Bobcat 743 hydraulic pump info.

[bobby blaize]

I have a bobcat 743 I am trying to run on a 22hp Predator motor. I can't figure out the pump.

The machine was complete, but not working when I got it. The motor was shot and I was assured the tandem pump was absolutely working fine which is why I bought it. Obviously I was lied to so I ended up tearing the pump down and found several issues which I fixed (bearings, seals and wear on rotating assembly). I sanded the rotating assembly parts smooth on a flat plate and replaced bearings and seals.

I now have suction on the vane pump hose that goes to the top of the control valve assembly, is that correct? I can't get the filter or cooler to fill up. The engine rotates clockwise from the rear of the machine looking forward. I think the hose routing is correct according to the manual. I can't find a fluid flow chart for the 743 so I don't know if I should have suction or pressure from the front vane pump output. If it's suction then fluid would flow back to vane pump from top of control valve.

 

[bobby blaize]

I figured out the problem with my vane pump. It was set up for CCW rotation. I flipped the center section of the vane pump around and now I am getting pressure out of the output instead of vacuum. I am posting a video so others can learn from my experience.