Oil Pump

A760F AUTOMATIC TRANSMISSION / TRANSAXLE: OIL PUMP: INSPECTION

1. INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY





(a) Using a dial indicator, measure the inside diameter of the oil pump body bush.

Standard inside diameter:

38.113 to 38.138 mm (1.5005 to 1.5015 in.)

* If the inside diameter is not as specified, replace the oil pump body sub-assembly.

2. INSPECT STATOR SHAFT ASSEMBLY

(a) Using a dial indicator, measure the inside diameter of the stator shaft bush.





Standard inside diameter:

Front side
21.501 to 21.527 mm (0.849 in.)

Rear side
31.97 to 32.03 mm (1.259 to 1.261 in.)

* If the inside diameter is not as specified, replace the stator shaft assembly.

3. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

(a) Push the driven gear to one side of the body.





(b) Using a feeler gauge, measure the body clearance.

Standard body clearance:

0.10 to 0.17 mm (0.00394 to 0.00669 in.)

Maximum body clearance:

0.17 mm (0.00669 in.)

* If the body clearance is more than the maximum, replace the drive gear, driven gear or pump body assembly. Replace the part or parts determined to be the most likely cause of the problem.

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





Standard tip clearance:

0.070 to 0.150 mm (0.00276 to 0.00591 in.)

Maximum tip clearance:

0.150 mm (0.00591 in.)

* If the tip clearance is more than the maximum, replace the drive gear, driven gear or pump body assembly. Replace the part or parts determined to be the most likely cause of the problem.

(d) Using a steel straightedge and feeler gauge, measure the side clearance of both gears.





Standard side clearance:

0.03 to 0.05 mm (0.00118 to 0.00197 in.)

Maximum side clearance:

0.05 mm (0.00197 in.)

If the side clearance is more than the maximum, replace the drive gear, driven gear or pump body assembly. Replace the part or parts determined to be the most likely cause of the problem.

HINT
There are 5 different thicknesses for the drive and driven gears.

Drive and Driven Gear Thickness:





4. INSPECT FRONT OIL PUMP DRIVE GEAR ROTATION





(a) Place the oil pump body on the torque converter clutch.

(b) Check that the drive gear rotates smoothly.

(c) Remove the oil pump body from the torque converter clutch.