Vane Pump (For 5L-E) Inspection

Using a micrometer, measure the outer diameter of the vane pump shaft.

Using a vernier caliper, measure the inner diameter of the vane pump front housing bush.

Calculate the oil clearance.
Oil clearance = Inner diameter of the bush - Outer diameter of the shaft

Maximum oil clearance:

0.07 mm (0.00276 in.)

Using a micrometer, measure the thickness of the vane pump plates.

Standard thickness:

1.397 to 1.403 mm (0.0550 to 0.0552 in.)

Using a feeler gauge, measure the clearance between side of the vane pump rotor groove and the vane pump plates.

Maximum clearance:

0.033 mm (0.0013 in.)

Coat the flow control valve with power steering fluid and check that it falls smoothly into the flow control valve hole under its own weight.
If the value does not fall smoothly into the hole, replace the vane pump.

Check the flow control valve for leakage. Close one of the holes and apply compressed air at 392 to 490 kPa (4 to 5 kgf/cm², 57 to 71 psi) into the hole on the opposite side and confirm that air does not come out from the end holes.

Using a vernier caliper, measure the free length of the flow control valve compression spring.

Minimum free length:

32.3 mm (1.28 in.)

If the union seat in the pressure port union is severely damaged, it may cause fluid leakage. If the union seat is damaged, replace the vane pump assembly.