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not getting air to the trailer


Jamied625

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In my 68 R-600 i am not getting air to the trailer when the brakes are applied the trolley and tredal valve. I have replaced the little flipper valve that is to allow air to the trialer with the brakes are applied or not applied there is a small hiss that comes out of both air lines. What could my problem be.

Thanks

Jamie

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In my 68 R-600 i am not getting air to the trailer when the brakes are applied the trolley and tredal valve. I have replaced the little flipper valve that is to allow air to the trialer with the brakes are applied or not applied there is a small hiss that comes out of both air lines. What could my problem be.it sounds like you got the lines crossed try swapping them,,if thats not it,,then its probably your three way valve,,,uner trailer,,look for something that looks like starship iterprize.lol.good luck bob

Thanks

Jamie

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when the the trailer brakes are charged at the dash valve does air gush out of the emergancy side? if not unhook the emg side on the deck to see if you get air there/ when you replaced the valve is it possible the lines got crossed do the same with the service side using the johnny bar.

Robert

"I reject your reality and substitute my own."

 

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Check the tractor protection valve.

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if you disconnect the air supply at the tractor / trailer valve at the back of the cab check each side as I previously stated all you have to do is disconnect the line going for the emg side charge the system like you normally would, you should have a constant rush of air, you can do the service side the same but use the johnny bar you need to locate the valve that you are not getting air to than figure out if it is a line issue or valve issue

Robert

"I reject your reality and substitute my own."

 

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heres a trouble shoot sheets, just determine if your truck has a secondary system, if its a single system it is a little different, I am up for ASE re certs in January and this what I will probably use as my study guides.

tractor_air_brake_troubleshooting_guide.pdf

Bendix Air Brake Handbook.pdf

Robert

"I reject your reality and substitute my own."

 

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no, your truck is probably then a single air system, if you read the thread I wrote about adding spring brakes to my b61 you will see the drawings for a single air system. If you do want to add them for parking on one axle you just add the air line, since yours is a single air system http://www.bigmacktrucks.com/index.php?/topic/24092-b61t-upgrade-to-springbrakes/

Robert

"I reject your reality and substitute my own."

 

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