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.)
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.





(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 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.)










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.