Sequoia LTD 4WD V8-4.7L (2UZ-FE) (2001)
1. MEASURE PS VANE PUMP ROTATING TORQUE
a. Check that the pump rotates smoothly without abnormal noise.
b. Temporarily install the bolt.
c. Using a torque wrench, check the pump rotating torque.
Rotating torque: 0.28 Nm (2.8 kgf-cm, 2.4 inch lbs.) or less
2. REMOVE SUCTION PORT UNION
a. Remove the bolt and suction port union.
b. Remove the O-ring from the union.
3. REMOVE PRESSURE PORT UNION, FLOW CONTROL VALVE AND SPRING
a. Remove the pressure port union, flow control valve and spring.
b. Remove the O-ring from the pressure port union.
4. REMOVE REAR HOUSING
a. Remove the 4 bolts and rear housing.
HINT: If the wave washer and side plate are stuck to the rear housing, lightly tap the rear housing with a plastic hammer, and remove the
wave washer and side plate.
b. Remove the 2 O-rings from the rear housing.
5. REMOVE WAVE WASHER
6. REMOVE SIDE PLATE
7. REMOVE GASKET
8. REMOVE CAM RING, 10 VANE PLATES AND VANE PUMP ROTOR
a. Using a screwdriver, remove the snap ring from the vane pump shaft.
b. Remove the cam ring, 10 vane plates and vane pump rotor.
NOTICE: Be careful not to drop the plate.
9. REMOVE VANE PUMP SHAFT WITH VANE PUMP PULLEY
10. REMOVE STRAIGHT PINS
Remove the 2 pins from the front housing.
INSPECTION
1. CHECK OIL CLEARANCE BETWEEN VANE PUMP SHAFT AND BUSHING
Using a micrometer and caliper gauge, measure the oil clearance.
Standard clearance: 0.03 - 0.05 mm (0.0012 - 0.0020 inch)
Maximum clearance: 0.07 mm (0.0028 inch)
If it is more than the maximum, replace the shaft and front housing.
2. INSPECT VANE PUMP ROTOR AND VANE PLATES