Installing driveline slip clutch

texbaylea · May 9, 2006

I just bought a PTO driveline slip clutch for my Bush Hog shredder. I am tired of replacing shear bolts. It came without any instructions but I have found most of what I need here on TBN.

The distance between the securing bolts on the input and the output is 5" +-. It seems logical to me that that distance is the correct amount to shorten the driveline that now fits properly.

Or __ am I missing something? /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif

Vernon

PineRidge · May 9, 2006

If it were me before the drive shaft was cut I would mount the slip clutch on the gearbox, raise the shredder so that the slip clutch is the same height as the PTO stub and take your measurement at that point. That way your drive shaft won't be bottoming out when you lift the shredder and it can't do any damage to the tractor as a result. Understand?

geneP · May 10, 2006

I say up front that I haven't seen all gearbox applications, but the ones I have seen with a shear bolt have a smooth, round input shaft to the gearbox. The slip clutch models have a splined input shaft. Do some slip clutch assemblys have a smooth bore on the gearbox side? I was considering the same thing, but didn't persue the idea.

Highbeam · May 10, 2006

Yep, the slip clutches can be had for both splined and smooth. Agri supply sells them and shows pictures. I can't imagine not having a slip clutch on the PTO shaft.

PineRidge · May 10, 2006

Try your local Tractor Supply Co. for that particular slip clutch, or contact KingKutter as that's the clutch that's on my tiller.

texbaylea · May 10, 2006

geneP

The slip clutch I got has the 1-3/8" smooth shaft input and output.

Just have to shorten the driveline the apropriate amount. The driveline now has sufficient free space so I did not think it necessary to go through the usual method to keep from getting the shaft too long.

Vernon