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Old 09-24-2015, 09:17 PM   #11
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Well, that would be too bad, but that seems to be what it's pointing to!

I wonder why the compressor would fail so early on? (19k miles)

Oh well. I"ll post back on what I find out!
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Old 09-25-2015, 05:28 PM   #12
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Is it possible that my compressor has an air intake filter, and that the filter is clogged so as to increase the intake pressure, which is in turn increasing the oil blow-by on the compressor?


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Old 09-25-2015, 06:11 PM   #13
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Is it possible that my compressor has an air intake filter, and that the filter is clogged so as to increase the intake pressure, which is in turn increasing the oil blow-by on the compressor?


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Your filter could possibly be clogged needing to be changed but I doubt that someone would have mistakenly used an air intake filter.
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Old 09-25-2015, 06:28 PM   #14
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air dryer could have been bad when it was new
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Old 09-25-2015, 06:57 PM   #15
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Ok, thanks. I guess what I'm asking is, does the compressor have a filter? (Frankly, I'm still trying to locate the compressor!)



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Old 09-26-2015, 10:26 AM   #16
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Some compressors do have a separate filter but these are usually belt driven compressors. If they are gear driven then most likely it is connected into the intake manifold and gets clean air thru the main engine filter. Have you checked your warranty paperwork to see if this may still be covered by the engine manufacturer
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Old 09-26-2015, 11:05 AM   #17
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Some compressors do have a separate filter but these are usually belt driven compressors. If they are gear driven then most likely it is connected into the intake manifold and gets clean air thru the main engine filter. Have you checked your warranty paperwork to see if this may still be covered by the engine manufacturer
Don't know if it would be considered a "drive train component" but FL warranty on drive train is 5 years.

Boowho??
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Old 10-05-2015, 04:50 PM   #18
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Ok, update on this. I got ahold of the testing specs for how to check what's normal blow-by from the compressor.

The procedure is:
Remove the input airline at the dryer
Run the engine at fast idle so that the compressor runs (you'll have to dump your air bags in order to trigger the compressor to come on)
Hold the air line in one place, about 2-3" over a white sheet of paper for 5 minutes
Draw a 2.76" diameter circle around the oil spot
Compare to the attached info from Cummins based on the age of your compressor and the amount of oil on the paper.

I've also attached what mine looked like so you can compare.

So it looks like everything is fine with mine! I'm happy with the results!

Hope this info helps someone else sometime.


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Old 10-05-2015, 06:18 PM   #19
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There's a bit of good news.
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