rmodelowner Posted February 23, 2013 Share Posted February 23, 2013 Hello all! I have a 76 R model. With the spring brakes released i have a slow leak and when I apply the service brake i have a huge leak out the bottom of the treadle valve. I understand that a leaking valve could be back flow from a leaking brake spring brake pot. The truck was recently in for a safety and they told me one pot was leaking and another had a broken spring so those have both been replaced. I guess the other ones could be leaking but i doubt it cause they would've told me. Does this sound like the treadle itself??? I'd just hate to replace it and not solve the problem as it looks super tight to get everything off of the treadle to get it out.Any tips or suggestions much appreciated. This sight has helped me a lot just from being a silent onlooker. Quote Link to comment Share on other sites More sharing options...
Freightrain Posted February 24, 2013 Share Posted February 24, 2013 Welcome to the site.Can you determine where the leak is coming from on the treadle? The valve itself or a maybe a fitting? Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
rmodelowner Posted February 24, 2013 Author Share Posted February 24, 2013 Thanks:) Its coming right out the exhaust on the very bottom. Before i realized that i changed the brake switch valve and re taped all the fittings thinking it was that. Quote Link to comment Share on other sites More sharing options...
rmodelowner Posted March 5, 2013 Author Share Posted March 5, 2013 It was the treadle valve... all fixed:) Quote Link to comment Share on other sites More sharing options...
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