Power Steering Pump: Reassembly

1. Coat all sliding surfaces with ATF. Assemble front plate and rotor assembly on pump shaft. Ensure rotor is installed properly. See Fig 1 . Coat shaft seal with grease. Install longer pin into housing. Align pin and hole in front plate.
   Fig 1: Installing Power Steering Pump Rotor

   Courtesy of GENERAL MOTORS CORP.
2. Using a plastic hammer, tap pump shaft into housing. Install cam ring, with inscribed mark facing toward rear of pump. Install vane plates, with rounded end facing rear of pump. Install rear side plate and "O" ring. Install wave washer, "O" ring and rear housing.
3. Using a torque wrench, measure pump shaft rotating preload. If preload exceeds 2.4 INCH lbs. (.3 N.m), disassemble pump and check assembly. If preload is okay, install spring seat. Bolt hole should be facing outward.
4. Install snap ring. Install spring and flow control valve. Tighten pressure port fitting to 34 ft. lbs. (46 N.m). Install return port and tighten to 108 INCH lbs. (12 N.m). Install pulley.

Wash all parts in solvent. Blow dry with compressed air. Lubricate oil seal lips before reassembly. Ensure punch mark on rotor faces toward rear body cover. Reverse disassembly procedure to complete assembly.