Volvo Coupes/Sedans/Wagons 1970-1989 Repair Guide

Power Steering Pump

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See Figures 1 and 2



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Fig. Fig. 1: Troubleshooting the Power Steering Pump



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Fig. Fig. 2: Troubleshooting the Power Steering Pump

REMOVAL & INSTALLATION



1800 and 140/160 Series
  1. Remove all dirt and grease from around the line connections at the pump.
  2.  
  3. Using a container to catch any power steering fluid that might run out, disconnect the lines, and plug them to prevent dirt from entering the system.
  4.  
  5. Remove the tensioning bolt and the attaching bolts.
  6.  
  7. Clear the pump of the fan belt and lift it out.
  8.  
  9. If a new pump is to be used, the old brackets, fittings, and pulley must be transferred to the new unit. The pulley may be removed with a puller and pressed onto the new pump shaft with a press tool. Under no circumstances should the pulley be hammered on; this will damage the pump bearings.
  10.  

To install:
  1. Place the pump in position and loosely fit the attaching bolts. Connect the lines to the pump with new seals.
  2.  
  3. Place the fan belt onto the pulley and adjust the fan belt tension.
  4.  
  5. Tighten the tensioning bolt and the attaching bolts.
  6.  
  7. Fill the reservoir with Type A automatic transmission fluid and bleed the system as outlined under Power Steering System Bleeding.
  8.  

200 Series
  1. Remove all dirt and grease from around the line connections at the pump.
  2.  
  3. Using a container to catch any power steering fluid that might run out, disconnect the lines, and plug them to prevent dirt from entering the system.
  4.  
  5. Remove the tensioner locking screws on both sides of the pump and remove the drive belt.
  6.  
  7. Turn the pump up and remove the three bolts holding the bracket to the engine block. Remove the pump and bracket.
  8.  

To install:
  1. If the pump is being replaced with a new one, remove the nut and pulley from the old pump and transfer it to the new one. Separate the bracket and tensioner from the pump and install them loosely on the new pump.
  2.  
  3. Place the pump in position on the engine and install the retaining bolts and spacer.
  4.  
  5. Install the drive belt and install the tensioner lock.
  6.  
  7. Adjust the belt tension and then tighten the nuts of the long bolts.
  8.  
  9. Use new copper washers and reconnect the fluid lines to the pump.
  10.  
  11. Fill the reservoir with Type A or Dexron®II automatic transmission fluid and bleed the system as outlined under Power Steering System Bleeding.
  12.  

700 Series

See Figure 3

  1. Remove the splashguard from under the engine.
  2.  
  3. Loosen the belt tensioner. Remove the mounting bracket and bolt.
  4.  
  5. Disconnect the lines at or near the pump. Depending on the type of pump, it may be necessary to disconnect the rubber hose(s) from the metal pipes instead of removing the lines at the pump body. Use a catch pan under the car for spillage and plug the lines and fittings immediately to avoid contamination.
  6.  
  7. Remove the large retaining bolt and remove the drive belt from the pump.
  8.  



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Fig. Fig. 3: Cutaway view of the power steering system-700 series

  1. Lower the pump slightly and disconnect the filler hose from the pump. Remove the pump from the car.
  2.  

To install:
  1. If the pump is to be replaced with a new one, transfer the pulley, the mounting bracket and the washers to the new pump. Install the mounting bracket on the new pump; make sure the thick washer is between the bracket and the pump body. Install the pulley; remember that the conical face of the washer must be to the outside.
  2.  
  3. Reconnect the filler hose to the pump.
  4.  
  5. Position the pump and install the retaining bolts loosely.
  6.  
  7. Install the mounting bracket and belt. Adjust the belt tension.
  8.  
  9. Tighten the lower retaining bolts.
  10.  
  11. Reconnect the fluid hoses to the pump. Use new washers and/or hose clamps. Tighten the banjo fittings (if any) to 31 ft. lbs. (42 Nm).
  12.  
  13. Fill the fluid reservoir and start the engine. Slowly turn the wheel lock to lock once or twice and check for leaks. Top the fluid to the proper level.
  14.  
  15. Reinstall the splashguard. The power steering system is self-bleeding; no external bleeding is required.
  16.  

POWER STEERING SYSTEM BLEEDING



See figure 4

Bleeding removes any air which become trapped within the fluid system. The system should be bled every time any hose or component has been loosened or removed. The system should also be bled if it has run low on fluid during operation.

  1. Fill the reservoir with the proper type of fluid. Raise the front wheels off the ground, and install jackstands. Place the transmission in neutral and apply the parking brake.
  2.  
  3. Keeping a can of fluid within easy reach, start the engine and fill the reservoir as the level drops.
  4.  
  5. When the reservoir level has stopped dropping, slowly turn the steering wheel from lock-to-lock several times. Fill the reservoir if necessary.
  6.  
  7. Locate the bleeder screw (non-rack and pinion steering models only) on the power steering gearbox. Open the bleeder screw about 3 / 4 turn, and close it when oil starts flowing out.
  8.  
  9. Continue to turn the steering wheel slowly until the fluid in the reservoir is free of air bubbles.
  10.  
  11. Stop the engine and observe the oil level in the reservoir. If the oil level rises more than 1 / 4 in. (6mm) past the level mark, air still remains in the system. Continue bleeding until the level rise is correct.
  12.  
  13. Remove the jackstands and lower the car.
  14.  



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Fig. Fig. 4: Troubleshooting Basic Steeringand Suspension Problems

 
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