Trying to replace the bolt tensioner for the A/C belt. I have the parts - tensioner bolt, lock nut and 2 nuts for the end of the bolt. Installed all, just as the diagram shows, but when I tensioned the belt the two bottom nuts just fell off because you have to turn the tensioner bolt counterclockwise to set the tension. What am I doing wrong? Thanks!!
Kubota M7060HDC A/C Belt Tensioner
- Thread starter jomch
- Start date
If bolts are falling out I’m gonna say your probably doing something wrong. I’ll have to have a look at mine today to refresh my memory but I changed it a year or two ago and did not have any issues like you described. A few pictures might help you get answers from others that don’t have the m7060. I’ll try and have a look and post back asap
Thank you! The two bottom nuts seem to be there to 'pull' the tension shaft as you turn the tensioner bolt counterclockwise. But, of course, as you turn counterclockwise, the two bottom nuts come off. Parts are all Kubota OEM.
mcmxi
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The two bottom nuts are jam nuts i.e. they need to be tight against each other so that they can't rotate? You could apply some blue or red Loctite and tighten them against each other. I have an M6060 but it's the same engine and took some photos of the tensioner. The top nut is obviously a lock nut which you'd loosen, and then turn the long bolt counterclockwise which would move the pulley upwards. Once the belt tension is good you'd tighten the lock nut against the casting.
It sounds like your bottom jam nuts are not tight enough against each other and so they're able to rotate relative to the long bolt as you're turning it counterclockwise.
Thank you for this information. The original bottom nuts seemed to be a little different and when I ordered them, I saw that they were 'replaced'. That along with the extreme difficulty of getting a wrench in there, I thought there must be a different configuration -- WRONG! Bottom line, you are absolutely correct and I hasve been able to get these nuts 'jammed' together. Thanks again!
Joe
mcmxi
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I tried to get a better view of the nuts underneath the idler this morning. I have an automotive mirror and should have used that yesterday but maybe these images will help someone else now that you have it sorted. It does look like two nuts that are jammed together.
mcmxi--Maybe you are familiar with this as well. The A/C fan belt needs tightening continually. What are your thoughts? Thank you!
mcmxi
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Belts will stretch initially, but at some point they typically stop. That's been my experience at least with numerous vehicles over the years.
I have the same problem and I'm trying to figure out how to get the nuts jammed together also? Help!!!
The area is very tight, as I'm sure you know. To give yourself more room you have to remove the the tensioner pulley. I found you could hold the bottom nuts with a needle nose pliers while you turn the tensioner bolt to attach and repeat for the other nut. Hope this helps.