OEM Scion Power Steering Pump

Scion Power Steering Pump Parts Questions & Experts Answers

• Power Steering Pump
  44310-21050
  Q: How to service and repair the power steering pump on Scion tC?

  A: Your first action in servicing or repairing the power steering pump should involve removing the RH front wheel followed by drain pumping the power steering fluid then removing the front fender apron seal RH. Start by extracting the fan and generator V belt before unclipping the No. 1 oil reservoir to pump hose. It is essential to take care when working with the V belt to avoid fluid leakage. The pressure feed tube assembly can be detached through the removal of its bolt and subsequent disconnection from the pump bracket rear while using a 27 mm wrench to maintain pressure port union stability during screw and gasket removal. The vane pump assembly removal begins by disconnecting the oil pressure switch connector followed by using SST 09249-63010 to loosen the 2 bolts which will enable removal of the vane pump. Fix the vane pump assembly inside an SST 09630-00014 (09631-00132) vise prior to removing the rear vane pump bracket and power steering suction union port bolt with O-ring. After removal of the flow control valve and pressure port union and its O-ring the power steering oil pressure switch should be replaced if found damaged. Access the rear vane pump housing by unfastening its 4 bolts and O-ring before you disassemble the shaft sub-assembly with pulley by applying 2 screwdrivers to remove the snap ring. The technician should commence the disassembly by taking out the vane pump rotor and the 10 vane pump plates together with the vane pump cam ring and front vane pump side plate where all components require O-ring removal. The removal of the vane pump housing oil seal requires special care because it may damage the front housing structure. A professional should check the oil clearance between vane pump shaft and bush in housing front by measuring to prevent excess clearance of 0.07 mm (0.0028 inch). The thickness measurement of vane pump plates should fall within the range of 1.405 to 1.411 mm (0.05531 to 0.05555 inch) while maintaining a clearance check between vane pump rotor groove and vane plates under 0.03 mm (0.0012 inch). Check the flow control valve for proper operation and leakage while measuring its compression spring free length to be at minimum 36.9 mm (1.453 inch). The vane pump assembly requires replacement when additional specifications or damage signs appear in any component. To install the new oil seal apply power steering fluid onto its lips before insertion with SST 09950-60010 (09951-00280) or 09950-70010 (09951-07100) while maintaining the precise installation direction. Put the pulley shaft inside slowly while checking for damage to the oil seal lip before placing the front vane pump side plate with O-rings correctly positioned. Enable vane pump cam ring installation by placing its inscribed mark at the top before inserting vane pump rotor and plates where round ends must face outward. Place a new snap ring on the shaft before applying power steering fluid to a fresh O-ring which you will install onto the rear housing after positioning it correctly then applying four bolts with 22 Nm (224 kgf-cm, 16 ft. lbs. of torque. The service bolt installation should proceed after ensuring the pump operates without resistance while measuring the pulley rotating torque where 0.27 Nm (2.8 kgf-cm, 2.4 ft. lbs.) represents an acceptable reading criterion. When mounting the power steering oil pressure switch it should have 21 Nm torque (214 kgf-cm, 15 ft. lbs.) and flow control valve plus compression spring must follow with power steering fluid application before final installation. Mount the pressure port union by applying 69 Nm torque to the new O-ring before securing the rear vane pump bracket at 37 Nm to allow the stopper to contact the body of the pump. The power steering suction port union gets installed using a new O-ring at 12 Nm of torque (122 kgf-cm, 9 ft. lbs.) before the vane pump assembly goes in and the bolts should be tightened at 34 Nm (347 kgf-cm, 25 ft. lbs.) using tool SST 09249-63010. Carefully connect the pressure feed tube assembly and the No. 1 oil reservoir for the pump hose tubing before reinstalling the fan and generator V belt and the front fender apron seal RH along with the front wheel RH. Perform a fluid bleed on power steering then investigate for any fluid leakage.
• Power Steering Pump
  44310-52050
  Q: How to service and repair the power steering pump on Scion xA?

  A: The service and repair process for the power steering pump starts with disreturning the front wiper arms (LH and RH) and hood to cowl top seal and cowl top ventilator louvers (LH and RH) along with windshield wiper link assembly, cowl panel sub-assembly, and vane pump oil reservoir cover. Begin the power steering fluid drain before taking out the front right wheel and right-hand engine under cover. The pressure feed tube assembly needs to be separated with Special Service Tool: 09023-12701 before disconnecting the return hose along with the oil pressure sensor connector. Initial vane pump maintenance begins with removing the bolt while also taking out the stay rear and heat insulator before proceeding to separate the vane pump assembly through bolts B and C while loosening bolt A. Secure the vane pump assembly within a vise and remove the vane pump oil reservoir cap sub-assembly followed by the oil reservoir assembly where specialist tool 09630-00014 (09631-00132) assists while handling the O-ring. The service procedure requires removing the pump bracket front along with the flow control valve, power steering oil pressure sensor, vane pump housing rear, w/pulley shaft sub-assembly, vane pump rotor, cam ring, side plate front in a specific order while removing every O-ring present. The vane pump shaft along with bush in the housing front should receive an inspection for oil clearance and the vane pump rotor and plates must be checked for thickness and clearance while investigating the flow control valve for smooth operation and leakage as well as inspecting the compression spring for free length and the pressure port union for damage. The proper installation requires a new housing oil seal together with a pulley shaft sub-assembly, side plate front equipped with new O-rings, cam ring followed by the vane pump rotor with plates, and snap ring. Installation of vane pump housing rear requires a new O-ring while following torque requirements and achieving proper alignment. The preload should be validated through normal pump rotation combined with rotating torque measurement. Install the power steering oil pressure sensor using a new O-ring then install the flow control valve components and its parts followed by the pump bracket front and vane pump oil reservoir assembly and cap sub-assembly according to torque specifications. Install the vane pump assembly together with necessary V belt tension control and secure the rear vane pump stay. Use Special Service Tool: 09023-12701 to properly connect the pressure feed tube assembly while observing torque specifications and complete the process by adding the return hose and oil pressure sensor connector. The vane pump requires belt adjustment followed by drive belt inspection of tension and deflection levels while technicians need to measure and add power steering fluid before bleeding the system and spotting any leaks. Reinstallation begins by putting on the right-hand engine under cover together with the specified torque for the right-hand front wheel and checking power steering fluid volume in the reservoir before reinstalling the vane pump oil reservoir cover along with the cowl panel sub-assembly, windshield wiper link assembly, cowl top ventilator louvers on both sides and the hood to cowl top seal and front wiper arms (LH and RH).
• Power Steering Pump
  44310-52090
  Q: How to service and repair the power steering pump on Scion xB?

  A: Serviceable power steering pump repair starts with removal of the front wiper arms together with the hood to cowl top seal alongside the cowl top ventilator louvers (each side) along with the windshield wiper link assembly and the cowl panel sub-assembly and vane pump oil reservoir cover. Before starting service and repair on the power steering pump drain all fluid and take off the front wheel (RH) with the engine under cover (RH). Remove the pressure feed tube assembly through the usage of Special Service Tool: 09023-12700 to disconnect both the return hose and oil pressure sensor connector. Detach the vane pump stay rear by unbolting its components including bolt, stay rear and heat insulator. Once the vane pump assembly is secured in the vise with Special Service Tool: 09630-00014 (09631-00132), proceed by removing the vane pump oil reservoir cap sub-assembly and the oil reservoir assembly while being cautious to salvage the O-ring. The next step requires removing the pump bracket front together with flow control valve and power steering oil pressure sensor and the vane pump housing rear while removing the O-ring. The w/pulley shaft sub-assembly and vane pump rotor should be removed together with the cam ring and then followed by removing the vane pump side plate front and its O-rings. Pronounce caution when removing the housing oil seal to prevent any form of breakage. The vane pump shaft together with housing front bush needs inspection for oil clearance that should remain under 0.07 mm (0.0028 inch). The measurement of vane pump plate thickness should fall between 1.405 to 1.411 mm (0.05531 to 0.05555 inch) while the vane pump rotor groove clearance must not exceed 0.03 mm (0.0012 inch). The inspection of the flow control valve must check for smooth functions without leakage, while the compression spring free length should measure at least 29.2 mm (1.150 inch). The vane pump assembly requires component replacement when it contains elements which have suffered damage or moved outside their specified parameters. Install the new housing oil seal following procedure with Special Service Tools: 09950-60010 (09951-00280), 09950-70010 (09951-07100), a press necessary for correct assembly. The w/pulley shaft sub-assembly requires power steering fluid on its housing front bushing surface before installation while avoiding damage to the oil seal lip. To assemble the vane pump system start by correctly aligning the vane pump side plate front and cam ring unit before adding the rotor and plates while applying power steering fluid onto the plates. Insert a newly fitted snap ring onto the w/pulley shaft sub-assembly before attaching the vane pump housing rear section with its new O-ring. Perform this installation operation by achieving correct alignment and torquing it to 22 Nm (224 kgf-cm, 16 ft. lbs.). Users should check for smooth pump rotation and measure the rotating torque that should be 0.27 Nm or less (2.8 kgf-cm, 2.4 inch lbs.). First install the power steering oil pressure sensor by applying a new O-ring then torqueing to 21 Nm (214 kgf-cm, 15 ft. lbs.). Afterward install the flow control valve using its components and torque the pressure port union to 69 Nm (704 kgf-cm, 51 ft. lbs.). Install the front portion of the pump bracket by torquing it to 44 Nm (449 kgf-cm, 32 ft. lbs.) before installing the vane pump oil reservoir assembly with a new O-ring while torquing to 9.0 Nm (92 kgf-cm, 80 inch lbs.). Proceed with installing vane pump components while the V belt must be tensioned before complete torquing. Use Special Service Tool: 09023-12700 to install the pressure feed tube assembly by torquing it to 41 Nm (414 kgf-cm, 30 ft. lbs.) following proper installation of the heat insulator on the vane pump stay rear. Adjust the V belt then inspect drive belt deflection before checking tension together with adding power steering fluid and bleeding the system and inspecting fluid leaks. reinstall the engine under cover (RH), front wheel (RH) with 103 Nm (1,050 kgf-cm, 76 ft. lbs.) torque then continue with checking the power steering fluid level for the reservoir and replacing the vane pump oil reservoir cover, cowl panel sub-assembly, windshield wiper link assembly, cowl top ventilator louvers (LH and RH) and the front wiper arms (LH and RH).