Pulleys Squealing?

Bryce C

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Feb 9, 2024
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Connecticut
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Bryce
I bought a mechanics stethoscope for identifying these things a while ago. Never used it. I suppose now would be a good time to try...
 

Bryce C

DFW
Joined
Feb 9, 2024
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694
Location
Connecticut
Name
Bryce
Squealing belts are almost eighter loose belts, badly worn belts . But more often than not its caused by misaligned belts. Especially if there is little or no vibration. Check idler pulleys but my moneys on alignment or loose belts

Got it I'll do that, this is very helpful. Thanks Dwain!
 

Dwain Ray

Supportive Member
Joined
Jul 22, 2020
Messages
274
Squealing belts are almost eighter loose belts, badly worn belts . But more often than not its caused by misaligned belts. Especially if there is little or no vibration. Check idler pulleys but my moneys on alignment or loose belts
One other thought is contaminated belts. If you have been doing alat of work around them perhaps you got some grease or other products on them
 
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Dwain Ray

Supportive Member
Joined
Jul 22, 2020
Messages
274
Squealing belts are almost eighter loose belts, badly worn belts . But more often than not its caused by misaligned belts. Especially if there is little or no vibration. Check idler pulleys but my moneys on alignment or loose belts
If the belts are misaligned the v
Belts can be straight edged aligned pretty easily. I cut down a 3' metal ruler i got from harbor freight to the various sizes of straight edges i needed for my machine. However if it is the Serpentine belt that needs to be aligned it can .be straight edged buuuuuuttt, i highly highly highly recommend that if thats the case you invest in a laser alignment tool. Serpentine belts have a tolerance of only ½ngroove for every 6" between the closest pulley and the pulley your trying to align v belts on the other hand are alot more forgiving. Lif your interested in a laser alignment tool for v belts. I found and bought one off a hog farm supply for about 30 bucks but it only works on A belts not B belts. If you want it message me and ill get you the information.

Screenshot_20250703_170155_eBay.jpg
 
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Dwain Ray

Supportive Member
Joined
Jul 22, 2020
Messages
274
I bought a mechanics stethoscope for identifying these things a while ago. Never used it. I suppose now would be a good time to try...
It was pointed out to me that while trying to relay more information to you i actually replied to myself. So if you scroll through the comments youll see what i was saying about belt alignment. Now the information i would like to convey is belt type. If you replace your belts and have smooth v belts change over to cogged belts i screen shot an article explaining the differences. X in gates belt # denotes cogged belt ie: Ax32 is A belt cogged 32" also if not already installed when you change your Serpentine belt upgrade to gates fleet runner belt (green belt) it holds up longer and can transfer more power than standard belts

Screenshot_20250703_175938_Chrome.jpg Screenshot_20250703_175950_Chrome.jpg Screenshot_20250703_180021_Chrome.jpg Screenshot_20250703_180041_Chrome.jpg Screenshot_20250703_180054_Chrome.jpg Screenshot_20250703_180107_Chrome.jpg Screenshot_20250703_180118_Chrome.jpg
 

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