VANE PUMP (for 1GR-FE) INSPECTION


  1. INSPECT VANE PUMP SHAFT AND BUSH IN VANE PUMP FRONT HOUSING


    1. A015CSVE04

      Using a micrometer, measure the outer diameter [a] of the vane pump shaft.

    2. Using a vernier caliper, measure the inner diameter [b] of the vane pump front housing bush.

    3. Calculate the oil clearance.

      Oil clearance = Inner diameter of the bush [b] - Outer diameter of the shaft [a]

      Maximum oil clearance
      0.07 mm (0.00276 in.)

      If the oil clearance is more than the maximum, replace the vane pump assembly.

  2. INSPECT VANE PUMP ROTOR AND VANE PUMP PLATE


    1. A0156DGE01

      Using a micrometer, measure the thickness of the vane pump plates.

      Standard thickness
      1.405 to 1.411 mm (0.0553 to 0.0556 in.)

      If the thickness is not as specified, replace the vane pump assembly.

    2. A0159LDE01

      Using a feeler gauge, measure the clearance between the side face of the vane pump rotor groove and the vane pump plate.

      Maximum clearance
      0.03 mm (0.00118 in.)

      If the clearance is more than the maximum, replace the vane pump assembly.

  3. INSPECT FLOW CONTROL VALVE ASSEMBLY


    1. A015BZ9

      Coat the flow control valve with power steering fluid and check that it falls smoothly into the valve hole by its own weight.

      If the control valve does not fall into the hole smoothly, replace the vane pump assembly.

    2. A015BY0

      Check the flow control valve for leakage. Close one of the holes and apply 390 to 490 kPa (4.0 to 5.0 kgf/cm2, 57 to 71 psi) of compressed air into the opposite side hole, and confirm that air does not come out from the end hole.

      If air leaks, replace the vane pump assembly.

  4. INSPECT FLOW CONTROL VALVE COMPRESSION SPRING


    1. A015BEJ

      Using a vernier caliper, measure the free length of the compression spring.

      Minimum free length
      31.3 mm (1.23 in.)

      If the length is less than the minimum, replace the vane pump assembly.

  5. INSPECT PRESSURE PORT UNION


    1. Visually check the pressure port union for fluid leaks.

      If there is a leak, replace the vane pump assembly.

  6. INSPECT TOTAL PRELOAD


    1. Check that the pump rotates smoothly without abnormal noise.

    2. Temporarily install a service bolt.

      Recommended service bolt
      Thread diameter
      10 mm (0.394 in.)
      Thread pitch
      1.25 mm (0.0492 in.)
      Bolt length
      50 mm (1.97 in.)
    3. A01589KE10

      Using a torque wrench, measure the pump rotating torque.

      Standard rotating torque
      0.3 N*m (3 kgf*cm, 2 in.*lbf) or less

      If the rotating torque is not as specified, check the vane pump housing oil seal.