The Stovebolt Site Forums The Parking Lot Big Bolts Filling hydraulic hoist reservoir correctly on 2tn

I got a 1957 2ton Truck with a St Paul Model AH160 Box hoist. The seal leaks abit and I need to top off the reservoir . My question is how do I do this correctly? Do I rasie the hoist all the way and fill it or do I leave it down and fill it? Do I need to bleed it? If so how do I? The hoist does go up about 75% of the way right now. HELP ME PLEASE!

thanks!