Jamied625 Posted December 3, 2012 Share Posted December 3, 2012 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.ThanksJamie Quote Link to comment Share on other sites More sharing options...
mowerman Posted December 3, 2012 Share Posted December 3, 2012 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 bobThanksJamie Quote Link to comment Share on other sites More sharing options...
thomastractorsvc Posted December 3, 2012 Share Posted December 3, 2012 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. Quote Robert"I reject your reality and substitute my own." Link to comment Share on other sites More sharing options...
Jamied625 Posted December 3, 2012 Author Share Posted December 3, 2012 no i cant get air on the sevice side or emergency side and there is air at the flipper valve i connected and the valve was put in with out crossing lines i checked with the old one Quote Link to comment Share on other sites More sharing options...
rsb502 Posted December 3, 2012 Share Posted December 3, 2012 Check the tractor protection valve. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment Share on other sites More sharing options...
thomastractorsvc Posted December 4, 2012 Share Posted December 4, 2012 If you have air to the dash valve, it is probably that valve, is it new or used? you can disassemble and clean and repalce the o ring Quote Robert"I reject your reality and substitute my own." Link to comment Share on other sites More sharing options...
Jamied625 Posted December 4, 2012 Author Share Posted December 4, 2012 its a new valve could it be the peice that the air line connect to at the back of the cab that connect to the trailer? Quote Link to comment Share on other sites More sharing options...
thomastractorsvc Posted December 4, 2012 Share Posted December 4, 2012 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 Quote Robert"I reject your reality and substitute my own." Link to comment Share on other sites More sharing options...
Jamied625 Posted December 4, 2012 Author Share Posted December 4, 2012 ok thanks i will try thatJamie Quote Link to comment Share on other sites More sharing options...
thomastractorsvc Posted December 4, 2012 Share Posted December 4, 2012 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.pdfBendix Air Brake Handbook.pdf Quote Robert"I reject your reality and substitute my own." Link to comment Share on other sites More sharing options...
Jamied625 Posted December 4, 2012 Author Share Posted December 4, 2012 my truck doesnt have maxi brakes will that make a difference in those systemsJamie Quote Link to comment Share on other sites More sharing options...
thomastractorsvc Posted December 4, 2012 Share Posted December 4, 2012 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/ Quote Robert"I reject your reality and substitute my own." Link to comment Share on other sites More sharing options...
Jamied625 Posted December 4, 2012 Author Share Posted December 4, 2012 ok thanks for the info,Jamie Quote Link to comment Share on other sites More sharing options...
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