Belly mower belt-How tight?

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larryfoster
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Belly mower belt-How tight?

Postby larryfoster » Tue May 31, 2016 8:25 am

I'd appreciate suggestions on the correct amount of tightness for the belt on my Woods mower.
I know how to adjust, just not sure if I should make it real tight or how loose.

Right now, I'm cutting some pretty high stuff

Thank you, in advance

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Re: Belly mower belt-How tight?

Postby Eugene » Tue May 31, 2016 9:19 am

With the mower deck in mowing position there needs to be a bit of slack in the belt tension. Without looking in the manual, guessing being able to press the belt in 3/4" half way from the deck pulley and the mule drive pulley.
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Re: Belly mower belt-How tight?

Postby staninlowerAL » Tue May 31, 2016 9:21 am

If you are running the mower raised up because of the high grass you might have to run the belt a bit loose. You're probably just going to resort to trial and error to find what works. Here's the link for WOODS MOWERS, some information might be found there to answer your questions. Stan http://www.farmallcub.com/[ Sorry, direct links to manual section is not allowed. ]/index.p ... rs&order=0

larryfoster
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Re: Belly mower belt-How tight?

Postby larryfoster » Tue May 31, 2016 11:18 am

Thank you both.
I've been slipping off the pulleys some and figured I was too loose
Just wasn't sure how tight.
This gives me some guidance

I learned something else I hadn't noticed before in the document.
I was letting the skids run on the ground

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Re: Belly mower belt-How tight?

Postby Eugene » Tue May 31, 2016 11:25 am

larryfoster wrote:I've been slipping off the pulleys some and figured I was too loose.
With the mower deck at mowing height, check to see that the belt is pretty much horizontal to the deck pulley. If there is a significant difference in the angle between the belt and pulley, the belt will slip off the pulley.
I have an excuse. CRS.

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Re: Belly mower belt-How tight?

Postby larryfoster » Tue May 31, 2016 11:37 am

I'll double check that but thought it was fairly level.
Thank you.
This is the 2nd or 3rd year for this belt.
It may be stretched a little.
Just ordered a new one from Amazon

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Re: Belly mower belt-How tight?

Postby Dale Finch » Tue May 31, 2016 12:11 pm

I have had a belt that LOOKED in perfect condition, but no matter how it was adjusted, it would eventually throw the belt. I was told the belt was probably bad. I was rather skeptical, but went ahead and swapped it out for a new one. Worked like a champ! It has since been explained, that a "good" belt can be internally damaged (plys broken) and yet LOOK good. I have seen this more times since then. Maybe this is the case?

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Re: Belly mower belt-How tight?

Postby larryfoster » Tue May 31, 2016 12:35 pm

I did notice a few fine cracks on the inside of the belt and that could be part of the problem.

I just looked and I'm running downhill pretty good from the front pulley to the back ones.
If I lower the adjusters to tighten the belt, it will put it more out of level.

On the idler bracket (think that's what it's called), I have 6 holes on each side.
I have the deck arms attached to the second from the front.
I could move to the first hole and that would take some of the slack out and allow me to adjust the pulleys up a little to level out.

BTW, I think it's a 42 C-4

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Re: Belly mower belt-How tight?

Postby larryfoster » Tue May 31, 2016 3:55 pm

I may have gotten the wrong belt.
I got a B 136 and am wondering if it should have been a B 133.

Also, would the pulley size on the PTO shaft make a difference?
I have a smaller pulley and it looks a lot smaller than the picture in the manual

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Re: Belly mower belt-How tight?

Postby Eugene » Tue May 31, 2016 4:35 pm

larryfoster wrote:Would the pulley size on the PTO shaft make a difference?
Larger PTO pulley will spin the mower blades faster than a smaller PTO pulley.

Which Woods deck do you have?

I can measure the PTO pulley on my Woods 42 deck, tomorrow.
I have an excuse. CRS.

larryfoster
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Re: Belly mower belt-How tight?

Postby larryfoster » Tue May 31, 2016 5:37 pm

I believe it is a 42 C-4.
The pulley that is on it has been on it since my dad got the tractor 40+ years ago.

He used to run a sickle bar mower off of it

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Re: Belly mower belt-How tight?

Postby LilCub » Tue May 31, 2016 6:14 pm

I still have much to learn but in my search for a pulley for my C-2 the sickle bar mowers pulley appears to be much smaller, like almost half the size. Please correct me if I am wrong.

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Re: Belly mower belt-How tight?

Postby Eugene » Tue May 31, 2016 6:15 pm

viewtopic.php?f=1&t=92086&hilit=+mott+pto+pulley

Above a discussion on PTO pulleys and pulley sizes.

The PTO pulley for the sickle bar mower is 4 1/2" in diameter.
I have an excuse. CRS.

larryfoster
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Re: Belly mower belt-How tight?

Postby larryfoster » Tue May 31, 2016 6:17 pm

The PTO pulley for the sickle bar mower is 4 1/2" in diameter.


That sounds about what mine is

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Re: Belly mower belt-How tight?

Postby LilCub » Tue May 31, 2016 6:20 pm

Eugene wrote:http://www.farmallcub.com/phpBB2/viewtopic.php?f=1&t=92086&hilit=+mott+pto+pulley

Above a discussion on PTO pulleys and pulley sizes.



The PTO pulley for the sickle bar mower is 4 1/2" in diameter.


That's what I was thinking, from this discussion sounds like rotary mowers are typically on 7.5 to 8 inch pulleys

Correction: after ready further down some run better with 6" pulleys.
Last edited by LilCub on Tue May 31, 2016 6:28 pm, edited 1 time in total.


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