Kubota B20 Hydraulic oil in engine

[Cloud]

kubota B20. I recently installed a new clutch so split the tractor etc. Put in all new hydraulic fluid and filters, new engine oil and filter. 1st time working it the tractor seemed to get hot, water temp was ok, and then the engine bogged down so I shut it off. After a little research I checked the engine oil and it was overfull. The hydraulic oil was low. The engine oil does not smell like diesel. What would cause the hyd fluid to go into the engine? Could I have connected some hydraulic line wrong? All hydraulics seem to be working. I changed the engine oil so I could put the tractor into my shop. The hyd oil seemed to get hot for just running it 2 minutes. Thanks, Cloud

 

[North Idaho Wolfman]

Greetings neighbor just south of me!
Simple problem, it has blown the seal out of the rear of the hydraulic pump.

Now why did it do that, usually it because of time and wear, and considering it's a b20 that's probably the case, next common reason is that the pressure got to high and blew it out, looking at the seal will usually tell you the answer.
Pull the pump and post a picture of the seal and I might be able to tell you what happened.

 

[Billdog350]

X2 on Wolfman's post. Its definitely your hydraulic pump seal.

 

[Tooljunkie]

Had one on a forklift that did same thing, popped in a seal and leak fixed. Yours may not be the case- especially if seal is popped out.

 

[Cloud]

Thanks for the help. I'll let you know what happens when
I fix that seal. Cloud

 

[Cloud]

So I rebuilt the pump, the seal didn't look damaged other than it was hard, put it together, filled it with oil, let it warm up up for a while before I used it. I made 3 passes on my driveway pulling my box blade. It worked just fine, in the middle of the 4th pass I lost all power to the 3 point, no up or down. Could something be allowing too much pressure to blow that seal again? Thanks, Cloud