Graver Mach AT Leak (New Unit)

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Jun 28, 2011
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Thread starter #1
Just wondering if anyone has had any internal leaks on their mach AT units. My compressor wont run for days with the mach turned off, but if I turn it on my compressor will run every 5 minuets even though I'm not using the hand piece. It seems it uses air just to have the hand control activated, but even with that turned off and the knob in foot position, it leaks.

Unfortunately I'm at work during hours I could contact GRS for help so I thought I'd drop a post till I can get to them.
 

Beathard

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#2
Do you have the accessory output on the lower right turned on? Are all of the hoses, especially the foot pedal, pushed all of the way in? BTW, I'm having the same issues. Called today and this is what they asked me to check tonight.
 
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Thread starter #3
Yeah, all lines are tight, bias is screwed all the way in and the aux is off as well. I didn't mention before, but I can hear air hissing within the unit and you can feel air coming out screw holes. Sound like I have a problem or is that hiss normal?
 

Beathard

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#4
Mine is doing it too, but it's only three weeks old. I have no idea if its correct or not l. Hopefully someone will help. If not I will call GRS tomorrow and tell them there are two of us with the same issue.
 

Beathard

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#6
If they can't solve it on the phone this week, they will see it next week when I attend the firearms class.

There is supposed to be a leak, but this one is obsessive.
 
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Thread starter #7
HUH?! Yeah let me know what you find out and if I can call tomorrow I'll post my findings. I wouldn't think 2 gallons of air should leak out every 5 mins, couldn't afford that electric bill....
 

sam

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#9
Might be a loose air hose or bad fitting. Dab some soapy water on all your fittings from the compressor to the Mach and see if you can find a leak. If not, then it must be inside the machine. Call JB Taylor at Glendo for assistance.
 
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Thread starter #10
It's in the machine for sure. No leaks up to the mach. Only leaks when turned on and the solenoid is powered. Then I can feel air pouring out of the screw holes from within the unit. I'll ask for that name if I can get a chance to call Glendo tomorrow. Thanks Sam

Beathard is your leak internal as well?
 

Beathard

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#12
Got 1 of two fixed. I thought it was inside, but it was a hole just inside the connector for the hose from the compressor to the system. Soap trick located it. Second problem is in the pedal. GRS asked me to take the entire system next week when I go to class. They plan on tuning it for me and fixing the pedal leak.

My sales guy also said you should call JB.
 
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