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Oil Pump: Inspection

INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the oil pump body bush.
  Standard inside diameter:
  
  45.064 to 45.078 mm (1.774 to 1.775 in.)
  
  If the inside diameter is more than the standard, replace the oil pump body sub-assembly.
Fig 1: Measuring Inside Diameter Of Oil Pump Body Bush
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT STATOR SHAFT ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the stator shaft bush.
  Standard inside diameter:
  
  25.900 to 25.921 mm (1.020 to 1.021 in.)
  
  If the inside diameter is more than the standard, replace the stator shaft assembly.
Fig 2: 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 body.
Using a feeler gauge, measure the body clearance.
Standard body clearance:

0.10 to 0.17 mm (0.00394 to 0.00669 in.)

Maximum body clearance:

0.17 mm (0.00669 in.)

If the body clearance is more than the maximum, replace the drive gear, driven gear or pump body assembly.

Fig 3: Measuring Body Clearance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using a feeler gauge, measure the tip clearance between the driven gear teeth and drive gear teeth.
Standard tip clearance:

0.070 to 0.150 mm (0.00276 to 0.00591 in.)

Maximum tip clearance:

0.150 mm (0.00591 in.)

If the tip clearance is more than the maximum, replace the drive gear, driven gear or pump body assembly.

Fig 4: Measuring Tip Clearance Between Driven Gear Teeth And Drive Gear Teeth
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using a steel straightedge and feeler gauge, measure the side clearance of both gears.
Standard side clearance:

0.03 to 0.05 mm (0.00118 to 0.00197 in.)

Maximum side clearance:

0.05 mm (0.00197 in.)

If the side clearance is more than the maximum, replace the drive gear, driven gear or pump body assembly.

Fig 5: Measuring Side Clearance Of Both Gears

G05155329

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

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

Drive and Driven Gears Thickness

DRIVE AND DRIVEN GEARS THICKNESS

Mark	Thickness
0	11.636 to 11.642 mm (0.4581 to 0.4583 in.)
1	11.643 to 11.649 mm (0.4584 to 0.4586 in.)
2	11.650 to 11.656 mm (0.4587 to 0.4589 in.)
3	11.657 to 11.663 mm (0.4589 to 0.4592 in.)
4	11.664 to 11.670 mm (0.4592 to 0.4594 in.)
5	11.671 to 11.677 mm (0.4595 to 0.4597 in.)
6	11.678 to 11.684 mm (0.4598 to 0.4600 in.)

INSPECT FRONT OIL PUMP DRIVE GEAR ROTATION
1. Place the oil pump assembly on the torque converter clutch.
2. Check that the drive gear rotates smoothly.
3. Remove the oil pump assembly from the torque converter.
Fig 6: Inspecting Front Oil Pump Drive Gear Rotation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002