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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: travlinman on November 25, 2011, 02:09:28 PM

Title: AD-2 Air Dryer Check Valve
Post by: travlinman on November 25, 2011, 02:09:28 PM
I've got the rest my AD-2 rebuilt but now I am unable to get the check valve out. I've tried a breaker bar on the nut but it will not budge. What am I missing? I just want to be sure that these are actually serviceable? Here is a pic from the outside.

TM
Title: Re: AD-2 Air Dryer Check Valve
Post by: viento1 on November 25, 2011, 03:21:28 PM
That thing is an air dryer? ha ha, I have one too and never paid any attention to it. Is it something I need to service? I guess that is what you are asking... I will wait on others  :)
Title: Re: AD-2 Air Dryer Check Valve
Post by: Joe Camper on November 25, 2011, 05:49:06 PM
viento where do you live?

 Someone needs to come over and give you some 101. I think you may benifit some.

Title: Re: AD-2 Air Dryer Check Valve
Post by: travlinman on November 26, 2011, 08:20:03 AM
Anyone worked on one of these ??
Title: Re: AD-2 Air Dryer Check Valve
Post by: wildbob24 on November 26, 2011, 08:43:53 AM
TM,

They are serviceable; just threaded into the side of the canister. If it hasn't been removed in a while there is probably rust and corrosion involved. Some heat and penetrating oil should do the trick.

Once you have it out the body is comprised of two parts that are screwed together. You separate these to get to the valve's innards.

Bob
Title: Re: AD-2 Air Dryer Check Valve
Post by: luvrbus on November 26, 2011, 08:47:11 AM
What are you trying to do Steve ? that is a integral check valve on a AD 2

good luck  
Title: Re: AD-2 Air Dryer Check Valve
Post by: travlinman on November 26, 2011, 01:01:49 PM
Bob - Thanks for the info, I will give it a good soaking this afternoon.

Clifford - I am in the process of servicing my air drier, got the purge valve rebuilt and the desiccant cartridge replaced. When I tried to remove the check valve it would not budge even with a breaker bar! So I thought I would check in here just to be sure that the valve is removable before I screw something up! Anything else I should know other than oil heat and a bit more muscle?

Thanks Guys,

TM
Title: Re: AD-2 Air Dryer Check Valve
Post by: luvrbus on November 26, 2011, 06:52:52 PM
I don't know if it comes out or not lol I never was able to remove one even with heat don't use to much heat it will warp the seat don't ask how I know that one

good luck
Title: Re: AD-2 Air Dryer Check Valve
Post by: travlinman on November 26, 2011, 09:17:49 PM
After soaking the check valve in penetrating oil for a while and heating it up, I got out the 1/2" impact and let it go to work. It took quite a while but finally the check valve came loose. As dry as those threads were it has never been apart. Now I can use the rebuild kit that I bought!

TM
Title: Re: AD-2 Air Dryer Check Valve
Post by: viento1 on November 27, 2011, 09:48:52 PM
I could definitely use some 101 training. My other bus did not have such a contraption.