Steering Gears Application Guide - CARQUEST Auto Parts

Sheppard Troubleshooting Guide 16−POWER STEERING GEARSSYMPTOM POSSIBLE CAUSE REMEDYOil leaking at output shaft of steeringgearDamaged sector shaft sealClogged oil filter in reservoir (high backpressure)Pinched or restricted oil return lineDamaged quad ring sealDamaged bronze bearingsDamaged lipseal (Series 5 gears)Damaged roller bearingsReplace sector shaft sealReplace filterIncrease change frequencyLocate and correctCheck back pressureReplace quad ring sealReplace bronze bearingsPolish output shaft or replace to remove bronzedepositsReplace with replacement seal assy.Replace roller bearingsPolish output shaft or replace to remove pitting& grooving in seal areaOil leaking at actuating shaft of steeringgearWorn or damaged oil sealDamaged actuating shaft seal surfaceReplace sealsReplace damaged portsLube bearing cap more oftenOil leaking at supply pump driveshaftDamaged oil sealOil seal−heat damagedLoose or damaged bushing onpump drive shaftReplace oil sealCheck operating temperatureRepair pump per pump service instructionsOil leaking between reservoir andpump bodySeal or gasket damagedReplace damaged partsLubricant milky or white in appearance Water entry through reservoir venting system Clean vent system or replace cap assemblyOil forced out of reservoir or foamingClogged oil filterLoose pump drive beltsAir in systemFaulty supply pump (Cavitation)Relief plungers of steering gear notadjusted properlyOperating temperatures too highChange oil and oil filterIncrease change intervalsAdjust belts or replaceBleed air from systemCheck for air leak on suction side of supply pumpCheck supply pump following "HydraulicSupply−Diagnosis" proceduresRepair pump per pump service instructionsAdjust relief plungers (see Final Adjustments)Follow "Hydraulic Supply−Diagnosis" proceduresEngine oil in power steering reservoir(Gear driven pump)Faulty seal at pump drive shaftFaulty seal at accessory shaft driving supply pumpRepair pumpRepair accessory driveLubricating oil discolored or smells badOperating temperatures too highChange intervals too longIncorrect lubricant usedCheck and correct cause of over−heatingIncrease oil change frequencyDrain, flush and refill with 10W40 motor oilHigh operating temperaturesOil flow restrictionOil flow too highCheck back pressure (Follow "HydraulicSupply−Diagnosis" procedures)Check maximum oil flow (follow "HydraulicSupply−Diagnosis" procedures)16 − 31