Kubota B1620 Operator's Manual page 47

[with Mid PTO type]
To park the tractor and use the PTO system (for chipper
or pump, for example), start the PTO system in the
following steps.
1. Apply the parking brake and place blocks at the tires.
2. Make sure the shift levers are at NEUTRAL, and start
the engine.
3. Set the PTO gear shift lever to "Rear PTO 1st"
position.
4. Set the engine speed to provide recommended rear
PTO speed.
5. Get off the tractor.
(1) Parking brake pedal
(2) Clutch pedal
(1) PTO gear shift lever
A If the PTO system is engaged and you stand up from
the seat and release the parking brake, the engine
stops automatically after standing up.
(A) "DEPRESS"
Rear PTO "1st"
Mid PTO "OFF"
"NEUTRAL"
PTO 31