had the unfortunate privilege of working on a 40 ton TEREX rt crane with a 6bt cummins. just looking to bounce some ideas off other people. it has a terrible belt squeal, all the time…. worst ive ever heard. only has a water pump, fan, and alt + tensioner. have tried a new belt new tensioner, MULTIPLE belts infact. bought laser belt tool and helped a bit the alt was out only a little bit. shimmed it. all pulleys are good and alignment seems good. belt squeals at all RPMS. spray water goes away…. other guy has sprayed everything on it. grease, WD, oil, soap water, rubber treatment, belt dressing you name it. changed belt again cleaned all the pulley groves and scuffed with scuff pad. still squeals like a stuck pig!
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