Why would the blower coupling be damaged after very little time running?
• If motor coupling (sure-flex sleeve) has gone bad or been damaged while running for a short time frame, then the motor shaft and fan shaft are not properly aligned. The alignment is what the flex sleeve will help with, but when alignment is to far out of tolerance then the coupling will become damaged. • This could also be because flanges that hold coupling are too tight or too loose. The coupling needs to fit snuggly in place between 2 flanges. • Incorrect size coupling and flanges were used for the application.
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