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  #1  
Old 05-25-2013, 10:11 PM
bstouffer bstouffer is offline
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Location: Iowa
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Default Belt alignment woes
I'm at my wits end with this thing. Its a 149 hydro and I'm trying to get the mower deck working. Here is the trouble: Last year it worked fine and at the end of the season, the belt snapped. Since it was a 25 year old belt it didn't bother me too much. So, I put on a new belt, 78" long which is what I think the old one was (and it is a 44' deck). the new belt was really too tight and could not be adjusted properly and consequently it threw the belt and boogered it up. I tried a 79" belt, adjustment is OK and it doesn't seem to throw it but the belt is wearing fast and the front idler pulleys get hot.

Here is the question: The main deck pulley sits off center on the tractor and this makes the belt ride at an odd angle off of the front idler pulleys. Is this normal? It just doesn't seem right but it worked fine last year so I wonder if I am missing something? The deck really only goes on one way as far as I can see and I have consulted the manual every step of the way. Any ideas?
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  #2  
Old 05-25-2013, 11:37 PM
J-Mech J-Mech is offline
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Yes, that setup is normal. The front mule drive pulleys are supposed to be twisted slightly so that they direct the belt toward the deck spindle. I'd say, when the new belt kicked off, it bent them. Twist them so they run the same direction as the belt.
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  #3  
Old 05-26-2013, 12:56 AM
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zippy1 zippy1 is offline
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Originally Posted by J-Mech View Post
Yes, that setup is normal. The front mule drive pulleys are supposed to be twisted slightly so that they direct the belt toward the deck spindle. I'd say, when the new belt kicked off, it bent them. Twist them so they run the same direction as the belt.
Are your front pulleys free to spin without a belt? If their stiff or turn hard that would get them warm in a hurry. Your belt and pulleys should be angled to the left as you sitting on the tractor, both about the same. Check to see if the belt rides up on the edge anywhere. And that they are seated down in the pulleys the same.
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  #4  
Old 05-26-2013, 06:41 AM
R Bedell R Bedell is offline
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How about some pictures of the mower deck and especially of the Mule Drive.

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  #5  
Old 05-26-2013, 09:52 AM
bstouffer bstouffer is offline
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Man, im feeling stupid but you guys are immensely helpful. The mule drive i'm using is the same one I used with my tiller and is the only one the PO gave me. It sounds like the mule drive for the mower should be specific for the mower and would explain why I'm having issues. My pulleys are angled straight back, are not bent, and turn freely so it must be the incorrect drive unit? I will try to get some pictures taken today.
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  #6  
Old 05-26-2013, 10:14 AM
bstouffer bstouffer is offline
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Ok- I now know that this is a mule drive for a mower which the p.o. had bent the pulleys straight so they could use it for the tiller. How the mower worked last fall I dont know but explains why it broke the belt. I am going to bend the pulleys back to the original angle and try to find a correct drive unit for my tiller. Thanks for all the help!
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  #7  
Old 05-26-2013, 01:47 PM
J-Mech J-Mech is offline
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Ok- I now know that this is a mule drive for a mower which the p.o. had bent the pulleys straight so they could use it for the tiller. How the mower worked last fall I dont know but explains why it broke the belt. I am going to bend the pulleys back to the original angle and try to find a correct drive unit for my tiller. Thanks for all the help!
I just bought a second mule drive and bent the pulleys for my tiller. Trying to find the correct one for a tiller is hard, easier to just get a mower one and straighten it. IMHO.
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  #8  
Old 05-26-2013, 03:12 PM
restore49 restore49 is offline
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Like this - from another member. 44 in. deck - 9 degree +-.
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File Type: jpg mule%20pully.jpg (15.4 KB, 75 views)
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