need Mack midliner brake help in Air Systems and Brakes Posted May 6, 2015 i have an 1988 ms300. the brakes system needs help. i was going to take to a mechanic but truck will not hold air in the system.. how can i trouble shoot air brakes to find parts and relace them. ???
need Mack midliner brake help
in Air Systems and Brakes
Posted
i have an 1988 ms300. the brakes system needs help. i was going to take to a mechanic but truck will not hold air in the system.. how can i trouble shoot air brakes to find parts and relace them. ???