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Loud squeak / squealing when I set my parking brakes (pull out valves)


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9 hours ago, itsJC said:

I have a brand new 2023 Mack Anthem. For some reason, when I pull out my tractor and trailer brake valves there is a really loud air squealing noise. It sounds like it's coming from the tractor. Any ideas?

Joe may be right how ever You have a warranty use it bro ! Let the dealer identify it for you! Many times there is a quick release valve on the back of the cab on the emergency line!

Edited by fjh
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