Great Dane excavating co.

[Old Guy]

Cooper
Back to the 3stage cylinders, we also made a double acting 5 stage cylinder, I had 3 oil baths but got it working in the end. In this cylinder we but oil in on the small end, this was done by inserting a tube into the end you but the oil in, the tube went down to the bottom end of the small stage which had a solid piston with a hole the od size of the tube and a o-ring in the hole. This tube allowed the oil to enter the bottom of the cylinder always had the large stage move out first followed by 2cd then small stage. Now if some of you out there want a double acting 2 to ? cylinder I can supply the information, there is a trick to it, but it sure makes the dump box come down faster.

Earl