Folks,
I need some advice on how to weld or otherwise repair the hydraulic pump in the attached photo. It came off of an old tow truck's hydraulic system and was made by Eaton. A guy who lives near my shop asked me to weld it. It was welded once already, and if you look at the weld, you won't be the least bit surprised that it did not hold. I haven't been able to determine the exact type of metal it is. The inner part of the pump appears to have been cast, based on the texture of the surface. I would guess it is cast steel. I've never actually seen the crack as it's buried under the poorest weld bead I've ever seen.
I have mig, tig and oxy-acetylene equipment on hand, but am at a loss as to the best procedure. Any thoughts and guidance are appreciated.
Hydraulic Pump.jpg