UPPERSTRUCTURE / Control Valve 36 W1V7-02-05-019 W2-5-38 7 6 5 4 8 13 12 8 1 11 7 17 Main Relief Valve 18 19 Overload Relief Valve 20 (Arm: Rod Side) 22 23 24 30 20 20 25 27 21 28 Arm Anti-Drift Val 37 29 38 31 32 39 26 33 28 34 Check Valve 40 35 (4-Spool Side Parallel Circuit) 41 8 45 47 46 Left Tra 50 Auxiliary Boom 2 51 Arm 1 52 51 Swing