Oil Pump Disassembly

Drivetrain. Corolla. Zre142 Aze141
U250E Automatic Transmission Transaxle. Corolla. Zre142 Aze141

  1. INSPECT OIL PUMP ASSEMBLY

  2. REMOVE CLUTCH DRUM OIL SEAL RING

  3. REMOVE STATOR SHAFT ASSEMBLY

  4. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

  5. REMOVE FRONT OIL PUMP DRIVE GEAR

  6. REMOVE FRONT OIL PUMP DRIVEN GEAR

  7. REMOVE FRONT OIL PUMP BODY O-RING

  8. REMOVE FRONT OIL PUMP OIL SEAL

Oil Pump -- Disassembly



1. INSPECT OIL PUMP ASSEMBLY


    Corolla. Zre142 Aze141

  1. Turn the drive gear with 2 screwdrivers and make sure that it rotates smoothly.

    NOTICE:
    Be careful not to damage the oil seal lip.


2. REMOVE CLUTCH DRUM OIL SEAL RING


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System.Oil Pump Disassembly

  1. Remove the 2 clutch drum oil seal rings.



3. REMOVE STATOR SHAFT ASSEMBLY


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System.Oil Pump Disassembly

  1. Using a "TORX" socket (T30), remove the 11 bolts and stator shaft.

  1. Keep the bolts in the order removed.



4. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System.Oil Pump Disassembly

  1. Push the driven gear to one side of the body.

  1. Using a feeler gauge, measure the clearance.

    Standard body clearance:
    0.10 to 0.17 mm (0.00394 to 0.00669 in.)
    Side clearance:
    0.02 to 0.05 mm (0.000787 to 0.00197 in.)
    Maximum body clearance:
    0.17 mm (0.00669 in.)
    If the body clearance is greater than the maximum, replace the oil pump body sub-assembly.


    Corolla. Zre142 Aze141

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

    Standard tip clearance:
    0.07 to 0.15 mm (0.00276 to 0.00591 in.)
    Maximum tip clearance:
    0.15 mm (0.00591 in.)
    If the tip clearance is greater than the maximum, replace the oil pump body sub-assembly.


    Corolla. Zre142 Aze141

  1. Using a straightedge and feeler gauge, measure the side clearance of both gears.

    Standard side clearance:
    0.02 to 0.05 mm (0.000787 to 0.00197 in.)
    Maximum side clearance:
    0.05 mm (0.00197 in.)
    Drive Gear Thickness
    Mark
    		Thickness (mm (in.))
    A
    		11.690 to 11.699 (0.4602 to 0.4606)
    B
    		11.700 to 11.709 (0.4606 to 0.4610)
    C
    		11.710 to 11.720 (0.4610 to 0.4614)
    D
    		11.721 to 11.730 (0.4615 to 0.4618)
    E
    		11.731 to 11.740 (0.4619 to 0.4622)
    Driven Gear Thickness
    Mark
    		Thickness (mm (in.))
    A
    		11.690 to 11.699 (0.4602 to 0.4606)
    B
    		11.700 to 11.709 (0.4606 to 0.4610)
    C
    		11.710 to 11.720 (0.4610 to 0.4614)
    D
    		11.721 to 11.730 (0.4615 to 0.4618)
    E
    		11.731 to 11.740 (0.4619 to 0.4622)


5. REMOVE FRONT OIL PUMP DRIVE GEAR


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System.Oil Pump Disassembly

  1. Remove the front oil pump drive gear.



6. REMOVE FRONT OIL PUMP DRIVEN GEAR


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System.Oil Pump Disassembly

  1. Remove the front oil pump driven gear.



7. REMOVE FRONT OIL PUMP BODY O-RING


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System.Oil Pump Disassembly

  1. Using a screwdriver, remove the O-ring.

    HINT:
    Tape the screwdriver tip before use.


8. REMOVE FRONT OIL PUMP OIL SEAL


    Corolla. Zre142 Aze141.U250E Automatic Transmission Transaxle.Automatic Transaxle System.Oil Pump Disassembly

  1. Mount the oil pump in a soft jaw vise.

  1. Using SST, remove the oil seal from the oil pump body.

    SST
    09308-00010