Warped craftsman auger pulley - Snowblower Forum : Snow Blower Forums
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post #1 of 17 Old 01-29-2015, 05:02 PM Thread Starter
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Warped craftsman auger pulley

Hi,

A neighbor dropped off a craftsman 536.887992 to me the other day with two sheared impeller roll pins. When I took it apart, I noticed a severely warped auger pulley that also had a dent in the edge causing the pulley to pinch the belt in that area.

I figure that this may be what caused the roll pins to shear as this would likely keep the belt from slipping and thus when the impeller was over loaded, the pins were the weakest point.

I replaced the pins and have a pulley and belt on order but was wondering what could typically cause such a severe warping of the pulley. I want to not only fix the problem but prevent it from happening again.

Thanks
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post #2 of 17 Old 01-29-2015, 05:43 PM
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Maybe someone once tried to pry it for some reason, with a pry bar ?
Is he the original owner?

Do you have a picture?

I hate shoveling SNOW!
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***********************
Craftsman #536886141(Around 2000?)
5 Horse, Tecumseh HSSK50-67392S
22" Dual Stage
***********************
"Classic" 1963 S-226 Snowbird
4 Horse (orig) Briggs & Stratton#6305201
22" Dual Stage
***********************
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post #3 of 17 Old 01-29-2015, 05:58 PM Thread Starter
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That's what I thought. When I pulled it off, it came off like butter. He said he's had it serviced once by Sears. I figured if they wouldn't do that but what do I know? It totally looks like someone tried to pry it off with a bar or something but I figured Sears would have a better method for their own machine.
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post #4 of 17 Old 01-29-2015, 06:17 PM
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You have this?

CRAFTSMAN SNOWTHROWER GAS Parts | Model 536887992 | Sears PartsDirect

I think if something jammed, the belt would give before the pulley?
To "warp" the pulley. I would think someone tried to pry it at one point.

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***********************
Craftsman #536886141(Around 2000?)
5 Horse, Tecumseh HSSK50-67392S
22" Dual Stage
***********************
"Classic" 1963 S-226 Snowbird
4 Horse (orig) Briggs & Stratton#6305201
22" Dual Stage
***********************
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post #5 of 17 Old 01-29-2015, 06:25 PM Thread Starter
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I agree. I was having a hard time believing that someone, with supposed expertise, would do that to the pulley, put it back on and give it back to a customer. Maybe I'm just naive.

So I will replace the pulley, belt and call it a day.
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post #6 of 17 Old 01-29-2015, 06:37 PM
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I guess he is the original owner?

I hate shoveling SNOW!
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***********************
Craftsman #536886141(Around 2000?)
5 Horse, Tecumseh HSSK50-67392S
22" Dual Stage
***********************
"Classic" 1963 S-226 Snowbird
4 Horse (orig) Briggs & Stratton#6305201
22" Dual Stage
***********************
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post #7 of 17 Old 01-30-2015, 08:46 AM Thread Starter
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He is
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post #8 of 17 Old 01-30-2015, 04:40 PM
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Unless he did it somehow and is embarrassed to admit to it I guess Sears did it then?
I can't think of anything else to "warp" it?
You would think if somehow he jammed the blower up either the belt would pop or something else would break before the pulley got bent?

I can only imagine what "warped" looks like, as you posted no picture for anyone to look at.
Maybe if you posted a picture someone would see something?

The pulley in question is the #480 in the link I posted?
If so what condition was the key for it?

Here is the auger housing link, AUGER HOUSING Diagram & Parts List for Model 536887992 Craftsman-Parts Snow-removal-equipment-Parts | SearsPartsDirect

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***********************
Craftsman #536886141(Around 2000?)
5 Horse, Tecumseh HSSK50-67392S
22" Dual Stage
***********************
"Classic" 1963 S-226 Snowbird
4 Horse (orig) Briggs & Stratton#6305201
22" Dual Stage
***********************
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post #9 of 17 Old 01-30-2015, 08:14 PM Thread Starter
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You're confirming what was going through my head. I tried to bend the pinch out with a pair of pliers but that steel was tough. No way a belt incident could result in such deformation. Unfortunately, I don't have the machine here to take a picture. While we're waiting for the new pulley, he wanted the machine back to do some minor blowing, which I advised against. The pulley break makes an awful clank when you back off the auger lever. I will, however, get the machine back once the pulley comes in and I'll post a picture.
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post #10 of 17 Old 02-05-2015, 11:37 AM Thread Starter
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So I installed a new input pulley and belt. I've also attached some photos of the old pulley showing the damage and overall lack of true-ness. When I was taken this one apart I noticed scuffing on the tension pulley arm. My guess is that the pulley hitting the arm is what caused the dent.

I also noticed that when I engage the auger and watch the pulley, it appears as if the shaft is moving in and out a bit causing the pulley to move toward and away from the impeller housing in the front and the tension pulley arm in the rear.

When I had it apart, there was no play in the bearing at the housing where the shaft comes through so it seemed fine to me. Is this movement normal?

Because it appears that movement allows the pulley to come toward and away from the tension arm and may have caused the damage.

The last poster make a good point that someone may have tried to pry the pulley off but I noticed the damage is on the opposite side of the pulley, the tension pulley arm side.

Another question I had, can over tension cause the pulley to warp?

I just don't want this to happen again to the new pulley.

Thanks so much for all the help.
Lefty



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