GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Tracker - 4WD 🢒 Steering 🢒 Power Steering System 🢒 Power Steering Pump Disassemble
  1. Remove the power steering pump from the vehicle. Refer to Power Steering Pump Replacement .
  2. Clean the pump exterior thoroughly.
  3. Mount the pump in a table vise.

    4. Object Number: 463005 Size: SH
  4. Remove the following components from the pump body:
    5. • The power steering gear outlet hose connector bolt
    • The power steering gear outlet hose connector (1)
    • The O-ring

    Object Number: 462974 Size: SH
  5. Remove the pressure switch (1) from the pump body.
  6. Remove the flow control valve from the pump body.

    7. Object Number: 462670 Size: SH
  7. Remove the 4 bolts (1,2,3,4) from the pump in order to remove the rear pump cover and the O-ring seal from the pump body.

    8. Object Number: 462544 Size: SH
  8. Remove the cam ring (1) from the pump shaft.

    9. Important: During disassembly, ensure that the vanes are kept together and identified so that they can be reinstalled in the original locations.

  9. Remove the vanes from the rotor.

    10. Object Number: 462532 Size: SH
  10. Remove the following components from the pump body:
    11. • The snap ring (3)
    • The rotor (2)
    • The side plate
    • The O-rings
  11. Remove the shaft with the pulley attached from the pump body.
  12. Remove the oil seal from the pump body.

Inspection Procedure

    Object Number: 462275 Size: SH
  1. Inspect the power steering pump body and the cover for cracks or leaks.
  2. If any of the following conditions are present on the pump body or any internal part, replace the power steering pump. Refer to Power Steering Pump Replacement .
    3. • Excessive wear
    • Cracks
    • Leaks

    Object Number: 462261 Size: SH
  3. Inspect the side plate and the shaft for excessive wear and damage. If any defect is found, replace the pump assembly. Refer to Power Steering Pump Replacement .

    4. Object Number: 462268 Size: SH
  4. Inspect the cam ring for excessive wear and damage. If any defect is found, replace the pump assembly. Refer to Power Steering Pump Replacement .

    5. Object Number: 462289 Size: SH
  5. Inspect the sliding surfaces of the rotor and the vane for wear and damage. If wear or damage is present, replace the rotor and the vanes with the power steering pump seal kit.

    6. Object Number: 462295 Size: SH
  6. Use a feeler gauge (1) in order to measure the vane-to-rotor clearance.

    7. Measurement
    The allowable vane-to-rotor clearance is 0.015-0.027 mm (0.0006-0.0011 in).

  7. If the vane to rotor clearance is greater than the specified range, replace the rotor and the vanes with the power steering pump seal kit.

    8. Object Number: 462298 Size: SH
  8. Inspect the fluid passage of the relief valve and the orifice of the connector for obstructions.
  9. Inspecting the sliding surface of the relief valve for wear and damage.

    10. Object Number: 462302 Size: SH
  10. Use the dial calipers in order to measure the free length of the flow control valve spring (1).

    11. Measurement
    The free length of the spring should be within 19.0-22.0 mm (0.748-0.866 in).

  11. If the valve spring does not fall within the specifications, replace the power steering pump. Refer to Power Steering Pump Replacement .