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  #1  
Old 05-01-2018, 02:40 PM
MiniXP MiniXP is offline
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Default Belt for 42" Mower Deck
I have a 42" mower deck that I bought for my 105 that I have been trying to get working. the mower deck has a model number on it of u-1111. Problem is the Mule drive, deck and tractor all came from different sources, so I have never had them working together.

I have it all mounted and am trying to put the mule drive belt on. Based on all the parts diagrams I have looked at, I should use an 81" belt, which is what I have.

Problem is, this belt seems way too tight. I managed to get it on, but I had to loosen the tensioner bolt all the way and unhook the tensioner spring.The pulley with the unhooked tensioner spring is now rubbing up on some metal and it seems like it would take way too much force to hook the spring up.

Should I just buy a longer belt? I can't find anything saying I should be using a longer belt, but I have seen there are some belt sizes all the way up to 89".

I've included a few pictures in case I'm doing anything obviously wrong.




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  #2  
Old 05-01-2018, 05:24 PM
R Bedell R Bedell is offline
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IF...........everything is correct and OEM, then the correct belt for a 105 Tractor with a 42" QA Mower Deck would be IH-490489-R2 (3/8" x 80").
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  #3  
Old 05-01-2018, 09:45 PM
MiniXP MiniXP is offline
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Quote:
Originally Posted by R Bedell View Post
IF...........everything is correct and OEM, then the correct belt for a 105 Tractor with a 42" QA Mower Deck would be IH-490489-R2 (3/8" x 80").
Yea I've seen that part number listed. I purchased the 81" based off of some other diagram for mower decks.

The 81" doesn't fit, so an 80" definitely wouldn't.

Is there anything I could be doing wrong? Could I have the wrong mule drive? everything hooked up on it correctly. It's one of the ones with a tensionser spring for the pulley on one side and a bolt to adjust tension on the other.
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  #4  
Old 05-01-2018, 09:51 PM
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athomas athomas is offline
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I use the Stens # 265-037 which is 1/2 x 81.5 on my 109-129, 42 " decks ( 71-74 style ) which is supposed to be the replacement for the IH 490489-r2 it's always worked fine and I end up about 1/4 to 1/3 of the way on my adjuster when the mule drive idlers are about even, I believe the mule drive pulleys are about 3" on the od . I think the IH-473462-R4 was a 3/8 x 81 belt listed for the 105 pto drive but I've also played the belt game when someone has done a mix and match job ! bottom line if it's to tight then you will not be able to get the proper alignment of the idler pulleys and likely start wearing things out !
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Old 05-02-2018, 08:38 AM
MiniXP MiniXP is offline
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Quote:
Originally Posted by athomas View Post
I use the Stens # 265-037 which is 1/2 x 81.5 on my 109-129, 42 " decks ( 71-74 style ) which is supposed to be the replacement for the IH 490489-r2 it's always worked fine and I end up about 1/4 to 1/3 of the way on my adjuster when the mule drive idlers are about even, I believe the mule drive pulleys are about 3" on the od . I think the IH-473462-R4 was a 3/8 x 81 belt listed for the 105 pto drive but I've also played the belt game when someone has done a mix and match job ! bottom line if it's to tight then you will not be able to get the proper alignment of the idler pulleys and likely start wearing things out !
So sounds like since I may have mix and matched parts, I should just find a belt length that works for me? I could always measure the distance that it would take for the pulleys to be 90 degrees and use that as an estimate for how much more length I need.

Or is there a way to tell if I have the wrong mule drive? the mule drive is the only thing I don't have a serial or part number for. With the cost of belts, it could be cheaper to find another mule drive if that would fix my issue.
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  #6  
Old 05-02-2018, 09:31 AM
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athomas athomas is offline
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Most of the older mule drives are pretty much the same,provided nobody installed a large diameter idler pulleys ,with the adjuster nut lengthened the whole way you should be able to pull the right length belt onto the pulleys,it pulls on fairly tight but still leaves room to adjust and even the idlers out. if you pull the belt on and it is so tight it pulls the spring loaded idler back towards the center of the tractor that it is impossible to adjust then the belt is way to short.What is the od of your idlers and the top pulley on the deck ?
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Old 05-02-2018, 10:24 AM
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DoubleO7 DoubleO7 is offline
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your tractor has the QA mule drive mount.
Are you using a bolt on mule drive??

The front mount in the pics looks to be a different color than the rest of the mule drive.
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Old 05-02-2018, 11:08 AM
MiniXP MiniXP is offline
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Quote:
Originally Posted by DoubleO7 View Post
your tractor has the QA mule drive mount.
Are you using a bolt on mule drive??

The front mount in the pics looks to be a different color than the rest of the mule drive.
I'm not sure. The Mule Drive clicked into the QA fine and appears to be mounted well. Everything lined up.

Quote:
Originally Posted by athomas View Post
Most of the older mule drives are pretty much the same,provided nobody installed a large diameter idler pulleys ,with the adjuster nut lengthened the whole way you should be able to pull the right length belt onto the pulleys,it pulls on fairly tight but still leaves room to adjust and even the idlers out. if you pull the belt on and it is so tight it pulls the spring loaded idler back towards the center of the tractor that it is impossible to adjust then the belt is way to short.What is the od of your idlers and the top pulley on the deck ?
I had to use a screw driver to pry the belt onto the pto even with the spring not attached to 1 idler pulley and the screw loosened all the way on the other, so I'm guessing that is more force than it should have taken.

I'll measure those tonight. Pulley diameter seems to be the only thing here that would effect this.
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  #9  
Old 05-02-2018, 11:11 AM
sir_lancealot sir_lancealot is offline
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Nowhere have you stated the width of the belt you're using. If you're using a 1/2" belt instead of a 3/8" belt, it won't fit right. You have to match both dimensions.
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  #10  
Old 05-02-2018, 05:23 PM
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DoubleO7 DoubleO7 is offline
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Quote:
Originally Posted by R Bedell View Post
IF...........everything is correct and OEM, then the correct belt for a 105 Tractor with a 42" QA Mower Deck would be IH-490489-R2 (3/8" x 80").
When you google that IH belt and look at non Cub Cadet belts that are marketed as replacements, they are listed as 1/2" x 81-1/2".
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