teleman Posted September 18, 2012 Share Posted September 18, 2012 On the front of the treadle valve there is a small angled fitting in the upper front del. port....I checked an extra foot valve that came with the truck and it is the same way.I need to know where this 1/4 inch line goes and its function since it only has air when the brakes are applied.The only thing thats not hooked up is the slippery/dry valve on the dash and it has no lines on it.....Does anyone know how the slippery/dry limiter valve on the frame works?Which is the normal braking...with air to the limiter valve or with out air....getting closer...Thanks Jim Quote Link to comment https://www.bigmacktrucks.com/topic/27391-treadle-valve-and-slipperydry-switch/ Share on other sites More sharing options...
Maddog13407 Posted September 19, 2012 Share Posted September 19, 2012 should be a line comin out of treadle to the front brake valve for your air pressure but this should be a 3/8 line... have to look under mine tomorrow if i rememebr and take a pic. i forget how the lines run now, been a while. Quote Link to comment https://www.bigmacktrucks.com/topic/27391-treadle-valve-and-slipperydry-switch/#findComment-138328 Share on other sites More sharing options...
teleman Posted September 20, 2012 Author Share Posted September 20, 2012 I went over to Larrys " freightrain" and we were able to trace those air lines on his B 61....The small air line on the foot valve" upper front" supplies air to the slippery/dry valve on the dash when the brakes are applied...the line coming off the valve goes to the front brake limiting valve on the inside frame rail under the cab...Thanks Larry Quote Link to comment https://www.bigmacktrucks.com/topic/27391-treadle-valve-and-slipperydry-switch/#findComment-138514 Share on other sites More sharing options...
Freightrain Posted September 27, 2012 Share Posted September 27, 2012 No problem Jim. Glad to be of assistance. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/27391-treadle-valve-and-slipperydry-switch/#findComment-139379 Share on other sites More sharing options...
Dennis Posted October 13, 2012 Share Posted October 13, 2012 Thanks, Guys. I was trying to figure this out on my B753 also. I guess I have it plumbed wrong. I plugged the line at the treadle and hooked air from the air block to the slippery/wet lever. Then from there to the limiting valve under the cab. I didn't think it was working right. Quote Link to comment https://www.bigmacktrucks.com/topic/27391-treadle-valve-and-slipperydry-switch/#findComment-141431 Share on other sites More sharing options...
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