Re: Hydraulic floor jack won't maintain height
How would/could the fluid get dirty?
I have an old big, heavy cast iron one I bought in the seventies at Montgomery Wards. The check valve would be in the pump assembly/fluid tank.
I've had a bad leak years ago from the pump and got parts from a local hydraulic repair company. A friend at work that use to work sent me there, I mentioned his name and got the parts for free! I get a few drips every time I use lately.
The worst part was the pump assemble just screws in. A large hex, very thin and sits in a pocket. It's a few inches long but no deep well would work so I bought the cheapest deep well I could find, cut it in half and welded a section of pipe in. Special tool now!
'09 Ford Escape Limited, V6, 4WD