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Oil Pump: Inspection

INSPECT NO. 1 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
1. Using a vernier caliper and straightedge, measure the distance between the spring end and the straightedge.
  Standard distance:
  
  6.52 mm (0.2567 in.)
  
  Fig 1: Measuring Distance Between Spring End And Straightedge
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
1. Using a caliper gauge, measure the inside diameter of the oil pump body bush.
  Maximum inside diameter:
  
  45.078 mm (1.7747 in.)
  
  If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly.
  
  Fig 2: Measuring Inside Diameter Of Front Oil Pump Body Bush
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT STATOR SHAFT ASSEMBLY
1. Using a caliper gauge, measure the inside diameter of the stator shaft bush.
  Maximum inside diameter:
  
  Front side:
  
  25.925 mm (1.0209 in.)
  
  Rear side:
  
  35.251 mm (1.3878 in.)
  
  If the inside diameter is greater than the maximum, replace the stator shaft assembly.
  
  Fig 3: Measuring 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 pump body.
Using a feeler gauge, measure the clearance between the driven gear and pump body.
Standard body clearance:

0.10 to 0.17 mm (0.0039 to 0.0067 in.)

If the body clearance is not as specified, replace the drive gear, driven gear and pump body.

Fig 4: Measuring Clearance Between Driven Gear And Pump Body
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using a feeler gauge, measure the 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.)

If the tip clearance is not as specified, replace the drive gear, driven gear and pump body.

Fig 5: Measuring Clearance Between Driven Gear Teeth And Drive Gear Teeth
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a steel straightedge and feeler gauge, measure the clearance between both gears and straightedge.

Standard side clearance:

0.03 to 0.05 mm (0.0012 to 0.002 in.)

Fig 6: Measuring Clearance Between Driven Gear And Pump Body

G04948819

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the side clearance is not as specified, replace the drive gear, driven gear and pump body.

HINT:

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

Standard drive and driven gears thickness

GEARS THICKNESS CHART

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 OIL PUMP DRIVE GEAR ROTATION
1. Place the oil pump assembly on the torque converter clutch.
2. Make sure that the drive gear rotates smoothly.
  
  Fig 7: Inspecting Oil Pump Drive Gear Rotates Smoothly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002