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Home >> BMW >> 2001 >> M3 2D Convertible >> Repair and Diagnosis >> Steering >> Power Steering >> Power Steering System - Repair >> Diagnosis & Testing >> Checking Function Of Power Steering Vane Pump >> Checking Pump Pressure

Checking Pump Pressure

  1. Close valve (A) and open valve (B). See Fig 1.
  2. Start engine. Ensure correct hydraulic fluid level in tank.
  3. Heat hydraulic fluid to approximately 122° F (50° C) by moving steering wheel at increased engine speed.
  4. Close valve (B) for a maximum 10 seconds and read off pressure. If pressure exceeds 1595 psi (110-120 bar) by more than 10 percent replace vane pump. If pressure is 10 percent less than 1595 psi 1595 psi (110-120 bar), check ribbed V-belt tension. If tension is OK, replace vane pump.
  5. Connect pressure line after removing special tool. Tighten to specification. See TORQUE SPECIFICATIONS .
  6. Bleed hydraulic system. See BLEEDING POWER STEERING SYSTEM  under LUBRICATION.
Fig 1: Checking Vane Pump
G00177883Courtesy of BMW OF NORTH AMERICA, INC.
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