itsJC Posted September 7, 2022 Share Posted September 7, 2022 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? Quote Link to comment https://www.bigmacktrucks.com/topic/70408-loud-squeak-squealing-when-i-set-my-parking-brakes-pull-out-valves/ Share on other sites More sharing options...
Joey Mack Posted September 7, 2022 Share Posted September 7, 2022 Sounds like the air release is pushing through too small of an exhaust port... Quote Link to comment https://www.bigmacktrucks.com/topic/70408-loud-squeak-squealing-when-i-set-my-parking-brakes-pull-out-valves/#findComment-508772 Share on other sites More sharing options...
fjh Posted September 7, 2022 Share Posted September 7, 2022 (edited) 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 September 7, 2022 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70408-loud-squeak-squealing-when-i-set-my-parking-brakes-pull-out-valves/#findComment-508777 Share on other sites More sharing options...
MACKS Posted September 7, 2022 Share Posted September 7, 2022 My 96 cl always made a heck of a squeal when I engage the parking brake Quote Link to comment https://www.bigmacktrucks.com/topic/70408-loud-squeak-squealing-when-i-set-my-parking-brakes-pull-out-valves/#findComment-508793 Share on other sites More sharing options...
Joey Mack Posted September 7, 2022 Share Posted September 7, 2022 warranty for sure!!! Quote Link to comment https://www.bigmacktrucks.com/topic/70408-loud-squeak-squealing-when-i-set-my-parking-brakes-pull-out-valves/#findComment-508799 Share on other sites More sharing options...
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