Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
Hi Keith, My name is***** will be glad to try to help. Disconnect the air line to the cylinder and check that there is air getting to it. Then apply shop air to it after adapting an air fitting to it to see if the chamber is leaking internally and needs replacement. It is spring applied and air pressure released. If the diaphram is leaking inside air pressure will not overcome spring tension to release the brake. The chamber is not servicable without a press and safety equipment as the spring force in the chamber is deadly if released. Remove and replace with new. Let me know
thanks for the update. Can you get me the complete model and chassis info? I am in the US so I am hoping I can cross the information. Can you upload some pictures using the paperclip icon above? One of the truck and then the park brake cylinder.
I did a lot of digging and cant find anything in my archives of manuals on the park brake setup. I will opt out to open this up for the other experts as they might have something on this system to help.