OEM 2005 Toyota Avalon Power Steering Pump

2005 Toyota Avalon Parts Questions & Experts Answers

• Q: How to service and repair the power steering pump on 2005 Toyota Avalon?

  A: Start servicing and repairing the power steering pump by discarding the front wheel RH and power steering fluid drain. The service begins with removal of the front fender apron seal RH plus the fan and generator V belt followed by separation of the oil reservoir to pump hose No.1 by removing its retaining clip. The pressure feed tube assembly needs its union bolt and clamp bolt removed to disconnect it. The gasket should be removed simultaneously. First disconnect the connector from the power steering oil pressure switch then remove the vane pump assembly by removing its two bolts. Next secure the vane pump assembly in a vise through use of Special Service Tool: 09630-00014 (09631-00132). Disconnect the pump by unscrewing the power steering suction port union bolt and removing its O-ring and then proceeding to detach the pressure port union along with its O-ring before withdrawing the flow control valve and compression spring. The vane pump housing front requires the removal of the power steering oil pressure switch which should be replaced if damaged. Two screwdrivers are needed to remove the snap ring before uninstalling the w/pulley shaft sub-assembly. Four bolts and an O-ring need to be removed from the vane pump housing rear before proceeding. Follow the removal procedure by first taking out the ten vane pump plates then the vane pump rotor followed by the vane pump cam ring until finally taking away the vane pump side plate front while removing the O-rings from the side plate and housing front. Take out the vane pump housing oil seal with caution while maintaining the housing front uninjured. The vane pump shaft and bush inside the housing front require oil clearance inspection to ensure it meets the maximum limit of 0.07 mm (0.0028 inch). Check that the vane pump plates have a thickness between 1.405 to 1.411 mm (0.05531 to 0.05555 inch) while monitoring the clearance between the vane pump rotor groove and the plates to remain below 0.03 mm (0.0012 inch). Apply power steering fluid to the flow control valve before putting it into its hole and test for leaks by using compressed air. Inspect the compression spring that should extend to a free length of 36.9 mm (1.453 inch). Replacement of the vane pump assembly must be done if the pressure port union shows signs of damage. Use Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (09951-07100) and a press to install a new vane pump housing oil seal that received power steering fluid coating according to correct installation direction. Insert the w/pulley shaft sub-assembly into its correct position while paying close attention to avoid damaging the oil seal lip. We must install both the front side plate of the vane pump with new power steering fluid-coated O-rings which need to be properly aligned. Begin by placing the vane pump cam ring upward with its inscribed mark showing and then add rotor and plates with an application of power steering fluid on all surfaces. Attach the vane pump housing rear through its new O-ring after you properly align it before torquing to 22 Nm (224 kgf-cm, 16 ft. lbs.). To check pump rotation add the service bolt and verify the pulley rotating torque is 0.27 Nm (2.8 kgf-cm, 2.4 ft. lbs.) or lower. Start with the power steering oil pressure switch installation using a new O-ring then tighten it to 21 Nm (214 kgf-cm, 16 ft. lbs.). Next, apply power steering fluid to all parts before installing the flow control valve and compression spring. Install the pressure port union after adding a new O-ring and torque it to 69 Nm (704 kgf-cm, 51 ft. lbs.). Follow by adding the power steering suction port union with its new O-ring and torque it to 12 Nm (122 kgf-cm, 9 ft. lbs.). The vane pump assembly requires installation using two bolts that need to be torqued to 43 Nm (439 kgf-cm, 32 ft. lbs.) while following the procedure of reattaching the power steering oil pressure switch along with connecting the pressure feed tube assembly that has a new gasket secured by torquing the union bolt to 52 Nm (525 kgf-cm, 38 ft. lbs.). Install the pressure feed tube clamp and torque it to 9.8 Nm (100 kgf-cm, 87 inch lbs.) while reconnecting the oil reservoir to pump hose No.1, then reinstall the fan and generator V belt, the front fender apron seal RH and the front wheel RH secured with 103 Nm (1,050 kgf-cm, 76 ft. lbs.). The last task involves bleeding the power steering fluid system followed by leak inspection.