... -010 2.Applicable models:the truck can load-bearing 9 tons on rear axle3.Relay Valve for long pipeline at the end, so ... semi-trailer brake systems. In the truck's braking systems, Relay Valve shorten the reaction time and pressure from set-up time ... Cummins flywheel, Cummins Air-drying ASSY,Cummins feed pump,Cummins relay valve,Cummins radiator,Cummins air ompressor,Cummins connecting rod,Cummins platen ...