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Steering Gear: Disassembly

  1. Remove pitman shaft seals. See PITMAN SHAFT SEALS  under REMOVAL & INSTALLATION. Mount steering gear in soft-jawed vise with pitman shaft pointing down.
  2. Remove pitman shaft adjuster lock nut. See Fig 1 . Remove side cover bolts. Rotate stub shaft to center the gear. Remove side cover, gasket and pitman shaft as an assembly. Remove pitman shaft seal (single or double lip seal).
    Fig 1: Exploded View Of Power Steering Gear
    G110170Courtesy of GENERAL MOTORS CORP.
  3. Unseat housing end plug retaining ring by inserting punch into housing access hole. Remove housing end plug and "O" ring seal.
  4. Remove stub shaft adjuster lock nut, using punch against edge of slots. Using Spanner Wrench (J-7624), remove adjuster plug. Pry thrust washer bearing retainer from adjuster plug. Remove bearing spacer, races, thrust bearing, "O" ring and retaining ring.
  5. Place adjuster plug on suitable support with outside face down. Using Adjuster Plug Bearing Remover and Installer (J-6221), drive needle bearing, dust seal and lip seal from adjuster plug.
  6. Remove stub shaft and valve as an assembly. Tap stub shaft lightly on wooden block to loosen shaft cap. Pull cap and valve 1/4" (6 mm) out from body. Disengage stub shaft pin from hole in valve spool. Pull and rotate valve spool to remove it from valve body. Remove valve spool "O" ring, valve body, Teflon rings and "O" ring seals.
    NOTE: DO NOT  disassemble valve body. If valve body is defective, replace entire valve body as an assembly.
  7. Turn stub shaft counterclockwise until rack piston begins to emerge from housing bore. Remove rack piston plug. Insert Rack Piston Arbor (J-21552) into rack piston. Hold arbor firmly against worm shaft while turning stub shaft counterclockwise to force rack piston from housing. Remove rack piston, balls and rack piston arbor.
  8. Remove worm shaft, thrust bearing and races. Remove worm bearing and races. Remove arbor from rack piston. Remove balls, clamp, and ball guide. Remove Teflon ring and "O" ring seal. Using Internal Snap Ring Pliers (J-4245), remove pitman shaft seal retaining ring.
    CAUTION: DO NOT  score housing bore or shaft surfaces when prying out shaft seals and washers.
  9. Pry washer and double lip seal from housing. Pry out washer and single lip seal. Insert Pitman Shaft Bearing Remover and Installer (J-6278) through hole in top of housing. Drive out bearing. Carefully pry check valve from housing.
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