ReverseDirection
Thetractioncircuitoperatesessentiallythesameinreverseasitdoesinthe
forwarddirection.However,theowthroughthecircuitisreversed.Pushing
thebottomofthetractionpedalrotatesthevariabledisplacementpumpswash
plateinthehydraulicpumptocreateaowofuid.Thisuidisdirectedtothe
îš¿xeddisplacementmotorwhichturnsthedifferentialinputshafttodrivethefront
wheelsinareversedirection.Thereversetractionpressureislimitedto32,495
kPa(4,713psi)bythereversetractionreliefvalvelocatedinthehydraulicpump.
Theuidowingfromthemotorreturnstothevariabledisplacementpumpand
iscontinuouslypumpedthroughtheclosedlooptractioncircuitaslongasthe
tractionpedalispushed.
Thechargecircuitfunctionsthesameinreverseasitdoesintheforward
direction.
HydraulicSystem:HydraulicFlowDiagrams
Page5–26
Groundsmaster
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3280-D/3320
05138SLRevB
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