OEM 2006 Toyota Highlander Power Steering Pump

2006 Toyota Highlander Parts Questions & Experts Answers

• Q: How to service and repair the power steering pump on 2006 Toyota Highlander?

  A: The power steering pump service starts with front wheel removal from the right side followed by power steering fluid drain and removal of the front fender apron seal from the right side. Remove the fan and generator V belt through use of Special Service Tool: 09249-63010 before disconnecting oil reservoir to pump hose No. 1 using its clip while being cautious about liquid spillage onto the belt. The pressure feed tube assembly will be disconnected through port union holding with a 27 mm wrench while you remove its union bolt and gasket. The vane pump assembly removal requires disconnecting the engine oil pressure switch connector followed by a bolt A extraction with Special Service Tool: 09249-63010 and a 14 mm deep socket wrench and finishing with bolt B removal. Begin disassembly by fixing the vane pump assembly into a vise using Special Service Tool: 09630-00014 (09631-00132) before you remove the power steering suction port union and O-ring followed by the flow control valve accompanied by its O-ring and compression spring. The vane pump assembler needs to remove the oil pressure switch by disassembling the following steps: four bolts from the vane pump housing rear with an O-ring and two screwdrivers to remove the snap ring from the w/pulley shaft sub-assembly and the ten vane pump plates and the vane pump rotor and vane pump cam ring and the front side plate with its O-rings. Dismantle the housing oil seal with care to prevent any damage to the front module assembly housing. A 0.07 mm (0.0028 inch) oil clearance limit exists for the vane pump shaft while the vane pump rotor thickness should fall between 1.405 to 1.411 mm (0.05531 to 0.05555 inch). Check the distance between the vane pump rotor groove and the vane plates because it should not be more than 0.03 mm (0.0012 inch). Check the flow control valve has normal functioning along with leakage while measuring the compression spring length. The free length should measure at least 30.3 mm (1.193 inch). All damaged or non-specification components in the vane pump assembly require immediate replacement. Reassemble the vane pump by using the combination of Special Service Tools 09950-60010 (09951-00280) and 09950-70010 (09951-07100) with a press to install a new housing oil seal that should be coated with power steering fluid. Maintaining proper orientation during installation is necessary. After ensuring safety of the oil seal lip install the w/pulley shaft sub-assembly followed by installing the front side plate with newly installed O-rings while paying attention to component positioning. Fit the cam ring so its inscribed mark points up before adding the vane pump rotor and plates while keeping the round ends facing toward the outside. Install a new O-ring on the housing rear and attach the components to their proper positions before tightening them to 22 Nm (224 kgf-cm or 16 ft. lbs.). Before installation check the pump for normal rotation while you install the oil pressure switch with a new O-ring and fasten it to 21 Nm (214 kgf-cm, 15 ft. lbs.). Start by installing the flow control valve followed by a compression spring. Then add the pressure port union with new O-ring, use a torque of 69 Nm (704 kgf-cm, 51 ft. lbs.), then finish by installing the suction port union with new O-ring while tightening to 12 Nm (122 kgf-cm, 9 ft. lbs.). Professionals should first loosely fasten bolt A onto the vane pump assembly while performing installation steps which finalize in tightening bolt B to 37 Nm (377 kgf-cm, 27 ft. lbs.) and bolt A to 26 Nm (264 kgf-cm, 19 ft. lbs.) through use of Special Service Tool: 09249-63010. The pressure feed tube assembly requires a new gasket for installation before its union bolt reaches a torque of 52 Nm (525 kgf-cm, 38 ft. lbs.) when properly connected to the housing front. The operator should return the oil reservoir to pump hose No. 1 followed by installing the fan and generator V belt using Special Service Tool: 09249-63010 and replacing the front fender apron seal RH and the front wheel RH which should be torqued to 103 Nm (1,050 kgf-cm, 76 ft. lbs.). Terminate the power steering fluid bleeding before conducting leak inspections on the system.