OEM 2002 Toyota Echo Power Steering Pump

2002 Toyota Echo Power Steering Pump Parts Q&A

• Q: How to service and repair the power steering pump on 2002 Toyota Echo?

  A: Start the repair and servicing process of the power steering pump through PS vane pump rotating torque measurement which should produce smooth rotation without abnormal noise at a maximum torque level of 0.27 Nm (2.8 kgf-cm, 2.4 inch lbs). First remove the oil reservoir which requires the O-ring and all three bolts to be taken out before carrying out the heat insulator and rear stay removal. Follow the next step of disconnecting the pressure port union by removing the flow control valve and spring together with its O-ring while also removing the front and rear brackets by disassembling two bolts. The procedure involves removing first the oil pressure sensor with O-ring and then the rear housing together with O-ring. To remove the cam ring and 10 vane plates alongside the vane pump rotor and side plate from the system maintain steady actions because dropping vane plates could cause damages. Also remove the two O-rings present on the side plate. Begin extraction of the vane pump shaft with its attached vane pump pulley unit. The inspection of the vane pump shaft and bushing oil clearance requires using a micrometer and caliper gauge to verify standard clearance between 0.021 - 0.043 mm (0.0008 - 0.0017 inch) with maximum clearance limited to 0.07 mm (0.0028 inch). Front housing and vane pump shaft replacement is required if necessary. The vane pump rotor and vane plates require evaluation for height, thickness and length measurements which should exceed 7.6 mm (0.299 inch), 1.405 mm (0.0553 inch) and 11.993 mm (0.4722 inch) minimums. Check the gap between the vane pump rotor groove and vane plate persists under 0.03 mm (0.0012 inch) and replace components as required per inscribed marks. Check the flow control valve by applying power steering fluid to it while testing its drop into the valve hole and performing the compressed air leakage test; follow with a correct size valve replacement based on inscribed mark measurements. Vernier calipers measure the free spring length which must be at least 35.8 mm (1.409 inch) before replacing if specifications are not met. Refit the oil seal only by utilizing a screwdriver with vinyl tape protection and power steering fluid application to the new seal lip followed by installation using Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (09951-07100) for proper seal placement. Apply power steering fluid to marked components before you install the vane pump shaft with pulley followed by side plate which you should fit with two new O-rings using correct dent alignment. The cam ring must receive installation first with the marked side facing the exterior before inserting both vane pump parts in sequence along with their new snap ring. Use the 10 vane plates by facing their round ends outward before attaching the rear housing through a new O-ring while correctly aligning the straight pin and fastening with 4 bolts at 22 Nm (220 kgf-cm, 16 ft. lbs.). You should install the oil pressure sensor with a new O-ring at 21 Nm (210 kgf-cm, 15 ft. lbs.) before adding the spring and flow control valve and pressure port union while ensuring proper union orientation and tightening it to 69 Nm (700 kgf-cm, 51 ft. lbs.). Complete the attachment of front and rear brackets to each other using two bolts at 44 Nm (440 kgf-cm, 32 ft. lbs.) and align the heat insulator and rear stay through a single bolt tightened to the same torque value. One should finalize the installation by applying power steering fluid to a fresh O-ring before placing it in the oil reservoir where it should be secured with 3 bolts at 9.0 Nm (90 kgf-cm, 78 inch lbs.). Report the PS vane pump rotating torque results again.