OEM 2005 Toyota Celica Power Steering Pump

2005 Toyota Celica Power Steering Pump Parts Q&A

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

  A: The first step for power steering pump service and repair consists of measuring PS vane pump rotating torque until it displays smooth operation without unusual noises but never exceeding maximum torque of 0.27 Nm (2.8 kgf-cm, 2.4 inch lbs.). The first step is to disassemble the suction port union by removing its bolt with O-ring while proceeding to remove the pressure port union and flow control valve with spring and O-ring from the pressure port union. Begin removing the rear housing by first detaching the four bolts and rear bracket and oil pressure switch then collecting the oil pressure switch if it falls or suffers damages before continuing the process. The maintenance process begins by removing the cam ring before taking out the 10 vane plates along with the vane pump rotor and side plate. Keep the vane plates from dropping during this operation followed by using a screwdriver to remove the snap ring then finish by taking out the two O-rings from the side plate. Remove the vane pump shaft as a unit with the attached vane pump pulley. To inspect the vane pump shaft oil clearance you must use a micrometer and caliper gauge to check between the bushing and vane pump shaft while ensuring the standard range stays at 0.021 - 0.043 mm (0.0008 - 0.0017 inch) and maximum allows only 0.07 mm (0.0028 inch); you should replace the front housing and vane pump shaft if necessary. The vane pump rotor and vane plates need inspection for their height and thickness and length measurements which must meet or exceed 7.6 mm (0.299 inch) and 1.405 mm (0.0553 inch) and 11.993 mm (0.4722 inch) respectively. Use a feeler gauge to check the vane plate and vane pump rotor groove clearance which should be no more than 0.03 mm (0.0012 inch); replace any parts if necessary, while keeping the cam ring inscribed mark as the reference. Test the flow control valve through its power steering fluid coating while observing its smooth insertion into the valve hole and apply compressed air to check for leaks from the end hole; replace the valve if needed with one matching inscribed marks (A, B, C, D, E, or F). Use vernier calipers to measure the spring free length which must be at least 1.409 inches (35.8 mm) and obtain a replacement if the length is insufficient. The proper replacement process starts with oil seal removal by using a screwdriver covered in vinyl tape along with power steering fluid coating on the new oil seal lip and the addition of Special Service Tools like 09950-60010 (09951-00280) and 09950-70010 (09951-07100) which allow correct oil seal installation. The procedure for reassembly includes coating the parts with power steering fluid based on the arrow directions followed by placing the vane pump shaft and vane pump pulley together with installing the side plate that contains two new O-rings treated with power steering fluid while ensuring the dent fits properly with the front housing. Start by placing the cam ring with its inscribed mark visible on the outside surface before adding the vane pump rotor which must have the inscribed mark positioned outward and finally install a new snap ring. Fasten the 10 vane plates with round ends facing outwards and install the rear housing with fresh O-ring coated by power steering fluid while aligning the straight pin to the dents before tightening four bolts to 22 Nm at 220 kgf-cm (16 ft. lbs.) followed by securing the rear bracket to 43 Nm at 440 kgf-cm (32 ft lbs.). Fasten the oil pressure switch by applying 21 Nm torque (210 kgf-cm) before adding the spring followed by the flow control valve which needs to face the right direction and completing the installation by screwing the pressure port union with a new O-ring coated in power steering fluid while tightening to 69 Nm (700 kgf-cm). The last step involves installing the suction port union with the coated O-ring secured with its bolt at 12 Nm (120 kgf-cm, 9 ft. lbs.). The procedure ends with another PS vane pump rotating torque measurement.