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 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: Inspecting Stator Shaft Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT OIL PUMP GEAR CLEARANCE

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 (0.0028 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 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 (0.0039 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: Measuring Body Clearance
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

DRIVE GEAR THICKNESS SPECIFICATION

No.	Thickness mm (in.)
1	9.44 to 9.45 (0.3717 to 0.3720)
2	9.45 to 9.46 (0.3720 to 0.3724)
3	9.46 to 9.47 (0.3724 to 0.3728)
4	9.47 to 9.48 (0.3728 to 0.3732)
5	9.48 to 9.49 (0.3732 to 0.3736)

Fig 5: Measuring Side Clearance Of Both Gears

G04831463

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Driven gear thickness

DRIVE GEAR THICKNESS SPECIFICATION

No.	Thickness mm (in.)
1	9.44 to 9.45 (0.3717 to 0.3720)
2	9.45 to 9.46 (0.3720 to 0.3724)
3	9.46 to 9.47 (0.3724 to 0.3728)
4	9.47 to 9.48 (0.3728 to 0.3732)
5	9.48 to 9.49 (0.3732 to 0.3736)

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 38.138 mm (1.50050 to 1.50149 in.)
  
  Maximum inside diameter:
  
  38.138 mm (1.50149 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