Groundsmaster 4100--D/4110--D Hydraulic SystemPage 4 -- 37
Which Hydraulic Tests Are Necessary?
Before beginning any hydraulic test, identify if the prob-
lemisrelatedtothetractioncircuit,cutting(mow)circuit,
lift circuit, steering circuit or engine cooling fan circuit.
Once the faulty system has been identified, perform
tests that relate to that circuit.
1. If a tractioncircuitproblemexists, consider perform-
ing one or more of the following tests: Traction Circuit
Charge Pressure, Traction Circuit Relief Pressure,
Counterbalance Pressure, R ear Tr action Circuit (RV)
Relief Pressure, Traction Circuit Reducing Valve (PR)
Pressure and/or Piston (Traction) Pump Flow Tests.
IMPORTANT: Refer to Traction Circuit Component
Failure in the General Information section of this
chapterforinformationregardingtheimportanceof
removing contamination from the traction circuit.
2. If a cutting (mow) circuit problem exists, consider
performing one or more of the following tests: Cutting
Deck Circuit Pressure, PTO Relief Pressure, Cutting
Deck Motor Case Drain Leakage and/or Cutting Deck
Gear Pump Flow Tests.
3. Ifasteeringcircuitproblemexists,considerperform-
ing one or more of the following tests: Steering Circuit
Relief Pressure, Steering Cylinder Internal Leakage
and/or Steering and Lift/Lower Gear Pump Flow Tests.
4. If a lift circuit problem exists, consider performing
oneormore of the followingtests:Lift/Lower CircuitRe-
liefPressureand/orSteeringandLift/LowerGearPump
Flow Tests.
5. Ifaenginecoolingfancircuitproblemexists,consid-
erperformingone or more ofthefollowing tests:Engine
Cooling Fan Circuit and/or Engine Cooling Fan Circuit
Gear Pump Flow Tests.
Hydraulic
System
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