One way to tell that this is the case is to listen for a large amount of air escaping from behind the red and yellow brake knobs on the dashboard.
Red and blue air brake lines.
If broken or disconnected loss of pressure au.
Blue is used for the service lines and red for the emergency lines.
Reversing the air lines will remedy this problem.
Road king truck parts 15 ft nylon coiled air line set with gladhands and handles.
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Road king truck parts 3 8 air brake line hose end repair kit.
12 black rubber with red emergency grip.
Pick up a set of red and blue rubber air lines and know that they will last all the way down those long roads.
12 black rubber with blue service grip.
If you accidentally hook the air lines up backward the trailer will not move even with the brake knobs in the disengaged position.
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As per tony s answer they are air supply hoses known here as a suzy.
One red is for supply and emergency fail safe application it fills tanks on the trailer and holds the parking brakes released.
Air would not be available to release the trailer spring brakes parking brakes.
Our custom pre packaged brake kits are designed to provide manufacturing solutions for trailer manufacturers assemblers and maintenance facilities.
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Red and blue rubber air line set.
Air brake systems are three braking systems combined.
15 red and blue coil coiled air line hose set trailer brake 1 2 fittings.
If the driver were to cross the air lines supply air would be sent to the service line instead of going to charge the trailer air tanks.
2 x 12 leads.