Pto Switch - Toro Groundsmaster 4300-D Service Manual

PTO Switch

Testing the PTO Switch
Groundsmaster ® 4300-D
16226SL Rev C
g191000
1. PTO switch
g191001
The PTO switch is located on the control arm
decks to operate when the front of the switch is pressed. An indicator light on the
switch identifies when the PTO switch is engaged.
The TEC 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 controls the
energizing of the hydraulic solenoid valves used to drive the cutting deck motors.
Note: To engage the PTO, the seat has to be occupied, the mow speed limiter
has to be in the M position, and the cutting decks have to be fully lowered.
OW
1. Park the machine on a level surface, lower the cutting decks, set the parking
brake, and shut off the engine.
2. Before you disconnect the PTO switch for testing, ensure that you test the
switch and its circuit wiring as a TEC electrical input with the InfoCenter
display; refer to Using the InfoCenter Display for Troubleshooting (page
5–26).
3. If the InfoCenter verifies that the PTO switch and circuit wiring are functioning
correctly, no further switch testing is necessary.
4. If the InfoCenter determines that the PTO switch and circuit wiring are not
functioning correctly, proceed with the test.
5. Remove the control arm covers to get access to the PTO switch; refer to
Disassembling the Control Arm (page
6. Ensure that the key switch is in the O
electrical connector from the PTO switch.
7. The PTO switch terminals are identified in
switch is shown in the
Figure 163
2. Control arm
Figure 164
(Figure
6–24).
position. Disconnect the wire harness
FF
Figure 164
Circuit Logic Table (page
Page 5–53 Electrical System: Testing the Electrical Components
163) and allows the cutting
and the circuitry of the
5–54). With the use of a