Hydraulic questions on Zetor 5211

Price was right so I bought it.. Now trying to figure out some things--#1 dual hyd lift levers..Per book the inner one(closest to seat) is suppose to lift and lower the implement---Inner one seems to do nothing --the outer one lifts and lowers the implement--reckon something is plumbed backwards???If I understand it right, the outer one is suppose to work external cylinder such as the one on the heavy box blade I got with the tractor.....Going down the road to bring it home, it would constantly lower itself about 10" then raise back up...any enlightenment on the two levers and the lowering and raiosing on its own?????? Also, what is the deal with the D, M, P lever down by the hyd lift levers? It is currently set on "P". and will not move.I simply want to use a bush hog behind it right now...Any enlightenment on this?? Thanks

Hi
The lever nerest to seat is remotes. The one closest to fender is trepointlift.

Thanks I knew my three point lift was operated by the one closest to the fender....Where do I check the hyd. fluid level? Got to figure out why it goes down then up then down then up on its own when transporting the heavy back blade.

....because the main 3pt mlift piston seal is leaking... my 3011 is doing it pretty badly, but as soon as i have time it 'll get fixed...

How hard is it to fix the main piston seal? Thanks

depends if you have a motor hoist or a forklift, the 3pt hitch cover is very heavy, and its easy to bend the levers on the underside if you dont lift it up before pulling it towards you when standing on the back. Even with two pair of hands.