Parking brake for unit and trailer - has trailer pneumatic servo operated from handbrake cam

摘要

The parking brake for an agricultural trailer has the parking brake linkage of the tractor fitted with a slotted cam which engages a control lever of the trailer servo brake and applies the trailer brake at the same time. No mechanical connection is required between the tractor and the trailer. The cam control is simple and can be set to be independent of brake wear on the tractor. The trailer brake uses the integral pressure reservoir on the trailer.