Toro Groundsmaster 4500-D Series - Priming Hydraulic Pumps

PrimingHydraulicPumps
Wheneverthehydraulicsystemisushed,thehydraulicsystemischargedor
hydrauliccomponentsareinstalled,itisimportanttoproperlyprimethehydraulic
pumps.Hydraulicpumpprimingensuresthatthegearpumpandpiston(traction)
pumphaveadequateoilduringinitialstart−upandrunning.Thepumpscanbe
primedbyusingaremotestarterswitch(seeSpecialT ools(page2–16))tocrank
enginewhichallowsthepumpstoprime.
Usethefollowingproceduretoprimethehydraulicpumps:
1.MakesurethatignitionswitchisintheOFFpositionandkeyisremoved
fromswitch.
1
2
3
g275416
Figure94
1.Startermotor
3.B+terminal
2.Startersolenoid
2.Checkhydraulicreservoiroillevelandadjustifnecessary.
Note:AbluewireconnectstothestartermotorsolenoidB+terminal(Figure
94).Itisnotnecessarytoremovethisbluewirefromthesolenoidterminal
forhydraulicpumppriming.
3.Connectremotestarterswitchelectricalleadstothestartermotorsolenoid
B+terminalandthepositivepostofthebattery.
4.Engageremotestarterswitchandcrankstarterforthirty(30)secondsto
primehydraulicpumps.Waitthirty(30)secondstoallowthestartermotor
andstartersolenoidtocool.Repeatcrankingprocedureasecondtime.
5.Disconnectremotestarterswitchleadsfromstartermotorsolenoidterminal
andpositivepostofthebattery.
HydraulicSystem:ServiceandRepairs
Page5–90
Groundsmaster
®
4500-D/4700-D
19245SLRevA