kubota l3710 pto won't disengage

[swmillbrook]

have taken tractor twice to dealer with same problem. pto won't disengage. they said they haven't ever encountered this problem before. it has 100 hrs. on it since the first time it was "fixed". this time, they said a bolt was broken off? any suggestions why this keeps happening? kubota doesn't seem to know. i paid $1200.00 on first visit. as i said, it only has had 100hrs put on it since & not all of it was pto driven time. help....kubota l3710 gst

 

[rbargeron]

One of the available pto types the L3710 GST is "independent" and uses a hydraulic clutch for engagement. The clutch itself rarely fails but the valve that controls it has a cable to the engagement lever. Maybe something is interfering with the travel of the valve? The valve is under the right floorboard - check to see if it's linkage moves when the pto lever moves. If valve motion seems normal then the problem may be inside and more serious. Good luck

 

[JC-jetro]

There is a delivery pipe that provide hyd oil to the pto clutch pack along with a solenoid valve. There is a pressure port (plug)that register pressure available passed the solenoid feeding the pto clutch piston. With pto off you should register 0 psi and with pto switch/lever on you should read 250+ psi (need to refer to your specific model pressure specs). if the solenoid valve is leaking by causes the clutch pack to squeeze together causing rotation pto final shaft. I'd ask the dealer if he tested the pto hyd pressure and what was the result. if you have a liq filled gauge and right adapter you can do the test yourself. Make sure the connection to the pressure port is done with the engine off.

JC,