Oil Pump

U250E AUTOMATIC TRANSMISSION / TRANSAXLE: OIL PUMP: INSPECTION

INSPECTION

1. INSPECT OIL PUMP ASSEMBLY





(a) Turn the drive gear with 2 screwdrivers and make sure that it rotates smoothly.
NOTE: Be careful not to damage the oil seal lip.

2. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY





(a) Push the driven gear to one side of the body.
(b) Using a feeler gauge, measure the 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 greater than the maximum, replace the oil pump body sub-assembly.





(c) 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.





(d) Using a straightedge and a feeler gauge, measure the side clearance of both gears.
Standard side clearance:
0.02 to 0.05 mm (0.000784 to 0.00197 in.)
Maximum side clearance:
0.05 mm (0.00197 in.)
If the side clearance is greater than the maximum, replace the drive gear, driven gear or pump body.










3. INSPECT FRONT OIL PUMP AND GEAR BODY SUB-ASSEMBLY





(a) Using a dial indicator, measure the inside diameter of the oil pump body bushing.
Standard inside diameter:
38.113 to 38.138 mm (1.50051 to 1.50149 in.)
Maximum inside diameter:
38.188 mm (1.50346 in.)
If the inside diameter is greater than the maximum, replace the oil pump and gear body sub-assembly.
4. INSPECT STATOR SHAFT ASSEMBLY





(a) Using a dial indicator, measure the inside diameter of the stator shaft.
Standard inside diameter:
21.500 to 21.526 mm (0.84646 to 0.84748 in.)
Maximum inside diameter:
21.57 mm (0.8492 in.)
If the inside diameter is greater than the maximum, replace the stator shaft.