OEM 2005 Toyota Highlander Power Steering Pump

2005 Toyota Highlander Parts Questions & Experts Answers

• Q: How to overhaul the power steering pump on 2005 Toyota Highlander?

  A: The power steering pump overhaul process requires starting with removal of the front wheel right side followed by draining power steering fluid after which both the front fender apron seal RH and fan and generator V belt need removal with Special Service Tool 09249-63010. First disconnect the pump from oil reservoir hose No.1 after removing its clip while taking care not to let fluid drip onto the V belt. Then disconnect the pressure feed tube assembly by using a 27mm wrench to hold the pressure port union while removing the bolt and gasket. Begin by detaching the oil pressure switch connector followed by loosening bolt A with Special Service Tool: 09249-63010 and a 14 mm deep socket wrench before removing bolt B. The vane pump assembly requires fixation in a vise using Special Service Tool: 09630-00014 (09631-00132) to proceed with removal of the power steering suction port union and O-ring as well as the flow control valve and its compression spring. Disassemble the vane pump system by first eliminating the oil pressure switch then removing 4 bolts from the vane pump housing rear, and the O-ring before using two screwdrivers to take out a snap ring that will expose the vane pump shaft sub-assembly, rotor, and plates, cam ring, and front side plate with its O-rings. Avoid damaging the housing oil seal during removal before inspecting the vane pump shaft along with its bush in the housing front for proper oil clearance that should not be greater than 0.07 mm (0.0028 in.). Measures of the vane pump plates need to be between 1.405 to 1.411 mm (0.05531 to 0.05555 in.) while the vane pump rotor groove clearance with plates must not exceed 0.03 mm (0.0012 in.). The flow control valve requires inspection for proper operation and leakage while being checked for smooth insertion into its slot with no leakage observed during air application. Measure the free length of the compression spring to ensure it extends at least 30.3 mm (1.193 in.) while checking for damage on the pressure port union. Fasten the new power steering fluid-coated housing oil seal with Special Service Tool: 09950-60010 (09951-00280), 09950-70010 (09951-07100) accompanied by a press tool for correct orientation. Apply power steering fluid onto the housing front bushing surface before you place the w/pulley shaft sub-assembly in while avoiding damage to the oil seal lip. First position the vane pump housing rear with its O-ring before installing the snap ring. The next steps involve putting in vane pump rotor and plates and the camera ring respectively. Finish by putting in the side plate front. The vane pump housing rear should get installed with a new O-ring and proper alignment must be maintained before torquing to 22 Nm (224 kgf-cm, 16 ft-lbf). Smooth rotation of the pump should be checked before you install the power steering oil pressure switch with its new O-ring while torquing it to 21 Nm (214 kgf-cm, 15 ft-lbf). Install the flow control valve as well as its compression spring after which add the pressure port union with a new O-ring and torque it to 69 Nm (704 kgf-cm, 51 ft-lbf) before installing the power steering suction port union with a new O-ring that requires a torque of 12 Nm (122 kgf-cm, 9 ft-lbf). Finally, install the vane pump assembly, torqueing bolt B to 37 Nm (377 kgf-cm, 27 ft-lbf) and bolt A to 26 Nm (264 kgf-cm, 19 ft-lbf) using Special Service Tool: 09249-63010, reconnect the oil pressure switch connector, install the pressure feed tube assembly with a new gasket, torqueing to 52 Nm (525 kgf-cm, 38 ft-lbf), connect the oil reservoir to pump hose No.1, install the fan and generator V belt, the front fender apron seal RH, and the front wheel RH, torqueing to 103 Nm (1,050 kgf-cm, 76 ft-lbf), then bleed the power steering fluid and inspect for leaks.