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Oil Pump: Inspection

INSPECT STATOR SHAFT SPRING SUB-ASSEMBLY
1. Using a vernier caliper and straightedge, measure the distance between the spring end and the straightedge.
  Standard thickness: 6.52 mm (0.257 in.)
  
  Fig 1: Measuring Distance Between Spring End And Straightedge
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
1. Using a caliper gauge, measure the inside diameter of the oil pump body bush.
  Maximum inside diameter: 45.078 mm (1.77 in.)
  
  If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly
  
  Fig 2: Measuring Inside Diameter Of Oil Pump Body Bush
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT STATOR SHAFT ASSEMBLY
1. Using a caliper gauge, measure the inside diameter of the stator shaft bush.
  Maximum inside diameter:
  
  Front side: 25.925 mm (1.02 in.)
  
  Rear side: 35.251 mm (1.39 in.)
  
  If the inside diameter is greater than the maximum, replace the stator shaft assembly
  
  Fig 3: Measuring Inside Diameter Of Stator Shaft Bush
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

Push the driven gear to one side of the pump body.
Using a feeler gauge, measure the clearance between the driven gear and pump body
Standard body clearance: 0.10 to 0.17 mm (0.00394 to 0.00669 in.)

If the clearance is not as specified, replace the drive gear, driven gear and pump body

Fig 4: Measuring Clearance Between Driven Gear And Pump Body
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using a feeler gauge, measure the clearance between the driven gear teeth and drive gear teeth.
Standard tip clearance: 0.07 to 0.15 mm (0.00276 to 0.00591 in.)

If the tip clearance is not as specified, replace the drive gear, driven gear and pump body.

Fig 5: Measuring Clearance Between Driven Gear Teeth And Drive Gear Teeth
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a steel straightedge and feeler gauge, measure the clearance between both gears and the straightedge.

Standard side clearance: 0.03 to 0.05 mm (0.00118 to 0.00197 in.)

If the side clearance is not as specified, replace the drive gear, driven gear and pump body.

HINT:

There are 7 different thicknesses for the drive and driven gears.

Fig 6: Measuring Clearance Between Both Gears And Straightedge

G04948819

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Drive and Driven Gear Thickness

DRIVE AND DRIVEN GEAR THICKNESS SPECIFICATION

Mark	Thickness
0	11.636 to 11.642 mm (0.45811 to 0.45835 in.)
1	11.643 to 11 649 mm (0.45838 to 0.45862 in.)
2	11.650 to 11.656 mm (0.45866 to 0.45890 in.)
3	11.657 to 11.663 mm (0.45894 to 0.45917 in.)
4	11.664 to 11.670 mm (0.45921 to 0.45945 in.)
5	11.671 to 11.677 mm (0.45949 to 0.45972 in.)
6	11.678 to 11.684 mm (0 45976 to 0.46000 in.)

INSPECT OIL PUMP DRIVE GEAR ROTATION
1. Place the oil pump assembly on the torque converter clutch
2. Make sure that the drive gear rotates smoothly.
  
  Fig 7: Inspecting Oil Pump Drive Gear Rotation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002