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Hydraulic Pressure Testing

  1. On all models, disconnect pressure lines from steering gear case and vane pump. Attach pressure gauge with gauge side connected to vane pump.
  2. Attach valve side of gauge to pressure line. Bleed air from system. Check fluid level. With engine at idle and with valve closed, check fluid pressure.
    HYDRAULIC PRESSURE

    Application psi (kg/cm2 )
    Camry 1066 (75)
    Celica 1024 (72)
    Corolla 1066 (75)
    Cressida 924 (65)
    Supra 924 (65)
    Tercel 782 (55)
    Van 1066 (75)
    NOTE: Do not keep pressure gauge valve closed for more than 10 seconds. Fluid testing temperature should be 176°F (80°C).
  3. Open valve fully. Note pressure with engine at idle, and again at 3000 RPM. Pressure difference should be less than 71 psi (5 kg/cm2 ). If more, check flow control valve.
  4. With steering wheel at lock position and pressure valve open, recheck pressure. Pressure should be 782 psi (55 kg/cm2 ) for Tercel, 1024 psi (72 kg/cm2 ) for Celica, 142-248 psi (10-20 kg/cm2 ) for Cressida, and 1066 psi (75 kg/cm2 ) for all other models.
  5. With vehicle on flat surface, turn steering wheel to center position. With engine idling and using a spring gauge, measure steering turning force at steering wheel outer rim, in both directions.
  6. Turning force should not exceed 12.1 lbs. (5.5 kg) on Corolla and Tercel, or 8.8 lbs. (4.0 kg) on all other models.
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