CMJ Sectional Valve Mobile Directional Control …

1 Mobile Directional Control ValveCMJ Sectional Valve Rate pressure : 230barFlow rate 60, 80L/min34557910101214 Table of ContentsGeneral IntroductionOperation Data CMJ60 Schematic and InstallationSpecifications and Spool TypesCharacteristics CurvesCMJ80 Schematic and InstallationSpecifications and Spool TypesCharacteristics CurvesEATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 20132 Typical Applications Excavator and mini excavator Backhoe loader Horizontal Directional drilling Forklift Agricultural machinery Open center Sectional Control Valve Max. pressure : 230 bar Two flow options available: 60 LPM; 80 LPM Using low friction seals and wipers Low pressure drop and low noise through optimized casing and oil path design Flexible configuration for multiple functions Low hysteresis and high dynamic Valve design Low internal leakage due to optimum spool design High market acceptance due to reliability and durability Three Main Relief valves provide added system protection in complex excavator applications.

2 (Market leading design) P1 and P2 can purge additional flow from P3 through special patented circuit design to achieve higher work circuit speeds Load Holding Valve for Boom Holding Multiple Valve port relief configurations available For traction drive Control , P1 and P2 separately supply left and right traction, while P3 supplies other functions, bucket load will not impact the traction speed during travel straight mode General IntroductionFeatures & BenefitsThe open center system is widely applied in compact machinery, typically mini excavator. Compared with other systems, open center systems are market-proven products with competitive cost and high levels of reliability. This catalogue introduces two types of open center Sectional valves applicable to 5~7 Ton mini excavator applications.

3 NotesOther larger mono-block valves are available on request, please consult AP product marketing for further Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 20133 Operation DataModelCMJ60 CMJ80 Spool specificationSpool Dia = mmSpool Dia = mmSpool Stroke = mmSpool Stroke = mmRated pressure220 bar230 barMax. pressure240 bar250 barPilot port rated pressure40 bar40 barMax. flowP1,P2 60 LPMP1,P2 80 LPMP3 40 LPMP3 40 LPMMax. back pressurePeak 20 barPeak 20 barNormal 8 barNormal 8 barTemperature range-20 ~ 90 C-20 ~ 90 CHydraulic oilISO VG 46 EquivalentISO VG 46 EquivalentMain relief setting220 bar @ 40 LPM230 bar @ 50 LPMO verload relief setting240 bar @ 10 LPM250 bar @ 20 LPMI nternal leakage8 cc/min @70 bar & 37 Cst8 cc/min @70 bar & 37 CstTypical vehicle application5 Ton5-7 TonEATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 2013460L/minCMJ60 Schematic of typical mini excavator applicationa3a4a5a6a7ppa8a9a10a11T1 SwingDozerA3B3b3A4B4b4P3 Boom 2 BreakerArmA5B5b5A6B6A7B7P2b6b7Mr2Mr1 Travelb8B8A8b9B9A9P1 Boom 1B10A10b10b11B11 BucketT2 Arm22 Drxb94 TravelEATON Mobile Directional Control Valve Catalogue

4 E-VLMD-MC003-E2 January 2013560L/minCMJ60 Installation, mmPilot port 19-pf1/4T1-Port 1/2(t2)To rque4 rque3 1/4xb9Pf 1/4 DrPPa7a6a5 Pumo inlet( ) 3-pf1/2To rque4 rque4 port 17-pf 1/2To 10 ThruTo rque3 platePart Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 20136papbPBATPBYTMMpaPBATPBYTpbMMPBATPTM M bapaPBTPBYTpbMMpaPBATPTpbMMSpecification s and Spool TypesSection schematic function - Hydraulic pilot controlSection schematic function - Manual controlInlet section schematic (Mini excavator applications)CMJ601. Hydraulically Operated, 3-Position Spool and regeneration from A to B line, while the spool is moved to the right Manually Operated, 3-Position Spool which is opened to T from A and B port in neutral Travel Straight function is integrated in inlet block.

5 In order to make this function work normally, a pilot pressure from pilot gear pump is needed to supply to PP port. 4. Hydraulically Operated, 3-Position Spool which has P->B line, while the spool is moved to the right Hydraulically Operated, 3-Position Spool which has orifice in B->T line Hydraulically Operated, 3-Position Spool which is opened to T from A and B port in neutral Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 20137 Exploded ViewPressure drop curveCMJ60P P10981234567403530252015105006560555045 Pof P-T Neutral FlowFlow Rate(LPM)P P161412246810403530252015105006560555045 Pof P-CFlow Rate(LPM)P Pof C-T Flow Rate(LPM) (bar)(bar)(bar)lpmlpmlpmEATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 20138 CMJ60 Auxiliary valves CharacteristicStatic CharacteristicDynamic CharacteristicMain relief valveOverload relief valveHolding valve0 5 10 15 20 25 30 35 40 45 50280240200160120 80 40 0 pressure (bar)Flow rate(lpm)0 1 2 3 4 5 6 7 8 9 10280240200160120 80 40 0807060504030 20100 Time(sec) pressure (bar)Flow rate(lpm)PressureFlow rate280240200160120 80 40 0 Flow rate(lpm)

6 0 2 4 6 8 10 12 14 16 18 20 pressure (bar)0 1 2 3 4 5 6 7 8 9 10807060504030 20100 pressure (bar)Time(sec)Flow rate(lpm)PressureFlow rate280240200160120 80 40 00 5 10 15 20 25 30 35 40280240200160120 80 40 0 Pilot pressure (bar)Work pressure (bar)PressurePilot signalTime(sec)Pilot signal pressure (bar)Work pressure (bar)280240200160120 80 40 00 1 2 3 4 5 6 7 8 9 10403530252015 1050 Note:Above configurations are for mini excavator applications.

7 All other configuration, please consult AP product Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 20139 CMJ8080L/minSchematic of typical mini excavator application(2- )( )P3T2a9A9B9 Swingb9b8Dr 1(Down)(Up)a8(Rod)A8(Head)B8D/bladePAPPP TA7a7B6A6a6(Head)(Rod)(Head)(Dump)(Break er)(Breaker)B5A5a5P2P1a4A4B4a3A3Dr 2Pi 2B3a2A2B2a1A1B1(Up)(Head)(Dump)(Rod)(Rod )(Head)(Dump)(Rod)(Head)T1T3 Arm 2 BucketBoom 1 Travel / RTravel / LArm 1Tr-st(23 2 Bar)(23 2 Bar)(Crowd)(Crowd)b1b2(Down)b3b4b5b6(Boo m 2)(2- )b7(Crowd)Sol V/V for breaker(Crocking Bar)(End 26 Bar)( )B7 EATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 11 THRUC/Bore 90 mm(maintenance clearance of relief v/v)706015276761661377060706054047838373 8383838383838383838T3T1A1B1A2B2B3SA3B4P1 A4P2B5A5B6A6 PPB8A8B9A9B7A7P3T2 Approximately 230 mm(Maintenance clearance od main spool)Approximotely 90 mm(Maintenance clearance of relief V/V)CMJ8080L/minInstallation, mmEATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 201311 CMJ80 Specifications and Spool TypesSection schematic function - Hydraulic pilot controlTravelling straight section (Mini excavator)A separated Travelling Straight section is used to combine flow of P3 to P1 and P2 circuits when Travelling Straight function is activated.

8 To increase travel speed. 1. Hydraulically Operated, 3-Position Hydraulically Operated, 3-Position Spool which does not have Return (A->T or B->T) Hydraulically Operated, 3-Position Spool which is opened to T from A and B port in neutral 1 EATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 201312 CMJ80 Exploded ViewPressure drop curveP P12102468403530252015105006560555045 P708075of P-T Neutral FlowFlow Rate(LPM)P P161412246810403530252015105006560555045 of P-CFlow Rate(LPM) P18P P7651234403530252015105006560555045of C-T Flow Rate(LPM) P70 75 80(bar)(bar)(bar)lpmlpmlpmEATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 201313 CMJ80 Auxiliary valves CharacteristicStatic CharacteristicDynamic CharacteristicMain relief valveOverload relief valveHolding valve280240200160120 80 40 00 5 10 15 20 25 30 35 40 45 50 PressureFlow rate(lpm) pressure (bar)0 1 2 3 4 5 6 7 8 9 10807060504030 20100280240200160120 80 40 0 Time(sec) pressure (bar)Flow rate(lpm)

9 PressureFlow rate0 2 4 6 8 10 12 14 16 18 20280240200160120 80 40 0 PressureFlow rate(lpm) pressure (bar)PressureFlow rate807060504030 20100280240200160120 80 40 00 1 2 3 4 5 6 7 8 9 10 Time(sec)Flow rate(lpm) pressure (bar)Pressure0 5 10 15 20 25 30 35 40280240200160120 80 40 0 Pilot pressure (bar)Work pressure (bar)PressurePilot signal280240200160120 80 40 0403530252015 10500 1 2 3 4 5 6 7 8 9 10 Pilot pressure (bar)Work pressure (bar)Pilotsignal pressure (bar)Note:Above configurations are for mini excavator applications.

10 All other configuration, please consult AP product Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 201314 NotesEATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 201315 2013 Eaton CorporationAll Rights Reserved Document No. E-VLMD-MC003-E2 January 2013 Eaton Hydraulics Group USA14615 Lone Oak RoadEden Prairie, MN 55344 USATel: 952-937-9800 Fax: Group EuropeRoute de la Longeraie 71110 MorgesSwitzerlandTel: +41 (0) 21 811 4600 Fax: +41 (0) 21 811 4601 Eaton Hydraulics Group Asia PacificEaton Building4th Floor, Lane280 Linhong Rd. Changning DistrictShanghai 200335 ChinaTel: (+86 21) 5200 0099 Fax: (+86 21) 2230 7240