Toro Groundsmaster 4500-D Series - Page 200

Removal(Figure96)(continued)
5.ReadtheGeneralPrecautionsforRemovingandInstallingHydraulicSystem
Components(page5–87).
6.Forassemblypurposes,labelallhydrauliclinesconnectedtogearpump
ttings.
7.Disconnecthydrauliclinesfromgearpumpandputcapsorplugsonopen
hydrauliclinesandttings.
8.Supportgearpumpassemblytopreventitfromfalling.
9.Removetwo(2)capscrewsandwashersthatsecuregearpumptopiston
pump.Slidegearpumpawayfrompistonpumpuntilgearpumpshaftis
removedfrompistonpumpcoupler.Lowergearpumpandremovefrom
machine.
Note:Acasedrainexistsinthepiston(traction)pumpandasuctionportis
neartheinputshaftofthegearpump(Figure97).Whenthegearpumpis
removedfromthepistonpump,plugpistonpumpcasedrainholetoprevent
drainingthepistonpump.
10.RemoveO-ring(item15)fromgearpumpange.DiscardO-ring.
11.Ifhydraulicttingsaretoberemovedfromgearpump,markttingorientation
toallowcorrectassembly.RemovettingsfrompumpanddiscardO-rings.
Installation(Figure96)
1.Ifttingswereremovedfromgearpump,lubricateandplacenewO-rings
ontottings.Installttingsintopumpportsusingmarksmadeduringthe
removalprocesstoproperlyorientatettings.Tightenttings(seeInstalling
theHydraulicFittings(SAEStraightThreadO-RingFittings)(page5–9)).
2.MakesuremountingandO-ringsealingsurfacesonthegearpumpand
pistonpumpareclean.
3.LubricatenewO-ring(item15)withcleanhydraulicoil.PositionO-ringon
gearpumpange.
g308680
Figure97
1.Pistonpumpcasedrain
2.Gearpumpsuctionport
4.Aligngearteethongearpumpinputshaftwithpistonpumpshaft.Slidegear
pumpinputshaftintopistonpumpshaft.Securegearpumptopistonpump
withtwo(2)capscrewsandatwashers.
HydraulicSystem:ServiceandRepairs
Page5–98
Groundsmaster
®
4500-D/4700-D
19245SLRevA