SERV1851 02/08
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Text Reference Main Control Valve
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Main Control Valve Group The main control valve group is located in the center of the upper structure of the machine. The main control valve group receives pilot oil signals from the operator controls in the cab. Each pilot signal then causes the appropriate control valve to shift in the correct direction. When a control valve shifts, oil flows from the main hydraulic pumps to the appropriate hydraulic cylinder or hydraulic motor to perform work. The 311D/312D/314D main control valve is similar to the "C" Series valve. The components shown above include: - auxiliary control valve (1) - stick 1 control valve (2) - swing control valve (3) - left travel control valve (4) - right travel control valve (5) - boom 1 control valve (6) - attachment line relief valve (7)
