Genuine Audi 100 Power Steering Pump

Audi 100 Power Steering Pump Parts and Q&A

• Power Steering Pump
  034-145-155-DX
  Q: What are the steps required for refitting the power steering pump and associated components on Audi 100?

  A:

  New fluid pipe sealing rings will be required on refitting. On models equipped with self-levelling rear suspension, the power steering pump also operates the hydraulic self-levelling system, and a new suspension system hydraulic hose union bolt will be required on refitting. Firmly apply the handbrake, jack up the front of the vehicle, and support it on axle stands. Remove the retaining screws and fasteners to take off the undercover from beneath the engine/transmission unit. Loosen the bolts securing the pulley(s) to the power steering pump and release the auxiliary drivebelt(s) from the power steering pump pulley(s). Use brake hose clamps to clamp both the supply and return hoses near the power steering fluid reservoir to minimize fluid loss during subsequent operations. Unscrew the retaining bolts and remove the pulley(s) from the pump, then wipe clean the area around the power steering pump fluid pipe unions. On 4-cylinder engines, make alignment marks between the pipe unions and pump to avoid confusion on refitting, unscrew the union bolts, and disconnect fluid pipes from the pump while being prepared for fluid spillage; position a suitable container beneath the pipes while unscrewing the union bolts. Disconnect the pipes and recover the sealing rings, discarding the old ones as new ones must be used on refitting. Plug the pipe ends and steering pump orifices to minimize fluid leakage and keep dirt out of the hydraulic system. On models with self-levelling suspension, the suspension system pipe union bolt should be renewed whenever it is removed. On 5-cylinder engines, slacken the retaining clip and disconnect the fluid supply hose from the pump, then slacken the union bolt(s) and disconnect the outlet pipe(s), being prepared for some fluid spillage and plugging the hose/pipe ends and pump unions to minimize fluid loss and prevent dirt entry into the system. Discard the outlet pipe sealing rings as new ones must be used on refitting. Slacken and remove the pump mounting bolts and withdraw the pump from its bracket. If the power steering pump is faulty, it must be renewed as it is a sealed unit and cannot be overhauled. To refit, manoeuvre the pump into position and refit its mounting bolts. On models with a spring-loaded auxiliary drivebelt tensioner, tighten the mounting bolts to the specified torque, and on models where the drivebelt tension is adjusted by pivoting the pump, tighten the bolts lightly only at this stage. Fit a new sealing ring to each side of the hydraulic pipe end fittings, reconnect the pipe(s) to the pump, and screw in the union bolt(s), ensuring the pipe(s) is/are correctly routed before tightening the union bolt(s) to the specified torque. On 5-cylinder engines, reconnect the supply hose to the pump and secure it with the retaining clip, then remove the brake hose clamps used to minimize fluid loss. Refit the pulley(s) to the pump, screw in the retaining bolts, and tighten them to the specified torque. Refit the auxiliary drivebelt(s) and tension it, tightening the pump mounting bolts to the specified torque if not already done. Finally, refit the undercover, ensuring it is securely held by all its retaining screws and fasteners, and on completion, bleed the hydraulic system.