Three part PTO hack - good solution or bad

[icehorse]

I'm borrowing a tiller and I can't get the PTO shaft off of it. I started a separate thread to get ideas about that.

But if I can't get it off I have an idea about how I could make it work:

- the shaft I wanted to use as a slip clutch, and the tiller doesn't have a clutch or a shear bolt, so I really want a slip clutch on the shaft.
- both the slip clutch and stuck shafts are the smaller of the 6-spline shafts.

So I'm thinking about cutting off the larger / wider shaft of the slip clutch PTO shaft and having it slide over both the the smaller shafts. Diagram below.
(And yes, I know how to get the lengths correct, not too short, not too long)

It feels very "hack-like" to me. Maybe it would wobble too much or have issues I haven't imagined? Thoughts? Ideas?

 

[GreensvilleJay]

Well, do NOT cut the borrowed PTO shaft ! It's not YOURS . Spend the time and get it off the tiller.
really ,lotta heat, PROPER sized tools, it'll come off

 

[icehorse]

Well, do NOT cut the borrowed PTO shaft ! It's not YOURS . Spend the time and get it off the tiller.
really ,lotta heat, PROPER sized tools, it'll come off

I had NO intention of cutting my friend's gear.

 

[North Idaho Wolfman]

The slip clutch should be on the tiller side not the tractor side.
The shaft will be too loose and floppy with the PTO shaft rigged up like that.

 

[Russell King]

There is (probably) a shear bolt at the tiller end. See the picture below for an example of what might be there.

Red shows the shear bolt. Green shows the shear plane that probably has ball bearings inside to hold it together. Yellow is the retention bolt/pin/???. The tiller would be on the left side of this picture.

 

[North Idaho Wolfman]

There is (probably) a shear bolt at the tiller end. See the picture below for an example of what might be there.

Red shows the shear bolt. Green shows the shear plane that probably has ball bearings inside to hold it together. Yellow is the retention bolt/pin/???. The tiller would be on the left side of this picture.
View attachment 171004

Shear bolt yokes go on the tractor side of the shaft not the implement side.

 

[icehorse]

Shear bolt yokes go on the tractor side of the shaft not the implement side.

Agreed, but i'm trying to hack together a solution given the constraints i have. the key constraint being that that i don't have a shaft with a shear bolt in hand. sadly

 

[icehorse]

There is (probably) a shear bolt at the tiller end. See the picture below for an example of what might be there.

Red shows the shear bolt. Green shows the shear plane that probably has ball bearings inside to hold it together. Yellow is the retention bolt/pin/???. The tiller would be on the left side of this picture.
View attachment 171004

This is really useful. If i can find a shaft with this built in shear bolt - that's also the side with the larger tube, i'd be in business.

i've never tried to disassemble / reassemble the two halves of a yoke, is that daunting?

 

[Russell King]

Shear bolt yokes go on the tractor side of the shaft not the implement side.

Interesting, mine was mounted at the tiller end. I guess the PTO shaft could be mounted either way though. I will read through the tiller manual to see what they say just out of curiosity. (I got the manual from the manufacturer after I purchased the tractor and tiller so the previous owner may have installed it backwards.)

The shear bolt on my shredder is at the implement end though by design of the implement.