Stop Light Switch for Air Brakes Ref 13240A H-30591

Emergency Stop Light Switch for Air Brakes H-30591Reference # 13240APort: 1/8" NPTtechnically it is the brake light switch or the stop light switch, working with the air pressure in the system. Emergency word comes from the general terminology within the users.DESCRIPTIONThe stop light switch is an electro-pneumatic switch andoperates in conjunction with the brake valve and stop lightsby completing the electrical circuit when a brake applicationis made.OPERATIONWhen a brake application is made, air pressure from thebrake valve enters At approximately 5 psi, the air pressure overcomes the force of the spring and movesthe piston or plunger until the contact points close completingthe stop light electrical circuit and lighting the stop lights.SpecificationsThe PP-DC parking control valve is a push-pull, dashboard mounted valve that is manually operated.Fully tested for automatic "pop" pressures, and proper crack pressures.