OEM 2007 Toyota Corolla Power Steering Pump

2007 Toyota Corolla Parts Questions & Experts Answers

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

  A: The power steering pump repair process starts with removing the front wheel RH followed by draining power steering fluid and removing both engine under cover RH and power steering reservoir clip no. 1. Begin by taking off the fan and generator V belt followed by disconnecting the oil reservoir to pump hose No. 1 through clip removal and using Special Service Tool: 09023-12901 to detach the pressure feed tube assembly while removing its bolt and pressure feed tube clamp. Start by removing the vane pump bracket rear bolts followed by disconnecting the oil pressure switch connector then taking off its two bolts, two nuts and the vane pump assembly. Secure the vane pump assembly within a vise using Special Service Tool: 09630-00014 (09631-00132) to remove the power steering suction port union with its O-ring followed by the pressure port union with its O-ring and finally remove the flow control valve and its compression spring. The technician should pull out the oil pressure switch and the 4 bolts which secure the vane pump housing rear and the O-ring which sits on the vane pump housing front. Estimate a with pulley shaft sub-assembly through removal of its snap ring then extract the sub-assembly before collecting the 10 vane plates and vane pump rotor followed by vane pump cam ring and side plate front together with its O-rings. Use a screwdriver to extract the vane pump housing oil seal while guaranteeing safety of the front section. Use a micrometer and caliper gauge to verify oil clearance within 0.0017 inch (0.043 mm) and measure standard vane pump rotor plates to be between 0.0553 to 0.0556 inch (1.405 to 1.411 mm) and their clearance should not exceed 0.0010 inch (0.025 mm). Test the flow control valve operability while inspecting its leakage performance under compressed air pressures between 392 to 490 kPa (4 to 5 kgf-cm2, 57 to 71 psi). The flow control valve compression spring should have a free length measurement of 36.9 mm (1.453 inch) and pressure port union inspection should be performed for damage. Reassemble the parts with power steering fluid followed by installation of a new vane pump housing oil seal using Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (09951-07100) and a press. Perform this installation with proper orientation of the parts. Begin by inserting the with pulley shaft sub-assembly before placing the side plate front and O-rings before aligning the vane pump cam ring and rotor and vane plates ten pieces then installing the snap ring. Coincide the vane pump housing rear with an O-ring then install it together with the vane pump shaft snap ring and torque to 22 Nm (220 kgf-cm, 16 ft. lbs.). The power steering oil pressure switch requires installation with a torque of 21 Nm (214 kgf-cm, 16 ft. lbs.) while checking that the pump preload enables smooth rotation. The installation of flow control valve and compression spring requires power steering fluid to coat a new O-ring before adding the pressure port union with 69 Nm (704 kgf-cm, 51 ft. lbs.) torque. Power steering fluid must coat a new O-ring before installation of the power steering suction port union using 12 Nm torque while the vane pump assembly needs 2 bolts and nuts torqued to 37 Nm to complete assembly. Use Special Service Tool: 09023-12901 to guide the pressure feed tube assembly connection followed by pressure feed tube clamp attachment before connecting the oil reservoir to pump hose No. 1. You must reinstall the fan and generator V belt followed by power steering fluid addition and system bleaching before leak checks and rehanging of the engine under cover RH and front wheel RH under a torque of 103 Nm (1,050 kgf-cm, 76 ft. lbs.).