Leaking hydraulik pump???

Hey folks,
I'm at work and not able to check so just trying for a second opinion on something I think makes sense.

Remembering the issues with my little tractor the past few weeks....

slobbering out the breather tube, losing coolant, etc. 3 cyl diesel german farmall.

changed the oil (no coolant in the crankcase) and coolant a week or so ago and has been fine (couple drops out the breather tube but not the globs like before.
FF to today, little more messy out the breather tube, coolant is missing some. Oil level is a quart or two over full.
Also, starter gave it up today and when I took it out there was plenty of oil everywhere around the nose (rear main seal leak).

Because the oil was overfull again, I took the drain plug out a little to see if there was water . None. On the way to work, stopped by the kid in town that replaced the headgasket and done some engine work. Told him everything and he handed me a hydraulic pump and said to swap it. because I would be low on hydraulic oil. Makes sense because my 3PH has been sagging under load unless running about 1/2 throttle.

Assuming this is the problem, could this be the reason for the rear main leaking and the druelling out the breather tube? Garage done the timing belt on my kia once and overfilled the oil, all seals leaked until I figured it out and drained some out. Same principal on the tractor?

Thanks, Dave

unless your tractor has a mechanical fuel pump, which I doubt it does then yes your hyd pump could be the cause of the slobbering. with the oil overfilling it rises to the point where the crankshaft begins to hit the oil pool in the sump and starts flinging oil all over the place including up the breather tube. the rear oil seal is a separate problem I think, and may eventually cause the clutch to begin slipping once enough oil gets in there. only cure for that will be to split the tractor and replace the seal. I wouldnt get in too big of a hurry to split it right now because it may just be due to an overfill problem, you never know.

Think it is as simple as an o ring in the pump or is it shot when it leaks. New pumps are about 200 bucks. If a 50 cent seal would fix things it'd be nice. Ever time I get a little money ahead for sensitivity classes, something goes wrong on the tractor. No wonder my people skills suck............

pump should have either an O ring or pressure seal leaking, can be replaced but check shaft for groove worn into it. may need a speedy sleave if grooved