Dual Brake valve BS2 repairing with explanation

This is dual brake valve it's having two problem first air leaking from exhaust and brake was releasing late so we dismantled the valve and found main piston was rusted so it was strucking quickly and releasing late and push seal face was diform so we applied the anabond and dry it and cleaned the all parts and re assembled it after Assembling all the problem got solved. It's having one main piston and one Secondary piston both are working togath and two push seal for both front and rear tank and front and rear brake. Port is 11, 12 and 21, 22 11 and 12 port is input pressure from front and rear tank and 21and 22 are output port for front and rear brake applying also its having brake light pressure switch on both output port.

Видео Dual Brake valve BS2 repairing with explanation канала machine point