Service Your Air Dryer

NDT · Jul 22, 2018

Current civilian Haldex mentioned earlier finally installed on 915 slick. 916/920 is the same. Unit does not fit too well in this spot, but it fits. Needed a 8" longer piece of 5/8" airbrake tube to get to the tank.

SUPERSPORT · Jul 25, 2018

simp5782 said:
https://r.tapatalk.com/shareLink?ur...share_tid=175982&share_fid=20191&share_type=t

M923 Wabco Series 1200 Air Dryer Install

Sent from my SM-G965U using Tapatalk

When searching the auction site, they all say "replaces Wabco 1200". I even noticed some looked different in the pictures. Are they knock-offs?

Floridianson · Jul 25, 2018

I don't believe there would be knock offs but what I look for is all the ports are in the same place. I did my MTV and got a NOS one cheap from a member here and all I had to do was add a bushing to the control line port. All my lines had the correct length and hook up with no problem. If the ports are not in the same place you might find you have to reroute or add more line to reach the ports.

allie · Mar 24, 2019

is this an easy job to do how does it come off?
thanks
al

Anvilface · Mar 24, 2019

Allie, it's not hard to do. There are 4 9/16s bolts holding the unit to the bracket. Or you can loosen the band and remove the small bolt on the bottom of the bracket. Unhook all the lines, and unplug the heater.

Once it's out, you can remove the dust cover from the heater (on the bottom). There is a snap ring inside that holds the plastic valve in place. The dessicant can on top spins off like a regular oil filter type. I would suggest removing that before removing the whole unit from the truck though. They are supposed to be hand tight only, but it seems that with age it feels like they were all installed by Hercules.

Clean that bugger out, wash everything well. New canister, and plastic purge valve...you should be good to go.

simp5782 · Mar 24, 2019

allie said:
is this an easy job to do how does it come off?
thanks
al

Replacing the old standard air dryer can be cheaper than rebuilding it due to parts costs.

https://www.steelsoldiers.com/showt...TV-Air-dryer-replacements-upgrades&highlight=

allie · Mar 24, 2019

Anvilface said:
Allie, it's not hard to do. There are 4 9/16s bolts holding the unit to the bracket. Or you can loosen the band and remove the small bolt on the bottom of the bracket. Unhook all the lines, and unplug the heater.

Once it's out, you can remove the dust cover from the heater (on the bottom). There is a snap ring inside that holds the plastic valve in place. The dessicant can on top spins off like a regular oil filter type. I would suggest removing that before removing the whole unit from the truck though. They are supposed to be hand tight only, but it seems that with age it feels like they were all installed by Hercules.

Clean that bugger out, wash everything well. New canister, and plastic purge valve...you should be good to go.

Great tips. I thank you!!

Al

allie · Mar 24, 2019

I’m thinking Napa might have a replacement I’ll try in the morning.thanks!!

SUPERSPORT · Mar 24, 2019

allie said:
I’m thinking Napa might have a replacement I’ll try in the morning.thanks!!

I think they have the PURest that everyone was upgrading with but it's like $334.
Is that the one you are looking at?

I was ready to order one for the convenience, direct fit. Plug and play. It comes with the adapter plate also.

allie · Mar 24, 2019

Didn’t wanna spend that much. Maybe rebuild. What about original replacement

simp5782 · Mar 24, 2019

allie said:
Didn’t wanna spend that much. Maybe rebuild. What about original replacement

Original rebuilds are pricey. The part numbers are in the spreadsheet

A turbo 2000 unit off Ebay in my thread is around $200 shipped

allie · Mar 25, 2019

fuel leaking

Have another issue with this canister leaking fuel maybe it’s an O ring?

simp5782 · Mar 25, 2019

allie said:
Have another issue with this canister leaking fuel maybe it’s an O ring?

There is no o ring. Pull it out and put a pipe plug in it

allie · Mar 25, 2019

What exactly is this. It has power going to it. Is it a fuel shut off? Put a pipe Plug it where?

simp5782 · Mar 25, 2019

allie said:
What exactly is this. It has power going to it. Is it a fuel shut off? Put a pipe Plug it where?

Pull the whole unit out. It is not needed

allie · Mar 25, 2019

If I can do that without issues I will. Do you know what it’s for though
thanks
al

Floridianson · Mar 25, 2019

allie said:
If I can do that without issues I will. Do you know what it’s for though
thanks
al

For the diagnostics of the PT and engine. If I remember that port was rail pressure. I can't remember the short letters used for the scan tool. Sure someone will know the correct letters. STEC/something something??? Plug it as Wes said.

doghead · Mar 25, 2019

STE/ICE

Simplified Test Equipment for Internal Combustion Engines

allie · Mar 26, 2019

Ok so unplug the two power wires unscrew the whole unit and plug it up

doghead · Mar 26, 2019

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