2.
HYDRAULIC CIRCUIT 9 10 11 4 P T FRONT REAR B.D/F B.U IN OUT RH LH LH RH LH RH 19 17 1 3 4 2 1.1 2.1 BL1 BR1 BL2 BR2 6 CL CR 8 T1 P1 T2 P2 L R 3 L1 L2 L1 L2 T T 15 15 P EF 3B 14 B 16 7 21MPa B1 B2 A1 A2 PP T P3A 3A Boom up Boom down P3B A HP LS HT 5 2B 2A 24MPa 18 PS A3 T1 L R P2A Roll back Dump P2B F2 13 B 1B 1A 24MPa 24MPa F1 18 PS1 P1A 24MPa 24MPa P1B 12 U P T P T LS P 21MPa 4.5MPa T 20 P1 P2 3MPa 1 2 23 22 26 24 27 25 T P C 21 7807AWE01 6-2 1 Main pump(+Brake pump) 10 2 Steering pump(+Fan pump) 11 3 Main control valve 12 4 Remote control valve 13 5 Steering unit 14 6 Flow amplifier 15 7 Cut off valve 16 8 Brake valve 17 9 Steering cylinder 18 Bucket cylinder Boom cylinder Pilot supply unit Line filter Safety valve Accumulator Accumulator Pressure switch Pressure switch 19 Pressure switch 20 Line filter 21 Fan drive motor 22 Oil cooler 23 Air breather 24 Strainer 25 Hydraulic tank 26 Return filter 27 Bypass valve