Patent ID: 6431661
Filing Date: 2002-08-13
Classification: B60T

Abstract:
A brake system for a work vehicle having a supporting structure and ground engaging wheels for propelling the vehicle, the brake system comprising:a source of pressurized fluid; a tandem brake valve having a first flow regulating portion and a second flow-regulating portion, the tandem brake valve having two operator controlled elements for shifting the tandem brake valve; a first brake circuit being in fluid communication with the source of pressurized fluid and the first flow regulating portion of the tandem brake valve, the first brake circuit being provided with a first braking actuator for braking the vehicle, a first hydraulic line extending between the first brake actuator and the first flow regulating portion of the tandem brake valve; a second brake circuit being in fluid communication with the source of pressurized fluid and the second flow regulating portion of the tandem brake valve, the second brake circuit being provided with a second braking actuator for braking the vehicle, a second hydraulic line extending between the second brake actuator and the second flow regulating portion of the tandem brake valve; whereby a pressure equalization hydraulic line extends between the first hydraulic line and the second hydraulic line for equalizing pressure between the first and second hydraulic actuators.