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Power Steering Pump: Reassembly

  1. Coat with power steering fluid. See Figure.
    2. CAUTION: Be careful not to damage the oil seal lip.
    Fig 1: Installing Vane Pump Shaft With Bearing
    G00122290Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Using a 29-mm socket wrench, press in the shaft with the bearing to the front housing. See Fig 1. Using snap ring pliers, install a new snap ring to the front housing.
    3. NOTE: Be careful not to damage the pin.
  3. Install longer straight pin. Install a new pin to the front housing.
    4. NOTE: Make sure you install the plate facing the correct direction. See Figure.
  4. Install side front plate. Coat 2 new "O" rings with power steering fluid, and install them to the plate. Align the hole of the plate and longer straight pin.
    5. CAUTION: Be careful not to damage the pin.
  5. Install shorter straight pin. Install a new pin to the side front plate.
  6. Install cam ring and vane pump rotor. Install the ring and rotor with the inscribed marks facing outward. See Fig 2.
    Fig 2: Installing Cam Ring & Vane Pump Rotor
    G00122291Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Install vane plates. Install the 10 plates with the round end facing outward. See Fig 3.
    Fig 3: Installing Vane Plates
    G00122292Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. Coat a new "O" ring with power steering fluid and install it to the side rear plate. Align the holes of the plate with the straight pins.
  9. Install wave washer. See Fig 4. Install the washer so that its protrusions fit into the slots in the side rear plate.
    Fig 4: Installing Wave Washer
    G00122293Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. Install rear housing.Coat a new "O" ring with power steering fluid and install it to the housing. Using a press, apply just enough pressure to compress the wave washer, and install a new snap ring to the front housing. See Fig 5.
    Fig 5: Installing Rear Housing
    G00122294Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. Install spring, flow control valve and pressure port union.Install the valve facing the correct direction. See Figure. Coat a new "O" ring with power steering fluid and install it to the union. Tighten union to 51 ft. lbs. (69 N.m).
    12. CAUTION: Be careful not to damage the gear.
  12. Install vane pump drive gear. Install the Woodruff key and gear. Using soft jaws on a vise, clamp the gear in the vise. Torque the gear set nut. Tighten to 54 ft. lbs. (74 N.m).
  13. Measure power steering pump rotating torque.
  14. Install suction port union. Coat a new "O" ring with power steering fluid and install it to the union. Torque the bolt to 9 ft. lbs. (13 N.m).
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