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Oil Pump: Inspection

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  1. 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: 

      38.138 mm (1.5015 in.) 

      If the inside diameter is greater than the standard inside diameter, replace the oil pump body.

    Fig 1: Checking Inside Diameter Of Oil Pump Body Bushing
    G04046187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT STATOR SHAFT ASSEMBLY 
    1. Using a dial indicator, measure the inside diameter of the stator shaft bushing.

      Standard inside diameter: 

      21.527 mm (0.8475 in.) 

      If the inside diameter is greater than the standard inside diameter, replace the stator shaft.

    Fig 2: Checking Inside Diameter Of Stator Shaft Bushing
    G04046188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY 
    1. Push the driven gear to one side of the body.
    2. Using a feeler gauge, measure the clearance.

      Standard body clearance: 

      0.10 to 0.17 mm (0.0039 to 0.0067 in.) 

      If the body clearance is greater than the standard clearance, check the drive gear, the driven gear and the pump body.

      Fig 3: Checking Clearance Of Oil Pump Assembly
      G04046189Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a feeler gauge, measure the clearance between the driven gear teeth and the drive gear teeth.
      Fig 4: Checking Clearance Between Driven Gear Teeth And Drive Gear Teeth
      G04046190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard tip clearance: 

      0.070 to 0.150 mm (0.0028 to 0.0059 in.) 

      If the tip clearance is greater than the standard clearance, check the drive gear, the driven gear and the pump body.

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

      Standard side clearance: 

      0.02 to 0.04 mm (0.00079 to 0.00157 in.) 

      If the side clearance is greater than the standard thickness, check the drive gear, the driven gear and the pump body. 

      Fig 5: Checking Side Clearance Of Both Gears
      G04046191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. There are 7 different thicknesses for the drive and driven gears.

      Drive and driven gears thickness 

    DRIVE AND DRIVEN GEARS THICKNESS SPECIFICATION

    Mark Thickness
    0 9.946 to 9.952 mm (0.39157 to 0.39181 in.)
    1 9.953 to 9.959 mm (0.39185 to 0.39209 in.)
    2 9.960 to 9.966 mm (0.39213 to 0.39236 in.)
    3 9.967 to 9.973 mm (0.39240 to 0.39264 in.)
    4 9.974 to 9.980 mm (0.39268 to 0.39291 in.)
    5 9.981 to 9.987 mm (0.39295 to 0.39319 in.)
    6 9.988 to 9.994 mm (0.39323 to 0.39346 in.)
  4. INSPECT OIL PUMP DRIVE GEAR ROTATION 
    1. Make sure that the drive gear rotates smoothly.
    2. Remove the oil pump assembly from the torque converter.
    Fig 6: Checking Oil Pump Drive Gear Rotation
    G04046192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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