Toro Groundsmaster 5900 Series - Page 118

ReverseDirection
Thetractioncircuitoperatesessentiallythesameinreverselowrangeasitdoes
intheforwarddirection.However,theowthroughthecircuitisreversed.Oil
owfrompistonpumpportBisdirectedtotractionmanifoldportP2.Pumpow
isthenroutedinparalleltobothhalvesofthefrontwheelmotorsthroughport
Rofthemotors.FlowexitsthemotorsectionsthroughmotorportsA1andA2.
FlowfrommotorportA1returnstothepistonpumpthroughthetractionmanifold
P1portandthenisroutedbacktopumpportA.Returnowfromthefrontwheel
motorA2portisroutedtotheoppositerearwheelmotor(rightfronttoleftrear
throughunshiftedPD5andPD2,leftfronttorightrearthroughunshiftedPD4
andPD3).Flowfromtherearmotorsreturnsthroughunshiftedtractionmanifold
valvePD1,manifoldportP1andtopistonpumpportA.Oilowinreversekeeps
allwheelmotorsattheirmaximumdisplacementtoallowalowertractionspeed
alongwithCrossTrax
TM
4WDoperationforenhancedtraction.
Operationofthetractionmanifoldshuttlevalve(SH),steeringorices(OR1and
OR2),reliefvalve(RV1)andcheckvalves(CV1andCV2)isthesameinreverse
lowspeedasitisintheforwarddirection.
HydraulicSystem:HydraulicFlowDiagrams
Page5–18
Groundsmaster
®
5900&5910
16227SLRevB