON (UP) COM B + NO B
COM C + NO C
Electrical System
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).
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).
OPEN
CIRCUITS
NOTE: Only PTO switch terminals COM C and NO C
are used on Groundsmaster 4100--D and 4110--D ma-
COM B + NO B
COM C + NO C chines.
COM B + NC B
COM C + NC C
Page 5 - - 24
2
Figure 24
1. PTO switch
Figure 25
1. COM B terminal
2. NO B terminal
3. NC B terminal
Groundsmaster 4100--D/4110--D
1
2. Control console
4
1
5
3
6
4. COM C terminal
5. NO C terminal
6. NC C terminal
2