VANE PUMP (for 5L-E) INSPECTION

INSPECT VANE PUMP SHAFT AND BUSHING IN FRONT VANE PUMP HOUSING
1. Using a micrometer and vernier calipers, measure the oil clearance.
  
  Maximum oil clearance
  
  0.07 mm (0.0028 in.)
  
  If oil clearance exceeds the maximum, replace the vane pump assembly.
INSPECT VANE PUMP ROTOR AND VANE PUMP PLATES
1. 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.)
2. Using a feeler gauge, measure the clearance between a side face of the vane pump rotor groove and the vane pump plates.
  
  Maximum clearance
  
  0.03 mm (0.0012 in.)
  
  If clearance exceeds the maximum, replace the vane pump assembly.
INSPECT FLOW CONTROL VALVE
1. 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 it lacks smoothness, replace the vane pump assembly.
2. Check the flow control valve for leakage. Close one of the holes and apply compressed air, 392 to 490 kPa (4 to 5 kgf/cm², 57 to 71 psi), into the opposite side hole, and confirm that air does not come out from the end holes.
  
  If air leaks, replace the vane pump assembly.
INSPECT FLOW CONTROL VALVE COMPRESSION SPRING
1. Using vernier calipers, measure the free length of the flow control valve compression spring.
  
  Minimum free length
  
  32.3 mm (1.272 in.)
  
  If the length is less than the minimum, replace the vane pump assembly.
INSPECT PRESSURE PORT UNION

If the union seat in the pressure port union is severely damaged, it may cause fluid leakage. In that case, replace the vane pump assembly.
INSPECT TOTAL PRELOAD
1. Check that the pump rotates smoothly without abnormal noise.
2. Temporarily install the vane pump pulley set nut to the vane pump shaft.
3. Using a torque wrench, check the rotating torque.
  
  Rotating torque
  
  0.27 N*m (2.8 kgf*cm , 2.4 in.*lbf) or less