OEM 2000 Toyota Echo Power Steering Pump

2000 Toyota Echo Power Steering Pump Parts Q&A

• Q: How to service and repair the Power Steering Pump on 2000 Toyota Echo?

  A: The PS vane pump should have its rotating torque measured before service to ensure a quiet operation while maintaining a maximum limit of 0.27 Nm (2.8 kgf.cm, 2.4 ft. lbs). Start service by first extracting the oil reservoir through bolt removal along with the 0-ring and moving to heat insulator removal and then the rear stay. The service process begins with front and rear bracket bolt removal before continuing to remove the pressure port union together with its flow control valve, spring and 0-ring from the pressure port union. First disconnect the oil pressure sensor with its rubber 0-ring as well as the rear housing and replacement of its 0-ring. Proceed by removing the cam ring and 10 vane plates and vane pump rotor and side plate while protecting the vane plates from falling to earth and take out the 2 0-rings from the side plate. Use a micrometer and caliper gauge to inspect the vane pump shaft to bushing oil clearance and ensure 0.021 to 0.043 mm (0.0008 to 0.0017 inch) standard clearance and maximum 0.07 mm (0.0028 inch) clearance; replace the front housing and vane pump shaft if these specifications are not met. Use the tools to measure the 10 vane plates for height (minimum 7.6 mm 0.299 inch) and thickness (minimum 1.406 mm 0.0553 inch) and length (minimum 11.993 mm 0.4722 inch). Measure the vane plate to vane pump rotor groove clearance and replace either component if the measurement exceeds 0.03 mm (0.0012 inch). The inspection should match the inscribed mark on the cam ring. To inspect the flow control valve apply power steering fluid and measure its proper insertion into the valve hole while checking for leakage under compressed air pressure of 392 - 490 kPa (4 - 5 kgf/cm2, 57 - 71 psi) then replace if necessary with a valve matching the inscribed mark on the front housing. Use vernier calipers to measure the free spring length as minimum 35.8 mm (1.409 inch) or replace the spring. You can replace the oil seal by removing it carefully with a screwdriver shielded by vinyl tape and by treating the new oil seal lip with power steering fluid before using Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (09951-07100) to press it in with proper orientation. First coat all specified parts with power steering fluid as indicated by arrows then put in the vane pump shaft with the vane pump pulley before inserting the side plate containing new 0-rings that also received power steering fluid treatment while ensuring the dent enters the front housing correctly. The cam ring installation starts with placing the marked side outwards before adding the vane pump rotor and new snap ring. Begin assembly by inserting the 10 vane plates with round ends toward exterior space, then mount the rear housing with fresh power steering fluid-coated 0-ring while lining up the straight pin against housing dents then tighten four bolts to 22 Nm (220 kgf.cm, 16 ft. lbs.). The installation process requires the oil pressure sensor to have a new 0-ring coated with power steering fluid which receives a torque of 21 Nm (210 kgf.cm, 15 ft.lbs.) before adding the spring, flow control valve and pressure port union. Secure the components with the flow control valve oriented correctly while using a new 0-ring that requires 69 Nm (700 kgf.cm, 51 ft.lbs.) torque. Secure the front and rear brackets with 2 bolts that must be torqued to 44 Nm (440 kgf.cm, 32 ft. lbs.). Then install a bolt to secure the heat insulator and rear stay at the same torque for correct heat insulation. Finish by mounting the oil reservoir with new 0-ring coated in power steering fluid using 3 bolts torqued to 9.0 Nm (90 kgf.cm, 78 inch lbs). Take the final measurement for PS vane pump rotating torque.