Just read in MH mag..

lj2654 wrote:
Not really true. If you have the air release valves and open them to bleed some air out and have a lot of water coming out, yes, time to change. Depending on where you live and humidity and dampness makes a big difference.

I recently did mine but had no water from valves. Just changed to do being 2nd owner and wanted to have for recording maintenance.

y

I respectfully disagree with this. I checked mine this way, and had no moisture cme out so I thought all was ok. A few months later, I ended up on the side of I-10 with no air pressure because the drier gave out. If I had done the regular drier maintenance, I wouldn't have broken down.

Not all motor homes have an air dryer. I am sure all do that have air
brakes. However, my coach has air bags and air compressor but no air dryer. I get some water out when draining the air tank and have never had any problems with the air system. My coach is 15 years old and for the most part better than it was when new.
Busyguy

Service/replace air dryer for TWO reasons:

Has failed= water, dirt or desiccant powder present in air tank drain.

But, just as important, every 3-4 years service to prevent desiccant breakdown allowing powder into the air system. Every couple of months, will read about air system contamination from failed air dryer. VERY time consuming and expensive if that powder gets in the air valves, air suspension and air brakes.

It IS routine maintenance.

As long as you are not getting water from the air bleed valves you're good.

It does make a difference as to the type climate where the motor home spends most of it's time. However had a friend who did not change the dryer filter and his rusted so badly he had to change the entire cannister, it would have been far less expensive to change the filter on some sort of regular vasis.

I changed mine at 8 years...about $35. Screw in cannister. No biggie....Dennis

Not really true. If you have the air release valves and open them to bleed some air out and have a lot of water coming out, yes, time to change. Depending on where you live and humidity and dampness makes a big difference.

I recently did mine but had no water from valves. Just changed to do being 2nd owner and wanted to have for recording maintenance.