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Old 09-15-2010, 12:19 PM   #1
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air dryer haldex

has anyone had trouble with this unit ? i cannot find a new cartridge and the popoff stays open so i cant build pressure
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Old 09-15-2010, 01:06 PM   #2
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Quote:
Originally Posted by JT Thomp View Post
has anyone had trouble with this unit ? i cannot find a new cartridge and the popoff stays open so i cant build pressure
What chassis do you have. I had to call Freightliner with my serial number to find out what I had for an air dryer. Good luck.
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Old 09-15-2010, 01:28 PM   #3
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Quote:
Originally Posted by JT Thomp View Post
has anyone had trouble with this unit ? i cannot find a new cartridge and the popoff stays open so i cant build pressure
This info may help you!


Air Dryer Maintenance
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Old 09-15-2010, 02:38 PM   #4
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cartridge #dq6050 model#n4253f
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Old 09-15-2010, 03:59 PM   #5
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JT Thomp,

The cartridge #DQ6050 is available from any NAPA parts store. I recently bought one at NAPA for my Alpine Coach.

Here are a couple of other topics on this subject:

Low Air Suspension Issue
Haldex PURest air dryer - ANOTHER part to service !
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Old 09-15-2010, 05:47 PM   #6
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FWIW, the exchange cartridge for the AD-9 Bendix air dryer is only about $23.
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Old 09-15-2010, 06:00 PM   #7
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It sounds as if the cartridge is the least of your problems. If you cannot build enough air pressure to inflate your suspension due to a faulty purge valve you need to fix that first.
You may want to consider replacing the whole air dryer with a rebuilt unit. Ebay often has these units available or you can order online from places such as RyderFleetProducts.
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Old 09-16-2010, 11:05 AM   #8
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Hello JT:

Take a picture of the bottom of your Air Dryer and go a Truck Parts House and they can match your air dryer for a replacement cartridge and rebuilt kit for the spit valve.

Once the air is purged from the coach you can remove the desiccant cartridge and replace it as well as service spit valve.
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