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Oil Pump: Inspection

INSPECT NO. 1 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY

Fig 1: Measuring Distance Between Spring
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.)
INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY

Fig 2: Measuring Inside Diameter Of Oil Pump Body Bush
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
INSPECT STATOR SHAFT ASSEMBLY

Fig 3: Measuring Inside Diameter Of Stator Shaft Bush
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.

INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

Fig 4: Measuring Clearance Between Driven Gear And Pump Body

G04948817

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.
Using a feeler gauge, measure the clearance between the driven gear teeth and drive gear teeth.

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

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.

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

Fig 6: Measuring Clearance Between Both Gears

G04948819

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard side clearance:

0.03 to 0.05 mm (0.0012 to 0.002 in.)

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

DRIVE AND DRIVEN GEARS THICKNESS SPECIFICATION

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

Fig 7: Checking Oil Pump Drive Gear Rotation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Place the oil pump assembly on the torque converter clutch.
2. Make sure that the drive gear rotates smoothly.