Tracker 4WD L4-1.6L VIN 6 (1998)
Power Steering Pump: Testing and Inspection
Diagnosis By Symptom
FOAMING, MILKY POWER STEERING FLUID, LOW FLUID LEVEL, AND POSSIBLE LOW PRESSURE
NOTE: These conditions can be caused by air in the fluid, and loss of fluid due to internal pump leakage causing overflow. Check for leaks and correct
fluid level. Bleed the system. Extremely cold temperatures will cause air bubbles in the system if the fluid level is low. If the fluid level is correct and
fluid still foams, remove pump from vehicle and check pump housing for cracks. If housing is cracked, replace the pump.
LOW PRESSURE DUE TO STEERING PUMP
Inspect:
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Flow control valve for proper operation.
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Pressure plate for proper mating with cam ring.
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Cam ring for wear or damage.
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Pressure plate, thrust plate, and rotor for wear or damage.
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Rotor slots for proper vane operation.
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Pump for high internal leakage.
LOW PRESSURE DUE TO STEERING GEAR
Inspect:
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Housing bore for scoring or other damage.
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Valve rings and seals for leaking.
GROWLING NOISE IN STEERING PUMP
Inspect:
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Steering gear for restriction which causes excessive backpressure.
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Pressure plates, thrust plate, or rotor for wear or damage.
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Cam ring for wear or damage.
GROANING NOISE IN STEERING PUMP
Inspect:
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Power steering hydraulic system for air in pipes/hoses or reservoir.
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Fluid level.
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Power steering pump mounting for proper and secure installation.
RATTLING NOISE IN STEERING PUMP
Inspect:
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Rotor slots for proper vane operation.
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Vane for proper installation.
SWISHING NOISE IN STEERING PUMP
Inspect:
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Flow control valve for damage.
WHINING NOISE IN STEERING PUMP
Inspect:
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Power steering pump shaft bearing for damage.
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Pressure plates and vanes for damage.
