Power Steering Pump Disassemble L81

Tools Required

SA9218NE Power Steering Hub Remover

1. Using the SA9218NE or equivalent , remove the hub.



2. Remove the retaining ring.

•	If difficulty is encountered, use a C-clamp, one side on the end cover and the other side on the pump drive shaft, to depress the end cover, easing removal of the retaining ring. Make sure to insert a piece of wood, or other protective material, between the C-clamp and pump drive shaft.

•	Place a punch into the pump housing access hole and remove the retaining ring.




3. Gently push or tap on the drive shaft to assist in removing the end cover.
4. Remove the following internal pump parts, in two groups:

•	Group 1: End cover, O-ring, pressure plate spring, and pressure plate.

•	Group 2: Drive shaft with pump rotor, pump vanes, pump ring, thrust plate, and shaft retaining ring.




5. Remove the following parts from the pump housing:

•	The O-ring seal

•	The dowel pins from the pump housing

•	The drive shaft seal




6. Remove the pressure plate, pressure plate spring, and O-ring from the end cover.



7. Remove the shaft retaining ring from the drive shaft and discard it.
8. Remove the pump rotor, pump vanes, and thrust plate from the drive shaft.
9. Separate the pump rotor, pump vanes, and pump ring.
10. Clean all parts in power steering fluid GM P/N 9985010 and dry.

Important: 

•	Replace any damaged components. Do not attempt to remove the damage with abrasive cleaners.

•	A wavy pattern on the pump ring face will be present with low mileage and should not be mistaken for premature wear.

11. Inspect the pump ring, pump vanes, thrust plate, and drive shaft for scoring, pitting, or chatter marks.

Power Steering Pump Disassemble L61

1. Remove the power steering pump from the vehicle, as previously outlined.
2. Remove the reservoir retaining clips from the reservoir assembly.
3. Remove the reservoir from the housing.
4. Remove the O-ring seal from the pump housing.



5. Remove the retaining ring.

•	If difficulty is encountered, use a C-clamp, one side on the end cover.

•	Place a punch into the pump housing access hole and remove the retaining ring.




6. Gently push or tap on the drive shaft to assist in removing the end cover.
7. Remove the following internal parts in two groups:

•	Group 1: The end cover, the O-ring, the pressure plate spring, the pressure plate.

•	Group 2: The drive shaft with pump rotor, the pump vanes, the pump ring, the thrust plate, and the shaft retaining ring.




8. Remove the following parts from the pump housing:

•	The O-ring seal

•	The dowel pins from the pump housing

•	The drive shaft seal




9. Remove the pressure plate, pressure plate spring, and O-ring from the end cover.



10. Remove the shaft retaining ring from the drive shaft and discard the ring.
11. Remove the pump rotor, pump vanes, pump rings, and thrust plate from the drive shaft.
12. Separate the pump rotor, pump vanes, and pump ring.
13. Clean all parts in power steering fluid GM P/N 995010 and dry.

Important: 

•	Replace any damaged components. Do not attempt to remove damage with abrasive cleaners.

•	A wavy pattern on the pump ring face will be present with low mileage and should not be mistaken for premature wear.

14. Inspect the pump ring, pump vanes, thrust plate, and drive shaft for scoring, pitting, or chatter marks.