John C Posted May 14 Share Posted May 14 I am in the process of changing 10 airbags, noticed two airbags has rust inside, also a few airlines has rust to. I know I need to change the air dryer, how about the airlines with rust in it? am I supposed to change that too? is anything I need to check besides that? Please advise. Thank you. 1 Link to comment Share on other sites More sharing options...
Ivan K Posted May 14 Share Posted May 14 Wow, getting the system clean is going to be a nightmare unless the moisture came from leveling compressor and did not backfeed into the whole brake system, that would be lucky. Still painful to see though. 1 Link to comment Share on other sites More sharing options...
John C Posted May 14 Author Share Posted May 14 1 minute ago, Ivan K said: Wow, getting the system clean is going to be a nightmare unless the moisture came from leveling compressor and did not backfeed into the whole brake system, that would be lucky. Still painful to see though. Wow! I didn't realize it is that serious! How do I explain that only two bags has this problem? does that means it rust is only in a certain area? how do I check if the brake system is rusted or not? Thanks! Link to comment Share on other sites More sharing options...
Ivan K Posted May 14 Share Posted May 14 Only two bags, I suppose there would be a theoretical situation when only those two bags on same axle end needed aux compressor air to keep level. Or were they already wet when installed. Good thing they seem dry, where did the moisture go... I would probably remove a hose or looked into a valve on a main tank to check and see. Uncharted territory for me. 1 Link to comment Share on other sites More sharing options...
vito.a Posted May 14 Share Posted May 14 Just clean any lines or fittings you're working on and service the dryer. That's about all you can do. Link to comment Share on other sites More sharing options...
John C Posted May 14 Author Share Posted May 14 Both were on the front passenger side, losing all air in a couple of days. I will follow the airlines tomorrow. Thank you 1 Link to comment Share on other sites More sharing options...
TomV48 Posted May 14 Share Posted May 14 (edited) WOW. Sitting here in So Cal feeling so smug that that can only happen in a wet climate. Yikes you are here too. Here is what my book says "Regeneration - The mild backflow of air through the air dryer and out the purge valve that begins immediately after the purge and lasts normally 10 to 15 seconds. This backflow of air, from the air system and through the air dryer, removes moisture from the desiccant cartridge and prepares the air dryer for the next compressor load cycle." We have had the coach for over four years and I just changed our desiccant cartridge last year. Old maintenance records do not tell me if it had ever been done. My book says every 2 to 3 years, when compressor is changed or if there has been water in the tanks. Two years ago I found the air/water release valves and never so much as a wisp of moisture. I guess I have been lucky Edited May 14 by TomV48 typo 1 Link to comment Share on other sites More sharing options...
John C Posted May 14 Author Share Posted May 14 16 minutes ago, vito.a said: Just clean any lines or fittings you're working on and service the dryer. That's about all you can do. How do you clean the airline? Maybe it take less time to just replacing it? 6 minutes ago, TomV48 said: WOW. Sitting here in So Cal feeling so smug that that can only happen in a wet climate. Yikes you are here too. Here is what my book says "Regeneration - The mild backflow of air through the air dryer and out the purge valve that begins immediately after the purge and lasts normally 10 to 15 seconds. This backflow of air, from the air system and through the air dryer, removes moisture from the desiccant cartridge and prepares the air dryer for the next compressor load cycle." We have had the coach for over four years and I just changed ours last year. Old maintenance records do not tell me if it had even been done. My book says every 2 to 3 years, when compressor is changed or if there has been water in the tanks. Two years ago I found the air/water release valves and never so much as a wisp of moisture. I guess I have been lucky I already bought a new air dryer. Will replace it Thursday. Link to comment Share on other sites More sharing options...
TomV48 Posted May 14 Share Posted May 14 john I missed my point. Is your system blowing off pressure through that system after you come up to full pressure and do you blow off air from the Spit valves once in a while. I think the book says purge water from air tanks drain valves monthly more or less depending upon humidity Link to comment Share on other sites More sharing options...
John C Posted May 14 Author Share Posted May 14 1 hour ago, TomV48 said: john I missed my point. Is your system blowing off pressure through that system after you come up to full pressure and do you blow off air from the Spit valves once in a while. I think the book says purge water from air tanks drain valves monthly more or less depending upon humidity Yes, now I remember I read that on the manual a while ago, that is definitely another to do. Thank you. Link to comment Share on other sites More sharing options...
jacwjames Posted May 14 Share Posted May 14 Just a question Do you have a small compressor that keeps the coach level while parked. If so does it have any type of air water separator or way to condition the air. Does it have a way to drain water?? I think that the front main tank has a wet and dry side that has a check valve internally. Not sure how a small compressor ties into the air system. 3 Link to comment Share on other sites More sharing options...
Dr4Film Posted May 14 Share Posted May 14 The HWH Aux Air leveling Compressor has a small air dryer built into the system. However, I think the 2007 Dynasty uses the Valid Air Leveling System which I have no idea whether it came with an air dryer or not. Link to comment Share on other sites More sharing options...
John C Posted May 14 Author Share Posted May 14 1 hour ago, jacwjames said: Just a question Do you have a small compressor that keeps the coach level while parked. If so does it have any type of air water separator or way to condition the air. Does it have a way to drain water?? I think that the front main tank has a wet and dry side that has a check valve internally. Not sure how a small compressor ties into the air system. It has been parked at my house for the last 4 months since I bought in AZ, there is a the auxiliary tank in the back on P.S side, no sure if it is also responsible for the front, the fuse was bad when I checked, after I replaced the fuse it only ran a few times. but not very long, I was going to change airbags & rebuild 6 pack first , so this was put on the back burner. 48 minutes ago, Dr4Film said: The HWH Aux Air leveling Compressor has a small air dryer built into the system. However, I think the 2007 Dynasty uses the Valid Air Leveling System which I have no idea whether it came with an air dryer or not. When I rebuild 6 packs and 4 pack, I noticed there were quite bit rust inside it too. but not as many as the two airbags. I was wondering where there are coming from at that time. Looks like the rust is definitely in the system, no sure why the other 6 airbags don't have any rust in it? Link to comment Share on other sites More sharing options...
Paul J A Posted May 14 Share Posted May 14 Bet the desiccant filter was never changed. Link to comment Share on other sites More sharing options...
John C Posted May 14 Author Share Posted May 14 29 minutes ago, Paul J A said: Bet the desiccant filter was never changed. Bet a lot of things were never changed! I am surprised the original airbags last so long! Link to comment Share on other sites More sharing options...
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