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What is causing my belt to "flip" invert?


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#16 dualresponse1731 OFFLINE  

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Posted May 21, 2016 - 02:10 PM

Annnnnnnndddd it still doesn't work!!!! HAH!!!  Took it out and it it didn't fix it. I got bored and pulled off the 3.5 inch pulley, loosened the spring, and installed the spare 4.5 inch pulley to see if that would make things more stable. I ordered a new kevlar belt. Reassembled the mule drive and fired it up.

 

Now the belt stays right side up on the PTO pulley, the tensioner pulley, and the mower deck pulley, but it FLIPS on the Idler pulley. Upon closer inspection of that idler pulley- the inside of the V groove has worn significantly from a "V" shape into a rounded "U" shape over time. I could see where it wouldn't guide the V belt into a V configuration. The belt is also  probably trashed at this point.

 

So after a quick internet search of a 4.5 diameter pulley and a 5/8 bore sealed bearing- I found TWO new pulleys at tractor supply down the street. I'm off to pick them up now. Stay tuned! :)


Edited by dualresponse1731, May 21, 2016 - 02:11 PM.

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#17 dualresponse1731 OFFLINE  

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Posted May 21, 2016 - 02:30 PM

And here's a pic of the worn pulley and how it has rounded out.

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Edited by dualresponse1731, May 21, 2016 - 02:32 PM.

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#18 KennyP ONLINE  

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Posted May 21, 2016 - 02:51 PM

And here's a pic of the worn pulley and how it has rounded out.

That probably had a lot to do with it.


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#19 dualresponse1731 OFFLINE  

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Posted May 21, 2016 - 04:54 PM

Got two 4 1/2 pulleys with 5/8 diameter bores from TSC and a new 82 inch belt. Rebuilt mule assembly, lubed it up and reinstalled using old trashed belt. Immediately  flipped (I figured it would- but it was worth a shot). Tossed out old trashed belt. Installed new kevlar belt. Mowed lawn- turning the deck on and off several times to spin it up. It did not flip! Crossing fingers.

 

The new  pulleys are wider than the original Ford pulleys, and have a wide flange at the outer edges,  but fit,  and the internal v grooves and bearing offsets (the important parts) are the same, They fit and work. Included pic of the "new" trashed belt against the "newer" kevlar belt. Check out the worn edge. The belt was more square than v shaped.

 

Since I went from a 3.5 inch to a 4.5 pulley- I backed way off on the spring tension. The belt is much looser now. I might tighten it, but for now, things seem alright.

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Edited by dualresponse1731, May 21, 2016 - 05:01 PM.

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#20 skyrydr2 ONLINE  

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Posted May 22, 2016 - 06:03 AM

50" deck uses the longer belt ,80 somthing, and all the 42" decks use 78" belts.. If the belt is too long it does exaxtly what you have experienced. Also if the belt is too narrow a gage it will flip.
Mule drive has to be ajusted correctly too, or you will kill the belt when lifting up the deck if its too tight.
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#21 skyrydr2 ONLINE  

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Posted May 22, 2016 - 06:06 AM

Also your bolt is backwards, nut should be out front for easy ajustment. Then the movable part is not rubbing on the threads and shoulder.

Edited by skyrydr2, May 22, 2016 - 06:08 AM.

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#22 old coot OFFLINE  

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Posted May 22, 2016 - 11:01 AM

had the same problem on my John Deere . the belt came from a john deere dealer, kept flipping being I had to mow the yard I went to  the local napa  (closer to me than the jd dealer) the  napa belt has been good for the last three years...I guess it could have been a defect in the dealer belt , never really checked it out


Edited by old coot, May 22, 2016 - 11:02 AM.


#23 UncleWillie ONLINE  

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Posted May 22, 2016 - 08:01 PM

The belt on my suburban kept flipping when I got it. Found the belt guide on this site and the guy before me had too. Arrow a belt on. Put the right size on and no more problem.


I just thought you were drunk.
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#24 JBRamsey ONLINE  

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Posted May 22, 2016 - 08:36 PM

I just thought you were drunk.


Be careful. I know how to get to Gaston County. I grew up just across the state line.
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#25 UncleWillie ONLINE  

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Posted May 22, 2016 - 08:53 PM

Be careful. I know how to get to Gaston County. I grew up just across the state line.


Head on over it's a small town. Bring beer.
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#26 dualresponse1731 OFFLINE  

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Posted May 22, 2016 - 09:04 PM

Head on over it's a small town. Bring beer.

Hey... I'm not too far from Gaston myself!!!... I'll be right over!



#27 UncleWillie ONLINE  

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Posted May 22, 2016 - 09:28 PM

Hey... I'm not too far from Gaston myself!!!... I'll be right over!


tractor party
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#28 greenb69 OFFLINE  

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Posted May 23, 2016 - 09:50 AM

I had the same problem on a wheelhorse and found that I could not use the Kevlar belts because they had less of a v in them. Different manufacturers put either a deep or shallow v on their belts. Just another belt experience.

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