Toyota 44310-52050
Power Steering Pump

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).

The power steering pump service requires unbolted front wiper arms (LH and RH), hood to cowl top seal, cowl top ventilator louvers (LH and RH), windshield wiper link assembly, cowl panel sub-assembly, and vane pump oil reservoir cover. Start by draining power steering fluid and then remove the front wheel on the right-hand side and engine under cover also on the right. Remove the pressure feed tube assembly by using Special Service Tool: 09023-12700 and disconnect the return hose and the oil pressure sensor connector. The technician should first uninstall the vane pump stay rear by removing the bolt and stay rear and heat insulator. Next, the vane pump assembly can be dismantled with bolts B and C removal while loosening bolt A. After securing the vane pump assembly in a vise using Special Service Tool: 09630-00014 (09631-00132), technicians can proceed to remove the vane pump oil reservoir cap sub-assembly followed by removing the oil reservoir assembly while carefully extracting the O-ring. The next stage requires removal of the pump bracket front followed by the flow control valve and power steering oil pressure sensor and both the vane pump housing rear and its O-ring. With the proper tools remove the w/pulley shaft sub-assembly followed by the vane pump rotor wearing a cam ring as well as the side plate front and its O-rings together with those attached to the housing front. Remove the housing oil seal then inspect vane pump shaft and bush located in the housing front for maximum 0.07 mm oil clearance while checking the rotor and plates for minimum 1.405 to 1.411 mm thickness combined with maximum 0.03 mm clearance. Examine the flow control valve for proper operation while inspecting for leakage then check the compression spring free length (minimum measurement: 29.2 mm). The replacement of entire vane pump assembly must occur when any of its components surpasses their specified dimensions. Press and tool usage of 09950-60010 (09951-00280) and 09950-70010 (09951-07100) is necessary to install a new housing oil seal with correct positioning. Power steering fluid must coat the interior part of the housing front surface before inserting the w/pulley shaft sub-assembly. Then install the side plate front and cam ring while aligning their dents correctly. Insert the vane pump rotor then install the vane pump plates before positioning the snap ring on the w/pulley shaft sub-assembly. Secure the housing rear unit by using a new O-ring while maintaining correct positioning before torquing it to 22 Nm. Test the pump axle preload for steady movement before putting in the pressure sensor with a new O-ring and torquing it to 21 Nm. Secure the flow control valve along with the pressure port union by applying 69 Nm torque before proceeding to install the pump bracket front at a torque specification of 44 Nm. The vane pump oil reservoir assembly requires a new O-ring for installation before torquing it to 9.0 Nm followed by the vane pump oil reservoir cap sub-assembly. Use bolt A to temporarily install the vane pump assembly before putting on the adjusting strut and bolt B and torqueing to 44 Nm. The vane pump stay rear must be installed with the heat insulator while observing appropriate placement and torquing them to 44 Nm. Use Special Service Tool: 09023-12700 to attach the pressure feed tube assembly while tightening it to 41 Nm then verify the correct installation of return hose and oil pressure sensor connector. Start by adjusting the vane pump V belt before inspecting drive belt deflection while checking tension and completing power steering fluid filling and system bleeding before performing a fluid leak inspection. The final steps include reinstalling the engine under cover (RH) with 103 Nm torques on the front wheel (RH). Power steering fluid should be checked in the reservoir before reinstalling the vane pump oil reservoir cover and cowl panel sub-assembly, windshield wiper link assembly, cowl top ventilator louvers (LH and RH), hood to cowl top seal and front wiper arms (LH and RH).

Inspect the front vane pump shaft and bush in housing for oil clearance (maximum 0.07 mm), the vane pump rotor and plates for thickness (standard 1.405 to 1.411 mm), the flow control valve for smooth operation and leakage, the flow control valve compression spring (minimum free length 29.2 mm), and the pressure port union for damage.