[bigmack]

Just changed the Straw Chopper rotor assembly on the R60, and the shaft, magnetic hub get major hot when running. 2 questions:
Is the chopper supposed to run all the time, even when the mill is off?
Should there be clearance between the magnetic hub and the clutch plate when it not engaged?
Any ideas why these parts are heating up? Rotor, hammers, and bearings are all new!

 

[wheaty75]

No chopper will not run all the time, buuuuuut, some people welded them together as to not fight clutch problems. Yours is hot so I suggest slippage. Is yours running all the time? Yes there should be a gape between you magnet and hub. Then when sep is engaged it is supplied with electricity pulling the ywo together then turning the chopper. Check to see what kind of voltage you have at your clutch. And get your corrct gap, just so they dont rub

 

[bigmack]

does not run when you first start the combine, but once you engage the mill, it stays on all the time.
My magnet and clutch plate constantly rub (I think the clutch plate is warped), even when the rotor is not turning. I'm thinking that is causing the shaft to heat up?
What is the correct gap?
Thanks for the info so far.

 

[wheaty75]

Somebody might have the correct gap, but I generally set it as close as I can without rubbing. Lay a stright edge on your plate, but if they are rubbing all the time you found your problem

 

[bigmack]

Thanks a million....tomorrow mornings job is now decided!

 

[hyperharvestii]

You need to have .030-.090 air gap between magnet and drive plate. Also take a test light with engine off, key on, and seperator switch engaged. Check to make sure you only have one terminal with power. If both terminals have power and one is bright and other is dim, you have a bad ground and clutch could be slipping. Shims are available to set air gap.
Hyper Harvest II