Service Manual
ServicingtheLiftControlManifold
g031933
Figure163
1.Liftmanifold6.Solenoidcoil(4each)11.Solenoidvalve(S6)
2.Solenoidvalve(S2,S3,S7andS8)
7.Solenoidnut12.SAE#6plugwithO-ring
3.Solenoidcoil(5each)8.Solenoidvalve(S1)13.NWD#6plugwithO-ring
4.Solenoidnut9.Reliefvalve(RV)14.Flowdivider(FD)
5.Solenoidvalve(S4andS9)10.Solenoidvalve(S5)15.SAE#4plugwithO-ring(7each)
Note:Theportsontheliftcontrolmanifoldaremarkedforeasyidenticationand
assemblyofthecomponents.Example:P1isthesupplyportfromthegearpump
andFDistheowdividercartridgelocation;refertotheHydraulicSchematicin
Chapter10—FoldoutDrawingstoidentifythefunctionofthehydrauliclinesand
cartridgevalvesateachport.
Note:Theliftcontrolmanifoldincludesseveralzero-leakNWDplugs.These
plugshaveataperedsealingsurfaceontheplugheadthatisdesignedtoresist
vibrationinducedplugloosening.Thezero-leakplugsalsohaveanO-ringas
asecondaryseal.Ifzero-leakplugremovalisnecessary,useapunchand
hammertolightlyraptheplugheadbeforeusinganallenwrenchtoremovethe
plug:theimpactwillallowtheplugremovalwithlesschanceofdamagetothe
socketheadoftheplug.Wheninstallingtheplugs;refertoFigure163forthe
pluginstallationtorque.
Groundsmaster5900TractionUnit
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HydraulicSystem:ServiceandRepairs
08159SLRevC