Sheave Maintenance

Routine maintenance of blower sheaves should include a close examination of the alignment of the motor and blower sheaves. Proper belt tension is also important to maintain the life of the sheaves. Groove gauges are often provided by belt and sheave suppliers to test the sheave walls for wear to determine the need for replacement.

Another important item to check is the RPM’s of the blower to determine if it is within the range that was established during commissioning by test and balance personnel or startup technicians. Once the sheaves get a measurable amount of wear, it becomes increasingly difficult to provide the proper air delivery of the blower due to lost RPM’s.


This year’s AHR Expo is hosted by the good folks of Chicago. This is also the home of RSES and should have plenty of their folks on hand to showcase their comprehensive line of educational products for the HVACR industry. Make sure you visit their booth at the Expo, should you be fortunate enough to attend.