I have a 1989 Aircap 21 inch snow thrower that needs the rubber spirals for the auger replaced. Each spiral has about 6 screws and a pin like mounting piece. The screws come out easily but I haven't figured out how to remove the pin. I've tried (gently) to pry it out but it doesn't want to move and I don't want to break something. I would appreciate any information as to its removal.

Look on this page http://www.nuttybolts.com/catalog/index.php?cPath=1733 and see if you can identify it as a roll pin (spring pin), dowel pin or cotter pin?

Also, if you can post a full model #.

Posting a picture would be great too. Use go advanced/manage attachments.

Based on this, they could be riveted: Similar questions with less expensive options replacing snow blower auger impeller paddles repair shop

That would make a lot more sense to use a couple of rivets and some screws.

It is model #PJ602/8431. The picture is the front side. The back does look as though it might be a rivet. If so, how does one remove a rivet?

Yep, looks like a rivet. In fact, it almost looks like the classic Pop Rivet.

They don't remove well. Or should I say, they are time consuming to remove.

First material, Aluminum, steel or stainless?

My guess, Aluminum.

They come in standard sizes 1/8" is a common diameter. These are designed to go into a 1/8" hole.

They are available in various lengths.

Take a look here: Blind POP Rivets | Emhart.com

The tool to set them is fairly inexpensive and you can get small packs at a local hardware store.

What isn't shown is a precision washer that CAN be used for thin materials.

In general, they are drilled out with a drill slightly smaller than the hole that they are inserted into.

Sometimes they drill cleanly and sometimes they do not.

So, cutting, sawing and a Dremel tool with some Vise grips can be used.

This is a poor man's way: YouTube - Pop Rivet Removal

This looks too easy: http://www.youtube.com/watch?v=LDQ-wnACGGs

Thanks for the advice. I'll give the drill method a try. I guess my only question now is: why was a rivet even used on an item that will eventually need replaced? Especially given that it also had the self tapping screws. Seems like overkill.

Hi,
The rivet was used to try to prevent mechanical loosening of the screws during use. It can also be a quick fastening technique for assembly during manufacture.
Peace,
Clarke