2. Plug the pump openings with suitable plugs.
3. Connect the special plug to the hand vacuum pump.
4. Install the plug in place of the pump tank cover.
5. Create a vacuum in the tank of about 68 kPa, but no more.
6. If the vacuum is released again, repair or replace the pump. If the vacuum remains constant, check other parts of the power steering system.
7. Observe the condition of the liquid in the tank.
Note: The liquid should not foam or bubble. Periodic appearance of air bubbles indicates poor hose connection or damage to the hose sealing rings.
8. If foaming occurs, replace the following parts:
- return hose clamps;
- return hose sealing rings;
- pressure hose sealing rings;
- steering gear tube sealing rings;
- sealing ring between the tank and the pump.
9. Bleed the power steering system.
10. Make a test drive of about 20 km to warm up the fluid in the system. Place the car on a flat horizontal surface.
11. Make sure that the following conditions are met:
- the amplifier operates smoothly;
- the car responds adequately to steering wheel movements;
- a constant liquid level is maintained in the pump tank;
- no liquid leaks;
- the liquid does not foam or change color.
The article was borrowed from the website «ChevyMan»