OEM 2006 Scion xB Power Steering Pump

2006 Scion xB Power Steering Pump Parts Questions & Experts Answers

• Q: How to service and repair the power steering pump on 2006 Scion xB?

  A: The power steering pump servicing process starts with rear wiper removal of both blades from right and left sides along with hood to cowl top seal removal. Cowl top ventilator louvers from both sides need attention while windshield wiper links and cowl panel sub-assemblies must also be detached. You need to drain power steering fluid while you expose and eliminate the vane pump oil reservoir cover. The service flow requires dismounting the front right wheel along with the engine under cover from the right side but before that utilize Special Service Tool: 09023-12701 to separate the pressure feed tube assembly by slowly sliding the clip to disconnect the return hose without fluid leak onto the V belt while also disconnecting the oil pressure sensor connector. Extract the vane pump stay from the rear position by disassembling bolt and stay along with heat insulator before moving to the vane pump assembly where you can remove bolts B and C and adjusting strut yet keep bolt A loose enough for extraction. Use Special Service Tool: 09630-00014 (09631-00132) to fix the vane pump assembly in a vise before taking out the three bolts securing the oil reservoir cap sub-assembly and its oil reservoir along with the O-ring. You need to first disassemble the front pump bracket using two bolts before moving onto the flow control valve with its O-ring as well as the power steering oil pressure sensor from the front housing. Rotate the shaft sub-assembly with pulley out by using two screwdrivers to remove the snap ring. Then separate the shaft from the assembly using two screwdrivers. After that, detach the rear vane pump housing through removal of four bolts and its O-ring. The vane pump rotor plates and front vane pump side plate together with its O-rings must be removed. A screwdriver along with cloth allows you to remove the housing oil seal from its position without damaging the front housing area. The front vane pump shaft and its bush in the housing should be investigated for oil clearance which must stay below 0.07 mm (0.0028 inch) and the vane pump rotor and plates must have a thickness between 1.405 to 1.411 mm (0.05531 to 0.05555 inch). Check the flow control valve for proper functioning while inspecting for leaks and measure the compression spring length must exceed 29.2 mm (1.150 inch). The vane pump assembly needs replacement when the pressure port union develops damage. Reassembly requires a freshly coated power steering fluid applied on the new housing oil seal by using Service Tools 09950-60010 (09951-00280) along with 09950-70010 (09951-07100) and a press before inserting the shaft sub-assembly with pulley while avoiding oil seal lip damage. Insert new O-rings to the vane pump side plate before placing the cam ring and rotor and plates inside the pump while verifying appropriate installation orientation. First install a new snap ring to the shaft before applying power steering fluid to an O-ring which then gets installed on the rear housing by aligning the cam ring and front housing and using four bolts with torque set to 22 Nm (224 kgf-cm, 16 ft. lbs.). Follow these steps in order to install the power steering system components: first check the pump for smooth rotation then install the pressure sensor with an O-ring at 21 Nm (214 kgf-cm, 15 ft. lbs.) then the flow control valve and its components at 69 Nm (704 kgf-cm, 51 ft. lbs.). The assembly process requires the vane pump oil reservoir components with a new O-ring to be installed at 9.0 Nm (92 kgf-cm, 80 inch lbs.) followed by attaching the front pump bracket and installing the oil reservoir cap sub-assembly. For installation, coat indicated parts with power steering fluid, temporarily install the vane pump assembly with bolt A, then secure the adjusting strut with bolt B at 44 Nm (449 kgf-cm, 32 ft. lbs.) and bolt C. Install the rear vane pump stay and heat insulator, ensuring proper torque, then connect the pressure feed tube assembly using Special Service Tool: 09023-12701 at 41 Nm (414 kgf-cm, 30 ft. lbs.), ensuring proper installation and reconnect the return hose and oil pressure sensor connector. Adjust the vane pump V belt while checking drive belt deflection and tension and add power steering fluid and bleed air from the system before reinstallation of the engine under cover and front wheel with 103 Nm (1,050 kgf-cm, 76 ft. lbs.) torque. Conclude the procedure by inspecting power steering fluid level in the reservoir before reinstalling vane pump oil reservoir cover and cowl panel sub-assembly together with windshield wiper link assembly and cowl top ventilator louvers and hood to cowl top seal and both front wiper arm and blade assemblies.