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Old 09-23-2019, 06:50 PM   #1
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Air filters

I have a 2004 Fleetwood discovery 39S. I cannot find the chassis air filters. Also, what needs to be changed? Any help is appreciated.
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Old 09-26-2019, 09:30 AM   #2
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Engine or HVAC filter?
If you have an 8.1 Workhorse chassis, don't put one of those "lifetime" filters in. There is a chance the oil impregnated in the element can get on the MAF sensor and cause trouble.
Happy Glamping.
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Old 09-26-2019, 09:53 AM   #3
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If you are talking about the engine air filter, it's a metal can in the back by the engine. Hard to miss. Locate the air intake on the left rear sidewall and follow the air intake tube to the filter can. It has a Farr-Eco filter inside.



If you are looking for a cabin air filter for the HVAC system, there probably isn't one.
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Old 09-26-2019, 11:30 PM   #4
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I am referring to the air system for the air brakes and air ride suspension in a diesel. Is it just the desiccant filter, or are there others?
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Old 09-26-2019, 11:40 PM   #5
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Air compressors draw air in from the engine intake. There is no seperate filter, unless you have 1970's or older BW compressor! Old truck mechanics will get that.
Happy Glamping.
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Old 09-26-2019, 11:43 PM   #6
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Should be just the one desiccant cartridge. That's all I've ever seen or changed on my three DP's.
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Old 09-26-2019, 11:56 PM   #7
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Info from Freightliner on servicing the two types of air system dryers that they've used over the years.
Attached Files
File Type: pdf Air Dryer Maintenance web version.pdf (161.5 KB, 9 views)
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Old 09-27-2019, 06:13 AM   #8
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Quote:
Originally Posted by Unplanned View Post
Air compressors draw air in from the engine intake. There is no seperate filter, unless you have 1970's or older BW compressor! Old truck mechanics will get that.
Happy Glamping.
Yup, the little round filter on the side of the compressor.
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Old 09-27-2019, 07:26 AM   #9
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Yup, the little round filter on the side of the compressor.
You got it.
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Old 09-27-2019, 11:23 PM   #10
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Originally Posted by Skip426 View Post
Info from Freightliner on servicing the two types of air system dryers that they've used over the years.
Thanks. This helps.
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