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Inversion Valve TR2
What does the inversion valve do? Does it have a piston with 0 rings in it is it 2 way? The inversion valve has a Green supply at the top that goes to Primary tank, then has 5 black 1/4 inch lines going to the inversion valve, 1 goes to Tag lift valve (TW1) output, has 2 black 1/4 lines on a tee that go to Left and right R-12 relays at control port for tags, has 2 more 1/4 line to left and right Norgren valves inside inner frame by tags. So when you lift tags the inversion valve sends air to 3 Norgren valves 2 on driver side and 1 on passenger side on inner frame by tags so they deflate tag bags and sends air to air pots that lift tags, I get that, then the 2 lines that go to left and right R-12 tag relays that tell relays to do what?? Brakes?
2nd How do the tag service brakes work on the tags axle , looking at schematics the control port on tag R-12 relays get air from the inversion valve, the tag brakes do work as service brakes??
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