auger belt vibrating/flapping - Snowblower Forum : Snow Blower Forums
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post #1 of 27 Old 11-24-2019, 06:54 PM Thread Starter
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auger belt vibrating/flapping

Hello, I have a troy bilt 2410 snow blower. Model 31AS62N2711. Bought used.
The issue is - when the engine is idling and the auger is disengaged - the belt vibrates/flapping really bad on the opposite side of the idler pulley. I adjusted the belt tension to various tensions - too loose, too tight, and just right - but it vibrates/flaps all the time. I also moved the idler pulley to a tighter setting but it did not work.
The belt is new part #754-04050A. It says that this belt replaces (or is the same as) the proper number which is #954-04050A - but I am not sure. It seems the belt is too long...??

Questions - Other than the belt, what can cause this? The new belt is a V-belt - Should it be a clogged belt?
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post #2 of 27 Old 11-24-2019, 07:00 PM
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Does that machine not have belt guides, as all my machines have?

I use the Gates Power Rated Green .. ?

Last edited by oneacer; 11-24-2019 at 07:03 PM.
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post #3 of 27 Old 11-24-2019, 07:26 PM Thread Starter
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No. It uses the head of a bolt (as a damper?) - and a bracket attached to a spring to kinda guide the belt in the pulley. The only guide for the belt is the actual pulley's V.
A belt guide where my belt is vibrating seems to make sense - but there is none.
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post #4 of 27 Old 11-24-2019, 07:33 PM
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I am wondering if someone removed it, and never put it back. Does the schematic show one?
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post #5 of 27 Old 11-24-2019, 07:47 PM Thread Starter
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Where would the guide be?
This is my first snowblower - but I am pretty good at mechanical stuff. Seems someone did remove something...Just not sure..
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post #6 of 27 Old 11-24-2019, 08:46 PM
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Welcome to SBF tjoyce81. I don't see any auger belt guide in the service manual. If the belt is new and has no nicks or cuts, you could possibly have an auger pulley that is slightly bent and catching the belt causing the flapping.


Service manual for MTD machines-


http://service.mtdproducts.com/Train...owthrowers.pdf

Toro 8/24 (38080) 1989
Toro 721-QZR (38743) 2015 (Hemi Predator Power)
Toro (51984) Hand Held Blower (For the light stuff)

Experience is something you don't get until just after you need it.
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post #7 of 27 Old 11-25-2019, 02:19 AM Thread Starter
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Thanks for the welcome. I will check the auger pulley, but this only happens when the auger is dis-engaged. When engaged it runs perfect - smooth and strong... I slid the belt off the auger crank pulley and ran the engine. The auger drive pulley (on the crank shaft) looks good and runs just as smooth as the drive crank pulley.
A miss-alignment makes sense so will check closely...
I do see a belt guard in the service manual - thanks a lot for that! On page 7, figure 2.2. There is not one on my machine - but I did buy it used and it could have been removed.

Wondering on the belt. Does anyone know the difference in a mtd-954-04050a and a mtd 754-04050a? if any? Is there a slightly shorter belt for these machines? I see a mtd-954-04050 (no letter 'a')...?
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post #8 of 27 Old 11-25-2019, 02:23 AM
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Quote:
Originally Posted by tjoyce81 View Post
Thanks for the welcome. I will check the auger pulley, but this only happens when the auger is dis-engaged. When engaged it runs perfect - smooth and strong... I slid the belt off the auger crank pulley and ran the engine. The auger drive pulley (on the crank shaft) looks good and runs just as smooth as the drive crank pulley.
A miss-alignment makes sense so will check closely...
I do see a belt guard in the service manual - thanks a lot for that! On page 7, figure 2.2. There is not one on my machine - but I did buy it used and it could have been removed.

Wondering on the belt. Does anyone know the difference in a mtd-954-04050a and a mtd 754-04050a? if any? Is there a slightly shorter belt for these machines? I see a mtd-954-04050 (no letter 'a')...?
That's just an updated number, its the same belt. MTD changed the numbering system from the "7" prefix part number to the "9".
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post #9 of 27 Old 11-25-2019, 08:56 AM
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Quote:
Originally Posted by tjoyce81 View Post
Thanks for the welcome. I will check the auger pulley, but this only happens when the auger is dis-engaged. When engaged it runs perfect - smooth and strong... I slid the belt off the auger crank pulley and ran the engine. The auger drive pulley (on the crank shaft) looks good and runs just as smooth as the drive crank pulley.
A miss-alignment makes sense so will check closely...
I do see a belt guard in the service manual - thanks a lot for that! On page 7, figure 2.2. There is not one on my machine - but I did buy it used and it could have been removed.

Wondering on the belt. Does anyone know the difference in a mtd-954-04050a and a mtd 754-04050a? if any? Is there a slightly shorter belt for these machines? I see a mtd-954-04050 (no letter 'a')...?
954 is the new belt there is no difference , mtd dose this all the time old number 754 new number 954 ,
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post #10 of 27 Old 11-25-2019, 09:15 AM
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Maybe a belt guide was omitted in the design, and should have been one in place … ?

I believe all my blowers have some sort of belt guide setup, which prevents belt slack flap as well as keeping it from popping off.
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