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Old 04-26-2013, 01:34 PM   #1
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how often do you really drain your air tanks?

i'm just curious as to real-life usage from owners on how often they drain the air tanks. per the manual, you should do this daily. i have drained mine every night after i park it for the night so far. i've asked a few diesel rig owners and they didn't even know where their tanks were...

in my workshop, i drain my air compressor tanks completely after every use and do see water coming out the bottom. i don't have an air dryer on my workshop compressor, just the tank, so i try to be very diligent on upkeep.
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Old 04-26-2013, 02:09 PM   #2
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I think rather then how often do you drain, how far/miles do you drive before you drain. If you're driving only 100 miles or so probably not enough moisture in the tanks if there's and air dryer in the system to get more then a drop out of the tanks.
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Old 04-26-2013, 02:11 PM   #3
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It scares me to think what my garage compressor(not purged in 3 years) and my Berks air tanks(not drained in a year) look like inside. Probably alot of rusty water in there. There are just too many things that have unrealistic maintainance intervals that I'm lucky to keep up with my oil changes.
Will
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Old 04-26-2013, 02:54 PM   #4
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Quote:
Originally Posted by lindy View Post
I think rather then how often do you drain, how far/miles do you drive before you drain. If you're driving only 100 miles or so probably not enough moisture in the tanks if there's and air dryer in the system to get more then a drop out of the tanks.
distance won't have a thing to do with moisture in the air... if the compressor is ran and it fills the tanks, there is some moisture in there. even with air dryers and moisture ejectors, there will always be some that makes it's way into the tanks... just physics and science that us mortals haven't been able to conquer completely yet
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Old 04-26-2013, 03:04 PM   #5
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I drain my garage compressor after every use and same with the portable one I keep in the FW. I do see water/moisture come out when the humidity is high. Just simple preventive maintenance.
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Old 04-26-2013, 03:09 PM   #6
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I maintain 18 diesel trucks and our rule is to drain the air tanks at every fillup. We have the drain valve pigtails by the filler cap so its easy to reach down and pull them.

Critical to drain in the winter because the moisture will freeze in the airlines and make braking a little difficult!!!!!
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Old 04-26-2013, 03:41 PM   #7
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I drain, probably 4 times a month or before and during any long trips.
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Old 04-26-2013, 05:39 PM   #8
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I leave the petcock on the bottom of my shop air compressor cracked so it has a slow drip. Not sure if this would be wise on the MH tank seeing as we rely on it for our brakes.
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Old 04-26-2013, 11:09 PM   #9
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I believe my manual states the air tanks need drained every six months. I'll have to take another look!
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Old 04-27-2013, 10:44 AM   #10
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Do they cover this topic at Camp Freightliner. I'm supposed to attend next month and hope they do.
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