Service Manual

SteeringCircuitProblems
Problem
PossibleCause
SteeringinoperativeorsluggishSteeringcomponents(e.g.tierods,steering
cylinderends)arewornorbinding.
Steeringcylinderisbinding.
Oillevelinhydraulicreservoirislow(Note:
Otherhydraulicsystemsareaffectedaswell).
Steeringreliefvalve(RV1)incombination
manifoldisstuckordamaged.
Thepressurecompensatorvalve(EC)in
combinationmanifoldisstuckordamaged.
Steeringcylinderleaksinternally.
Steeringcontrolvalveiswornordamaged.
Gearpumpsectioniswornordamaged(Note:
Awornordamagedgearpumpsectionwill
alsoaffectthelift/lower,enginecoolingfan
motorandtractionchargecircuits).
Groundsmaster
®
4000-D&4010-D
Page3–7Troubleshooting:
13202SLRevF