Inspection

POWER ASSIST SYSTEMS: VANE PUMP (for 2TR-FE): INSPECTION

1. INSPECT VANE PUMP SHAFT AND BUSH IN FRONT HOUSING

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









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

(c) 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.)

(d) If the oil clearance is more than the maximum, replace the vane pump assembly.

2. INSPECT VANE PUMP ROTOR AND VANE PUMP PLATE

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





Standard thickness:

1.405 to 1.411 mm (0.0554 to 0.0555 in.)





(b) If the thickness is not as specified, replace the vane pump assembly.

(c) Using a feeler gauge, measure the clearance between the side of the vane pump rotor groove and the vane pump plate.





Maximum clearance:

0.025 mm (0.00098 in.)





(d) If the clearance is more than the maximum, replace the vane pump assembly.