OEM 2003 Toyota Land Cruiser Power Steering Pump

2003 Toyota Land Cruiser Parts Questions & Experts Answers

• Q: How to service and repair the power steering pump on 2003 Toyota Land Cruiser?

  A: Begin power steering pump service and repair operations by fixing the vane pump assembly to a vise clamp using Special Service Tool: 09630-00014 (09631-00132). Measure the rotating torque with a torque wrench through the shaft bolt during inspection while checking that the pump moves without making strange sounds or noise. The torque reading should be below 2.4 inch lbs, 2.8 kgf-cm and 0.3 Nm. Start by removing three parts from the suction port union at its bolt and O-ring then proceed to remove parts from the pressure port union plus flow control valve and spring. The vane pump assembly can be removed along with its gasket after detaching the rear housing by relieving tension from the 4 bolts. Extract the snap ring from the vane pump shaft to reach the cam ring and 10 vane plates together with the vane pump rotor while ensuring none of the components fall unintentionally. Use a micrometer and caliper gauge to check the vane pump shaft clearance with bushings of both front and rear housings until it reaches standard 0.020 - 0.077 mm (0.00079 - 0.00303 inch) tolerances or maximum 0.070 mm (0.00276 inch) and 0.080 mm (0.00315 inch) measurements; replace vane pump assembly when these limits are exceeded. The 10 vane plates need their height, thickness and length checked to have a minimum thickness of 1.405 mm (0.05531 inch) using a measurement tool. A feeler gauge must confirm that the clearance between rotor groove and plate remains below 0.03 mm (0.0012 inch). The flow control valve should be checked by power steering fluid treatment then smooth entry into the valve hole followed by compressed air pressure verification that the valve end holes do not leak at 392 - 490 kPa (4 - 5 kgf/cm2, 57 - 71 psi). It is necessary to replace the vane pump assembly when the free spring length measures less than 31.3 mm (1.2323 inch). The oil seal replacement process involves these steps: Firstly remove it with a screwdriver that has vinyl tape wrapping while coating the new oil seal lip with power steering fluid before using Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (0951-07100) to properly orient the seal and insert it. Power steering fluid should coat all components before inserting the vane pump shaft along with new O-rings sealed within the side plate. Implement the cam ring first with its identification mark on the outside before adding the rotor and finally the snap ring. Temporary installation of the four bolts should be performed before coating the new gasket in power steering fluid and torqueing them to 22 Nm (225 kgf-cm, 16 ft. lbs.). Start by installing the spring along with a flow control valve and pressure port union before correctly positioning the valve and coating a new O-ring with power steering fluid while torquing the union to 69 Nm (700 kgf-cm, 51 ft. lbs.). Conclusion of the installation requires connecting the suction port union with a new O-ring that received power steering fluid application before torquing the bolt to 12 Nm (120 kgf-cm, 9 ft. lbs.). Follow by measuring the PS vane pump rotating torque.