Oil Pump

COMPONENTS

DISASSEMBLY OF OIL PUMP




1. REMOVE OIL SEAL RINGS
Remove the two oil seal rings from the stator shaft back side.




2. REMOVE THRUST WASHER FROM STATOR SHAFT BACK SIDE




3. REMOVE STATOR SHAFT
Remove the eleven bolts and stator shaft. Keep the gears in assembly order.




4. REMOVE FRONT OIL SEAL
Pry off the oil seal with a screwdriver.

INSPECTION OF OIL PUMP




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 in.)
Maximum body clearance: 0.3 mm (0.012 in.)

If the body clearance is greater than the maximum, replace the oil pump body subassembly.




2. CHECK TIP CLEARANCE OF DRIVEN GEAR
Measure between the driven gear teeth and the crescent- shaped part of the pump body.

Standard tip clearance: 0.11 - 0.14 mm (0.0043 - 0.0055 in.)
Maximum tip clearance: 0.3 mm (0.012 in.)

If the tip clearance is greater than the maximum, replace the oil pump body subassembly.




3. CHECK SIDE CLEARANCE OF BOTH GEARS
Using a steel straightedge and a feeler gauge, measure the side clearance of both gears.

Standard side clearance: 0.02 - 0.05 mm (0.0008 - 0.0020 in.)
Maximum side clearance: 0.1 mm (0.004 in.)

There are three different thicknesses for drive and driven gears.

Drive and driven gear thickness:
Mark Thickness
A 9.440 - 9.456 mm (0.3717 - 0.3723 in.)
B 9.456 - 9.474 mm (0.3723 - 0.3730 in.)
C 9.474 - 9.490 mm (0.3730 - 0.3736 in.)

If the thickest gear can not make the side clearance within standard specification, replace the oil pump body subassembly.




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 in.)

If the inside diameter is greater than the maximum, replace the oil pump body subassembly.




5. CHECK STATOR SHAFT BUSHINGS
Using a dial indicator, measure the inside diameter of the stator shaft bushings.

Maximum inside diameter:
Front side 21.57 mm (0.8492 in.)
Rear side 27.07 mm (1.0657 in.)

If the inside diameter is greater than the maximum, replace the stator shaft.

ASSEMBLY OF OIL PUMP




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 - 32013 (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. Torque the eleven bolts.

Torque: 100 kg-cm (7 ft-lb, 10 N.m)




4. INSTALL THRUST WASHER
a. Coat the thrust washer with petroleum jelly.
b. Align the tab of the washer with the hollow of the pump body.




5. INSTALL OIL SEAL RINGS
Install the two oil seal rings to the stator shaft back side.

CAUTION: Do not spread the ring ends more than necessary

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




6. CHECK PUMP DRIVE GEAR ROTATION
Turn the drive gear with two screwdrivers and make sure it rotates smoothly.

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