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My deck belt keeps comeing off my mower ltx 1040

I have put 3 belts on my mower in 3 weeks when you engage the blades the belt comes off my spindles are new my idlers are good about ready to disowen a cub cadet thanks

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  • Anonymous Apr 26, 2017

    Unless you hit something..have a seized spindle or a bad (bent or not spinning properly) idler ... its on wrong, its that simple. A couple guys on here sent you a diagram link of the belt routing. Follow the design in your manual perfectly on how it is twisted onto the pulley's. If its flat on one side and rounded on the other…make sure the flat side of the belt is touching the pulley where its supposed to be touching flat on that particular pulley as it shows in the manual and when it twist onto another spool , make sure you twist it EXACTLY like it is in the manual and make sure the proper side of the belt is touching the next pulley as well…it sounds ridiculous but it makes a difference on how it spins on the will spinoff EVERY TIME if its not PERFECT…if you're lucky over a little time …or ... either as soon as you start the mower or within a few seconds of running . You can see it moving incorrectly on the spools if you attach the belt and pull it…its hard but you can pull it…watch how it rotates on the spools ….you can see it moving to to top of one of the spools as you rotate….thats not supposed to happen, its supposed to be seated comfortably on the spool as it rotates… I am not a tech but have a farm and take care of all my equipment myself and have gone through this with my ariens (gravely) zero turn mower…it was frustrating for a few hours until I pulled out the manual and it clearly stated that this would happen if the proper belt sides weren't on the proper pulley. And poof ! Amazing fix !! I hope this helps you…..also , just for the sake of things, you mentioned you have new spindles, make sure they are all good…you may have a seized one due to a bad rebuild or just got a bad new spindle. If there are no twist in your belt as you attach…check tightness may be just too loose.. Doesn't sound like a major fix, just a frustrating one.Best of luck to you..don't give up on cub cadet..they are probably as good as a very expensive ariens ..if not better. Cheers.



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  • Cub Cadet Master
  • 915 Answers

Be sure the pulleys isn't bent. there should be belt guards. be sure they are on. with the engine off see if you can turn the blades to see when and where it is coming off.

Posted on Apr 27, 2017


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SOURCE: Trying to put on mower deck belt for cub cadet

Visit this web site
you can pull up your Cub

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SOURCE: idler arm 1045 cub cadet

Check for alignment of all the pulleys--esp the idler arm. Probably enough out of alignment to "work" the belt off----possibly bent?

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SOURCE: cub cadet rzt 50, hit stump, blades wont engage but not bent

The blades on this cub cadet are activated with air pressure. Chances are that when you hit that stump, you either blew a fuse or the control module that allows the blades to spin. Begin by checking the fuses. J.

Posted on May 28, 2010

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SOURCE: drive belt diagram for a cub cadet ltx 1040

Go to this website, upper right hand corner and do a parts look up. Search for your model and that good stuff they ask of you and then choose mower housing should be there, browse the site it's really cool and has a lot of info.
I did a sample search for generic riding mower deck and found great diagram of belt routing. Give it a try jelly bean you will find same results Good Luck! Don't forget the thumbs!

Posted on Aug 14, 2010

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SOURCE: 982 cub cadet 3 blade

hi there pauly 46 here

here is web site for streetsign cub cadet 982 46 " deck with 3 blades

this shows deck belt routing

and here is website area for 982 parts break down for model 982 cub cadet

take a look cheers hope it helps


Posted on Apr 29, 2011

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1 Answer

I need a belt diagram for a ranch king king plus also i need to know the size for the main drive belt

Ranch King is a brand name of the manufacturer MTD.

Product manuals with part blow-up diagrams are available from MTD's web site,
Models are identified from the model number printed on a label under the mower seat.
The PTO and deck drive belts are shown on one diagram and the transmission drive belt is shown on another. The Form number on my printed Operator's Manual is 770-10526A (22HP, 46in cut) for Hydrostatic 817/818 models.

Parts can be ordered directly from MTD or other distributors on the web.

It is my experience that original brand name MTD belts work best.

The 22HP, 46" mower deck Ranch King Pro has 3 belts:

The drive belt which runs from the engine pulley back to the hydro drive unit to provide over-the-ground propulsion is part #754-0349.

A mower has either an electric PTO or a manual PTO, not both.

The electric PTO belt the provides power to the blade deck (runs around the electric clutch on the engine shaft (activated by electric switch, not the mechanical hand lever that engages the mower deck) is p/n 754-0476 for the 46" deck.

The manual PTO belt the provides power to the blade deck (runs off the pulley on the engine shaft (activated the mechanical hand lever to the left of the steering wheel that engages the mower deck) is p/n 754-0228 for the 46" deck.

The deck belt that goes around the 3 blade spindle assemblies on the mower deck, to drive the grass cutting blades is p/n 754-0349

In my experience, the PTO belt lasts about half a season, the other belts break about every other season when mowing 4 acres weekly.

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