Toro Groundsmaster 5900 Series - Page 191

GearPumpAssembly(Figure82)
Note:Whenassemblingthepump,checkthemarkerlineoneachparttomake
surethepartsareproperlyalignedduringassembly.
1.Lubricatebodyseals,pressureseals,uni−ringsandthrustplategrooves
withathincoatofpetroleumjelly.Lubricateallotherinternalpartsfreely
withcleanhydraulicoil.
1
234
g287893
Figure85
1.Driveshaft
3.Dustseal
2.Shaftseal
4.Retainingring
2.Notesealorientationandinstallnewsealsintofrontcover(Figure85):
A.Pressrstshaftsealintofrontcoveruntilitreachesthebottomofthebore.
B.Installsecondshaftsealintofrontange.
C.Installretainingringinfrontcover.
3.Placefrontange,sealsidedown,onaatsurface.
4.AssemblypumpsectionP1:
A.Installthepressureseals,atsideoutward,intothegroovesinthe
thrustplates.Followbycarefullyplacingtheuni−rings,atsideoutward,
betweenthepressuresealsandthegroovesinthethrustplate.
B.Applyalightcoatingofpetroleumjellytotheexposedsideofthefront
ange.
C.Lubricatethedriveshaft/gearwithcleanhydraulicoil.Insertthedriveend
ofthedriveshaftthroughthethrustplatewiththepressuresealside
downandtheopensideofthepressuresealpointingtotheinletsideof
thepump.Installshaftintofrontcover.
D.Lubricatetheidlershaft/gearwithcleanhydraulicoil.Aligntheposition
markingsmadeduringdisassemblyandinstallidlergearshaftintothe
frontthrustplateandfrontcover.Applyalightcoatingofcleanhydraulic
oiltogearfaces.
E.Installrearthrustplatewithpressuresealsideupandopensideofthe
pressuresealpointingtotheinletsideofthepump.
F.Installsteelbushings/dowelpinsinbody.
G.Applyalightcoatingofpetroleumjellytonewbodysealandbodyseal
grooveinthebody.Installnewbodysealintothebody.
Groundsmaster
®
5900&5910
Page5–91
HydraulicSystem:ServiceandRepairs
16227SLRevB