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Home >> Chevrolet >> 2004 >> Optra Base, Standard >> Repair and Diagnosis >> Steering >> Power Steering System >> Repair Instructions >> Valve and Pinion Assembly Disassemble >> Disassembly Procedure
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Disassembly Procedure

    Fig 1: View Of Housing Dust Cover
    GM1290198Courtesy of GENERAL MOTORS CORP.
  1. Remove the rack and pinion steering assembly from the vehicle. Refer to Steering Gear Replacement .
  2. Remove the dust cover from the lower end of the housing.
    3. Fig 2: View Of Stub Shaft
    GM1290209Courtesy of GENERAL MOTORS CORP.
    NOTE: If the stub shaft is not held, damage to the pinion teeth will occur.
  3. While holding the stub shaft, remove the locknut from the pinion.
    4. Fig 3: Identifying Stub Shaft
    GM1290220Courtesy of GENERAL MOTORS CORP.
  4. With the gear centered, mark the location of the stub shaft notch on the housing to aid in properly installing the pinion and valve assembly.
  5. Remove the upper housing retaining ring and using an arbor press, press on the threaded end of the pinion until it is possible to remove the valve and pinion assembly from the housing.
    6. Fig 4: Identifying Stub Shaft Components
    GM1290229Courtesy of GENERAL MOTORS CORP.
  6. Remove the stub shaft dust seal, the stub shaft bearing annulus assembly and the valve and pinion assembly from the housing.
    7. Fig 5: View Of Lower Pinion Valve Seal, Bushing And Dust Cover
    GM1290237Courtesy of GENERAL MOTORS CORP.
  7. Inspect the valve body rings for wear or damage. Replace the valve body rings as needed. Coat the rings with power steering fluid before installation.
  8. Remove the lower pinion valve seal and bushing. Discard the seal.
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