Volvo EC200D - Hydraulic system

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The hydraulic system, known as the "Automatic
Sensing Work Mode" is designed for high-
productivity, high-digging capacity, high-
maneuvering precision and excellent fuel economy.
The summation system, boom, arm and swing
priority along with boom regeneration systems
provide optimum performance.
1 Summation system : Combines the flow of both
hydraulic pumps to ensure quick cycle times and
high productivity.
2 Boom priority : Gives priority to the boom up
function for faster cycle times during loading and
deep excavations.
3 Arm priority : Gives priority to the arm operating
function for faster cycle times during digging and
dumping.
4 Swing priority : Gives priority to the swing
function during trenching application to improve
productivity.
5 Regeneration system : Prevents cavitation and
provides flow to other functions during
simultaneous operations for maximum
productivity.
6 Holding valves : Boom and arm holding valves
are provided to minimize cylinder drifting while
holding loads.
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