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Home >> Subaru >> 2021 >> Outback Base >> Repair and Diagnosis >> Drivelines & Axles >> Axle Shafts, Propeller Shaft & Hubs >> Front Hub Unit Bearing >> Inspection

Front Hub Unit Bearing: Inspection

  1. Check that there is no deformation, cracks or other damages.
  2. Check for excessive rusting.
  3. Check the following items by turning the front tires by hand.
    • Check for smooth rotation.
    • Check for noise.
  4. Check the front hub unit bearing for looseness.
    1. Moving the upper and lower portions of front tire in the vertical direction.
      • Looseness exists → Go to next step.
      • No looseness → Normal.
      G13949980Courtesy of SUBARU OF AMERICA, INC.
    2. Move the upper and lower portions of front tire in the vertical direction with the brake pedal depressed.
      • Looseness exists → Check the ball joint, each bushing, front suspension and axle housing.
      • No looseness → Replace the front hub unit bearing.
  5. To perform a precise inspection, use a magnet stand and dial gauge to check for looseness in the axial direction of the front hub unit bearing.

    Service limit: 

    0.05 mm (0.002 in)

G13949981Courtesy of SUBARU OF AMERICA, INC.