I bought all the major hydraulic parts from northern tool and tractor supply for phase two renovation of my bender. I had no, I mean absolutely 0 hydraulic experience prior to this build. I had to learn quick in about a week because I was set on doing the conversion! Thanks to help from the internet I was able to pull it off. The new setup uses a 2500psi 2.5" x 24" double acting cylinder powered by a 2 stage 11GPM hydraulic pump. I fabricated a plate to couple the pump to a new 2hp electric motor, then install a 4 way control valve and separate fluid reservoir. I chose not to go the easy way out!...no pre-assembled power units for me that would be too easy. Plus the performance I get from this system far exceeds others.
I started off by building a drop sub frame/cradle for the 24" hydraulic cylinder. The trick was installing the cylinder at just the correct angle and distance up on the swing arm to make the most degree of bend in one stroke. My new setup does about a 115* bend without having to pull the pin and reset it in the swing arm...vs the air/hydraulic plans which only allow a max bend angel of about 60* without repining.
I also built a cart for the bender and installed casters to roll it around the shop. I then fabricated a frame for the control panel which contains the 4 way control valve, hydraulic pressure gauge, 115v hour meter, and on/off switch for the electric motor. The fluid reservoir is going to be mounted up front in the square opening under the swing arm. The most difficult part was finding all the different fittings, elbows, and adapters. They add up and get expensive quick!