kubota 8200 hydraulic problem

[starcraft1976]

i just bought a 1986 kubota b8200 it had a bearing and oil seal bad in the transmission ,most of the hydraulic oil had leaked out. i replaced the bearing and seal, cleaned out the transmission and filter.got it all back together and it worked great, the three point lifted smooth with no noise for a couple of hours then it stopped lifting.now it comes and go's sometimes it lifts and sometimes it don't.anybody got any ideas. thanks alot

 

[tractorworks]

Airlock???? Don't know how to bleed, but that is where I would be looking... Good luck and let us know. Hopefully you will get a better answer.