Inspection

INSPECTION





1. Measure oil clearance between vane pump shaft and bushing. Using a micrometer and caliper gauge, measure the oil clearance.
Clearance:
Standard: 0.03 - 0.05 mm (0.0012 - 0.0020 inch).
Maximum: 0.07 mm (0.0028 inch).
If it is more than maximum, replace the front housing and vane pump shaft.
2. Inspect vane pump rotor and the vane plates, as follows:





a. Using a micrometer, measure the height, thickness and length of the ten vane plates.
Minimum:
Height: 8.6 mm (0.339 inch).
Thickness: 1.40 mm (0.0551 inch).
Length: 14.99 mm (0.59021 inch).





b. Using a feeler gauge, measure the clearance between the rotor groove and vane plate. If it is more than maximum, replace the vane plate and/or rotor with one having the same mark stamped on the cam ring.
Maximum clearance: 0.04 mm (0.0016 inch).





c. The inscribed marks are 1, 2, 3, 4 or None.





NOTE: There are five vane plate lengths with the following rotor and cam ring marks:

3. Inspect flow control valve, as follows:





a. Coat the valve with power steering fluid and check that it falls smoothly into the valve hole by its own weight.





b. Check the valve for leakage. Close one of the holes and apply 392 - 490 kPa (57 - 71 psi) of compressed air into the opposite side, and confirm that air does not come out from the end holes.





If necessary, replace the valve with one having the same letter as inscribed on the front housing.
Inscribed marks: A, B, C, D, E or F.





4. Inspect spring. Using calipers, measure the free length of the spring.
Minimum free length: 33.0 mm (1.299 inch).
If it is not within specification, replace the spring.
5. If necessary, replace oil seal, as follows:





a. Using Special Service Tool (SST) 09631 - 10030 or equivalent, tap out the oil seal from the front housing.

NOTICE: Be careful not to damage the bushing of the front housing.

b. Coat a new oil seal lip with power steering fluid.





c. Using a (24 mm) socket wrench, press in the oil seal.

NOTICE: Make sure to install the oil seal facing the correct direction.





6. If necessary, replace bearing, as follows:
a. Using a press, press out the bearing.
b. Using a snap ring expander, replace the snap ring with new one.

NOTICE: Be careful not to damage the shaft.

c. Coat a new bearing with power steering fluid.
d. Using a press, press in the bearing.