Here's what it says in the
online manual for the 4320 :
Using Rear PTO (Operator off Seat)
NOTE: The rear PTO can be engaged with the operator off the seat. The Safety Interlock System will stop the engine and all implements if the mid-PTO is engaged and the operator gets off the seat.
Engaging Rear PTO
1. Sit on operator's seat.
2. Move transmission to neutral position:
· PowrReverser: Depress clutch pedal completely and move the transmission gear and range shift levers to the N (neutral) position. Move the reverser lever to the N (neutral) position.
· eHydro: Move the range shift lever to the N (neutral) position.
3. Lock park brake.
4. Push the rear and mid PTO knobs to the disengaged/off position.
NOTE: The starter will not crank if the rear PTO knob is pulled to the engaged/on position.
5. Start the engine and adjust speed to 1500 rpm.
6. Get off the operator's seat.
7. Pull the rear PTO knob to the engaged/on position to engage the PTO.
· The engine should continue to run.
· The instrument panel PTO engaged light will illuminate when the rear PTO is engaged.
8. Adjust the hand throttle lever forward to the desired speed for implement used.
NOTE: The tachometer indicates a standard 540 PTO at engine speed of 2400 rpm.