Fairey Drive Swap - IIa to III Not Good

[WilsBoar]

That might not be the case--I'm just trying to work out what would cause such a failure of the mainshaft. You'll have to determine the cause by exmining the parts in front of you.

Out of curiosity, were you able to get the end of the shaft out of the overdrive yet?

So here is the other end of the shaft that was left in the overdrive. There was also a lockwasher in the OD.

So...any thoughts? The OD spins nicely with no grinding or rattling.

Now that this is out, should I go ahead and install the Fairey to see what happens?

[SafeAirOne]

Now that this is out, should I go ahead and install the Fairey to see what happens?

Oh, wow. I didn't realize that the nut was still attached. Interesting. Maybe it's just the pic, but it almost appears as if the broken off end is a little tapered where it rode in the bearing.

I'd examine the bearing assembly that the rear end of the mainshaft rides in on the OD to make sure it is good. If it is, I'd just run it. If not change the bearing and run it.

I'm confident that beating the nut tight with a drift instead of using the proper special tool contributed to its untimely demise.

[WilsBoar]

Oh, wow. I didn't realize that the nut was still attached. Interesting. Maybe it's just the pic, but it almost appears as if the broken off end is a little tapered where it rode in the bearing.

I'd examine the bearing assembly that the rear end of the mainshaft rides in on the OD to make sure it is good. If it is, I'd just run it. If not change the bearing and run it.

I'm confident that beating the nut tight with a drift instead of using the proper special tool contributed to its untimely demise.

Well, it looks likes things may be okay from the visual inspection. I guess we won't really know until we put put some torque on it.

Here are some of the inspection photos:

[Apis Mellifera]

That looks like an old break and it doesn't look like things flopped around too much.