Tundra 4WD V8-4.7L (2UZ-FE) (2003)
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 flow control valve for leakage.
Close one of the holes and apply compressed air 392 - 490 kPa (4 - 5 kgf/cm2, 57 - 71 psi) 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 mark: A, B, C, D, E or F
4. INSPECT SPRING
Using vernier calipers, measure the free length of the spring.
Minimum free length: 33.2 mm (1.307 inch)
If it is not within the specification, replace the spring.
REPLACEMENT
NOTICE: When using a vise, do not overtighten it.
IF NECESSARY, REPLACE OIL SEAL