Hydraulic oil leaking from rear jack

[fre1fred2]

I was leveling my 2017 3950BR in manual last night and the drivers side had to be raised more than the opposite side. Camper tire were almost off the ground on the drivers side to get level. In this position, the rear jack had hydraulic oil coming from top area of jack (pretty heavy flow). After I lowered the rear to relieve pressure, leak stopped. What would make it do this?

[dieselguy]

Loose fitting, bad hydraulic hose, cylinder seal ....

[Beau2010]

As DG says, could be any of those and most/all are not fixable. Replace jack is only option AFAIK.

[fre1fred2]

Found the leak, it was actually the plug/screw on top side of the jack. I took it out and the o-ring was pinched and the base of the screw is abnormal. I fixed O-ring and reinstalled and no leak. But I still need to get a new plug/o-ring as insurance. Does anyone happen to know the part # for that plug? BTW...couldn't level my camper with this leaking...would only hold pressure for about 10 seconds..