Jump to content

Tractor Protection Valve And Air Lines


Recommended Posts

I have an 85 dmm straight truck with the air valve handle on the steering wheel. It doesnt have a tractor protection valve but I would like to add one and lines to the rear for a trailer. where can I find a schematic and the parts for adding the trailer brakes. What parts do I need to add?

Edited by noroots
Link to comment
Share on other sites

  • 1 month later...

I have the same problem. I hve a 2005 CV713 tri-axle dump with anti-lock and ATC. The ATC is what causes the problem. I have found the air line diagram but part numbers to add the trailer lines are not there. From what I can tell, I need the Park Brake Control Module and the Tractor Protection Manifold along with assorted lines and fittings. Is there a part list somewhere for this conversion. The dealerships seem to think so but I can't get them to get off their butts and help me (Been trying for almost a year :angry: ). I'll do the work myself if I can find what parts I need. Thanks in advance.

Link to comment
Share on other sites

Hi all, I have been hinking about this for a while myself, I don't think it would take much to do this.

1st. I think you would need a foot valve for a tractor type truck, (so you would have an air line going to the trailer service) as well as a line going to the hand valve for the trailer brakes (service). As for part numbers, I'm lost. Just trying to think what it would take to turn a straight truck into a tractor/trailer.

I think for just the emergency, you could go from an air tank to the control valve on the dash, but for the service, it would need to have a pedal valve to go to the service line as well, unless there is a plugged port for the trailer service line.

Maybe you could have a dealer check the part numbers to see if they are the same , or different. (for a truck verse tractor)Pedel valve

I hope this helps some.


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...