Theportsonthetractioncontrolmanifoldaremarkedforeasyidenticationof
components.Example:P1isthepistonpumpconnectionportfortheforward
directionandSVisthelocationforthehigh/lowspeedsolenoidvalve(seeA
HydraulicSchematic(pageA–3)toidentifythefunctionofthehydrauliclinesand
cartridgevalvesateachport).
Althoughnotrecommendedinmostsituations,reliefvalveRV1andcheckvalve
CV5areadjustable(seeAdjustManifoldReliefValves(page5–72)).
IMPORTANT
AnoriceisplacedbeneaththepluginthecontrolmanifoldOR4
port.Iftheplugisremoved,makesuretoremovetheoriceand
labelitspositionforassemblypurposes.
Note:Thetractioncontrolmanifoldincludesseveralzero−leakplugs.These
plugshaveataperedsealingsurfaceontheplugheadthatisdesignedtoresist
vibrationinducedplugloosening.Thezero−leakplugsalsohaveanO−ringasa
secondaryseal.Ifzero−leakplugremovalisnecessary,lightlyraptheplughead
usingapunchandhammerbeforeusinganallenwrenchtoremovetheplug:the
impactwillallowplugremovalwithlesschanceofdamagetothesocketheadof
theplug.Tightenplugstotorquevalueprovided(Figure100).
CartridgeValveService
Forcartridgevalveserviceprocedures,seeCartridgeValveService(page
5–158).
Groundsmaster
®
5900&5910
Page5–113
HydraulicSystem:ServiceandRepairs
16227SLRevB