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Old 09-14-2021, 12:14 PM   #1
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Any suggestions for a good diesel mechanic to work on our air system air dryer?

Our 2008 Monaco has been going through 3 new replacement air dryers over the last 6 months. The new air dryer is fine at first, but weeks later starts leaking air while running and off. (I posted a three about it in the Monaco page.) We are going to Cummins in Coburg OR but they said they don't feel with air dryers. They suggested the Rev group, but they no longer actual answer the phone to set up service appointments. Any suggestions for a good diesel mechanic for air systems??? We are traveling through WA and OR.

Thanks,
Les
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Old 09-14-2021, 06:33 PM   #2
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Most any HDT repair shop is qualified to replace an air dryer or rebuild the old one. Personally I would replace as it is usually cheaper and easier. It is usually a DIY job. Instructions are online and come with a new dryer assembly.
The first step is to block under the frame with wood to prevent getting crushed when the suspension is drained of air in the second step. Once all air is drained next is to thoroughly clean the old dryer and surrounding area.
From this point the written directions are clear.
OTOH you may pay ~$135/per hr to hire it done.
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Old 10-16-2021, 04:52 AM   #3
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So are you having the desiccant cartridge replaced or the complete air dryer replaced?

Going to need some specifics on what has actually been replacedÖÖ


Could be as simple as replacement of the purge valve.
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Old 10-16-2021, 05:08 AM   #4
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Sounds like you might have other issues. Compressor pumping oil into the system?
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Old 10-17-2021, 05:57 AM   #5
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Maybe there are other issues than the air dryer. The compressor, air governor?

I had to replace my air dryer recently and if you are at all handy itís a do it yourself project, but that is only if you buy the same brand and style as the one on there, if itís not the same brand you may have mount issues as bolt holes may not line up.

All the air needs to come out so a good idea is to support the frame before you dump the air and airbags, I just used the onboard levelling jacks to hold it up but you do whatever you feel safe doing.
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