felicello122 Posted August 15, 2015 Share Posted August 15, 2015 I have a 2000 rd, problem is when I pull the trolley, or hit the foot pedal I have air coming out of my service line which is normal if my red, yellow, and blue knobs are in.This happens with them out, when in everything works normal. When bobtailing is the issue, I changed all the valves in the dash thinking I had a bypass, so now I'm leaning towards a tractor protection valve, or maybe a treadle valve, slacks are working, brakes are new and I have no other leaks except when pushing the pedal or trolley with the knobs out. Anyone ever encounter this problem, I hate doing those foot valves? Quote Link to comment https://www.bigmacktrucks.com/topic/41365-air-leak/ Share on other sites More sharing options...
85snowdog Posted August 15, 2015 Share Posted August 15, 2015 Anytime I have had air coming out of the service line without a trailer hooked to it , its been the tractor protection valve. I am with you. I hate changing treadle valves ! So I always start with the easy ones first . TP valves are not very expensive and usually pretty easy to get to. 1 Quote Keith Link to comment https://www.bigmacktrucks.com/topic/41365-air-leak/#findComment-300204 Share on other sites More sharing options...
Swishy Posted August 15, 2015 Share Posted August 15, 2015 yupi have one th@'z bin like th@ for yearsI jist put a coin B ween the 2 gladhands on the truck hoses n all iz OKcya§ Quote Link to comment https://www.bigmacktrucks.com/topic/41365-air-leak/#findComment-300209 Share on other sites More sharing options...
felicello122 Posted August 15, 2015 Author Share Posted August 15, 2015 Yeah I ordered a TP valve this morning, my inside valves were leaking any way, so hopefully Monday I will be leak free thanks guys Quote Link to comment https://www.bigmacktrucks.com/topic/41365-air-leak/#findComment-300219 Share on other sites More sharing options...
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