UPPERSTRUCTURE / Control Valve DISASSEMBLE CONTROL VALVE (4-SPOOL HOUSING UPPER AND LOWER SURFACES) Bucket Regenerative Valve 19 Main Relief Valve 20 38 39 21 40 30 42 41 Arm Regenerative Valve 43 44 Overload Relief Valve 19 31 45 46 47 Check Valve-1 2 3 20 24 56 4 5 21 25 48 49 50 51 52 53 54 55 22 26 27 57 35 7 6 23 28 36 34 10 9 34 35 33 37 11 24 36 37 8 12 13 14 25 26 27 15 29 28 16 18 17 37 36 57 61 59 1 60 18 17 62 65 66 63 16 15 57 67 14 68 13 12 64 11 10 8 Flow Combiner Valve 9 7 6 5 4 Overload Relief Valve 2 3 W1 Ｊ 1-02-05-053 W2-5-26 Chec k Valve-2