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Power Steering Pump: Reassembly

  1. Lubricate "O" rings and all internal pump components with ATF Dexron II fluid before reassembly. Install new pump shaft seal in pump housing. Install new pressure plate "O" ring to 3rd groove from end of pump housing. Insert both dowel pins into pump housing.
  2. Install thrust plate and rotor to pump shaft. Install new snap ring to pump shaft. Make sure rotor is installed with countersunk side toward thrust plate.
  3. Install pump shaft into pump housing, making sure thrust plate slides over dowel pins properly. Install pump ring into pump housing, over dowel pins and with arrow on ring toward rear of pump housing.
  4. Install vanes in rotor and make sure rounded edge of vanes face outward. Install pressure plate into pump housing and over dowel pins. Seat plate by depressing about .06" (1.6 mm) over "O" ring. Make sure circular depression (for spring) is toward rear of housing.
  5. Install new "O" ring in 2nd groove from rear of pump housing. Place end plate spring in pressure plate groove. Press end plate into pump housing. Depress end plate just enough to install retaining ring. Make sure retaining ring seats properly. Press pulley bracket onto shaft.


  1. Lubricate "O" rings and all internal pump components with ATF Dexron II before reassembly. Install flow control valve spring and control valve in pump body. Install and tighten pressure connector. Depress control valve to check for smooth operation. Apply grease to lip of oil seal and press into pump body.
  2. Install side plate with chamfered edge toward rotor, rotor with chamfered inner bore toward pump cover, and collar with chamfered edge toward rotor on pump shaft. Tighten pulley nut temporarily. Hold snap ring on shaft with snap ring pliers.
  3. Install "O" ring and side plate spring to pump body. Install vanes with rounded edges outward onto rotor. Insert shaft assembly with vanes to pump body. Do not damage pump shaft seal lip.
  4. Install cam ring with chamfered edge toward side plate. Install reservoir (Challenger and Sapporo) and cover. Install and tighten suction plate.
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