Moore jig grinder air leak

[wire-op1]

We have a Moore jig grinder, model 450CP, with an air leak. The muffler has air flowing out of
it constantly, and the vertical stroke slows down dramatically the longer the travel. Can anyone
help me on which, if either, of the MAC pneumatic valves is faulty?
Thanks in advance for your help!

 

[Fulcircleny]

I can't help exactly, but shoot Mike at Moore an email. He is super knowledgeable and has always helped me with any issue I have on my #3 JG. He almost always sends me the service bulletin or service procedure on whatever the issue. Best of Luck
Chris

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