I have a 2005 Columbia my air pressure goes up to 140 how do i ajust it to 125 i replace it with a new air governor that said it pre set to 125 still goes to 140 the governor is not adjustable anyone know?
Air pressure goes up to 140
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Shawn19, Jun 3, 2020.
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Most governors are adjustable. Screw off or pull black plastic cap, back off locking nut, turn set screw counter clockwise to lower pressure.
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This one doesn't have a adjustable governor i know what a adjustable governor is i adjust air pressure before on my previous truck.
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Maybe it's not actually the governor that's bad, maybe your gauge is reading wrong.
clausland Thanks this. -
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Could be a blocked up signal line or port from the tank, a gunked up and sticking unloader piston, gauge not working properly etc.
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What's wrong with 140?
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The Anti/lock brake sys.. needs more air to work like it should, so most of the new air reg. are set hi to make newer trucks brake sys. work, so you can run it the way it is.
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It not the gauge had the dash cluster replace an it reading the same it an older truck 2006 i drove 3 other Columbia like this one an they all run at 125
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