OEM Toyota MR2 Spyder Power Steering Pump

Toyota MR2 Spyder Power Steering Pump Parts and Q&A

• Power Steering Pump
  44310-17060
  Q: How to service and repair the power steering pump on Toyota MR2 Spyder?

  A:

  The power steering pump service requires removing the cap then opening the reservoir with clamp loosening and removing it before extracting the O-ring from the power steering vane pump housing. Follow by removing the rear housing together with the oil strainer by detaching its four bolts and removing the O-ring from the housing. The service starts with cam ring removal and then vane pump rotor and 10 vane plates until the vane plates stay safe from falling to the ground then removes the lower side plate. The procedure for removing the flow control valve spring seat requires the snap ring pliers to detach the snap ring followed by pulling the service bolt to extract the O-ring from the spring seat before separating the flow control valve and spring. To remove the upper side plate a plastic-faced hammer must tap it out of place while you also remove the O-ring. Inspect the vane pump rotor and vane plates using a micrometer for height, thickness, and length, ensuring they meet the minimum specifications: height 5.4 mm, thickness 0.882 mm, and length 4.596 mm. Measure the clearance between the vane pump rotor groove and vane plate with a feeler gauge, ensuring it does not exceed 0.023 mm. Check the flow control valve by coating it with power steering fluid and confirming it falls smoothly into the valve hole, and test for leakage by applying compressed air. Check the natural length of the spring using vernier calipers because it must be longer than 28.7 mm. The process of union seat removal from the power steering vane pump housing requires a screw extractor and subsequent gentle tapping of a new piece into position. The assembly process requires power steering fluid coating of specified parts before installing the flow control valve alongside the spring seat according to direction marked on each component. A new O-ring must also receive the fluid coating. To perform reinstallation position all components including lower side plate, cam ring, vane pump rotor and 10 vane plates in their correct orientation. Secure the upper side plate that contains a new O-ring together with a wave washer and oil strainer and rear housing while aligning the O-ring to the oil hole before tightening all 4 bolts to 8.5 Nm torque. To complete the installation the reservoir receives a new O-ring which you must fasten at 7.0 Nm torque before setting the reservoir cap.