OEM 2001 Toyota Corolla Power Steering Pump

2001 Toyota Corolla Parts Questions & Experts Answers

• Q: How to service and repair the power steering pump on 2001 Toyota Corolla?

  A: The power steering pump repair process should begin with measuring PS vane pump rotating torque followed by assessing rotational smoothness and eliminating abnormal noise until the torque reaches 0.3 Nm (2.8 kgf-cm, 2.4 inch lbs.). Start service and repair of the power steering pump by uninstalling the suction port union through bracket bolt removal followed by taking out the two set bolts and O-ring. The pressure feed No.1 tube needs removal through union bolt extraction while gaskets separate from it before proceeding to remove the pressure port union and its O-ring. Before proceeding remove the flow control valve with spring and then disconnect the rear housing and wave washer before taking off the side plate to remove installed O-rings. Disassemble the cam ring along with 10 vane plates and vane pump rotor by employing pliers to obtain the gasket and two straight pins. Use proper caution while pressing out the snap ring of the vane pump shaft with bearing to avoid damaging its oil seal lip. Check the vane pump shaft bushing oil clearance to range between 0.03 to 0.05 mm (0.0012 to 0.0020 inch) with a maximum value of 0.07 mm (0.0028 inch) and consider part replacement if needed. The 10 vane plates require measurements of height and thickness and length to verify minimum standards and vane pump rotor groove-vane plate clearance needs to stay under 0.03 mm (0.0012 inch). A proper inspection of the flow control valve should be performed for smooth operation and leak prevention. Replace the valve if identified as defective when selecting a replacement with the same inscribed mark from the options A, B, C, D, E, or F. A measurement assessment of the spring free length should be undertaken and the spring replaced when its length measures less than 33.2 mm (1.307 inch). To change the oil seal you must use Special Service Tool: 09631-10030 but handle the bushing with care while installing a fresh oil seal using Special Service Tool: 09950-60010 (09951-00340) or 09950-70010 (09951-07100) correctly oriented. Replacement of the bearing requires careful shaft vane pump preservation while pressing out the old bearing to press in a new one. The reassembly procedure requires power steering fluid coating of designated parts before installing the vane pump shaft with bearing by using Special Service Tool: 09608-04031. Secure this setup with a new snap ring. Install two new straight pins before placing the cam ring which should face outward and follow it with the vane pump rotor which must have its inscribed mark showing outward. Attack the installation of 10 vane plates by attaching them with round ends facing out while using a new gasket on the front housing but maintain proper gasket orientation. Place the side plate with a new O-ring that received power steering fluid coating next to the straight pins before adding the wave washer. Install a new O-ring that received power steering fluid coating then place it onto the rear housing and tighten four bolts to 24 Nm (240 kgf-cm, 17 ft. lbs.). Place the spring followed by the flow control valve with proper orientation before applying power steering fluid to a new O-ring for installation on the pressure port union where you will securely tighten it to 83 Nm (850 kgf-cm, 61 ft. lbs.). For the pressure feed No. 1 tube installation use new gaskets and apply a union bolt with torque set to 69 Nm at 700 kgf-cm and 51 ft. lbs. Then install the suction port union with its new O-ring by tightening to 13 Nm at 130 kgf-cm while the bracket bolt needs 43 Nm torque at 440 kgf-cm and 32 ft. lbs. The rotating torque of the PS vane pump needs measurement as the final test.