Oil Pump: Inspection

WARNING: This page is about a different variant/trim than selected.

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 Using Dial Indicator
  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 Turns Smoothly
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 Using Feeler Gauge
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 Using Feeler Gauge
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a steel 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.)

Fig 5: Measuring Side Clearance Of Both Gears Using Steel Straightedge And Feeler Gauge

G04831463

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Drive Gear Thickness

THICKNESS REFERENCE CHART

No.	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 9.490 (0.3733 to 0.3736)

Driven Gear Thickness

THICKNESS REFERENCE CHART

No.	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 9.490 (0.3733 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:
  
  38.12 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: Measuring Inside Diameter Of Oil Pump Body Bushing Using Dial Indicator
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002