Toro Groundsmaster 7210 - Page 182

DisassemblingthePolarTracHydraulicControlValve(continued)
IMPORTANT
Match-markspoolstotheirassociatedboresbeforedisassembly.
Thespoolsmustbeinstalledagaintotheborefromwhichthey
wereremoved.
2.Removethe2spoolcaps(item10inFigure126)andslidethespool
assembliesfromtheirbores.
3.RemovetheO-ring(item12inFigure126)andbushingfromeachspool
assembly.
4.Removethewiperseals(item20inFigure126)andO-ringsfromthespool
boreendsthatareoppositetothespoolcaps.
Note:Disassemblethespoolassembliesonlyiftheretainingring(item13in
Figure126),spacer,spoolspring,orwasherneedsreplacement.
5.Removetheseatretainingplugs(items7and15inFigure126),back-up
washers,O-rings,andcheckspringfromthevalvebody.
6.Removethecheckpoppet(item1inFigure126),seats,O-rings,and
plungersfromthevalvebody.
7.Removethesolidplug(item6inFigure126),back-upwasher,andO-ring
fromtheoppositeendoftheplunger.
8.Removethedetentplug(item19inFigure126)andO-ringfromthevalve
body,andremovethedisc,spring,anddetentplungerfromthebody.
InspectingthePolarTracHydraulicControlValve
1.Inspectthespoolsandspoolboresforwear.Ifwearisexcessive,replacethe
controlvalvewithnewone.
2.Inspectthespringsandreplaceasnecessary.
3.Inspecttheplungeranddetentplungerforwear.Replaceasnecessary.
4.InspectthecapsandplugsfordamagedthreadsandinspecttheO-ring
sealingsurfaces.Replaceasnecessary.
AssemblingthePolarTracHydraulicControlValve
IMPORTANT
Donotwipethecontrolvalvepartsdrywithpapertowelsoracloth.
Theyletlintaccumulateinthehydraulicsystem,whichwilldamage
it.
CAUTION
Useeyeprotectionsuchasgoggleswhenusingcompressedair.
1.Cleanallthemetalpartswithsolventandblowdrywithcompressedair.
2.Replacethecheckpoppet(item1inFigure126),O-rings,andback-up
washerswithnewones.
3.InstallnewO-rings(item12inFigure126)intothevalvebody.
HydraulicSystem:ServiceandRepairs
Page4–122
Groundsmaster7210
16222SLRevC