ST-824 impeller problem. Stuck solid. - Snowblower Forum : Snow Blower Forums
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post #1 of 21 Old 01-22-2018, 11:57 AM Thread Starter
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ST-824 impeller problem. Stuck solid.

Long story shortend .........


Climbed a steep snowbank with my ST-824. The front bucket took in too much snow and I ended up pushing snow rather than blowing. I started rocking the machine up and down which helped to spit out short blasts of snow. While on a 45* angle, the rod that runs down from the impeller engagement handle dug into the ground. The machine went forward up the snowbank and the rod became severely bent. This caused the spring and chain, that connects the end of the rod to the lever system, to fly off into the snow. I found those parts after I realized I had a damage problem with the bent rod.


Took the machine into my shop, straightened the rod, replaced the spring and chain and all looked well. When I try the blower out on a test run the impeller will not spin. I can smell burning rubber. If I reach down into the chute, with the blower turned off and not running, I can not move the impeller. It is solid with no play.


The compound levers, that the chain and spring hook on to, seemed OK before I replaced those two parts. I does seem obvious to me that I have jammed something solid. Tomorrow I will tip the blower up on the bucket, remove the inspection cover and take a look.


Any ideas on what is jammed and causing my locked up impeller problem?


Should I be able to reach down into the chute and move the impeller by hand, when the blower is simply sitting quiet? It seems to me that without engaging the impeller, by pushing down the engagement lever on the right hand grip, it should freewheel.


Thanks in advance.


Dan Miller


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Last edited by Lockfortyfive; 01-22-2018 at 12:00 PM.
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post #2 of 21 Old 01-22-2018, 12:27 PM
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Did you thaw it out, could be just frozen solid

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post #3 of 21 Old 01-22-2018, 12:29 PM
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Quote:
Originally Posted by Lockfortyfive View Post
Long story shortend .........


Climbed a steep snowbank with my ST-824. The front bucket took in too much snow and I ended up pushing snow rather than blowing. I started rocking the machine up and down which helped to spit out short blasts of snow. While on a 45* angle, the rod that runs down from the impeller engagement handle dug into the ground. The machine went forward up the snowbank and the rod became severely bent. This caused the spring and chain, that connects the end of the rod to the lever system, to fly off into the snow. I found those parts after I realized I had a damage problem with the bent rod.


Took the machine into my shop, straightened the rod, replaced the spring and chain and all looked well. When I try the blower out on a test run the impeller will not spin. I can smell burning rubber. If I reach down into the chute, with the blower turned off and not running, I can not move the impeller. It is solid with no play.


The compound levers, that the chain and spring hook on to, seemed OK before I replaced those two parts. I does seem obvious to me that I have jammed something solid. Tomorrow I will tip the blower up on the bucket, remove the inspection cover and take a look.


Any ideas on what is jammed and causing my locked up impeller problem?


Should I be able to reach down into the chute and move the impeller by hand, when the blower is simply sitting quiet? It seems to me that without engaging the impeller, by pushing down the engagement lever on the right hand grip, it should freewheel.


Thanks in advance.


Dan Miller


.
If you are smelling burnt rubber that is most likely a belt problem.Might just have smoked the impeller bearing also.

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post #4 of 21 Old 01-22-2018, 12:30 PM
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Is the machine stored outside? Is it possible the impeller or auger are frozen (as in with ice, not "frozen" like a stuck bolt)?

It should be possible to turn the impeller with the engine not running, but there will be some resistance as there's a brake that engages when the lever is released.

I think the best bet would be to bring the machine into your shop and remove the belt cover. Then operate the auger drive handle, and see if the levers on the back of the tractor move when you do that, and that the idler applies tension to the belt when the handle is squeezed, and releases tension when the handle is let go. Also of course inspect the belt itself.

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post #5 of 21 Old 01-22-2018, 01:07 PM
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Try Turning the impeller by hand. If it is Stuck, Place a 2x4 in the chute resting on an impeller Blade. Hit the 2x4 with a large hammer until it Frees up. Then Try to operate it.
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post #6 of 21 Old 01-22-2018, 01:49 PM
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Jackmels has tons more experience than I do, so take my comment for what it's worth (hint: mine is free).

But if it were me, I would start by removing the belt cover and looking inside. Then, preferably, warming the machine so it can thaw, in case it's an ice problem. I'd do those before resorting to whacking it with a hammer.

Without knowing *why* it won't turn, hitting it might simply cause additional damage. And the other steps (thawing, etc) don't require a lot of time or effort, assuming you can bring it someplace warm.

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Last edited by RedOctobyr; 01-22-2018 at 02:23 PM.
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post #7 of 21 Old 01-22-2018, 02:33 PM
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use heat gun/blow dryer to melt any ice and frozen snow in the impeller housing and the auger housing.
next is a seized impeller bearing but not likely to keep shaft from turning when auger lever is engaged

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Last edited by vinnycom; 01-22-2018 at 02:37 PM.
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post #8 of 21 Old 01-22-2018, 02:40 PM
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This sure sounds like it is iced up. I have never seen snow (where I have lived) that could completely obstruct the bucket, and that tends to tell me it must have been pretty sloppy . . . and since you could not clear it due to the faiure, I'd look at frozen solid first were it me.
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post #9 of 21 Old 01-22-2018, 02:59 PM
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They will wedge tight if you let your auger bearing get to the point where the cage holding the balls in place go to crap.
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post #10 of 21 Old 01-22-2018, 03:02 PM
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Do you mean the bearing(s) in the gearcase, or the one supporting the shaft between the impeller and the pulley?

It always seemed to me that if the latter bearing seized, it would just spin in the housing... it's not held that firmly. But I've never experienced it so I can't say for sure.

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