Farmall Cub

Hy-pro used to make a reverse direction roller pump that we used on a cub for herbicide.I think it was made to run on a cub, but I don't remember. I plan (someday) to use a belt and pulley and mount a roller pump on a metal plate bolted to the drawbar--speed and direction problems solved and I can weld a properly bent pipe up from the plate to hold the boom valves, regulator, etc. within easy reach.

A gear type pump would work just fine, as would a flexible vane pump, as long as it was compatible with the fluid being pumped. Any pump setup should have a relief valve that is capable of flowing the maximum volume that the pump is capable of pumping. The relief should be on the discharge side of the pump, before any valve, and should be set below the working pressure of the weakest component on the pressure side of the system. Also, it would be kind of neat to use a three way valve to shut off flow to your sprayer. Plumb the second discharge back to the tank so that when you shut off the sprayer, the pump would circulate back to the tank, essentially unloading the pump while you aren't spraying. Other than that, I think that mounting the pump on the drawbar is a good idea. This would allow you to adjust the speed and direction as required, and would put the pump below the level of the tank, which would minimize problems with running the pump dry while priming. Sounds like a good project. Have fun with it.

glenn

Use somthing belt driven and just put a twist in the belt if direction of rotation is a problem.

Plus the relief valve return plumbing could be used to keep mixed chemicals in suspension.