3. WORK EQUIPMENT HYDRAULIC CIRCUIT 3. WORK EQUIPMENT HYDRAULIC CIRCUIT 40 S1 S2 760F6WE02 1 Main pump 3 Main control valve 4 Remote control valve (EH type) 5 Remote control valve (FNR type, opt) 10 Safety valve 11 Shuttle valve 12 Boom cylinder 13 Bucket cylinder 21 Hydraulic tank 22 Air breather 23 Return filter 24 Bypass valve 25 Strainer 27 Check valve 28 Pressure sensor 39 Control unit 40 EH control block 41 Boom lowering valve 6-3 13 12 28 PS RH 28 PS a2 a3 LS 3 T P a1 A1 B1 A2 B2 pst A3 B3 Floating Aux Bucket Boom 4 Joystick Dump Down 5 9 Control unit Bucket Boom Aux back (Electro-Hydraulic & Joysick steering) Roll Up EH18 EH17 EH20 EH19 EH22 EH21 T P 4 1 6(4) 3(2) 5(3) 2(1) ( ) :
2 Spool b1 A2 B2 To MCV b2 LH b3 12 a3 b3 a1 b1 a2 b2 41 A1 Steering valve 27 27 10 (EHPS) EF port Steering valve (EHPS) LS port S1 X1 X2 P1 T 11 X3 Return line 28PS1 X1 X2 22 Return line ring system 23 B1 B2 24 25 21 S1 L2 L1 S2 L4L3 Fan & brake pump 12 28 PS RH 28 PS a3 LS A3 B3 A1 B a2 1 A2 B2 pst Dump Floating Down Bucket back Roll Up Boom Aux