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Home >> BMW >> 1982 >> 633CSi Automatic Trans >> Repair and Diagnosis >> Steering >> Power Steering >> Power Steering - Power-Assisted Recirculating Ball >> Testing >> Steering Pump Pressure

Steering Pump Pressure

  1. On 733i, discharge accumulator by operating brake pedal 20 times. On all models, disconnect pressure line from pump. Connect pump pressure line to gauge.
  2. Disconnect pressure line from control regulator and connect it to pressure gauge. Shut cut-off valve on gauge. Open shut-off valve on pressure line See  Figure . 
  3. Bleed system with engine running at idle. After bleeding, close valve in pressure line for 10 seconds maximum and read pressure. On 528e and 633CSi, pressure should be 1260-1540 psi. (88.7-108.3 kg/cm2 ).
    Fig 1: Cross-Sectional View Of Power Steering Gear Assembly
    G09362063Courtesy of BMW OF NORTH AMERICA, INC.
    Fig 2: Cross-Sectional View Of Power Steering Pump.
    G09362064Courtesy of BMW OF NORTH AMERICA, INC.
  4. On 733i, pressure should be 1404-1716 psi. (98.5-120.5 kg/cm2 ). If pressure is not within limits, check belt tightness. Repair or replace pump if belt adjustment does not remedy problem.
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