Originally Posted by RWeigant
On out 2013 American Tradition. Haven't used the hydraulic jacks for 6 months until the first trip south. First stop and lowered the jacks and all went fine. When we left the jacks only came up 3". After re cycling the jacks I managed getting to not come up at all. Played around and they came up to that 3" mark again. We decided to head to our next site anyway. When we stoped I saw that the jacks were up all the way. The fluid is up to about 2" from the top. Looks like there is some oil dripping along side of the tank and down to the street flap. Nothing else works on hydraulics but the jacks. Called a guy and he said to clean the wet tank and try and see if I can find a leak. Afraid to lower them again.
Sounds like the breather is clogged. Assuming single-acting jack system, with spring return, having them down a long time allows air pressure inside the tank to eventually get to atmospheric, but retracting them will require time for the air to get pushed out, which may explain why they eventually came up.
If the tank is readily available from above (as opposed to under the coach), next time they donít come up all the way, try cracking the filler/breather open and see if air comes out and the jacks go up. A partially clogged filler/breather can also explain the mess itís made.
Without a schematic, Iím just guessing, but thatís what it sounds like from here.