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Topic: Aux Compressor "knocking" (Read 411 times) previous topic - next topic

Aux Compressor "knocking"

Our Auxiliary Air Compressor seemed to be getting louder last week. On Friday morning, it got much louder with a distinct "knocking" sound.

A quick check of the compressor on the tray showed the rear two rubber motor mounts had split. I searched for a part number, couldn't find a specific part or source. I looked locally at various shops, nothing. A friend mentioned McMaster-Carr.

Found out these are called vibration-damping sandwich mounts. Looked at McMaster Carr online. Found the exact replacements. These  have 5/16-18 threads on the stud and insert, they are  1" in diameter, 1" in depth.  The part number I used was 9378K16, arrived the next day from Chicago.

Easy fix... Working great again.

Best, Jeff