Genuine Audi A4 Power Steering Pump

Audi A4 Power Steering Pump Parts and Q&A

• Power Steering Pump
  8E0-145-153-H
  Q: How to disconnect and replace the power steering pump on Audi A4?

  A:

  Unplug the cable on the negative end of the battery and take off the drivebelt. In the case of four-cylinder models, lift the front of the vehicle and rest it on the jackstands, then take away the splash shield under the vehicle, the front bumper, and relocate the radiator support panel to the service position. Disconnect the power steering pump drivebelt, clamp both supply and return hoses around the power steering fluid reservoir to reduce the loss of fluid and wipe the area around the power steering pressure and return line fittings. Do this by unscrewing the banjo bolt and unscrewing the pressure line on the pump, and by placing a container under the pipe when doing it, in case of fluid spillage, and unscrewing the filling bolt. Un-plug the line and retrieve the sealing washers and dispose them as new ones would be required to be used during reassembly. Insert the end of the line and the orifice of the steering pump in order to reduce the fluid leakage and keep dirt out of the hydraulic system. Unscrew the clamp and unplug the hose of the fluid supply on the back of the power steering pump, and plug the end of the hose and cover the pump fluid port to avoid contamination. Unscrew the pump mounting fasteners, and dismount the pump off its bracket, observing that in some instances the mounting fasteners and the pulley may have to be detached off of the pump. In case the power steering pump is defective, it should be replaced since it is a closed system which cannot be serviced. In case new pump is to be installed, before it is started it should be primed with fluid to provide sufficient lubrication during the initial stages of operation otherwise it may run noisily and may fail within short time. In order to start the pump, add the required grade of hydraulic fluid in the fluid supply port of the pump and at the same time rotate the pump pulley until fluid is released to the pressure port. Install pump and screw in the mounting bolts and tighten the bolts to the torque. Install the pressure line to the pump using new sealing washers, and make sure that the line is correctly laid, and that the banjo bolt is tightened to the torque. Reconnect the supply hose up to the pump and lock up the retaining clip and then take off the hose clamps applied to ensure minimal loss of fluid. Attach the steering pump pulley (optional) will be removed, the power steering pump drivebelt, radiator support panel, the front bumper, and the bottom splash shield. Re-attach the negative battery cable, fill the hydraulic and bleed the hydraulic system. To work on V6 models, lift up the engine cover on the top, unscrew the pulley off the pump with a strap wrench so that it does not rotate, and unscrew the rear mount of the power steering pump with a long extension and socket above. Unscrew the banjo bolt and unattach the pressure line to the pump, expecting the spillage of fluid but take back the sealing washers, which should be disposed of and new ones got when assembling. Insert the end of the line and the orifice of the steering pump in order to reduce the fluid leakage and keep dirt out of the hydraulic system. Unclamp and unlink the hose supplying the fluid to the pump and seal the end of the hose and cover the pump fluid port to avoid contamination. Unbind the fasteners of the pump bracket mounting and loosen the pump and the bracket with the engine, and unattach the pump with the mounting bracket, by removing the fasteners. In case the power steering pump is defective, it should be replaced since it is a closed system which cannot be serviced. In case new pump is to be installed, before it is started it should be primed with fluid to provide sufficient lubrication during the initial stages of operation otherwise it may run noisily and may fail within short time. To start the pump, fill the pump by pouring the predetermined grade of power steering fluid to the fluid supply inlet on the pump and at the same time move the pump pulley until the fluid comes out of the pressure inlet. Install the mounting fasteners, position the pump and the bracket and tighten them to the torque. Install the pressure line to the pump using new sealing washers, and make sure that the line is correctly laid, and that the banjo bolt is tightened to the torque. Reconnect the supply hose up to the pump and lock up the retaining clip and then take off the hose clamps applied to ensure minimal loss of fluid. Connect the pulley with the bolts to the torque, put in place the ignition coil assembly, and the top cover of the engine. Connect the negative battery cable again, refill the power steering fluid and bleed the system.