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post #1 of 19 Old 12-10-2017, 03:07 PM Thread Starter
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Auger won't stop turning

I've run into an odd problem with a friend's Cub Cadet 528. It's about a 2010 vintage.

I know it's an MTD product, and I've worked on a few of them. Pretty simple machines overall, but this is baffling.

Back in the spring a I did a complete PM following the factory service manual. He'd never done one, although he had replaced the auger drive belt. In addition to the PM, I replaced all of the springs for the auger as they were pretty rusted. He also had a couple of bent auger blades, so I took the auger apart and replaced those along with the skids and scraper plate.

So, a PM plus a number of repairs.

One thing I noticed during the work was that the auger drive belt was very sloppy and that seemed to slap agains the plastic cover over the drive pulleys. I checked the belt part number and it's correct, weird as it seemed.

I put it all back together and everything worked. The weird thing is that even when the augur handle is released, the auger still turns. It turns slowly, and it will stop if it's run into some snow. My friend insists that it has done this since the belt was changed, so I'm reasonably sure it wasn't anything that I did.

I've looked at everything I can think of. Other than separate the auger unit from the drive (which I won't be able to until spring), I can't think of anything else that I can check.

Is it possible that the auger drive pully (the large one) has a rough enough surface that it's still grabbing the pulley when it's released?

I should mention, that I loosened the auger cable, actually I took it off, to eliminate adjustment.

So, two questions.

1) Is it normal for the drive belt to be so sloppy when not engaged that it slaps the plastic cover. Slaps it hard enough that it chews up the inside of the cover. That doesn't seem right to me and I've never seen it with the Troy Bilt machines that a neighbor has that I've also worked on.

2) What the heck is causing the auger to keep turning when the belt is supposed to be disengaged?

Thanks.
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post #2 of 19 Old 12-10-2017, 03:36 PM
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The auger belt should be very tight when engaged. Your belt is too too long. Check the pathway that it's correct and the idler pulley. I find one problem, people have a 3/8" wide belt rather than a 1/2" belt. The 3/8" belt sits down in the pulley and grabs, engages.

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post #3 of 19 Old 12-10-2017, 04:15 PM Thread Starter
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Thanks. I'll have to re recheck the belt. I have the correct part number and my recollection is that the one on there was the correct one, but maybe not.

The part number I've seen is 954-04050A.

The belt is actually pretty tight when engaged, but very, very loose when released.


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Originally Posted by JLawrence08648 View Post
The auger belt should be very tight when engaged. Your belt is too too long. Check the pathway that it's correct and the idler pulley. I find one problem, people have a 3/8" wide belt rather than a 1/2" belt. The 3/8" belt sits down in the pulley and grabs, engages.
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post #4 of 19 Old 12-10-2017, 05:14 PM
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As for the augers still turning, There is a brake of sorts in there someplace that when not engaged presses against the pulley to stop it from spinning, Usually attached to the engagement pulley that tensions the belt.

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post #5 of 19 Old 12-10-2017, 06:19 PM
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Originally Posted by Dauntae View Post
As for the augers still turning, There is a brake of sorts in there someplace that when not engaged presses against the pulley to stop it from spinning, Usually attached to the engagement pulley that tensions the belt.
I think that worn brake material is a good point. The brake is intended to stop the impeller/auger pulley from turning when the clutch is released and the brake material snaps against the pulley to stop it. Probably the belt tensioning pulley adjustment has been slackened off to help prevent the auger from turning and now the too loose belt is jumping when the belt tension is released by the clutch and hitting the belt cover. The brake should apply and stop the auger from moving in just a few seconds. The brake can be replaced.

Good luck.

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post #6 of 19 Old 12-10-2017, 06:43 PM Thread Starter
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Thank you! That makes sense as there is a piece at the opposite end of the augur idler pulley bracket. I thought that was part of the mechanism to keep the belt on when the auger was disengaged. Now that you've pointed it out, it might be the brake.

The first thing I'm going to look at is the positioning of the spring that is supposed to pull that back into place when the auger lever is released. That's one of the springs that I replaced, but maybe it's not positioned correctly and isn't putting enough tension on the bracket to stop the augur.

Definitely worth looking at before I break the machine in half to get at the auger pulley.

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Originally Posted by Town View Post
I think that worn brake material is a good point. The brake is intended to stop the impeller/auger pulley from turning when the clutch is released and the brake material snaps against the pulley to stop it. Probably the belt tensioning pulley adjustment has been slackened off to help prevent the auger from turning and now the too loose belt is jumping when the belt tension is released by the clutch and hitting the belt cover. The brake should apply and stop the auger from moving in just a few seconds. The brake can be replaced.

Good luck.
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post #7 of 19 Old 12-10-2017, 07:14 PM
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Loosen the Cable that Tensions the Auger Belt a Bit.
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post #8 of 19 Old 12-10-2017, 08:14 PM Thread Starter
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I'll try that as well, however my recollection is that last spring when I was first trying to sort this out, I took the cable completely off.

The ideas here give a few things to look at. These machines aren't that complex that this should be a huge mystery. Still, it's a PITA.

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Loosen the Cable that Tensions the Auger Belt a Bit.
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post #9 of 19 Old 12-06-2019, 04:00 AM
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Originally Posted by GaryS View Post
I'll try that as well, however my recollection is that last spring when I was first trying to sort this out, I took the cable completely off.

The ideas here give a few things to look at. These machines aren't that complex that this should be a huge mystery. Still, it's a PITA.

I know this is old, but did you resolve this?
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post #10 of 19 Old 12-06-2019, 09:46 AM
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@Chuck,

GaryS posted these questions 2 years ago, and nothing since.

It is safe to say he moved on . many people dabble in trying to fix there blowers, come here and ask a question, and then never respond back with an outcome and move on.
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