Power Steering Pump: Overhaul: Disassembly
- Drain pump reservoir. Clean exterior of unit. Remove mounting bracket(s). Using a puller, withdraw pulley from shaft. See Fig 1 .
- Clamp pump, with shaft pointing down and at the square boss of the shaft housing, into a soft-jawed vise. Remove pressure line union and "O" ring. Remove reservoir retaining studs.
- Tap against filler tube with plastic hammer to loosen reservoir on pump body. Remove reservoir from body. Remove and discard "O" rings.
- Using 1/8" punch, tap end plate retaining ring around until end of ring is near hole in pump body. Inserting punch in hole, disengage ring from groove in pump bore. Using a screwdriver, pry ring from body. See Fig 2 .
- Tap end plate with a soft-faced hammer to loosen. Spring tension should push plate up. Remove spring. Remove pump from vise.
- Invert pump and place on flat surface. Using soft-faced hammer, tap end of drive shaft to loosen pressure plate, rotor, and thrust plate assembly from body.
- Lift pump body off rotor assembly. Flow control valve and spring should slide out of bore. Remove and discard end plate and pressure plate "O" rings.
- Using a screwdriver, pry drive shaft oil seal from body. Lift pressure plate and cam ring from rotor. Remove rotor vanes.
- Clamp drive shaft in soft-jawed vise, with rotor and thrust plate facing up. Remove rotor lock ring from shaft. Use care not to nick shaft or rotor. Slide rotor and thrust plate off shaft. Remove shaft from vise.