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Old 04-09-2012, 03:49 PM   #1
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Do Air Cleaners Last Forever?

I have the Farr Ecolite Air Cleaner with a Farr "Filter Minder". It has never read above 10 so far. It has been in place since 2004 according to the date on the unit. The coach only has about 20,000 miles on this air cleaner. The information sheet for the filter says to change it based on the filter minder or once a year.
Based on what I have read here, I should just leave well enough alone .... like forever? OR does there come a time when, like our tires, it is too old and it is time for a new one?
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Old 04-09-2012, 04:16 PM   #2
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I would remove it and examine it very carefully. Do you see any dust in the area in the air intake downstream of the filter? Does the seal look tight, not cracked or deformed? Hold it up to the sun or bright light and see if you see any holes. Can you see the light glow through the filter or is it blocked by dirt.

If you have the dimensions, description, or part# I may have a replacement.
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Old 04-09-2012, 04:31 PM   #3
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If it's never shown over 10 then the filter minder may be bad, but even if good the filter should be replaced every two years or so.
My filter minder shows 15 with a new filter and has gone up to just over 20 when run hard. Have a Banks kit so I suspect the extra air being pushed in makes a difference. I'm looking at going to a larger filter and larger diameter inlet pipes. I'm told the CAC is large enough as is.
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Old 04-09-2012, 05:31 PM   #4
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A freightliner rep my friend talked to said to replace filter every two years or when indicator shows its due. The rep said that after two years the glue holding the pleated filter element together starts breaking down.
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Old 04-09-2012, 05:55 PM   #5
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You shouldn't go more than two years. The resin glue that bonds and seals the paper to the canister does deteriorate with time. The paper also can deteriorate in localized spots. This all can cause the filter to not be able to effectively do its job. If a piece of that resin glue cracked off and hit the turbo blades, you would be very unhappy.
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Old 04-09-2012, 06:16 PM   #6
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Agree with the 2 year group.
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Old 04-09-2012, 07:31 PM   #7
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This is one I had direct experience with. We had a Dp on our lot. I went out to start it and move it around the lot. (moving inventory) There was a slight knock in the engine. I went to the boss and suggested we take it to Cat. (it was under warranty) I drove it to to the Cat. service center. They called two days later and said the air filter had never been changed. The filter paper had come apart and was sucked through the turbo and engine. They denied warranty. It was posted on the Cat. computer and could never be covered by Cat. We had to sell the DP at a BIG loss. Take my advice and KEEP THE FILTER CHANGED.
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Old 04-09-2012, 08:38 PM   #8
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In my experience over the years those filter minders are not all that accurate. I pulled filters out of trucks that were absolutely filthy and the minder still showed ok. I would change it every couple years like said above. Cheap insurance.
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Old 04-10-2012, 11:51 AM   #9
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Diesel engines are very susceptible to dust ingestion and rapid damage to the engine. (dusting) The air filters do break down over time and should be replaced. Easy to allow dust into the ducting in the process. Long discussion here by "Spike45" on air filters. (pg2)
Dusted 425 ISL @ 60,000 miles

More in line with your question here:
Page 10

hope this helps...
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Old 04-10-2012, 07:47 PM   #10
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I ran my Farr Eco three years and it was still fine structurally when I pulled it out, but I was losing power for climbing grades. Even though the filter minder said it was fine. I decided to change the filter anyway and was pleasantly surprised to get power back again. By the way, the filter didn't look dirty either - the Minder was not lying. Apparently my filter is barely adequate for the required airflow and even a little dirt is enough to slow the engine down.
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Old 04-10-2012, 07:56 PM   #11
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Quote:
Originally Posted by Gary RVRoamer View Post
Apparently my filter is barely adequate for the required airflow and even a little dirt is enough to slow the engine down.
Probably what I'm running into too. Might get better performance with a K&N or aFe, but they both let in twice as much dust as the stock one. I'm not willing to sacrafice the engine to more dust.
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