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Topic: Haldex air dryer  (Read 2083 times) previous topic - next topic

Re: Haldex air dryer

Reply #50 –
Just looking at the positive tite , does the connection depend on copper conductors crushed against each other in a waterproof tube ?
Jimmy
2003 U295 3620

Re: Haldex air dryer

Reply #51 –
Note quite.

There is a metal center conducting post is the middle of the Posi-Tite connector (and in all Posi products except for the Posi-Twist product).  Each end of the copper wire is crushed against that center conducting post.

The gaskets fit between that center post and the outer locking rings on each side to keep water from entering each end.

I've used these in a number of places with great success.  I was first introduced to them when I had to repair the wiring on a set of electric trailer brakes.  I was looking for something that was waterproof, dust proof, vibration proof, and also easy to work with.  I didn't have much of a length of wire to work with on the brake drum side, so I wanted a connection that wasn't going to require me to snip off more wire if I had to redo the connection.  These worked like a charm.

Chris

Re: Haldex air dryer

Reply #52 –
There are also butt connectors that not only have shrink tube on them but also solder inside. You crimp it and the heat applied to shrink also melts the solder to make the connection
Toby a 94 u280
Cummins 8.3
6 speed Allison
Exhaust brake


Adopted by Derek and Annabelle

Re: Haldex air dryer

Reply #53 –
The nice thing about the Posi-Tite connectors was mentioned by Chris: they can be removed and reused indefinitely, without damaging the wire.  Crimp connectors (of any type) are a "use one time" solution, and you sacrifice some wire length each time you replace them.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Haldex air dryer

Reply #54 –
Fitted rebuild unit this morning, went smoothly apart from one elbow that didn't want to move, but a 2ft pipe wrench with extension pipe persuaded it .
Couldn't find any leaks but will check again tomorrow.
Thanks to everyone for advice it's appreciated
Jimmy
2003 U295 3620

Re: Haldex air dryer

Reply #55 –
Quote from: Jimmyjnr –
Fitted rebuild unit this morning, went smoothly apart from one elbow that didn't want to move, but a 2ft pipe wrench with extension pipe persuaded it .
Couldn't find any leaks but will check again tomorrow.
Thanks to everyone for advice it's appreciated

Jimmy,
Was the unit held in its place just by one 9/16 bolt from underneath?  I just removed everything and the bolt and it is wiggling but it is hung somewhere. Your set up and mine are the same. Looks like you had an ok time replacing it. I am struggling a bit in Rock Springs, WY 1000 mil from home.
Thank you,
AL
Former 2003 GV U295 (6230) (2015 - 2025)
Former 94 GV U225 (2013-2016)

Re: Haldex air dryer

Reply #56 –
Jimmy,
Was the unit held in its place just by one 9/16 bolt from underneath?  I just removed everything and the bolt and it is wiggling but it is hung somewhere. Your set up and mine are the same. Looks like you had an ok time replacing it. I am struggling a bit in Rock Springs, WY 1000 mil from home.
While typing this Foretravel just responded to my e-mail with "there are 4 bolts holding the air dryer in place." If i understood it correctly that means to remove  the bracket that is holding the dryer up in place from the chassis rail?  I am hopping there is another way, it just looks like no need to remove the bracket. I removed that one bolt from underneath and it is moving, acting like going to come out but just stuck.
Thank you,
AL




Former 2003 GV U295 (6230) (2015 - 2025)
Former 94 GV U225 (2013-2016)

Re: Haldex air dryer

Reply #57 –
Quote from: propman –
Jimmy,
Was the unit held in its place just by one 9/16 bolt from underneath?  I just removed everything and the bolt and it is wiggling but it is hung somewhere. Your set up and mine are the same. Looks like you had an ok time replacing it. I am struggling a bit in Rock Springs, WY 1000 mil from home.
Thank you,
AL
I recently did mine and IIRC it was held in place by the bolt you mention plus the stainless steel clamp that's around the circumference.
Mark Duckworth
2003 U320 4220
Build 6199, Motorcade 17971

Re: Haldex air dryer

Reply #58 –
If you are struggling you should know that you don't even need an air dryer. As long as you connect the large hoses and cap off the small hose that comes from the governor you can drive and drive and drive until you get home, and replace it at your leisure. I did when I was broken down in the desert. The air will maintain at governor cut in and out just like before. Occasionally bleed off the wet tank drain for water (which you probably won't get. I didn't)
1994 U280, Build 4490
Deming, NM.

Re: Haldex air dryer

Reply #59 –
When I did the bypass, I found it necessary to bleed all three tanks (our non-slide coach has 3 total). The wet tank is easy having the remote drain valve in front of the street side dually, but the front two tanks are a pain unless you are fortunate to have remote bleed valves  there as well (on my project list!). I found a fair amount of water came out of all three after a couple hours or less of driving. And another thanks and shout out to Twig and the others who first posted on where to bypass the dryer back 3 years ago when we were stuck by the roadside. Before seeing his response to my question, I knew I could bypass, but hardly knew where to start the practical process of doing it. When you are out there in the sticks alone, you aren't really alone as long as you can access Foreforum!
Don
Quote from: Twig –
If you are struggling you should know that you don't even need an air dryer. As long as you connect the large hoses and cap off the small hose that comes from the governor you can drive and drive and drive until you get home, and replace it at your leisure. I did when I was broken down in the desert. The air will maintain at governor cut in and out just like before. Occasionally bleed off the wet tank drain for water (which you probably won't get. I didn't)
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Don & Tys
1999 U270 3602 WTFE #5402
Xtreme Stage 1 w/Headlight, Step Conversion, etc.
2009 Honda Fit Sport with Navi
Freedom is NOT "just another word for nothing left to lose"... with apologies to Kris Kristofferson
 

Re: Haldex air dryer

Reply #60 –
We are all fixed up and hope to leave first thing in the morning. Thank you all for your help. Once again Foretravel friends are priceless, you almost make braking down fun  :)
Former 2003 GV U295 (6230) (2015 - 2025)
Former 94 GV U225 (2013-2016)