Hello,
We have a 2010 Kubota B2530 hydro with a rear PTO issue which I would like to see if anyone can help solve.
The PTO works itself fine with an implement on and with a PTO implement attached the PTO doesn't spin when disengaged.
However with nothing attached the PTO engages and disengages correctly but the PTO shaft doesn't stop spinning. There is no real load however as jamming a bit of wood easily stops the PTO.
This led us thinking that we had a PTO brake issue and we ended up splitting the tractor to hopefully come across an issue with the hydraulic PTO pack. With the pack on the bench we measured all the thicknesses of the friction disks with digital vernier calipers at 2mm. Kubota give a tolerance of 1.8-2.1mm (sorry uk metric) but basically not even half warn and we also measured the metal plates which haven't worn either. We did find one friction disk had lost its teeth on the inside so ordered one replacement from our local Kubota dealer. As a mater of cause we fitted a new PTO brake disc to be sure.
Everything looked 100% in our opinion and we set about rebuilding the tractor. We rebuilt the tractor and still had the same problem, the PTO when disengaged still spins at 130 rpm, we measured this with a digital tachometer.
Scratching our heads we thought maybe using the correct Kubota transmission oil would do the trick and that the oil which we were using was too thick thus giving too much film through the clutch pack and giving the PTO shaft a light drive. This made no difference either.
We have pressure tested the PTO control valve at 200PSI at 540 PTO RPM (2300 engine RPM) and doesn't drop on engagement.
We are lost at the moment, even our local Kubota dealer can't shed any light?
Many thanks.
We have a 2010 Kubota B2530 hydro with a rear PTO issue which I would like to see if anyone can help solve.
The PTO works itself fine with an implement on and with a PTO implement attached the PTO doesn't spin when disengaged.
However with nothing attached the PTO engages and disengages correctly but the PTO shaft doesn't stop spinning. There is no real load however as jamming a bit of wood easily stops the PTO.
This led us thinking that we had a PTO brake issue and we ended up splitting the tractor to hopefully come across an issue with the hydraulic PTO pack. With the pack on the bench we measured all the thicknesses of the friction disks with digital vernier calipers at 2mm. Kubota give a tolerance of 1.8-2.1mm (sorry uk metric) but basically not even half warn and we also measured the metal plates which haven't worn either. We did find one friction disk had lost its teeth on the inside so ordered one replacement from our local Kubota dealer. As a mater of cause we fitted a new PTO brake disc to be sure.
Everything looked 100% in our opinion and we set about rebuilding the tractor. We rebuilt the tractor and still had the same problem, the PTO when disengaged still spins at 130 rpm, we measured this with a digital tachometer.
Scratching our heads we thought maybe using the correct Kubota transmission oil would do the trick and that the oil which we were using was too thick thus giving too much film through the clutch pack and giving the PTO shaft a light drive. This made no difference either.
We have pressure tested the PTO control valve at 200PSI at 540 PTO RPM (2300 engine RPM) and doesn't drop on engagement.
We are lost at the moment, even our local Kubota dealer can't shed any light?
Many thanks.
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