OEM 2005 Toyota Echo Power Steering Pump

2005 Toyota Echo Parts Questions & Experts Answers

• Q: How to service and repair the power steering pump on 2005 Toyota Echo?

  A: Starting the PS vane pump servicing process requires first measuring the rotating torque to ensure a smooth operation with no unusual noises and less than 0.27 Nm of maximum torque (2.8 kgf-cm, 2.4 inch lbs.). The first service step requires removal of the oil reservoir through O-ring along with 3 bolts before removing heat insulator and rear stay. Start by disconnecting the front and rear brackets through the removal of 2 bolts and continuing to remove the pressure port union, flow control valve, and spring with their respective O-ring from the pressure port union. First disconnect the oil pressure sensor with its O-ring and then remove the rear housing along with its O-ring. Separate the cam ring along with the 10 vane plates and vane pump rotor and side plate from each other yet avoid dropping the vane plates before taking out the 2 O-rings from the side plate. The vane pump shaft requires inspection with caliper and micrometer tools to measure its bushing oil clearance which must be between 0.021 - 0.043 mm (0.0008 - 0.0017 inch) and its maximum limit is 0.07 mm (0.0028 inch); a replacement of the front housing and vane pump shaft is needed if these measurements fall outside the established range. Check the measurements of 10 vane plates for height being at least 7.6 mm (0.299 inch) and thickness at 1.405 mm (0.0553 inch) and length at 11.993 mm (0.4722 inch). During the inspection process check that the vane plate and vane pump rotor groove clearance stays below 0.03 mm (0.0012 inch) then change either component if needed. Power steering fluid must be applied to the flow control valve before checking its smooth movement into the valve hole for leakage while verifying the end hole's air-tightness with an appropriate replacement valve bearing the same mark A, B, C, D, E, or F. Free spring length should be measured using vernier calipers to ensure at least 35.8 mm (1.409 inch) and replacement if necessary. The technician should remove the oil seal with a screwdriver wrapped in vinyl tape before inserting a new seal with power steering fluid coating its lip while using Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (09951-07100) to press it into position according to the installation direction. After coating all parts with arrow markings in power steering fluid users must install the vane pump shaft together with the vane pump pulley before placing the side plate containing two new O-rings coated in power steering fluid while aligning the dent with the front housing. The vane pump assembly begins with placing the cam ring facing outward while inserting the vane pump rotor and its new snap ring. Use the flat edge on 10 vane plates in their installation before mounting the rear housing with its O-ring treated in power steering fluid and straight pin placed correctly into dents while tightening 4 bolts to 220 kgf-cm (22 Nm, 16 ft. lbs.). The installation includes adding a new O-ring coated in power steering fluid to the oil pressure sensor before torquing it to 21 Nm (210 kgf-cm, 15 ft. lbs.). Then install the spring then flow control valve then pressure port union while ensuring flow control valve orientation and applying power steering fluid to the new O-ring before torquing to 69 Nm (700 kgf-cm, 51 ft. lbs.). Secure the system by first mounting the front and rear brackets through 2 bolts reaching 44 Nm (440 kgf-cm, 32 ft. lbs.) torque and then adding the heat insulator and rear stay through a bolt torqued to 44 Nm (440 kgf-cm, 32 ft. lbs.) before appropriate heat insulator placement and oil reservoir installation with a new O-ring coated in power steering fluid and 3 bolts torqued to 9.0 Nm (90 kgf-cm, 78 inch lbs.). The process ends with a PS vane pump rotating torque measurement.