Mack Metro-Liner air leak in Air Systems and Brakes Posted October 17, 2016 Metroliner CSMR has small air loss at idle and dumps air ( I think from the rear brake circuit ) with just three applications of service brake. The treadle valve has already been replaced . No air leaks in the cab. Reading an earlier post about a Granite seemed similar and it was suggested he had a problem with a "combo valve" ?? Any comments / help appreciated.
Mack Metro-Liner air leak
in Air Systems and Brakes
Posted
Metroliner CSMR has small air loss at idle and dumps air ( I think from the rear brake circuit ) with just three applications of service brake.
The treadle valve has already been replaced . No air leaks in the cab.
Reading an earlier post about a Granite seemed similar and it was suggested he had a problem with a "combo valve" ??
Any comments / help appreciated.