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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 208 (POWER STEERING SYSTEM)POWER STEERING FLUID INSPECTIONFLUID PRESSURE INSPECTION
1999 Mazda 626 ES, 2.5 D, Standard

Fluid Pressure Inspection

1999 Mazda 626 ES, 2.5 D, StandardSECTION Fluid Pressure Inspection
WARNING: This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Assemble the SSTs  as shown in the figure.
    Fig 1: Assembling Special Tools
    G00998311Courtesy of MAZDA MOTORS CORP.
  2. Disconnect the pressure pipe from the steering gear, and connect the SSTs  .
    Fig 2: Connecting Special Tool To Steering Gear
    G00998312Courtesy of MAZDA MOTORS CORP.

    Tightening Torque 

    29.4-44.1 N.m 

    {3.00-4.49 kgf.cm, 21.7-32.5 ft.lbf} 

  3. Bleed the air from the system.
  4. Open the gauge valve fully.
  5. Start the engine and turn the steering wheel fully left and right to raise the fluid temperature to 50-60 °C {122-140 °F}. 
  6. Close the gauge valve completely.
    Fig 3: Pressure Test With Gauge Valve Closed Completely
    G00998313Courtesy of MAZDA MOTORS CORP.
  7. Increase the engine speed to 1,000-1,500 RPM  and measure the fluid pressure generated by the oil pump.
    • If the pressure is not within the specification, repair or replace the oil pump component.
    CAUTION:
    • If the valve is left closed for more than 5 seconds, the fluid temperature will rise excessively and adversely affect the oil pump.

    Oil Pump Fluid Pressure 

    8.23-8.92 MPa 

    {84.0-90.9 kgf/cm2 , 1,200-1,290 psi}

  8. Open the gauge valve fully and increase the engine speed to 1,000-1,500 RPM. 
    Fig 4: Pressure Test With Gauge Valve Open Completely
    G00998314Courtesy of MAZDA MOTORS CORP.
    9. CAUTION:
    • If the steering wheel is kept in the fully turned position for more than 5 seconds, the fluid temperature will rise excessively and adversely affect the oil pump.
  9. Turn the steering wheel fully to the left and right, then measure the fluid pressure generated at the gear housing.
    • If the pressure is not within the specification, repair or replace the steering gear component.
  10. Gear housing fluid pressure.

    8.23-8.92 MPa 

    {84.0-90.9 kgf/cm 2  , 1,200-1,290 psi} 

  11. Remove the SSTs  . Install and tighten the pressure pipe to the specified torque.

    Tightening Torque 

    29.4-44.1 N.m 

    {3.00-4.49 kgf.cm, 21.7-32.5 ft.lbf} 

  12. Bleed the air from the system.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.