bucket functions performed by the actuators 21 20 and 23 respectively thus the flow losses introduced by the switching valves 29 and 30 will be lower in the swing function than in the boom stick or bucket functions sharing the bucket and the offset functions performed by the actuators 23 and 22 respectively allows control of the boom 106 and stick 107 during the operation of the offset function giving the most control possible of the excavator mechanical arm 105 during operation of the offset function it is not desirable that the swing and offset functions performed by the swing motor 28 and actuator 22 respectively share a pump because they both control the angular orientation of the mechanical arm 105 and simultaneous operation of these functions is often desirable in all arrangements the left and right travel functions performed by the motors 26 and 27 are always independent of the other six they never share a pump to allow the excavator 100 full control while driving while displacement control of the travel functions as shown in fig2 is desirable other control methods could be used such as control valves and the motors 26 and 27 could be electric motors or other types of motors that can be or must be controlled by other than variable displacement pumps it should also be noted that the invention can be applied to wheeled excavators as well as the track type excavator represented in fig1 a pump controlled displacement controlled hydraulic system as described above eliminates the need for control.