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Why won’t my belt stay on ?

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tenn terry t
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Why won’t my belt stay on ?

Postby tenn terry t » Tue Jul 24, 2018 5:24 pm

I am trying to use my woods 42 mower but I can’t keep the belt on I have a nice b142 belt and get it tight it will sit and run. But if I move the deck higght or even try to increase the throttle it will throw it right off :surrender: any ideas?

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tmays
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Re: Why won’t my belt stay on ?

Postby tmays » Tue Jul 24, 2018 5:38 pm

Are your idler pulleys pretty much at the same height? And not too far up or down in the slots? Is belt dropping straight down from the pto pulley to the idlers?
Thomas

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tenn terry t
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Re: Why won’t my belt stay on ?

Postby tenn terry t » Tue Jul 24, 2018 6:12 pm

I may have found it one of the idle pulleys has quite a bit of slop in it. how tight are the belt supposed to be?

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Re: Why won’t my belt stay on ?

Postby ntrenn » Tue Jul 24, 2018 10:15 pm

Pretty much banjo string tight. I used to use the lift rod to walk the belt on and off. Dealer sells new pulleys for pretty reasonable. Also I found out this year that a new belt likes to jump off until it warms up even with good pulley alignment

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tenn terry t
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Re: Why won’t my belt stay on ?

Postby tenn terry t » Fri Jul 27, 2018 1:03 pm

Well well well I put new pulleys on this dang thing got it as tight as i could it ran for about ten minutes in fairly tall grass before to threw it again y’all reckon my belt is too long? I have a b-142 belt I now see it calls for a 5/8x136 belt My belt goes down within two inches of bottoming out
Last edited by tenn terry t on Fri Jul 27, 2018 2:53 pm, edited 1 time in total.

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tmays
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Re: Why won’t my belt stay on ?

Postby tmays » Fri Jul 27, 2018 1:19 pm

Yeah, too long. But something you can try before buying another one. The mule drive has different holes for mounting the mower. Mount it in the lowest hole and see if that helps.
Thomas

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tenn terry t
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Re: Why won’t my belt stay on ?

Postby tenn terry t » Fri Jul 27, 2018 1:24 pm

Thank you sir

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Re: Why won’t my belt stay on ?

Postby tst » Fri Jul 27, 2018 1:38 pm

some of these also have a belt guide that mounts on the deck near the pulley that helps keep the belt on, is it broken off or missing, its the piece that is bent 90 degrees in the pic
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tmays
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Re: Why won’t my belt stay on ?

Postby tmays » Fri Jul 27, 2018 1:58 pm

Agree with tst. Belt does tend to jump on that side
Thomas

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tenn terry t
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Re: Why won’t my belt stay on ?

Postby tenn terry t » Fri Jul 27, 2018 2:04 pm

I saw that on a drawing I don’t have one.the belt is coming off the idle pulley on the right side. I’m going to get a shorter belt and try that . what length belt are you guys running books shows a 136 belt

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Re: Why won’t my belt stay on ?

Postby tst » Fri Jul 27, 2018 7:55 pm

that is correct

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Mike in Louisiana
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Re: Why won’t my belt stay on ?

Postby Mike in Louisiana » Sat Jul 28, 2018 10:04 am

Also check that your pulleys don,t have a sweet gum ball or piece of wood in the groove.
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Re: Why won’t my belt stay on ?

Postby Scrivet » Sat Jul 28, 2018 10:13 am

tmays wrote:Yeah, too long. But something you can try before buying another one. The mule drive has different holes for mounting the mower. Mount it in the lowest hole and see if that helps.
On the Woods the holes don't change the belt length, just the cutting height. If you move down you also move back keeping the needed belt length the same. Otherwise you would have to have a different belt for each hole.

ntrenn wrote:Pretty much banjo string tight. I used to use the lift rod to walk the belt on and off. Dealer sells new pulleys for pretty reasonable. Also I found out this year that a new belt likes to jump off until it warms up even with good pulley alignment

As for tightness, remember that when the deck is raised the belt should have just a little slack in it. Once you lower to cutting height it will tighten up. I always adjust belt tension with the deck raised and then lower to cutting height to snug up the belt. I've never had problems with a new belt but I loosen the idlers to put a belt on. I think walking it on or rolling it over the edge of a pulley when tight could damage the belt. The belt needs to be snug, but the more tension it has the more it pulls down on the PTO pulley, which pulls up on the pilot bushing on the other end. Not an issue with the PTO engaged but it can make it harder to engage and excessively wear the pilot bushing when disengaged.

If you haven't seen them yet, there are some good pictures and explanations of proper pulley alignment in the Woods manuals in the manuals section.

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tenn terry t
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Re: Why won’t my belt stay on ?

Postby tenn terry t » Sat Jul 28, 2018 2:03 pm

update !!!!! thanks to everyone who helped out on this. Come to find out it was the belt all along. I purchased a new b133 this morning installed it and off I went . I know its too tall and worked the snot out of my 56 but I cut close to a half acre that was tall enough that the front axle was pushing it over, Johnson grass and fescue mostly. I think i'm safe to say it will cut my yard now. thank you thank you thank you!!!! :thanx: :worthy: :tractor:

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Re: Why won’t my belt stay on ?

Postby inairam » Sun Jul 29, 2018 3:50 pm

One thing I would like to add beside the correct belt - If you work on the hub / clutch and the pulley can be off and cause the belt to come off. You need to keep you eye on the pulley as you put the clutch back together to make sure it is level.
When you only have 9 horsepower you need to know the names of all of the ponies!


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