Oil Pump: Inspection

INSPECT STATOR SHAFT ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the stator shaft bushings.
  Standard inside diameter: 21.500 to 21.526 mm (0.84646 to 0.84748 in.)
  
  Maximum inside diameter: 21.526 mm (0.84748 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 to the stator shaft assembly, check that the input shaft assembly turns smoothly.
  NOTE: Replace the stator shaft assembly with new one if rough movement or unusual noise is identified. When replacing, inspect the input shaft's contact surface with the bearing and if any damage or discolor is found, replace the input shaft with new one.
  
  Fig 2: Inspecting Input Shaft'S
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

Measure the tip clearance between the driven gear teeth and drive gear teeth.
Standard tip clearance: 0.07 to 0.15 mm (0.0028 to 0.0059 in.)

Maximum tip clearance: 0.15 mm (0.0059 in.)

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

Fig 3: Measuring Tip Clearance Between 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: 0.100 to 0.151 mm (0.0039 to 0.0059 in.)

Maximum body clearance: 0.15 mm (0.0059 in.)

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

Fig 4: Pushing Driven Gear To One Side Of Body
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a steel straight edge and feeler gauge, measure the side clearance of both gears.

Standard side clearance: 0.02 to 0.05 mm (0.0008 to 0.0020 in.)

Maximum side clearance: 0.05 mm (0.0020 in.)

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

Drive gear thickness: mm (in.)

Fig 5: Measuring Side Clearance Of Both Gears

G04463670

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

THICKNESS SPECIFICATION

No.	Thickness
1	9.44 to 9.45 (0.3709 to 0.3713)
2	9.45 to 9.46 (0.3713 to 0.3717)
3	9.46 to 9.47 (0.3717 to 0.3721)
4	9.47 to 9.48 (0.3721 to 0.3725)
5	9.48 to 9.49 (0.3725 to 0.3729)

Driven gear thickness: mm (in.)

DRIVEN GEAR THICKNESS SPECIFICATION

No.	Thickness
1	9.44 to 9.45 (0.3709 to 0.3713)
2	9.45 to 9.46 (0.3713 to 0.3717)
3	9.46 to 9.47 (0.3717 to 0.3721)
4	9.47 to 9.48 (0.3721 to 0.3725)
5	9.48 to 9.49 (0.3725 to 0.3729)

INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the oil pump body bushing.
  Standard inside diameter: 38.113 to 38138 mm (1.50050 to 1.50149 in.)
  
  Minimum inside diameter: 38.188 mm (1.50349 in.)
  
  If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly.
  
  Fig 6: Measuring Inside Diameter Of Oil Pump Body Bushing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002