350GLC - EXCAVATOR 21 Vehicle Main Hydraulic System Parts group 21 Vehicle Main Hydraulic System 2161 Hydraulic Pumps & Drives . Hydraulic Pump Mounting Hydraulic Pump Components Hydraulic Pump Rotating Group Hydraulic Pump Regulator Components Pilot Pump Components 2162 Hydraulic Selective Control & Load Holding Valves . Control Valve Control Valve Hardware and O-Rings Control Valve Body and Spools, 4 Spool Side Control Valve End Caps, 4 Spool Side Control Valve Body and Spools, 5 Spool Side Control Valve End Caps, 5 Spool Side Control Valve Mounting Brackets 2164 Hydraulic Reservoir, Filter & Cooler . Hydraulic Oil Reservoir Select group 21 Vehicle Main Hydraulic System John Deere: 2161 Hydraulic Pumps & Drives 2162 Hydraulic Selective Control & Load Holding Valves 2164 Hydraulic Reservoir, Filter & Cooler