Inspection

INSPECTION





1. Measure oil clearance between vane pump shaft and bushing. Using a micrometer and caliper gauge, measure the oil clearance.
Oil clearance:
Standard: 0.01 - 0.03 mm (0.0004 - 0.00012 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 vane plates, as follows:





a. Using a micrometer, measure the height, thickness and length of the 10 vane plates.
Minimum:
Height: 8.0 mm (0.315 inch).
Thickness: 1.77 mm (0.0697 inch).
Length: 14.97 mm (0.5894 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: 0.03 mm (0.0012 inch).





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.





c. 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: 36.9 mm (1.453 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 front housing.





b. Coat a new oil seal lip with power steering fluid.
c. Using a (22 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 snap ring expander, remove the snap ring from the vane pump shaft.

NOTICE: Be careful not to damage the shaft.





b. Using a press, press out the bearing.
c. Coat a new bearing with power steering fluid.





d. Using a press, press in the bearing.
e. Using a snap ring expander, install a new snap ring.

NOTICE: Be careful not to damage the shaft.