Safety switch or pto

[Martinsnob]

I have a 2016 kubota z726x, it fires up no problem but as soon as i release the brake it kills the engine, also if i leave the brake engaged and pull the pto switch it kills the engine. What could the problem be? If i move the belt on the pto by hand it sounds like the pto clutch is full of dirt or sand, could it be the electric pto clutch? It only has 270 hours on the machine, hoping someone can point me in the right direction

 

[Martinsnob]

Could it be the pto switch?

 

[lugbolt]

Probably the OPC relay. There are several relays under the left side of the front panel kinda behind where your left foot normally goes. They aren't marked so you have to dig out your workshop manual's wiring diagram and figure out which relay is what based on the wire colors, replace the opc relay and see if that solves your issue.

 

[GreensvilleJay]

re: 'sand/grining' .....'newish' E-PTO units have magnets on them ,used as brakes to slow down , stop, hold the belt when power is off...