Oil Pump: Inspection

INSPECT STATOR SHAFT ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the stator shaft bushings.
  Standard inside diameter: 21.50 to 21.52 mm (0.846 to 0.847 in.)
  
  Maximum inside diameter: 21.52 mm (0.847 in.)
  
  If the inside diameter is greater than the maximum, replace the stator shaft.
  
  Fig 1: Measuring Inside Diameter Of Stator Shaft Bushings
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Install the input shaft assembly onto the stator shaft assembly and check that the input shaft assembly turns smoothly.
NOTE: Replace the stator assembly with a new one if it moves roughly or makes unusual noise. Inspect the input shaft's contact surface with the bearing when replacing, and replace the input shaft with a new one if any damage or discoloration is found.

Fig 2: Checking Input Shaft Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT OIL PUMP GEAR CLEARANCE

Using a feeler gauge, measure the clearance between the tips of the driven gear teeth and the drive gear teeth.
Standard tip clearance: 0.07 to 0.15 mm (0.00275 to 0.00590 in.)

Maximum tip clearance: 0.15 mm (0.00590 in.)

If the tip clearance is greater than the maximum, replace the oil pump body sub-assembly.

Fig 3: Measuring Clearance Between Tips Of Driven Gear Teeth And Drive Gear Teeth
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Push the driven gear to one side of the body. Using a feeler gauge, measure the clearance.
Standard body clearance:

0.10 to 0.15 mm (0.00393 to 0.00590 in.)

Maximum body clearance:

0.15 mm (0.00590 in.)

If the body clearance is greater than the maximum, replace the oil pump body sub-assembly.

Fig 4: Measuring Clearance Between Driven Gear And Oil Pump Body Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using a straightedge and feeler gauge, measure the side clearance of both gears.
Standard side clearance:

0.02 to 0.05 mm (0.000787 to 0.00196 in.)

Maximum side clearance:

0.05 mm (0.00196 in.)

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

Fig 5: Measuring Side Clearance Of Gears
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Drive Gear Thickness

DRIVE GEAR THICKNESS CHART

Mark	Thickness mm (in.)
1	9.440 to 9.449 (0.3717 to 0.3720)
2	9.450 to 9.459 (0.3720 to 0.3724)
3	9.460 to 9.47 (0.3724 to 0.3728)
4	9.471 to 9.480 (0.3729 to 0.3732)
5	9.481 to 9.49 (0.3733 to 0.3736)

Driven Gear Thickness

DRIVEN GEAR THICKNESS CHART

Mark	Thickness mm (in.)
1	9.440 to 9.449 (0.3717 to 0.3720)
2	9.450 to 9.459 (0.3720 to 0.3724)
3	9.460 to 9.470 (0.3724 to 0.3728)
4	9.471 to 9.480 (0.3729 to 0.3732)
5	9.481 to 9.49 (0.3733 to 0.3736)

INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY

Using a dial indicator, measure the inside diameter of the oil pump body bushing.
Standard inside diameter:

38.12 to 38.13 mm (1.500 to 1.501 in.)

Maximum inside diameter:

38.13 mm (1.501 in.)

If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly.

Fig 6: Inspecting Front Oil Pump Body Sub-Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002