COMPONENT OPERTATION / Control Valve Cross Section C-C Cross Section D-D Swing 10 3 1 5 T450-03-03-016 T450-03-03-023 1 - Bypass Shut-Out Valve 13 - Load Check Valve (Boom 2 Parallel Circuit) 24 - Check Valve (Main Relief Pressure Flow combining Circuit) 35 - Overload Relief Valve (Bucket Roll-Out) 2 - Arm Regenerative Valve (Switch Valve) 14 - Boom Regenerative Valve 25 - Check Valve (Bucket Flow Combining Circuit) 36 - Overload Relief Valve (Bucket Roll-In) 3 - Check Valve (Arm 1 Roll-Out Parallel Circuit) 15 - Overload Relief Valve (Boom Mode) 26 - Check Valve (Auxiliary Flow Combining Circuit) 37 - Boom Flow Rate Control Valve (Switch Valve) 4 - Load Check Valve (Arm 1 Roll-In Parallel Circuit) 16 - Boom Overload Relief Control Valve 27 - Check Valve (Bucket Flow Combining Circuit) 38 - Boom Flow Control Valve (Poppet Valve) 5 - Load Check Valve (Swing Tandem Circuit) 17 - Load Check Valve (Auxil- iary Tandem Circuit) 28 - Flow Combiner Valve 39 - Overload Relief Valve (Boom Lower) 6 - Load Check Valve (Arm 1 Tandem Circuit) 18 - Overload Relief Valve (Auxiliary) 29 - Check Valve (Flow Com- biner Valve Circuit) 40 - Overload Relief Valve (Boom Raise) 7 - Arm Regenerative Valve (Check Valve) 19 - Overload Relief Valve (Auxiliary) 30 - Check Valve (Main Relief Pressure Flow Combining Circuit) 41 - Boom Anti-Drift Valve (Switch Valve) 8 - Arm Anti-Drift Valve (Check Valve) 20 - Load Check Valve (Auxil- iary Parallel Circuit) 31 - Main Relief Valve 42 - Boom Anti-Drift Valve (Check Valve) 9 - Arm Anti-Drift Valve (Switch Valve) 21 - Load Check Valve (Left Travel Tandem Circuit) 32 - Load Check Valve (Bucket Parallel Circuit) 43 - Check Valve (Arm Make-Up Circuit) 10 - Overload Relief Valve (Arm Roll-Out) 22 - Bypass Shut-Out Valve 33 - Bucket Regenerative Valve (Switch Valve) 44 - Arm Flow Rate Control Valve (Switch Valve) 11 - Overload Relief Valve (Arm Roll-In) 23 - Load Check Valve (Left Travel Parallel Circuit) 34 - Bucket Regenerative Valve (Check Valve) 45 - Arm Flow Rate Control Valve (Poppet Valve) 12 - Load Check Valve (Boom 2 Tandem Circuit) T3-3-9 Arm 2 Arm 1 2 8 9 44 6 45 40 11 40 11