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Hello,

Yesterday we had a very wet heavy snow and partway through the impeller stopped working. I thought at first that I had broken the square key connecting the pulley to the impeller shaft but the impeller spins freely on the shaft. I think I need to replace the roll pins that secure the impeller to the shaft but they don't appear in the parts diagram that I usually use.

https://www.partstree.com/parts/murray/snow-blowers-snow-throwers/536-881800-craftsman-27-dual-stage-snowthrower-2004-sears/auger-housing/

What kind of pin is this and where would I get one? Could I just use a good hex bolt there instead?

Thanks for the help.

LMHmedchem
 

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Discussion Starter #2
After a very long tie searching I found this parts diagram that gives the part number for the roll pins,

https://www.ereplacementparts.com/craftsman-536881800-snowblower-gas-parts-c-158286_160975_173948.html

Craftsman STD572512
https://www.ereplacementparts.com/pin-2pk-p-965295.html?osCsid=79gbpgbfc46bsrvrrbst2b4fr3

It is a bit silly to charge $9 for these. I am sure this is a $2 item at a hardware store if you know the specifications. I will try to put these in and report if they fit or not. I have had more and more trouble ordering Craftsman replacement parts that end up not fitting my model even though they are listed as the correct part.

LMHmedchem
 

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You might want to try a local hardware or big box store first to see if you can get something local instead of having to pay shipping. Snowblower repair shop or dealership too even if it's another brand.

STD572512 - -> 1-1/4" long x 1/4" diameter.

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STD572512 - -> 1-1/4" long x 1/4" diameter.
Do you know what kind of steel these are, meaning do they come in different strengths? I presume they are not stainless, or even very high carbon since they have to be bent into place.

I was going to try to take one out to have a look but it has been low single digits here with a windchill in the -20 range and I don't have a garage. It will have to wait until the weather is a bit more reasonable.

LMHmedchem
 

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I can't say about the kind of steel. I've never seen any options on grade of steel in a roll pin. I would think one is as good as another and should shear before doing any major damage to an impeller.
There might be roll pins out there that are stainless and used in something like the food industry or something but I can't say I've ever run across any.
You should be safe using any 1/4" pin you can find. I wouldn't even be that picky on length if you can only find ones longer. If they stick out some, who cares. Might actually make it easier getting them in. :grin:

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Do you know what kind of steel these are, meaning do they come in different strengths? I presume they are not stainless, or even very high carbon since they have to be bent into place.

Roll pins are a high carbon 1095 steel. The pins are available in stainless steel but are almost half the strength as 1095 steel. Any hardware or big box store would have these.


https://www.engineersedge.com/roll_pin.htm
 
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