GM Full-Size Trucks 1980-1987 Repair Guide

Power Steering Pump

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REMOVAL & INSTALLATION



See Figures 1, 2 and 3

  1. Disconnect hoses at pump. When hoses are disconnected, secure ends in raised position to prevent drainage of oil. Cap or tape the ends of the hoses to prevent entrance of dirt.
  2.  

On models with remote reservoir, disconnect reservoir hose at pump and secure in raised position. Cap hose pump fittings.



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Fig. Fig. 1: Power steering pump mounting

  1. Install two caps at pump fittings to prevent drainage of oil from pump.
  2.  
  3. Loosen bracket-to-pump mounting nuts.
  4.  
  5. Remove the pump drive belt.
  6.  



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Fig. Fig. 2: A variety of wrenches and ratchet extensions will be helpful for steering pump removal



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Fig. Fig. 3: On vehicles equipped with A/C, the compressor creates an additional challenge to accessing pump bolts

  1. Remove pump from attaching parts and remove pump from vehicle.
  2.  

To install:
  1. Position pump assembly on vehicle and install and tighten the attaching bolts 35 ft. lbs. (48 Nm).
  2.  
  3. Connect and tighten hose fittings and tighten to 20 ft. lbs. (27 Nm).
  4.  
  5. Fill reservoir. Bleed pump by turning pulley backward (counterclockwise as viewed from front) until air bubbles cease to appear).
  6.  
  7. Install pump belt over pulley.
  8.  
  9. Tension belt as outlined under Pump Belt Tension Adjustment in this section.
  10.  
  11. Bleed as outlined under Bleeding Power Steering System.
  12.  

BLEEDING POWER STEERING SYSTEM



  1. Fill oil reservoir to proper level and let oil remain undisturbed for at least two minutes.
  2.  
  3. Start engine and run only for about two seconds.
  4.  
  5. Add oil if necessary.
  6.  
  7. Repeat above procedure until oil level remains constant after running engine.
  8.  
  9. Raise front end of vehicle so that wheels are off the ground.
  10.  
  11. Increase engine speed to approximately 1500 rpm.
  12.  
  13. Turn the wheels (off ground) right and left, lightly contacting the wheel stops.
  14.  
  15. Add oil if necessary.
  16.  
  17. Lower the vehicle and turn wheels right and left on the ground.
  18.  
  19. Check oil level and refill as required.
  20.  
  21. If oil is extremely foamy, allow vehicle to stand a few minutes with engine off and repeat above procedure.
    1. Check belt tightness and check for a bent or loose pulley. (Pulley should not wobble with engine running).
    2.  
    3. Check to make sure hoses are not touching any other parts of the truck, particularly sheet metal except where design calls for a clamp.
    4.  
    5. Check oil level, filling to proper level if necessary, following operations 1 through 10. This step and Step d are extremely important as low oil level and/or air in the oil are the most frequent causes of objectional pump noise.
    6.  
    7. Check the presence of air in the oil. If air is present, attempt to bleed system as described in operations 1 through 10. If it becomes obvious that the pump will not bleed after a few trials, proceed as outlined under Hydraulic System Checks.
    8.  

  22.  

 
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