Oil Pump

DISASSEMBLY





1. REMOVE OIL SEAL RING
Remove the 2 oil seal rings from the stator shaft back side.





2. REMOVE STATOR SHAFT
Remove the 11 bolts and stator shaft.

HINT: Keep the gears in assembly order.





3. REMOVE FRONT OIL SEAL
Using a screwdriver, pry off the oil seal.
4. REMOVE DRIVE GEAR AND DRIVEN GEAR

INSPECTION





1. CHECK BODY CLEARANCE OF DRIVEN GEAR
Push the driven gear to one side of the body.
Using a feeler gauge, measure the clearance.
Standard body clearance: 0.07 - 0.15 mm (0.0028 - 0.0059 inch)
Maximum body clearance: 0.30 mm (0.0118 inch)
If the body clearance is greater than the maximum, replace the oil pump body sub-assembly.





2. CHECK TIP CLEARANCE OF DRIVEN GEAR
Using a feeler gauge, measure between the driven gear teeth and crescent-shaped part of the pump body.
Standard tip clearance: 0.11 - 0.14 mm (0.0043 - 0.0055 inch)
Maximum tip clearance: 0.30 mm (0.0118 inch)
If the tip clearance is greater than the maximum, replace the oil pump body sub-assembly.





3. CHECK SIDE CLEARANCE OF BOTH GEARS
a. Using a steel straightedge and feeler gauge, measure the side clearance of both gears.
Standard side clearance: 0.002 - 0.005 mm (0.0008 - 0.0020 inch)
Maximum side clearance: 0.100 mm (0.0039 inch)
b. There are 3 different thicknesses for drive and driven gears.





Drive and driven gear thickness:

If the thickest gear can not mark the side clearance within standard specification, replace the oil pump body sub-assembly.





4. CHECK OIL PUMP BODY BUSHING
Using a dial indicator, measure the inside diameter of the oil pump body bushing.
Maximum inside diameter: 38.18 mm (1.5031 inch)
If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly.





5. CHECK STATOR SHAFT BUSHING
Using a dial indicator, measure the inside diameter stator shaft bushing.
Maximum inside diameter:
Front side: 21.57 mm (0.8492 inch)
Rear side: 27.07 mm (1.0657 inch)
If the inside diameter is greater than the maximum, replace the stator shaft.

REASSEMBLY





1. INSTALL FRONT OIL SEAL
Using SST and a hammer, install a new oil seal. The seal end should be flush with the outer edge of the pump body.
SST 09350-32014 (09351-32140)





2. INSTALL DRIVEN GEAR AND DRIVE GEAR
Make sure the top of the gears are facing upward.





3. INSTALL STATOR SHAFT TO PUMP BODY
a. Align the stator shaft with each bolt hole.
b. Install the 11 bolts.
Torque: 10 Nm (100 kgf-cm, 7 ft. lbs.)





4. INSTALL OIL SEAL RING
Install the 2 oil seal rings to the stator shaft back side.

NOTICE: Do not spread the ring ends more than necessary.

HINT: After installing the oil seal rings, check that they move smoothly.





5. CHECK PUMP DRIVE GEAR ROTATION
Using 2 screwdrivers, turn the drive gear and make sure it rotates smoothly.

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