I have a 513 Rotary Cutter that needs a new gearbox (or repair this gearbox). I've found some aftermarket boxes out there that will fit with a driveshaft/slip clutch replacement, but I would like to find a direct fit (or may...yeah I'd do it... modify a gearbox to make it work).
this gearbox has a groove in the input shaft, around the shaft, where a bolt goes in the slip clutch coupling. This is so the the slip clutch/drive shaft doesn't fall off if the shear pin breaks. I'm not easily finding a box with this groove in it. Most of them I have look like they take a snap ring in the end of the input shaft or something ?? or they are a splined shaft with the groove (not smooth with groove).
I didn't get the best pics, but anyone have any suggestions? I have access to a machine shop, and I'm pretty sure the tool and die makers would jump at a chance to modify a brand new input shaft. lol.