VEHICLE BRAKING FROM TWO POSITIONS

摘要

A fluid pressure operable vehicle braking system includes a service brake circuit and a parking spring brake circuit operable by service and parking valves (1) and (5) respectively at a normal driving position as is a changeover device (17) operation of which closes a valve (13) in the spring brake circuit to prevent release thereof from the normal driving position and which changeover device at the same time enables both a valve (11) which actuates the service brake and a valve (15) via which an alternative release pressure can be applied to the spring brakes both the latter valves then being controllable from a remote position for off-road operation.