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Old 09-09-2012, 05:35 PM   #1
src
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air leak

Hi all, Looking for a air leak i have 1 gauge and 2 needle a red and green the green needle is the 1 that is leaking do someone no if the green is front or rear air tank. Thanks
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Old 09-09-2012, 08:07 PM   #2
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From my air brakes course and this reference: "The primary air service circuit is usually coded green, so, in a single-unit, two-needle gauge, the green needle would indicate primary circuit pressure". The primary circuit is usually the rear tank, which supplies the drive axle service brakes. Hope this helps.
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Old 09-10-2012, 07:06 PM   #3
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Dump one tank completely and see which needle goes down.

Lew
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Old 09-10-2012, 07:21 PM   #4
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src.....Maybe a silly question, but have you checked both drain valves. Maybe one got bumped and is leaking. One on the passenger side of the generator and the other on the passenger side of the hitch.
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Old 09-11-2012, 05:31 PM   #5
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Yes valves r good. Air up and green needle will go down to 60lb and stop in about 4 hours red will b at 120lb. Just a shot in the dark dose someone have a air leak detector i can rent or used i will paid the shipping to mass.
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Old 09-11-2012, 06:23 PM   #6
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Get yourself a squirt bottle and mix some dish-washing soap and water in it. Spray all fittings liberally and look for bubbles. I had both lines going to the dash air gauge leaking. Last place I looked. Had to replace both fittings (available at NAPA) to fix it.
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