Engine oil pumping into hydrolics

[Horseshoe#2]

Ya idk very confusing. 1 put over a gallon and a half of oil in it this morning was about over half full on dip stick. Ran for 30 minutes no oil on dip stick trans so full I have got to drain it down . It is to the top of dip stick hole. No leaks clutch works great.

 

[Horseshoe#2]

Unplugged the hdro. Still pumping the oil out. Could it go through the steering column somehow? Leaking a lot around steering column. Idk just hoping for something simple

 

[Horseshoe#2]

Unplugged the hdro. Still pumping the oil out. Could it go through the steering column somehow? Leaking a lot around steering column. Idk just hoping for something simple

 

[sd455dan]

I would eliminate the rear crankshaft oil seal as a possibility.

You can remove the steering assist bracket on the left side of the bell housing to adjust and inspect the 2 stage clutch. It should be dry in there.
If that rear seal is puking oil that bad the inside of the bell housing it would have to be so full of oil that it could get by the trans input shaft or possibly the lower shaft. I find this very, very hard to believe though.
There is also another possibility if you were just losing oil- and that is the crankshaft connecting rod bolt access cover plate gasket on the left side of the cast oil pan. This would not fill the trans rear axle with engine oil though it would just leak profusely while running.

ps. Can you post pics of the engine from both sides/ maybe someone has modified it in some way with a vent hose drain or some other way.

The Shanghai 495A engines vent any crankcase pressure /blow by through the oil fil cap that is on the right side of the engine front cover. The cap should have a wire mesh inside and vent freely to atmosphere

2nd ps . there were a few different power steering options on these tractors, mine has the power assist which works like a massey Ferguson has manual steering with an assist ram on the left side of the engine oil is in a small tank under the rear of the fuel tank left side.

The Full power steering unit had a pan that may be part of the engine oil pan??

so maybe that is it

I only saw a drawing of this system though.

 

[Bob Rooks]

You should have an inspection cover on the side of the clutch compartment. Remove it and see if it's oily inside. That will reveal your next step.

 

[Horseshoe#2]

Thanks so much will pull the cover and check that and get pics as soon as I can and let you all know.

 

[kinglouie63]

I just bought a rhino 552 tractor. After running it for a short time it is pumping all the engine oil into the hydrolics tank in the rear. What could cause this ?

Engine oil can enter the hydraulic system via the hydraulic pump’s input shaft seal. The input shaft is common with the suction side of the hydraulic pump. Under higher flow situations the shaft seal is allowing oil into the pump. Normally the complaint is noise or foamy oil as the seal allows air by thus causing cavitation. In your case there must be enough oil at the seal to cause your problem. Good luck.

 

[Horseshoe#2]

Thank you

 

[Bob Rooks]

Engine oil can enter the hydraulic system via the hydraulic pump’s input shaft seal. The input shaft is common with the suction side of the hydraulic pump. Under higher flow situations the shaft seal is allowing oil into the pump. Normally the complaint is noise or foamy oil as the seal allows air by thus causing cavitation. In your case there must be enough oil at the seal to cause your problem. Good luck.

Your speculation is flawed because the timing gear case where the hydraulic pump is attached is only splash lubricated. There is no engine oil pressure against the pump shaft seal. The drive and driven gears share the ports equally in this style of pump.

 

[Bob Rooks]

What happens when pumps blow the shaft seal when deadheaded is that hydraulic pressure flows back between the gear ends and end housings. Sometimes if there is enough restriction the pump housing will fail open.