Compression Spring (3)| Interlock Pin (1)| Instruction Letter (1)| Output Yoke/Flange Retainer Kit (1)| Snap Ring (11)| Spacer (1)| Spring (3)| Steel Ball (3)| Washer (6)

Not For Use On The ABS Valve Package. Controls Air Pressure To The Brake Chambers. During An ABS Stop, The Modulator Valve Adjusts Air Pressure To The Brake Chamber To Control Braking And Prevent Wheel Lockup. Compatible With All Versions Of Wabco