Picked up an old Hobart w/ Wisconsin TJD a few weeks ago. W/ the hand crank stub on the crankshaft I decided to adapt an extra compressor pump and a donated almost new 10 gal air tank. Had my local machinist bore the motor pulley to 1" w/ no keyway. I drilled a countersink in the stub for the setscrew to seat in. Built the hinged mount for belt tension and to be able to lift the pump while starting the engine. I rigged an air governor to the pump for pressure control and it seems to work OK. The binder is attached to keep the belt from jumping off if I hit a bad bump in the road. It doesn't add any extra tension on the belt. It should work great if the needle gun or chipping hammer are needed. W/ the RPM difference of 2300 on the TJD and the 3450 of the elec motor the pump is running at 66% of rated speed but I think it will make all the air I need.
You might notice there's a lawn mower air filter attached to the head as I tired yrs ago of dealing w/ the cheesy little felt filter.
Edited by ol' stonebreaker, November 21, 2015 - 10:42 PM.