I've got a1020 with some Hydrolic issues. The lift won't raise unless you turn the steering wheel. As long as you hold it in place and don't move it will work fine but as soon as you turn the wheels it won't raise until you turn the steering wheel. It sounds like something leaking or bypassing in the column. I put new o rings in the housing and didn't change anything. Acts like the shaft isn't centering or going back to natural i guess . What on these is sopossed to center the valve when you let go of the steering wheel? It doesn't have the big spring at the top like the later models do. If anyone can help or tell me what takes the place of it and centers it back on these I would appreciate it..!!