Air Dryer

[dreamchasers]

My research has indicated that my coach has a Bendix AD-9, P/N 065224 air dryer. My thought was to replace it with a new dryer, order the components to rebuild the one I removed and hold it as a spare.


Any experience with a good suppliers for a new Bendix Air Dryer? I am seeing prices ranging from $450 and up for a new Bendix.

Any comments are welcome.

Hector

[Jon Wehrenberg]

Hector, Why not just replace the cartidge and service the dryer? Most dryers have kits for service.

Unless I have a problem I just replace the cartridge.

[dreamchasers]

Jon,

The purge valve is leaking and/or the check valve. I have noticed over the last few weeks when leaving the coach unattended, the primary and secondary air supplies would depressure. I have ordered and received both check valves for the primary and secondary air tanks and would like to have the air dryer in good shape also.

This is probably an overkill having a spare air dryer, but I am trying to minimize the time the bus is out for repairs.

Where do you buy your parts for the air dryer overhaul?


Hector

[Jon Wehrenberg]

Truck Pro or Fleet Pride. I'm sure you have a truck parts house in your area.

The online Prevost service manual likely has the details relating to the rebuilding or repairing of your dryer. You can probably get the kit from Prevost, but they have not been competitive on too many things.

The only time I did repairs was on my 87 coach in the early 90s. It was the type that had the snap ring and three bolts to hold the cartridge. Not the spin on cartridge I have now. I can't remember a thing about it except replacing some parts. The memory fades.

[jimshoen]

My air dryer failed also.
Do not bother trying to rebuild it.
Buy a new one, check pricing at Prevost.
They were competative.
Previous owner did not change filter timely.

[dalej]

I just go down to my Fleet Pride and buy a cartridge and put it in. It's a very simple maintaince issue. I bought a new relief valve and put in when the older one got to leaking. I think it's around 40-50 bucks.

I will replace this valve every other time I change filters as to not have a problem with rust again.

[0533]

For us challenged members, would it be possible to walk us through the filter change out, where it is, how to access it and what parts are needed. How to get started.

[dalej]

Start reading on page 6 and 7 of the following link...

http://www.bendixvrc.com/itemDisplay.asp?documentID=3604

[0533]

Start reading on page 6 and 7 of the following link...

http://www.bendixvrc.com/itemDisplay.asp?documentID=3604
Excellent, thanks Dale.

[Jon Wehrenberg]

That is not the type found on Bruce's coach. I don't know what year Prevost started using the type with the spin on cartridge, but since Bruce's bus is newer than mine I feel confident he has the same spin on type that I have.

This is an excellent document for those with that type dryer.

This might be more appropriate for Bruce's coach:

http://www.meritorhvs.com/MeritorHVS_Documents/mm34.pdf

[Orren Zook]

Here is some representative pricing for your reference, new AD9 $231, AD9 cartridge $38, AD9 check valve $34, AD9 rebuild kit $16, AD9 purge valve $59 (be advised the heater element in the purge valve comes in either 12v or 24v so order accordingly). Don't forget to mention your POG membership at the vendor to get your association discount!

[dalej]

Sorry Bruce, I was thinking you had the AD-1. You can find the AD-9 on the Bendix site as well.

[0533]

Sorry Bruce, I was thinking you had the AD-1. You can find the AD-9 on the Bendix site as well.
There is no excuse for this level of incompetence. Just kidding, thanks for the help, it is always welcome.

[Jon Wehrenberg]

FWIW my bus is a Wabco Meritor and uses cartridge S-432-923-2 (possibly Baldwin BA 5374)

[Orren Zook]

Jon - from Meritor/Wabco the dryer cartridge retails around $36 - less your POG discount it would be $30. I'll check for a Baldwin cross and the pricing on a complete unit later today when I get back to the office this afternoon.

[Jon Wehrenberg]

Orren, I'm working on my order. I assume if I don't have the Baldwin number you can cross NAPA and others?