| 摘要 |
A control for a hydraulic circuit includes a manifold housing and a movable member disposed in the housing. The manifold housing can include a brake port and a pressure port. The brake port is in fluid communication with an associated spring applied-pressure released brake. The pressure port is in fluid communication with an associated pump. The movable member moves between a first operating position and a second operating position when pressure is not being applied to the pressure port. In the first operating position, the movable member is disposed to allow fluid communication between the associated pump and the associated brake. In the second operating position the movable member is disposed to prohibit fluid communication in a first direction from the associated brake toward upstream the associated pump while allowing fluid communication from upstream the associated pump toward the associated brake in a second direction. The manifold housing can also include first and second motor ports. In this embodiment, each motor port is in fluid communication with an associated motor. In the first operating position, the movable member is disposed to prohibit fluid communication between the first motor port and the second motor port. In the second operating position the movable member is disposed to allow fluid communication between the first motor port and the second motor port.
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