Mystery spring
 

I'm replacing the clutch/friction disc on my 582 and noticed a spring is missing according to the Parts Tree diagram of the clutch assembly. It's #10. It looks to be a small spring. What is it's purpose?

Those are what I will call "anti-rattle springs", they go on the pins of the 3 pin driver and hook around the edges of the clutch disk, they are there to keep the pins from banging around in the holes of the clutch disk when the tractor is running in neutral or when the pedal is locked down.

They don't need to be there for proper operation of the tractor, they just help keep the holes in the disk from getting wollered out.

Did you have your pressure plates turned?

Pressure plates
 

I havent had them turned. What qualifies tiem for turning?

Those springs do work for a little time but seem to get bent and broken off and require clutch disassembly to replace. I would bet there are more tractors without them as there are with them.

You have your pressure plates turned whenever you replace the friction disc. This is similar to brake rotors, if you do not do it your friction disc will not wear evenly and you will be replacing sooner than you would like.

They get pitted and warped, they also get spots in them where they have gotten hot and become somewhat "tempered" and the tempered places will wear into the clutch disk causing grooves and the disk won't wear evenly.

In any event, turning or trueing the plates will insure that the entire surface of the plates will contact the clutch disk. This will cause a much smoother take off, more pulling power (less slippage) less clutch chatter and ultimately cause less wear and a much longer life of the disk itself.

I myself never put a clutch back together without turning the plates... then again, I never put one back together without a new shaft, throw out bearing, teaser spring, pressure spring, spiral pins and washers either, but that's just me.

I can't really speak for the other guys here about the rest of the parts, but I don't think anyone will disagree with me about turning the plates.

Clutch rebuild
 

Turning them makes sense. I checked the shaft with a known straight edge, and there was barely .001 variance and the t/o bearing is being replaced also.

Thanks for your input.

the cub dealers I deal with told me not to use the antirattle springs because they break and tear up other things like wiring harnesses

Or your do dah