I ended up with this old sprayer from a guy who sold produce out of his place for years,  but had passed away.  It has John Deere name on it ,  a 18 gal tank and the pump is belt driven by a Briggs 3hp motor,  I believe the pump is  shot.  Also has a recoil hose assembly mounted on the front with a brass wand,  has a short tongue for pulling with a tractor and has 3 wheels .  1 pivot in the front and 2 8" wheels in the rear.  Would like to see if I can get more information on it ,  like maybe pump output so I can replace the pump with something the Briggs small motor can operate. Any info is appreciated. Checked at the John Deere website,  but no luck.