eddeere Posted August 20, 2020 Share Posted August 20, 2020 I bought a used pusher axle. In checking things out I noticed the quick release valve to the brake chambers had two small lines on some type of object on the intake side. Just wonder what the were for. Quote Link to comment https://www.bigmacktrucks.com/topic/63828-pusher-axle/ Share on other sites More sharing options...
Dirtymilkman Posted August 20, 2020 Share Posted August 20, 2020 That may be a valve for when your axle is lifted the brakes won't apply. I cant remember whT mine looked like but I had one on a truck before. Quote Link to comment https://www.bigmacktrucks.com/topic/63828-pusher-axle/#findComment-459107 Share on other sites More sharing options...
theakerstwo Posted August 21, 2020 Share Posted August 21, 2020 Using it for a dump valve Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/63828-pusher-axle/#findComment-459152 Share on other sites More sharing options...
eddeere Posted August 21, 2020 Author Share Posted August 21, 2020 If I understand this when you apply the brakes the axle would lift once the pressure was removed from the air bags. It has air up and down upon looking at it. I am new to this. . Just trying to figure things out. Thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/63828-pusher-axle/#findComment-459183 Share on other sites More sharing options...
JoeH Posted August 22, 2020 Share Posted August 22, 2020 I'm clueless, but someone once told me peterbilt triaxles are typically set up that when you set the parking brake the lift axle comes up? No idea if that's true/common setup or not. No Mack I ever drove did that. Quote Link to comment https://www.bigmacktrucks.com/topic/63828-pusher-axle/#findComment-459225 Share on other sites More sharing options...
mrgumby Posted August 22, 2020 Share Posted August 22, 2020 1 hour ago, JoeH said: I'm clueless, but someone once told me peterbilt triaxles are typically set up that when you set the parking brake the lift axle comes up? No idea if that's true/common setup or not. No Mack I ever drove did that. Yes we have one set up like that where I work. . 2005. the 1998 isn’t set up that way Quote Link to comment https://www.bigmacktrucks.com/topic/63828-pusher-axle/#findComment-459229 Share on other sites More sharing options...
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