hitachi — BAIC Hydraulic System Service Manual PDF - HX300L Technical Guide (EN)

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HYDRAULIC CIRCUIT (2/2) ( ,P05) 2 E T 10 40 36 37 35 37 26 41 P2 PS 24 ( ,PDbc) 2 ( ,C) 32 35 37 40 37 36 58 41 24 ( ,P05) 2 ( ,C) 32 ( ,PDbc) 2 B P T A2 A1 A3 G.P G.P P T A1 A2 A2 A1 A3 P2 PS C 39 (1) (2) T B 26 T Pi1 V2 ( ,T1) 2 ( ,A) 32 ( ,B) 32 [FLOW CONFLUX] [POWER BOOST] [PEDAL SAFTY] ( ,A1) 21 P1 1 C [FLOW CONFLUX] [POWER BOOST] [PEDAL SAFTY] ( ,A1) 21 P1 31 13 14 E a3 PG 2 ( ,T1) ( ,Ca) 2 ( ,Da) 2 ( ,e) 25 16 [OPTION CONF.] PDbc BC1 Dr B1 B3 Dr3 A3 13 14 PDbc 2 BC1 ( ,A3) 41 DR9 BC2 69 16 A C ( ,A3) 41 DR9 BC2 Cco T M LS 56 ( ,P2) 41 32 B Cco Co CoR P Co CoR ( ,2) 39 ( ,A2) 41 B C B1 P05 Do B A ( ,A2) 41 P05 Do ( ,P2) 41 ( ,1) 39 A A1 PDo PCo DoR 13 14 PDo PCo DoR ( ,a) 25 ( ,b) ( ,e1) 25 25 51 32 OPTION LCo 16 LCo A1 A2 A3 T B1 B2 B3 (Swing CCW) (Swing CW) ( ,PDs) ( ,PCs) ( ,SH) 3 2 2 50 ( ,PDo) 2 A1 3 1 Main pump 2 Main control valve 3 Swing unit 8 Boom cylinder (LH) 9 Boom cylinder (RH) 10 Arm cylinder 13 Check valve 14 Check valve 16 Oil cooler 22 Pressure sensor 24 Pressure sensor 26 Last guard filter 27 Lasr guard filter 30 Boom safety lock valve (LH, option) 31 Boom safety lock valve (RH, option) 32 Arm safety lock valve (option) 35 Accumulator (option) 36 Accumulator (option) 37 Stop valve (option) 39 2-way pedal (option) 40 3-way joint (option) 41 Solenoid valve (option) 44 Solenoid valve (option) 48 Solenoid valve (option) 50 Solenoid valve (option) 51 Solenoid valve (option) 56 Proportional valve (option) 58 2-EPPR valve (option) 68 Pattern change valve (option) 69 Gear pump (option) 36 24 37 35 37 A2 PS T P MA MB ( ,A1) 21 BC1 2 48 V2 ( ,T1) 2 PDbc DR9 44 A B 13 14 BC2 B T 16 Cco P A Do P05 Co CoR PDo PCo DoR ( ,A1) 50 OPTION LCo 8 9 22 30 30 E PS 68 A B E D H J F G T Pi1 Pi1 Pi1 CAT/JohnDeere/ISO/Hitachi V2 a e h f g j d b ( ,A2) 21 ( ,PBb1) 2 ( ,Bb) 2 ( ,Ab) 2 3-2 30Q9-47100-00 2OF2 OPTIO N