HX220SL.pdf hyundai (EN)

SECTION 3 HYDRAULIC SYSTEM Group 1 Hydraulic Circuit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1 Group 2 Main Circuit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-3 Group 3 Pilot Circuit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-6 Group 4 Single Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-14 Group 5 Combined Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-24

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GROUP 1 HYDRAULIC CIRCUIT SECTION 3 HYDRAULIC SYSTEM 30Q6-47100-00 1OF2 2 10 11 8 9 1 Main pump 2 Main control valve [BOOM UP] [ROD] [HEAD] ( ,P04) 2 ( ,h) 25 ( ,j) 25 ( ,PaL) 2 ( ,P02) 2 ( ,PDb2) 2 [ROD] [HEAD] ( ,PAb1) 2 [BUCKET OUT] [BUCKET IN] ( ,PDa) 2 ( ,PAb1) 2 [BOOM DOWN] ( ,C) 12 ( ,g) 25 ( ,f) 25 ARM2 ARM2 (ARM OUT) (ARM REGEN CUT) (BREAKER) (UNLOCK SIGNAL) [BOOM UP] PBk PAk ( ,PCbc) 2 PBa2 [ARM IN] PAa2 DR6 P02 Abk PBa (ARM IN) PBrc PAbk DR4 Bb Ab PBb1 PAb1 Pi1 Bk Ak P04 DR2 PbL Btr Atr BUCKET BUCKET ARM REGEN ARM REGEN BOOM BOOM NRV2 NRV2 Cck BbkR CRb ( ,Pi2) 1 ( ,Pi1) 1 ( ,P3) 21 Pn1 Pn2 NRV1 NRV1 BkR AkR LCk2 LCk1 LCa2 LCar BbR LCbk AbR LCb BtR P5 P4 Rs BOOM2 SWING P/R SWING P/R [S/M MAKE UP] ( ,MU) 3 BC1 BC2 Cco CoR DoR LCo CaR DaR LCa LCs E 3-1 OPTION ARM ARM Ccb SWING SWING (RIGHT) TRAVEL TS TS P1 1 16 26 20 23 CRa ( ,Pn2) 2 PS 24 34 13 ( ,PAk) 2 [BUCKET IN] PCbc [BUCKET CONF.] PDbc [OPTION CONF.] DR9 Co P05 Do PDo PCo Ca Da DR7 PaL [UNLOCK SIGNAL] PCa PDa ( ,PAa2) 2 PCsp ( ,c) 25 ( ,PAb1) 2 PDb2 ( ,VA) 3 Cs Ds PCs PDs DR5 P03 DR3 Ctl PCtl Dtl PDtl PS DR1 P01 PS 24 [HEAD] [SWING PRIORITY] [BOOM UP PILOT] [ROD] ( ,PBa) 2 ( , d ) 25 [ARM OUT] ( ,VB) 3 Dr MA 4 4 ( ,e) 25 [ARM IN] ( ,PCtl) 2 [RH-BW] 21 REG REG VB(FW) VA(BW) 12 ( ,Atr) 2 ( ,Btr) 2 ( ,Ctl) 2 ( ,Dtl) 2 ( ,A3) 21 [TRAVEL] (3) (4) (1) (2) ( ,PAtr) 2 ( ,PDtl) 2 [RH-FW] A1 A2 P T FC1 FC2 ( ,P) 34 ( ,P01) 2 ( ,Psv) 1 ( ,A3) 1 C A D B Dr P ( ,A1) 21 26 P T ( ,PBtr) 2 [LH-BW] ( ,P) 7 ( ,P) 6 ( ,P) 5 ( ,PG) 3 R/H L/H Ps Ps MA MB 26 5 26 6 7 [LH-FW] P4 P3 P2 P1 VA(FW) VB(BW) a b d e f g h j d1 h2 24 24 PS ( ,PBb1) 2 [BOOM DOWN] [SWING] [ARM] [BUCKET] [BOOM] P T P T (1) (3) (2) (4) (3) (1) (2) (4) A B E D H J F G c h1 PS PS ( ,PAb1) 2 [BOOM UP] A1 A2 A3 MB ( ,A1) 21 ( ,A1) 21 ( ,PBk) 2 [BUCKET OUT] [BUCKET IN] ( ,P03) 2 ( ,P) 12 ( ,Pu) 2 1.

HYDRAULIC CIRCUIT (1/2) ( ,e1) 25 PG ( ,RS) 2 24 ( ,PCa) [ARM IN] ( ,PAk) 2 SH MB MA MU (CW)VB VA(CCW) ( ,Cs) 2 ( ,Ds) 2 e1 e2 PS 24 2 ( ,PDa) 2 [ARM OUT] R/G ( ,SH) 3 PS ( ,PDs) 2 [SWING CW] A5 AU 3 DR ( ,PCs) 2 [SWING CCW] ( ,PCsp) 2 PS [SWING PRIORITY] 21 T 25 BC2 Cco CoR DoR OPTION LCo CaR DaR CRa ARM LCa NRV1 BkR AkR BUCKET LCk1 LCk2 BbkR ARM2 LCa2 ( ,PDa) 2 PAa2(ARM OUT) DR6 Ccb BOOM2 SWING P/R LCar ARM REGEN LCbk BbR AbR CRb SWING LCs (RIGHT) TRAVEL BOOM P LCb BtR AtR (LEFT) TRAVEL TS MRV 15 18 19 E Dr

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36 37 37 37 41 41 ( ,A1) 50 ( ,2) 39 ( ,P2) 41 ( ,1) 39 ( ,T1) 2 13 14 16 ( ,A2) 21 40 36 ( ,T1) 2 13 14 16 A B E D H J F G a e h f g j d b B C 2.

HYDRAULIC CIRCUIT (2/2) 10 51 B1 B2 B3 ( ,PDs) ( ,PCs) ( ,SH) 3 2 2 31 ( ,Ca) 2 ( ,Da) 2 ( ,a) 25 ( ,b) ( ,e1) 25 25 A1 A2 A3 (Swing CCW) (Swing CW) 2 48 B T P A CAT/JohnDeere/ISO/Hitachi E T Pi1 V2 ( ,e) 25 T P4 68 CK VALVE> ( ,P05) E 10 36 B40 37 37 35 26 P T 41 A1 A2 P2PS( G .P 2 4 ,C) A3( ,PDbc) 36 40 37 3735 A5 18 A2 A1 41 A2 P2( P ( S G ., P 2P ,0 C 45 )) A3( ,PDbc) 32 2 2 32 2 2 P C 39 B T 27 ( ,T1) ( (1 ,A) ) ( ( 2 ) ,B) [PEDAL [POWER [FLOW T P(1 ,A1) C PT 1 31 SAFTY] BOOST] CONFLUX] 1 [ SP AE FD TA YL ] [ BP OO OW SE TR ] C[F OL NO FW LUX] ( ,A1) 2 32 32 21 E 21 14 13 Dr A3 ( ,Ca) 16 BC1 B1 B3 a3 28 2 BC1 2 SC [OPT (IO N ,C AO 3N )F.] PDbc 28 69 A1 ( ,A3)PDbc 41 SC 41 DR9 BC2 LS M ( ,P2) CA DR9 BC2 41 Cco T 56 32 B B1 Cco P G BY FORCE> ( ( ( , P ,, 12 2 )) ) ( ,A2 CB A) A1B1 P P PC D0 C D5o o o o C Do oR R B A 14 13 ( ,A2)P P PC D0 C D5o o o o C Do oR R 4139 39 41 41 ( 2 5 ,e1) 51 32 OPTION LCo 16 OPTION LCo A3 B2 B3 ( 2 ,PDs) ( 3 ,SH) (Swing CW) 50( ,PDo) 1 Main pump 2 A1 3 2 Main control valve 36 3 Swing unit 37 3735 A2 PS24 8 Boom cylinder (LH) COUPLER> T P ( ,A1) MB MA 19 0 B Ao rmom cy c liy nl din ed rer (RH) 21 BC1 13 Check valve 14 Check valve PDbc 44 16 Oil cooler 48 ( ,T1) DR9 BC2 B A 22 Pressure sensor 2 24 Pressure sensor 14 13 Cco 26 Last guard filter T B 27 Lasr guard filter P A 16 Co CoR 2 38 0 C Boo ou mpli n sg a fs ec tyre low ck valve (LH, option) P D05 o 31 Boom safety lock valve (RH, option) ( ,A1) P PC Do o DoR 3 32 5 A Ar cm cu s ma ufe laty to l ro c (ok p v tia ol nve ) (option) 50 OPTION 36 Accumulator (option) LCo 8 9 37 Stop valve (option) 39 2-way pedal (option) 40 3-way joint (option) 30 30 22 41 Solenoid valve (option) 44 Solenoid valve (option) E PS 48 Solenoid valve (option) 50 Solenoid valve (option) 51 Solenoid valve (option) A EHF GJ DB T Pi1 Pi1 Pi1 5 56 8 P 2-r Eop Po Pr Rtio vn aa lvl eva (l ov pe t i( oo np )tion) V2 68 Pattern change valve (option) SO/Hitachi 69 Gear pump (option) a e h f g j d b ( ,Ab) ( ,A2) ( ,Bb) ( ,PbL) 21 2 2 2 30Q6-47100-00 2OF2 ( ,P05) 2 ( ,C) 32 36 40 37 3735 A5 18 A2 A1 41 A2 P2PS G.P24 A3( ,PDbc) 2 P T B 27 C T P1 1 [ SP AE FD TA YL ] [ BP OO OW SE TR ] C[F OL NO FW LUX] ( ,A1) E 21 Dr A3 B1 B3 a3 28 2 BC1 SC PDbc 28 69 A1 ( ,A3) SC 41 CA DR9 BC2 LS M ( ,P2) 41 T 56 32 B B1 Cco P Co CoR B A ( ,A2)P D05 o 41 14 13 PCo DoR PDo 16 OPTION LCo A EHF GJ DB SO/Hitachi a e h f g j d b ( ,A2) 21 3-2

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GROUP 2 MAIN CIRCUIT The main hydraulic circuit consists of suction circuit, delivery circuit, return circuit and drain circuit. The hydraulic system consists of one main pump, one control valve, one swing motor, four cylinders and two travel motors. The swash plate type variable displacement axial piston pump is used as the main pump and is driven by the engine at ratio 1.0 of engine speed. 1. SUCTION AND DELIVERY CIRCUIT To cylinders To motors Main control valve To oil cooler To hydraulic oil tank Suction strainer Main pump Hydraulic oil tank 140L3CI01 The pumps receive oil from the hydraulic tank through a suction strainer.

The discharged oil from the pump flows into the control valve and goes out the tank ports. The oil discharged from the main pump flows to the actuators through the main control valve. The main control valve controls the hydraulic functions. The return oil from the actuators flows to the hydraulic tank through the main control valve and the oil cooler. 3-3

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