Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Other Ford Engines > 401, 477, & 534 SD Engines
Sign in using an external account
Register Forgot Password?


Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 08-15-2009, 11:19 PM
94Sport5sp 94Sport5sp is offline
Freshman User
 
Join Date: Jun 2008
Posts: 37
94Sport5sp is starting off with a positive reputation.
Air Dryers

Hi:

Anyone familiar with air dryers? I recently acquired a Bendix AD-IP dryer which I would like to add to my 73 Ford 900. In reading the info on this dryer it refers to a heater/thermostat connector which need to be connected to the ignition kill switch. The info does not explain what this heater does. Can anyone elaborate?

Thanks
PaMnd
Reply With Quote
  #2  
Old 08-16-2009, 12:00 AM
fixnair's Avatar
fixnair fixnair is offline
Posting Guru
 
Join Date: Sep 2004
Location: Bakersfield Ca.& Anaheim
Posts: 1,543
fixnair has a very good reputation on FTE.fixnair has a very good reputation on FTE.fixnair has a very good reputation on FTE.fixnair has a very good reputation on FTE.
fixnair
Is this on an air brake system? It is probably a heated regenerative dryer. When in use the dessicant charge absorbs the moisture in the air. When the dessicant becomes saturated with moisture it will not absorb any more water. You can restore the dessicant by heating it and the heat will drive the moisture out to atmosphere. You usually need a small (15% of design capacity) amount of dry compressed air purging through it for a few minutes to regenerate it.
Not all dessicants are able to be regenerated. Some become usless after absorbing water.
__________________
2002 F350 7.3 Ltr. 6sp.DRW 270K miles, 13' service body
1952 F1 flathead Project Truck
2008 Lincoln MKX

need thermostat housing & cab 4 project
Reply With Quote
  #3  
Old 08-16-2009, 11:15 AM
94Sport5sp 94Sport5sp is offline
Freshman User
 
Join Date: Jun 2008
Posts: 37
94Sport5sp is starting off with a positive reputation.
Hi:

Thanks for the reply. Yes the Ford does have Air Brakes. Currently I empty the air tanks daily. The system only seems to get moisture during cold weather operation.

The manual for the dryer indicate that the AD-IP dryer does a purge of contaminants when the compressor starts. Here is a quote from the manual:

"PURGE CYCLE
As air brake system pressure reaches the cutout setting of
the governor, the governor unloads the compressor (air
compression is stopped) and the purge cycle of the air dryer
begins. When the governor unloads the compressor, it
pressurizes the compressor unloader mechanism and the
line connecting the governor unloader port to the AD-IP ™ air
dryer end cover control port. The purge piston moves in
response to air pressure causing the purge valve to open to
the atmosphere and the turbo cutoff valve to close off the
supply of air from the compressor (this will be further
discussed in the Turbo Cutoff Feature section). Water and
contaminants in the end cover sump are expelled
immediately when the purge valve opens. Also, air which
was flowing through the desiccant cartridge changes direction
and begins to flow toward the open purge valve. Liquid oil
and solid contaminants collected by the oil separator are
removed by air flowing from the purge volume through the
desiccant drying bed to the open purge valve."

As you can see there is no mention of a need for the heater in the above. Later on the manual describes how to test the heater but no mention of why or when to use it.

Thanks for the info.
PaMnd
Reply With Quote
  #4  
Old 08-31-2009, 09:43 PM
94Sport5sp 94Sport5sp is offline
Freshman User
 
Join Date: Jun 2008
Posts: 37
94Sport5sp is starting off with a positive reputation.
Hi:

I have been reading up at various sites and I think I have an idea of what the heater purpose is.

According to the documentation the IP integral purge will discharge the contaminants when the truck starts.This is automatic to the air dryer. My theory is that in cold weather if the IP is triggered on startup and the IP is frozen then damage to the dryer could occur. The heater then is there to make sure the IP is not frozen when the purge occurs. After the truck reaches normal temperature then the heater is not needed.

PaMnd
Reply With Quote
  #5  
Old 09-03-2009, 05:29 PM
Mustang6147's Avatar
Mustang6147 Mustang6147 is offline
Posting Guru
 
Join Date: Mar 2007
Posts: 1,186
Mustang6147 is gaining momentum as a positive member of FTE.
Make sure the air dryer is mounted lower then you tanks (air)
__________________
06 SuperDuty 4x4 extcb 5.4, TorqShift, 4:10.
90 Mustang 9's, 750 HP Windsor. Ultratech Chassis
http://www.youtube.com/watch?v=pibt-TVgAx4

Reply With Quote
  #6  
Old 09-11-2009, 09:35 PM
94Sport5sp 94Sport5sp is offline
Freshman User
 
Join Date: Jun 2008
Posts: 37
94Sport5sp is starting off with a positive reputation.
Hi:

I have been doing some reading on mounting the air dryer and can find no mention on mounting lower than air tanks. The one diagram I have shows the tanks lower than the dryer. Other than that there is no specific on mounting position. Also the tanks are mounted at frame level so getting lower would leave the dryer below the frame.

Thanks
PaMnd
Reply With Quote
  #7  
Old 12-31-2009, 04:39 AM
mokehill151's Avatar
mokehill151 mokehill151 is offline
New User
 
Join Date: Apr 2008
Location: Big Bear
Posts: 9
mokehill151 is starting off with a positive reputation.
The main thing is to mount the dryer below the inlet line from the compressor and keep the line as straight as possible to keep water from condensing and freezing in the inlet air line. I am installing one in my C950 as I have had a few too many treadle valve freeze ups and hope this will help along with insulating the valve and heating it with water from the engine. The dryer heater will cycle as needed to keep the discharge valve from also freezing up.
Reply With Quote
  #8  
Old 01-02-2010, 09:15 PM
94Sport5sp 94Sport5sp is offline
Freshman User
 
Join Date: Jun 2008
Posts: 37
94Sport5sp is starting off with a positive reputation.
Hi:

The outlet from the compressor becomes the inlet to the air dryer. Keeping this line higher and following a slight downward trend would make sense to allow moisture to collect in the air dryer.

Thanks for your thoughts.
PaMnd
Reply With Quote
Old 01-02-2010, 09:15 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Other Ford Engines > 401, 477, & 534 SD Engines

Tags
ad4, adip, air, compressor, dessicant, dryer, f350, ford, governor, location, manual, photo, restoring, truck, turbo, valve

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 05:57 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup