B7200 gurgling fluid from rear end

[das fisch]

I have a older b7200 hydro that works well for its age. After running it the last few days to move a bit of snow and putting it in the barn as soon as I turn it off it makes a small gurgling sound and a bit of fluid is expelled from the top of the rear end, directly underneath where the top hitch for the 3pth mounts.
It is not a lot of fluid, dark in color. I changed all the hydraulic fluid this summer and do not use he tractor a whole lot.
The loader has a small leak from one cylinder seal, and operates a bit slow but nothing crazy.
I've searched a bit but haven't found much.
Any info would be helpful, I want to solve this before it causes any big issues.
Thanks

 

[North Idaho Wolfman]

Under the seat is a vent, if it's partially plugged it can burp fluid, check for blockage.

Another option is either overfilled or has contaminated fluid. Water/ contamination in the fluid will cause it to foam up.

If the hydraulic pump is sucking air it will also cause the fluid to foam and them purge out of the vent.

 

[das fisch]

Thank you for the reply. I'll check that vent. Would the small leak at the front bucket cylinder introduce enough airto foam up? That might explain the slow fel response as well, correct?

 

[North Idaho Wolfman]

Thank you for the reply. I'll check that vent. Would the small leak at the front bucket cylinder introduce enough airto foam up? That might explain the slow fel response as well, correct?

No the leak on the cylinder will not induce air, But a leak on the suction line will.
Look at all the suction lines (in yellow) for wet spots, or seeping leaks.

 

[das fisch]

Thanks again for your help thus far. I will check the suction lines as you stated.
I did have a chance to check the plug under the 3pth top link mounting plate, small black plug with a small channel up one side. The channel was free and it fit snugly into the hole. One thing I did notice, when in run the tractor and operate the FEL or 3pth there is no leakage from the plug. If I shut the tractor down and either leave the bucket up a hair or barely set it down there is no leakage. But if I shut the tractor down and the operate the loader controller to, at least what I thought, relieve the pressure and push forward as to lower the loader more this is when the gurgling and leakage happens. It appears to be frothy coming from the plug but settles back to normal fluid quickly.
Not sure if this helps. Also appears the fluid level might be a bit high on the dip stick checked after a short warm up.