Oil Pump

U341E AUTOMATIC TRANSMISSION / TRANSAXLE: OIL PUMP: INSPECTION

1. INSPECT STATOR SHAFT ASSEMBLY

(a) 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.

(b) Install the input shaft assembly onto the stator shaft assembly and check that the input shaft assembly turns smoothly.





NOTICE:
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.

2. INSPECT OIL PUMP GEAR CLEARANCE

(a) 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.

(b) 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.

(c) 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 0.00196 in.)

Maximum side clearance:

0.05 mm (0.00196 in.)

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

Drive Gear Thickness:





Driven Gear Thickness:





3. INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY

(a) 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.