Case IH MAXXUM 140 - Page 65

HYDRAULIC-PNEUMATIC-ELECTRICAL-ELECTRONICSYSTEMS-PRIMARYHYDRAULICPOWER
SYSTEM
BSE2868B42
LoadSensingShuttleValve.
Locatedineachremotevalveslice,theElectronicDraftControlvalveandbetweenthetrailerbrakevalve,frontsus-
pensionvalveandmid-mountedvalves,wheretted,istheloadsensingshuttlevalve(2).Thisallowsthefunction
withthehighestpressuredemandtosendsensingpressuretotheloadsensingvalve,Figure44,onthevariable
displacementpump.
BSB0388A_43643
1.ValveBody
2.FlowCompensatingValve
3.PressureCompensatorValve
4.LoadSensingLine
BSE3660A44
WithReferencetoPRIMARYHYDRAULICPOWERSYSTEM-Overview(A.10.A).
Operationoftheclosedcentrehighpressurehydrauliccircuitisasfollows:-
Thecomponentsinthehighpressurehydrauliccircuitareconnectedbytheirloadsensinglinestothehydraulicload
sensingvalvewhichcontrolstheoutputofthehydraulicpump.
Whenthetrailerbrakes,remotecontrolvalves,hydraulicliftorfrontaxlesuspension(wheretted)areoperating,the
loadsensingvalveonvariableowpistonpump,comparesthepressureinthecomponentloadsenselinewiththe
outputpressureofthehydraulicpump.
84276322A31/05/2010
A.10.A/
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