UPPERSTRUCTURE / Control Valve 1 Figure of Control Valve (Upper) Figure of Control Valve (Lower) Section of Arm Regenerative Valve Section of Overload Relief Valve Main Relief Valve (Refer to Close-Up.) 38 19 42 40 20 45 31 39 46 21 41 43 30 24 44 53 54 36 34, 35 55 33 37 Close-Up of Main Relief Valve Close-Up of Bucket Regenerative Valve W1J1-02-05-046 W2-5-36 Main Valve Relie Bucket Regener Valve ative Close-Up of Overload Reli ef Valve ative Val Close-U Section of Overload Relie Bucket Regenerative Valv f Valve, e 48 49 27, 28 50 26 51, 52 Section of Check Valve-1, Main Relief Valve, Check Valve-2, Flow Combiner Valve Close-Up of Arm Regenerative Valve