Cruiseliner Posted February 2, 2013 Share Posted February 2, 2013 Hi, I have a R 600 with apark brake problem. When you apply the park brake it takes a while to engauge and release. Replaced the brake lever in cab, replaced valve in chassis and problem is still there. Has anyone got any ideas please? Quote Link to comment https://www.bigmacktrucks.com/topic/29758-park-brake/ Share on other sites More sharing options...
GreenGiant2 Posted February 2, 2013 Share Posted February 2, 2013 check for a line that has been kinked or crushed, had that happen on my truck for the trailer air, was very slow to air. gg2 1 Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/29758-park-brake/#findComment-161388 Share on other sites More sharing options...
br549 Posted February 3, 2013 Share Posted February 3, 2013 we had same problem on truck, been a while but there is a double shuttle valve around the back of the cab in the frame, it has a shuttle valve in it that sticks. trace the supply line from the valve it should go to the double shuttle valve. I think it feeds air from two tanks and it get stuck on one side and can't get enought volume. If i remember right it is about 4" long, air line in each end and air line in the middle supplies air to the parking brake valve. Quote Link to comment https://www.bigmacktrucks.com/topic/29758-park-brake/#findComment-161467 Share on other sites More sharing options...
Cruiseliner Posted February 3, 2013 Author Share Posted February 3, 2013 Thanks guys I,ll ckeck it out. Quote Link to comment https://www.bigmacktrucks.com/topic/29758-park-brake/#findComment-161522 Share on other sites More sharing options...
theakerstwo Posted February 3, 2013 Share Posted February 3, 2013 I could be a spring chamber leaking some till its released. Get some one to listen for a leak at the rear while you release the parking parking brakes. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/29758-park-brake/#findComment-161577 Share on other sites More sharing options...
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