Air leak, front emergency gladhand, no air at rear gladhands

[Ue413]

Tennmogger,

what at do you recommend if you are not old enough to be a member of aarp?

 

[us4korea]

This is great info. We have a leak on the service side at the front. I capped it off and they brakes locked up. So uncapped and leaking is how we run. Thanks for the part numbers, NAPA here I come!

 

[jmb6741]

Hey Oxy, did you ever find the cause of the air leak to the front glad hand? I just got in a truck doing the same thing and wanted to know which way to start tearing into it. Thanks in advance for suggestions!

 

[Oxyacetylene]

Hey Oxy, did you ever find the cause of the air leak to the front glad hand? I just got in a truck doing the same thing and wanted to know which way to start tearing into it. Thanks in advance for suggestions!

The culprit was one of the two way check valves mounted behind the driver's side step/box. I actually replaced two of those valves so I'm not positive which one was the problem. I replaced the top 2 of the 3 that are mounted in that area. You can rebuild the valves if you would prefer. I see you are in NC...PM me your whereabouts if you are anywhere near the middle and maybe we could meet up sometime. Don't forget the Denton rally too!

Here's a thread I started a while back to help consolidate some of the info that might be helpful. It lists several part numbers in case you need them. http://www.steelsoldiers.com/showthread.php?140345-Air-Brake-Info-and-Troubleshooting

 

[jmb6741]

Found the culprit of my air leak, just as Oxyacetylene said, the top check valve of the three under the cab and behind the step had a hole in the diaphragm. Replaced with new valve and all was good to go! Thanks again! I located the rebuild kit for the haldex 25060 and I will just rebuild on the truck in the future. Since there was nothing wrong with the valve body you can unbolt the valve from the frame and only take off the line that goes into the end with the hex shoulders on it. This saves having to unhook the remaining lines and having to swap fittings to a new valve. The front check valve behind the bumper coming from the gladhand was also taken apart and found full of rust and not moving either. After a quick clean and spray of lube good to go. This is is a easy fix to an annoying problem!

 

[Rage]

Does anyone know the haldex part number for the valve behind the drivers side step box

 

[Oxyacetylene]

Does anyone know the haldex part number for the valve behind the drivers side step box

Look two posts above yours and follow that link. I have the part numbers listed.

 

[coachgeo]

Does anyone know the haldex part number for the valve behind the drivers side step box

in the sticky at the top of this forum is an ever growing/updating part # file. Your liable to find this info there.

 

[jmb6741]

Rage, the valve is a Haldex KN25060
the rebuild kit for that valve is Haldex RN11V

 

[weldergq692000]

Looking for some ideas on what to check. Whenever the System Park is disengaged, air is venting (a lot of it) through the front emergency gladhand. I replaced the one way check valve mounted beneath it on the T fitting, but that didn't help. I have seen some info online talking about replacing the check valve in the gladhand....but does the gladhand itself actually have a check valve?

Also, the rear gladhands are not getting any air. With the Trailer air supply valve set to supply air, does the System Park have to be disengaged for them to work? Maybe if another valve, like the truck protection valve, is faulty it could cause both issues?

Do you remember the part number for the one way check valve?

 

[coachgeo]

Do you remember the part number for the one way check valve?

Have you looked in parts spreadsheet; which one can reach thru the sticky/pinned thread, at top of this forum?

sometimes you gotta search around and learn a different common name for the part... for it may be listed on the sheet by that name instead.

if it is not on the spreadsheet; when you find it let us know here, and will get it added to it for the next person down the line.

pass it on