Power Steering Pump: Reassembly
- Lubricate NEW shaft seal with power steering fluid. Drive seal into housing using suitable socket. Install thrust plate, rotor and retaining ring onto shaft to form shaft assembly. See Figure. Install shaft assembly into housing.
NOTE:
Pump will not operate if pump ring is installed with indentation on pump ring facing downward. See Fig 1.
- Install dowel pins through thrust plate into housing. Install pump ring into housing, ensuring indentation on pump ring is facing upward, as illustrated. See Fig 1. Install vanes into pump rotor (vanes can be installed in either direction).
- Install NEW lubricated pump housing "O" ring into housing groove. Align holes in pressure plate with dowel pins, and then install pressure plate. Position pressure plate spring against pressure plate (spring can be installed in either direction).
- Install NEW lubricated "O" ring onto end cover. Lubricate outer edge of end cover. Press end cover into housing far enough to install retaining ring. Ensure retaining ring is fully seated in groove. Install "O" rings in correct order onto EVO actuator.
- Install discharge fitting onto EVO actuator until fully seated. Install flow control valve and spring into pump housing. Install discharge fitting and EVO actuator. Tighten EVO actuator to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article.
- Ensure EVO actuator electrical connector faces back of pump, and is aligned with shaft. Install electrical connector locating clip. Install bracket onto pump. Install pump pulley using Pulley Remover/Installer (SA9162C).
- Install NEW lubricated reservoir "O" ring onto reservoir. Push reservoir straight into pump housing. Install reservoir retaining clips. Install pump. Fill and bleed hydraulic system. See HYDRAULIC SYSTEM BLEEDING under LUBRICATION.
Courtesy of GENERAL MOTORS CORP.