OEM 2007 Toyota Avalon Power Steering Pump

2007 Toyota Avalon Parts Questions & Experts Answers

• Q: How to service and repair the power steering pump on 2007 Toyota Avalon?

  A: Service and repair of the power steering pump requires removing the front wheel RH followed by power steering fluid draining and front fender apron seal RH removal. The maintenance of power steering pump starts by removing the fan and generator V belt followed by disconnecting the oil reservoir to pump hose No.1 clip and finally removing the union bolt to separate the pressure feed tube assembly clamp. First disconnect the connector from the power steering oil pressure switch then use two bolt removal to take out the vane pump assembly. The vane pump assembly must be fixed in a vise using a Special Service Tool: 09630-00014 (09631-00132) to proceed with disassembly where operators must remove power steering suction port union along with the O-ring followed by the flow control valve and compression spring. Purposefully separate the power steering oil pressure switch and its O-ring followed by disconnecting the vane pump housing rear and its O-ring. Start by taking out the w/ pulley shaft sub-assembly and 10 vane pump plates together with the vane pump rotor and vane pump cam ring along with the vane pump side plate front which includes its O-rings. Remove the vane pump housing oil seal by taking caution to prevent damage to the housing front component. Measure the oil clearance of the vane pump shaft to verify that it remains below 0.07 mm (0.0028 in.) while comparing the vane pump rotor thickness which should fall between 1.405 to 1.411 mm (0.05531 to 0.05555 in.). Under compressed air testing verify smooth operation of the flow control valve as well as inspect the vane plates against the vane pump rotor groove clearance which should stay under 0.03 mm (0.0012 in.). First check the free length of the compression spring exceeds 36.9 mm (1.453 in.) and then inspect the pressure port union for damage. Reassemble operations start by using Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (09951-07100) and a press to install a new vane pump housing oil seal which received power steering fluid coating in correct orientation. Slip in the w/pulley shaft sub-assembly while taking precaution to avoid oil seal lip damage and then install the vane pump side plate front coupled with the cam ring and ensure dents match each other correctly. The vane pump assemblies require a power steering fluid coating before installing both plates and rotor. Post the install of a new snap ring to the w/ pulley shaft sub-assembly the vane pump housing rear with a new O-ring should be installed before final torque setting to 22 N m (224 kgf cm, 16 ft. lbf). A new O-ring goes on the power steering oil pressure switch before installation by using a torque of 21 N m (214 kgf cm, 16 ft. lbf). After installing the flow control valve with a compression spring users should add the pressure port union and torque it to 69 N m before applying the power steering suction port union with new O-ring and torquing it to 12 N m. Reinstall the vane pump assembly using two bolts at 43 N m torque while using a new gasket for the pressure feed tube assembly that requires a union bolt with torque at 52 N m. Complete the installation by securing the pressure feed tube clamp. The installation ends with reconnecting the oil reservoir to pump hose No.1 then reinstalling the generator V belt, the front fender apron seal RH, and the front wheel RH. The last step requires bleeding the power steering before checking for fluid leaks.