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SU Vacuum Leaks. It’s not always the shaft bushings

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Some things just become matra’s. 

With SU’s, people ask you how to know if the ones they have or are about to buy, are worth anything, and the “Standard Response” is “wiggle the shafts and see if there’s play” as they cause a vacuum leak. Then we typically add to that “get Z-Therapy to rebuild with their cool sealed shaft bearings”. End of discussion

Well as I’ve come to discover there is another nasty vacuum leak area of concern on SU’s that I think is JUST as prevalent as shaft wear. The nozzle fit in its sleeve is often very worn.


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