1 Main pump 2 Fan & brake pump 3 Main control valve 4 Control unit 5 Boom lowering valve 6 Control block 7 Remote control lever(EH, FNR) 8 Remote control lever(HYD) 9 Pressure sensor 10 Fan motor 11 Directional valve 12 Hyd oil cooler 13 Safety valve 14 Boom cylinder 15 Bucket cylinder 16 Steering cylinder 17 Steering unit 18 Line check valve 19 Accumulator 20 Orifice 21 Joystick steering lever (opt) 22 Joystick steering valve (opt) Steering sensor(opt) 24 Adapter(opt) 25 Cut off valve 26,27 Accumulator 28 Pressure sensor 29 Brake valve 30 Pressure switch 31 Hydraulic tank 32 Air breather 33 Return filter 34 Bypass valve 35 Strainer assy Motor pump (opt) 37 Check block (opt) 38 Pressure sensor (opt) 39 Check valve (opt) 40 Accumulator (opt) 41 Quick coupler cylinder (opt) 42 Solenoid valve (opt) LS1 P1 T1 M LS2 S1 D 41 2 4 3 1 B A B2 A2 B1 A1 B3 A3 42 A B 30 a3 A1 A2 T/M 11 b3 29 PARKING P T 40 P1 T1 P2 T2 28 PS PS 28 A B G1 P B3 G2 PS 27 26 26 S3 T2 12 15 S2 B2 B1 S1 rollback down dump T1 PP 2 L S1 b2 a2 25 6-2-1 up LH RH 1 3 4 2 P T 1.1 2.1 PS 28 B 9 PS 14 31 B.D/F B.U CRAWD DUMP 33 34 PS 9 a1 5 b1 35 D Pr 8 EH RCV HYD RCV A1 HYD RCV 32 T 3 P3 LS3 DLS T3 P1 EH RCV 24 23 TPr 13 X1 1 L L1 S1 10bar PS B1 37 9 7 20 16 17 E/G T P ( ) :
2spool RH LH Control Unit / Electro Hydraulic, Joystick steering 6(4) 3(2) 5(3) 2(1) x To MCV Boom up B/Down Bucket In Dump Aux Up Aux Down R L LS T P HYDRAULIC CIRCUIT (HL940A TM) HYDRAULIC CIRCUIT (HL940A TM) AUX1 BUCKET BOOM EH20 EH19 EH22 EH21 a3 b3 a2 b2 a1 b1 19 STD : (17) LS ----------------------- DLS (3) J-Steering : (17) LS -- LS2 (22) LS1 -- DLS (3) 18 39 S P P1 M T 7 16 CR CL LS2 L R A LS1 38 PS M EH17 EH18 4 1 T T 36 4 Cut Off EH Valve SOL P 6 22 TE 21 PVE Electronics PE P P3 LS3 DLS T3