BMW 318/325/M3/525/535/M5 1989-1993 Repair Information

Power Steering Pump

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See Figure 1



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Fig. Fig. 1: Exploded view of standard power steering pump

REMOVAL & INSTALLATION



  1. Disconnect the negative battery cable. Release the pressure from the reservoir.
  2.  
  3. Draw the hydraulic fluid from the pump reservoir. Disconnect and plug the hydraulic lines.
  4.  
  5. Disconnect and plug the hydraulic lines. Remove the bolts and loosen the nuts to turn the adjusting pinion.
  6.  
  7. Remove the drive belt.
  8.  
  9. Remove the bolts from the brackets holding the pump and remove the pump assembly.
  10.  
  11. Reverse the removal procedure for installation. Tighten the adjusting pinion to 6 ft. lbs. (8 Nm).
  12.  
  13. If equipped with a tandem pump the removal and installation procedure is the same.
  14.  

SYSTEM BLEEDING



Without Ride Height Control
  1. Fill the reservoir to the MAX mark on the oil stick.
  2.  
  3. Rotate the steering in both directions fully, to each stop, until all the air is removed from the fluid.
  4.  
  5. Check the oil level and fill to the specified mark, if necessary.
  6.  

With Ride Height Control
  1. Fill the reservoir to the level of the strainer.
  2.  
  3. Rotate the steering in both directions fully at least 2 times.
  4.  
  5. Raise the vehicle so the rear wheels are off the ground.
  6.  
  7. Check the oil level. The level should be about 1 / 4 in. (5 mm) above the strainer after 2 minutes. Fill to the specified mark, if necessary.
  8.  

With ASC+T Traction Control
  1. Check the brake fluid reservoir and top off if necessary.
  2.  
  3. Turn the ignition switch to the OFF position. Remove the electronics box cover in the rear right of the engine compartment. Disconnect the plug from the forward control unit. Fill the reservoir with hydraulic fluid.
  4.  
  5. Connect the control unit and run the engine for 1 minute.
  6.  
  7. Connect tool 34 3 110 or equivalent, to the plunger-type hydraulic control unit bleeder screw. Place the hose into the reservoir and loosen the bleeder screw. Allow fluid to flow for 15 seconds or until the flow is without bubbles.
  8.  

 
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