OEM 2005 Toyota RAV4 Power Steering Pump

2005 Toyota RAV4 Parts Questions & Experts Answers

• Q: How to service and repair the power steering pump on 2005 Toyota RAV4?

  A: A proper power steering pump service begins with rotating torque measurement of the PS vane pump to ensure smooth rotation without abnormal noise at a maximum torque level of 0.27 Nm (2.8 kgf-cm, 2.4 inch lbs.). Start by removing the suction port union bolting out its bolt and O-ring while also disconnecting the pressure port union and flow control valve together with the spring before taking off its pressure port union O-ring. Cherish the oil pressure switch because dropping it is a risk while damaged components need replacement. The next step involves removing the rear housing through unfastening the 4 bolts and removing the O-ring. A screwdriver assists in taking off the snap ring while you remove the cam ring and 10 vane plates and vane pump rotor and side plate. The process requires extraction of the 2 O-rings that are found on the side plate. The operation includes extracting the vane pump shaft while keeping its vane pump pulley attached. Check the vane pump shaft and bushing oil clearance during inspection to verify standard clearance between 0.021 mm to 0.043 mm (0.0008 inch and 0.0017 inch). If the clearance reaches 0.07 mm (0.0028 inch) or more a new front housing and vane pump shaft should be installed. Check the height at 7.6 mm (0.299 inch) and thickness at 1.405 mm (0.0553 inch) and length at 11.993 mm (0.4722 inch) of the vane pump rotor alongside vane plates while verifying that the clearance between vane pump rotor groove and vane plate remains below 0.025 mm (0.0010 inch). The installation process for the flow control valve requires applying power steering fluid before inserting it into the valve hole. Make sure the valve drops easily while inspecting for leaks by applying compressed air at 392 - 490 kPa (4 - 5 kgf/cm2, 57 - 71 psi). Replace the valve if necessary with one marked A, B, C, D, E or F. Check the spring's free length which must exceed 36.9 mm (1.453 inches) before replacing it with a new one. Insert a new oil seal into the opening by using Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (09951-07100) after coating the lip with power steering fluid while ensuring proper installation orientation. Use power steering fluid to coat the parts with arrows then assemble the vane pump shaft next to the vane pump pulley before placing the side plate with two new O-rings that received power steering fluid coating into position correctly against the front housing. Mount the cam ring with its inscribed mark visible from outside while placing the vane pump rotor in position with visible inscribed mark on the outer side. Lock it into place with a new snap ring. The installation of the rear housing begins with 10 vane plates that have their round ends facing outward followed by application of power steering fluid on a new O-ring which gets installed toward the rear housing. Proper alignment of the straight pin occurs between the cam ring and side plate and front housing before using 4 bolts to secure the assembly at 22 Nm (220 kgf-cm, 16 ft. lbs.). Start by torquing the oil pressure switch to 21 Nm (210 kgf-cm, 15 ft. lbs.), then add the spring and flow control valve and pressure port union while orienting the flow control valve correctly along with pre-installation of a new O-ring using power steering fluid before attaching the pressure port union to a torque of 69 Nm (700 kgf-cm, 51 ft. lbs.). Control the suction port union with a new O-ring treated in power steering fluid then apply the bolt to a torque of 12 Nm (120 kgf-cm, 9 ft. lbs.). After installation check the PS vane pump rotating torque measurement again.