Case 1150M - Torque - Standard Torque Data for Hydraulic Connections

INTRODUCTION
Torque-Standardtorquedataforhydraulicconnections
1150MNA
Generalinformation
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Hydraulicconnectionsrequireaminimumassemblytorqueinordertoprovidezeroleakageatratedpressurewith
adequatefatigueresistance.Over-torquingofahydraulicconnectioncanalsoleadtoleakageorfailure.Forsome
connections,CASECONSTRUCTIONrequiresadifferenttorquevaluethanislistedintheISOandSAEstandards.
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Thetorquevaluesinthisdocumentshouldbeusedwheneverpossibleorapplicable.
NOTICE:Alwaysfollowtheinstructionsinthismanualforspecictorquevalueswhenyouservicecomponents.
Theinformationinthissectionisforgeneralguidanceonlywhenaprocedurecontainsnospecictorquevalue.
Tolerance
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Thetoleranceforalltorquevaluesis±10%.Thistolerancemustincludeallassemblyvariation,notonlythetorque
wrenchrepeatability.
Lubrication
Applicationofgreaseorotherlubricantstohydraulicconnectorsshouldbeavoided.Ifcleanhydraulicoilisalready
ontheconnection,itisnotrequiredtoremovetheoil.Generally,applicationofgrease:
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Maycauseasignicantchangeinthetorquerequiredtoproperlytightentheconnection.
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Mayreducetheconnection’sresistancetovibration.
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Excessivegreasemaydisplaceanelastomersealduringtightening.
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Greaseextrusionwhenconnectionistightenedmaybemistakenforleakage.
CASECONSTRUCTIONproductsgenerallyuseO-RingBoss(ORB)connectorsthathaveT eon™-coatedO-rings,
eliminatingtheneedforO-ringlubricationduringinstallation.Forconnectionswhicharemadeintoaluminummani-
foldsorwithstainlesssteelconnectors,itmayberequiredtoapplyalubricanttopreventgalling.
UseofLOCTITE®andotherthread-lockingcompoundsisprohibited.Thesecompounds:
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Maycauseasignicantchangeinthetorquerequiredtoproperlytightentheconnections.
•
Reducetheserviceabilityofthejoint.
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MaypreventtheO-ringfromproperlysealingifthecompoundgetsontheO-ring.
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