Toyota 44310-35660
Power Steering Pump

The power steering pump service requires draining the power steering fluid first. Release the tension on the belt tensioner counterclockwise to take out the air cleaner assembly and vane pump V belt. unning the pump requires the operator to release two clips and disconnect two vacuum hoses before releasing a third clip and disconnection of the hose from the oil reservoir to pump hose No. 1. The next procedure requires removal of the union bolt along with gasket for pressure feed tube assembly separation and tube disconnection. The vane pump assembly removal requires the user to remove its two bolts and nut before using a "torx" socket (E10) to loosen the stud bolt.

Service or repair of the power steering pump starts by disconnecting the negative battery cable followed by the removal of No. 1 engine under cover along with the fan and generator V belt. Perform power steering fluid drainage then remove the No. 1 oil reservoir to pump hose connection by unclipping the retaining mechanism. The pressure feed tube assembly requires union bolt and gasket removal to disconnect it. Start the removal process of the vane pump by disconnecting the oil pressure switch connector then removing the bolt as well as wire harness clamp bracket before removing the two bolts that secure the vane pump assembly. The vane pump assembly goes into a vise using Special Service Tool: 09630-00014 (09631-00132) but avoid extreme tightening of the tool. First, use a combination of bolt and O-ring removal to disconnect the power steering suction port union and then proceed to detach the flow control valve and compression spring by removing the pressure port union with its corresponding O-ring. Quantitative removal starts with the vane pump rear housing four bolts and O-ring then continues with the pulley shaft sub-assembly snap ring removal through screwdriver action and finish with the front side plate O-rings and the vane pump cam ring and plates. A micrometer along with a caliper gauge should be used to check the oil clearance after measuring the vane pump rotor and plates for standard compliance values. Check the functionality of the flow control valve and measure the open length of the compression spring. The vane pump assembly requires complete replacement when any damaged components detect outside standard specifications. You should apply power steering fluid to the noted parts before inserting the pulley shaft sub-assembly through Special Service Tools 09950-60010 (09951-00280) and 09950-70010 (09951-07100) and a press to avoid damaging the oil seal lip. Position the cam ring along with the front side plate after which you should place the vane pump rotor and plates correctly. You should use a new O-ring while installing the rear housing keeping the straight pin in view during the installation process then torque the housing up to 22 N m (224 kgf cm, 16 ft. lbf). Verify the pump preload intensity by allowing a steady movement of the parts while utilizing a recommended special bolt to measure torque values. Secure the power steering oil pressure switch along with the flow control valve and suction port union by using the specified torque values. Proceed with installing the vane pump assembly while reconnecting the pressure feed tube and the No. 1 oil reservoir to pump hose and fan and generator V belt and negative battery terminal. Finish with adding power steering fluid along with bleaching the system before leak inspection and No. 1 engine under cover sub-assembly reinstallation.

Loosen the clips and remove the vacuum hoses.

Use Special Service Tool: 09630-00014 (09631-00132) to fix the vane pump assembly in a vise.

Remove the 4 bolts; if the wave washer and side plate are stuck, lightly tap the housing with a plastic hammer to dislodge them, and then remove the 2 O-rings from the rear housing.

The maximum rotating torque is 0.28 Nm (2.8 kgf-cm, 2.4 inch lbs.).

Coat it with power steering fluid and ensure it falls smoothly into the hole, checking for leakage with compressed air.

Take out the bolts and nut, and use a torx socket (E10) to remove the stud bolt.

Add power steering fluid and bleed the power steering fluid.

Use a screwdriver to remove the snap ring and then take out the pulley shaft, being cautious not to damage it.

Secure the vane pump assembly using 2 bolts with a torque of 43 Nm (438 kgf-cm, 32 ft-lbf).