Patent ID: 8118113

Claim:
A hydraulic control system, comprising: a first motor; a second motor; a pump operatively associated with the first motor; a first coupling valve operatively associated with the second motor; first parallel valves operatively associated with the second motor; a first switching valve operatively associated with the first coupling valve and the first parallel valves, the first switching valve being configured to switch the first coupling valve between a first coupling state and a second coupling state opposite the first coupling state and to switch the first parallel valves between a first parallel state and a second parallel state opposite the first parallel state, wherein while the first parallel valves are in the first parallel state a portion of the output of the first motor drives the second motor and while the first parallel valves are in the second parallel state a portion of the output of the pump drives the second motor; and an internal flushing system operatively associated with the pump, wherein while the first parallel valve is in the first parallel state the internal flushing system directs a balanced flow to opposing inlets of the second motor to allow the second motor to freewheel.