Toro 08743 - Testing the Optional Attachment Circuit - Attachment Pump (P3) Flow and Circuit Relief

TestingtheOptionalAttachmentCircuit–AttachmentPump(P3)
FlowandCircuitRelief
g355415
Figure44
OptionalAttachmentCircuit–AttachmentPump(P3)FlowandCircuitRelief
Aremoterearhydraulicskit(model08781)isavailableforbothSandPro3040
and5040machinestosupportthehydraulicneedsofvariousrearattachments.
Ahydraulicsswitchkit(model08783)isavailableforSandPro5040machines
tosupportthehydraulicneedsofvariousfrontandrearattachments.Eachkit
includesitsownxeddisplacementgeartypehydraulicpump(P3)drivendirectly
bytheengine.TheAttachmentPump(P3)FlowTestcomparesuidowatNo
LoadwithuidowUnderLoad.Adropinowunderloadofmorethan15%
indicatesthegearsandwearplatesinthepumphaveworn.Continuedoperation
withawornpumpcangenerateexcessiveheatandcausedamagetotheseals
andothercomponentsinthehydraulicsystem.
Thereliefvalvefortheremoterearhydraulicskit(model08781)ispartofthe
solenoidvalveonthekithydraulicmanifold.Thereliefvalveforthehydraulics
switchkit(model08783)isaseparatecartridgestylevalveonthekitmanifold.
SpecialEquipmentRequired:
•Flowmeterwithpressuregaugethathasatleasta32liter/minute(10
gallons/minute)capacity.
•2hydraulictesthoseswithquick-disconnectttings
•Non-contacttachometer(phototach)
TestProcedure
1.Parkthemachineonalevelsurface,loweranyattachments,engagethe
parkingbrake,andsetthekeyswitchtotheOFFposition.
HydraulicSystem:TestingtheHydraulicSystem
Page5–48
SandPro
®
3040and5040
20251SLRevA