identify & service tips for air dryer

winter is approaching and i am getting some water in my wet tank so i know my air dryer needs to be serviced soon. however i am not familiar with the air dryer on this truck, never had a truck with this style on it so i was going to have a shop do it while i was in for a oil change and the guy that was there at the time was not familiar with my air dryer aether. so i figure i might as well get fimilar with my air dryer and service it myself. im not sure if this air dryer is orrigional to the truck or if its one someone put on at some other time ect. so i need to find out what kind of air dryer i have




im guessing you unbolt the end and slide it out and it will have a filter on the inside like the some of the old benex dryers

 

at was originally bolted with brackets to the underside of the bracket its sitting n now. after almost ripping it off i flipped it to the top side but the straps around it that bolt to the bracket are a little fubar after dragging the air dryer so the bungees are just to keep it from vibrating inside the brackets for now till i do something different with it.

 

i was thinking a bit along that line too. just slapping a complete new setup on there but seems like kinda a waste if all this one needs is a new filter. i guess it depends on what it takes to service this darn thing

and funny you say about exausting the air becouse it actually says that on the cover almost word for word...lol

 

http://www.anythingtruck.com/category/htp-brake-air-dryers-ad9.html

anyone ever buy anything from this place?
any reason to not use a aftermarket ad-9?

edit:

while serching replacement dryers i happened across the dryer on my truck its a
[h=2]Haldex KN33000 Air Dryer[/h]

 

that's kinda my thoughts as well at this point. after i i figured out what i had for a air dryer i found service kits for it and the service kit is $80 and i still have a oddball that no one knows anything about, im thinking i might be better off just putting a ad-9 on