Help Identifying Tiller

[BodeMiller]

New update. Removed the chain drive cover. It’s not the gear slipping, I think the shaft may have snapped. My thought is still shear pin but I can’t find one. Also, no part numbers on the gears.

 

[paulsharvey]

I'm guessing a piece of keystock that connects the sprocket to the shaft


Edit: NVM on keyway, j see the sprocket splines to the shaft. That top one, the wear doesnt appear centered on the female spline though

 

[paulsharvey]

So, now, try rotating the shaft by hand, and see if the top axle turns? Then rotate the tines, and see if the bottom shaft rotates

 

[paulsharvey]

Just looking at the picture, it looks like a lot of wear at top male spline, and a wallered out female.

If it was Mine, id look at just two small tack welds to keep top sprocket firmly attached to the top output shaft?

 

[paulsharvey]

Im 90% sure the noise is the top sprocket slipping on the top output shaft, just from pictures of the wear.

It kinda looks male and female both have wear, so maybe? Just a tighter female (lot cheaper/easier), would fit snug for another couple decades on the worn male shaft.

Failing that, tack welds, or a soft metal, like copper, couple thin strips, and press (hammer) the sprocket back, and the copper engraves both splines and removes any slop

 

[BodeMiller]

When I spin the lower spines the tine shaft doesn’t move. That’s where the noise is as well. My guess is the the shaft broke inside the circle here. I have no idea how this is all connected though. It really seems like there should be a shear pin here somewhere, which could be the problem. I just can’t find one. Also, have a video but don’t know how to post it.

 

[TractorTech]

A shear pin is going to be on the center gearbox input shaft holding the driveline to it.
You would have to remove the rotor bearing holder bolts on both sides of the tiller. That should give you room to wriggle the rotor shaft out of the tiller. Unless there is a stub shaft in the rotor drive end that sheared, it is probably the splined shaft that broke.

 

[BodeMiller]

Well found the issue. Driveshaft break right behind the spline. Still trying to find the brands. Also, think this is weldable?

 

[BodeMiller]

 

[paulsharvey]

Hmm... weldable yeah, but the problem is you almost need a lathe to turn the welds down to fit in the "axle" tube. This might be a "career ending injury" for the tiller. If you can find the shaft, its not going to be a cheap part.
Also, that took some Force to sheer like that, and the weld is going to need to be done right to last.