OEM 2003 Toyota Corolla Power Steering Pump

2003 Toyota Corolla Parts Questions & Experts Answers

• Q: How to overhaul the power steering pump on 2003 Toyota Corolla?

  A: The power steering pump overhaul requires users to start by taking off the front wheel RH and draining power steering fluid while removing the engine under cover RH. Start by removing the fan and generator V belt followed by unclipping the oil reservoir to pump hose No.1. Special Service Tool: 09023-38400 will help disconnect the pressure feed tube assembly which needs additional removal of its clamp bolt. You should disconnect the oil pressure switch connector followed by removing and taking out the vane pump assembly using the combination of 2 bolts and nuts. Use 09630-00014 (09631-00132) Special Service Tool to secure the vane pump assembly in a vise before detaching the vane pump bracket rear by removing its bolt. Detach the power steering suction port union by removing its bolt and O-ring before taking out the pressure port union with its O-ring followed by the flow control valve with its compression spring. Complete the oil pressure switch removal without damaging it before proceeding to detach the vane pump housing rear through removal of its 4 bolts along with the O-ring. The w/pulley shaft sub-assembly requires removal through the sequence of snap ring removal followed by extraction of the vane pump rotor together with its 10 vane plates. Detach the vane pump cam ring by also removing the front side plate while properly taking out the O-rings. Extract the vane pump housing oil seal without damaging the pump housing through the use of Special Service Tool: 09631-10030 and a hammer. Use a micrometer and caliper gauge to measure the oil clearance before checking if it meets both the standard and maximum specified values. Measure height and thickness of the vane pump rotor and vane plates before checking the space between the rotor groove and vane plate during measurement. First examine the flow control valve operation while searching for any leakage then determine its compression spring's free length. The vane pump assembly requires immediate replacement whenever any component shows poor specifications or damage. The new vane pump housing oil seal needs proper orientation with power steering fluid coating for installation. Insert the w/pulley shaft sub-assembly while protecting the oil seal lip and attach the front side plate with new O-rings that received power steering fluid application. The vane pump cam ring first receives its installation together with the rotor but only when the rotor's inscribed marks face outward before moving onto the vane plates installation with a new snap ring addition. You will attach the vane pump housing rear through its proper alignment and with a new O-ring while using four bolts that should be tightened to 22 Nm (220 kgf-cm, 16 ft. lbs.). The vane pump should have smooth rotation before installation of a service bolt that measures a torque of less than 0.27 Nm (2.8 kgf-cm, 2.4 ft. lbs.). After installing the power steering oil pressure switch you should place a new O-ring then secure it at 21 Nm (210 kgf-cm) while also installing the flow control valve which receives its compression spring while ensuring all components are coated with power steering fluid. Together install both pressure port and power steering suction port unions which require torques of 69 Nm (700 kgf-cm, 51 ft. lbs.) and 12 Nm (120 kgf-cm, 9 ft. lbs.). Finishing the installation requires 2 bolts and nuts at 37 Nm (380 kgf-cm, 27 ft. lbs.) while also reconnecting the oil pressure switch connector and fastening the vane pump bracket rear. The installation of the pressure feed tube assembly requires the use of Special Service Tool: 09023-38400 to be torqued to 41 Nm (420 kgf-cm, 30 ft. lbs.) before clamping the pressure feed tube. The first step involves restoring the connection of oil reservoir to pump hose No.1 while also reinstalling the fan and generator V belt and tightening the front wheel RH at 103 Nm (1,050 kgf-cm, 76 ft. lbs.). Algebraically add power steering fluid to the system then bleed it while checking for any signs of leakage followed by reinstallation of the engine under cover on the right side.