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post #1 of 12 Old 12-27-2015, 11:17 PM Thread Starter
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belt blown up

Hi my auger belt blew up on my craftsman 8/25. It is a custom job so not standard Ie: new engine and pulleys. I guessed at the size of belt and failed obviously. it lasted less than 3 hrs. anyone have suggestions for the slack required for this set up. The belt is stopped when not engaged and it appears it wore through when rubbed by the still spinning engine pulley.
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post #2 of 12 Old 12-27-2015, 11:23 PM
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Posting a photo of the belt would be helpful.

If the belt fit on the machine then you likely need another 1/2". Do you have the tensioning idler backed all the way off or is there some adjustment there ??

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post #3 of 12 Old 12-27-2015, 11:41 PM
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Is it still under warranty?

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MTD....2 stage(modern 8.5 HP) not my favorite
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post #4 of 12 Old 12-28-2015, 12:45 AM
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Did you use a proper heavy duty belt or just a cheap one from a auto parts store? A high load application needs a proper lawn and garden high torque belt. The normal ones don't handle heat or shock loads.

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post #5 of 12 Old 12-28-2015, 06:28 AM
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You can get lawn and garden belts at automotive stores but it needs to be a lawn and garden belt and not automotive as automotive ones will fail quickly.

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post #6 of 12 Old 12-28-2015, 07:37 AM
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The belts on my craftsman I re powered sure seem to be whimpy - they don't seem to have been the woven L&G variety. They are original. I had problems like you until I really checked the belt alignment and the tension both. I was not able to utilize the spring tensioner arrangment like OEM, but I have it pretty snug and bolted solid. Also I had to raise the engine up ever so slightly with a few washers since the shaft was slightly lower than original. (Used a Honda GX engine). It does not take much mis-alignment to really heat things up - use a straight edge across the face of the pulleys and see what yours look like. Then look for belt deflection when you push in the middle of the run. Mine is about 1/4" right now - but they seem to have much more than that with the spring tensioner - so I am not sure how critical that is? Check the alignment when you have the drive cable enguaged as well - you will notice the angle of the pulley changes quite a bit. Try to pick the spot that is about equal from ide to drive condition - to much either way seems to make a big difference. Good luck



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post #7 of 12 Old 12-28-2015, 09:19 AM
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Sounds like you need a L&G belt
Auto stores do not sell good kevlar belts
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post #8 of 12 Old 12-28-2015, 09:30 AM
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Quote:
Originally Posted by armchairlonghair View Post
Hi my auger belt blew up on my craftsman 8/25. It is a custom job so not standard Ie: new engine and pulleys. I guessed at the size of belt and failed obviously. it lasted less than 3 hrs. anyone have suggestions for the slack required for this set up. The belt is stopped when not engaged and it appears it wore through when rubbed by the still spinning engine pulley.
At least you have a pretty good idea what size and construction is NOT suitable now.

How much slack did you have on that guesstimated belt when you installed it? Probably want to add an inch to the length you tried last time.

As for width, did it sit too deep inside the pulley groove? My 2008 machine ) uses a Kevlar, raw edge belt for the auger.

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Last edited by skutflut; 12-28-2015 at 09:32 AM.
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post #9 of 12 Old 12-28-2015, 11:41 AM
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I consider Gates a good quality belt and I've been getting them from Oreilly Auto parts. I've been using them without any problems on my riding mowers and blowers.

Gates PoweRated 6888 - FHP V-Belt | O'Reilly Auto Parts

They also carry Prime Line belts that claim to be equivalent to OEM.
Prime Line 7-078018 - OEM Replacement Belt | O'Reilly Auto Parts

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post #10 of 12 Old 12-28-2015, 11:55 AM
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You need the W series of belts, they are more money at purchase but will last quite a bit longer.



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Last edited by Coby7; 12-28-2015 at 11:57 AM.
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