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Mf14 Breaking Belts


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#16 DH1 OFFLINE  

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Posted July 08, 2013 - 07:33 PM

Something bent, loose, worn out???



#17 HowardsMF155 OFFLINE  

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Posted July 08, 2013 - 10:20 PM

I did notice a few nicks in it elsewhere but found nothing for it to catch on. I am on the verge of just going and getting a new mower

I'm in NC.  Let me know if you don't want it. 



#18 HowardsMF155 OFFLINE  

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Posted July 08, 2013 - 10:27 PM

On a more helpful note, now that I have read beyond your second post, I'm going to say you MUST have some sort of pulley alignment problem.  I rescued an older Massey with belt alignment problems and it would wear in one particular spot on the belt for some reason, I'm thinking that may be what you are experiencing.   Can you get at those two mule drive, or guide pulleys and figure out why they have some "toe-in" as you called it?  Might be bad bearings, might be a bent shaft.  You can probably get replacement pulleys somewhere local.

 

Welcome to GTTAlk, by the way.  We would love to see pics of your new tractor.



#19 pianotuner OFFLINE  

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Posted July 09, 2013 - 08:34 AM

I have a14 and 16 The 16 has the pulleys straight and had a belt throwing problem so I made an L shaped bracket for the drivers side pulley to keep the belt on.  No problems since.  The 14 had the toe in on the pulleys and never had a problem with the belts.  I'm guessing the problem is the deck spindles with with bad bearings seizing.  The spindles CAN be welded up and machined back to specs if that is the case.  I'm guessing the toe or no toe was a change in design later on.

I was told by many that you can't do that but I remembered that I had a V8 crank welded and recut 50 years ago.  All they have to do is weld the crank up,  Flame heat and cool slowly to take out the temper, machine it, and reheat and retemper.  l have a WW 2 machinist book that shows how to retemper by heating steel to different colors and cooling in oil.



#20 2000wreckedwj OFFLINE  

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Posted July 09, 2013 - 04:53 PM

From what I was told from the previous owner, the deck bearings were replaced. I got the pulleys straightened out today at work and got a new belt. About 30mins of cutting the grass when I got home the belt broke. No other nicks in it this time. Also the belt was hot when I picked it up. Almost too hot to touch. 



#21 IamSherwood OFFLINE  

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Posted July 09, 2013 - 05:01 PM

I just went through the same thing on my MF14 deck that I adapted to my MF1450.

The mule drive I used is the one for the MF14 deck.

After about a total of 10 hrs of mowing this spring, the belt self destructed. Prior to

that, I had noticed it had rolled.

 

I found the passenger side pulley on the mule drive deformed. It was rounded, not "V" shaped.

Also, the tensioning spring in the mule drive seemed weak. The 2 pulleys should be at the same height.

They weren't, so I found a new stronger spring. As DH1 said, those belts have to be tight.

 

Mowed a couple hrs last night. All good so far.



#22 IamSherwood OFFLINE  

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Posted July 09, 2013 - 05:03 PM

From what I was told from the previous owner, the deck bearings were replaced. I got the pulleys straightened out today at work and got a new belt. About 30mins of cutting the grass when I got home the belt broke. No other nicks in it this time. Also the belt was hot when I picked it up. Almost too hot to touch. 

 

Any chance you can post some pics of all the vital parts, so maybe we can spot something?



#23 DH1 OFFLINE  

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Posted July 09, 2013 - 05:36 PM

From what I was told from the previous owner, the deck bearings were replaced. I got the pulleys straightened out today at work and got a new belt. About 30mins of cutting the grass when I got home the belt broke. No other nicks in it this time. Also the belt was hot when I picked it up. Almost too hot to touch. 

If the belt is hot, really hot then it must be slipping or rubbing on something.

What kind of shape is the crank pulley in, any nicks or bends in it?



#24 101 senior OFFLINE  

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Posted July 09, 2013 - 06:27 PM

Get a blue belt, put the tractor and mower on a flat surface. Let the deck down and see if the belt is straight from mule gear to mower pulley. Check to make sure it has proper tension. If not tight enough it can cause whipping. Last but not least, check your mule gear unit. I have seen one where the pulley axle had wore in to the body causing the pulley to sit cockeyed which caused the belt to come off and most times wedge between them slicing and breaking the belts. Hope this helps.


Edited by 101 senior, July 09, 2013 - 06:27 PM.

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#25 2000wreckedwj OFFLINE  

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Posted July 09, 2013 - 07:13 PM

Here are some pics. The pic from the front of the mule drive is how the pulleys were aligned when the belt broke. The belt is level front to back with the deckIMG_20130709_190537_812.jpg IMG_20130709_190625_614.jpg IMG_20130709_190644_416.jpg IMG_20130709_190659_342.jpg IMG_20130709_190727_540.jpg IMG_20130709_190805_444.jpg IMG_20130709_190831_206.jpg IMG_20130709_190848_565.jpg


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#26 HowardsMF155 OFFLINE  

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Posted July 09, 2013 - 07:30 PM

Maybe it is an effect of the picture, but the mule drive pulley on the left (as you are looking at the front of the tractor) seems to be worn and have a 'step' on it.  The other pulley also looks more U shaped than V shaped.  I might try replacing those pulleys to start with.  I'd also double check all my shafts for free movement, and especially check any idler pulleys for smooth turning.  I've had a flat pulley go bad and it's hard to spot when it happens.


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#27 2000wreckedwj OFFLINE  

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Posted July 09, 2013 - 07:35 PM

I will try that. Are they supposed to be at different levels like they are? from side to? or are they supposed to be inline with each other



#28 IamSherwood OFFLINE  

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Posted July 09, 2013 - 07:46 PM

" The pic from the front of the mule drive is how the pulleys were aligned when the belt broke."

 

 

I think you're not tightening the belt enough, and it's getting damaged by flopping around.

The passenger side pulley shaft should be lined up with that arrow on the decal.



#29 2000wreckedwj OFFLINE  

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Posted July 09, 2013 - 08:23 PM

so the belt has to be super tight then. That is one of my issues I know for sure. I tighten the belt fairly tight but nowhere near tight enough to start moving that other pulley to get it lined up with the arrow. I'm going to take one of the Pulleys Off and hit up my local Ace Hardware and hopefully they have two replacements. Thank you for all the help and I will update as soon as I get it back together

#30 DH1 OFFLINE  

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Posted July 09, 2013 - 09:25 PM

I was reading the owners manual and it says in there that when the belt is tight the 2 pulleys on the mule drive should be at about the same level, as others have said.

Also it says that "if the front of the mower deck is too low when the deck is lowered the belt may turn over or jump off".






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