Power Steering Vane Pump: Disassembly

NOTE: When using a vise, do not overtighten it.

Measure PS vane pump rotating torque .
1. Check that the pump rotates smoothly without abnormal noise.
2. Using a torque wrench, check the pump rotating torque.
  1. Rotating torque: 0.27 N.m (2.8 kgf. cm, 2.4 in. lbf) or less
Remove suction port union .
1. Remove the bolt and suction port union.
2. Remove the O-ring from the suction port union.
Remove pressure port union, flow control valve and spring .
1. Remove the pressure port union, flow control valve and spring.
2. Remove the O-ring from the pressure port union.
Remove oil pressure switch .
NOTE: Be careful not to drop the oil pressure switch.

If the oil pressure switch is dropped or strongly damaged, replace it with a new one.
Remove rear housing .
1. Remove the 4 bolts and rear housing.
2. Remove the O-ring from the rear housing.
Remove cam ring, 10 vane plates, vane pump rotor and side plate .
1. Remove the cam ring and 10 vane plates.
  NOTE: Take care not to drop the vane plate.
2. Using a screwdriver, remove the snap ring, vane pump rotor and side plate.
3. Remove the 2 O-rings from the side plate.
Remove vane pump shaft with vane pump pulley .