Oil Pump

OIL PUMP

COMPONENTS:

DISASSEMBLY





1. REMOVE OIL PUMP O-RING
(a) Remove the O-ring from the oil pump.





2. FIX OIL PUMP ASSEMBLY
(a) Place the oil pump body on the torque converter clutch.





3. REMOVE CLUTCH DRUM OIL SEAL RING
(a) Remove the 4 oil seal rings.





4. REMOVE NO. 1 BRAKE PISTON
(a) Using a T30 "TORX" wrench, remove the 5 bolts, brake piston return spring sub-assembly and No. 1 brake piston.
(b) Remove the 2 O-rings from the No. 1 brake piston.





5. REMOVE STATOR SHAFT CLUTCH DRUM THRUST WASHER
6. INSPECT NO. 1 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY





7. REMOVE STATOR SHAFT ASSEMBLY
(a) Remove the 2 bolts and stator shaft from the oil pump body.
8. REMOVE FRONT OIL PUMP BODY O-RING
(a) Remove the oil pump body from the torque converter clutch.





(b) Remove the O-ring from the oil pump body.
9. INSPECT STATOR SHAFT ASSEMBLY
10. INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
11. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY





12. REMOVE FRONT OIL PUMP DRIVE GEAR
(a) Remove the drive gear.





13. REMOVE FRONT OIL PUMP DRIVEN GEAR
(a) Remove the driven gear.





14. REMOVE FRONT OIL PUMP OIL SEAL
(a) Using a screwdriver, pry out the oil seal.

NOTICE: Do not damage the bushing and oil pump body.

INSPECTION





1. INSPECT NO. 1 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
(a) Using a vernier caliper and straightedge, measure the distance between the spring end and the straightedge.
Standard distance: 6.52 mm (0.2567 in.)





2. INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
(a) Using a caliper gauge, measure the inside diameter of the oil pump body bush.
Maximum inside diameter: 45.078 mm (1.7747 in.)
If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly.





3. INSPECT STATOR SHAFT ASSEMBLY
(a) Using a caliper gauge, measure the inside diameter of the stator shaft bush.
Maximum inside diameter:
Front side: 25.925 mm (1.0209 in.)
Rear side: 35.251 mm (1.3878 in.)
If the inside diameter is greater than the maximum, replace the stator shaft assembly.





4. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY
(a) Push the driven gear to one side of the pump body.
(b) Using a feeler gauge, measure the clearance between the driven gear and pump body.
Standard body clearance: 0.10 to 0.17 mm (0.0039 to 0.0067 in.)
If the body clearance is not as specified, replace the drive gear, driven gear and pump body.





(c) Using a feeler gauge, measure the clearance between the driven gear teeth and drive gear teeth.
Standard tip clearance: 0.07 to 0.15 mm (0.0028 to 0.0059 in.)
If the tip clearance is not as specified, replace the drive gear, driven gear and pump body.





(d) Using a steel straightedge and feeler gauge, measure the clearance between both gears and straightedge.
Standard side clearance: 0.03 to 0.05 mm (0.0012 to 0.002 in.)
If the side clearance is not as specified, replace the drive gear, driven gear and pump body.

HINT: There are 7 different thicknesses for the drive and driven gears.

Standard drive and driven gears thickness:

5. INSPECT OIL PUMP DRIVE GEAR ROTATION
(a) Place the oil pump assembly on the torque converter clutch.
(b) Make sure that the drive gear rotates smoothly.

REASSEMBLY





1. INSTALL OIL PUMP FRONT OIL SEAL
(a) Using SST and a hammer, tap in a new oil seal.
SST 09350-30020 (09351-32140)
Standard depth: 0 ± 0.2 mm (0.008 in.)

HINT: The oil seal end should be flush with the outer edge of the pump body.

(b) Coat the lip of the oil seal with MP grease.
2. FIX FRONT OIL PUMP BODY SUB-ASSEMBLY
(a) Place the oil pump body on the torque converter clutch.





3. INSTALL FRONT OIL PUMP DRIVEN GEAR
(a) Coat the driven gear with ATF.
(b) Install the driven gear to the oil pump body.





4. INSTALL FRONT OIL PUMP DRIVE GEAR
(a) Coat the drive gear with ATF.
(b) Install the drive gear to the oil pump body.





5. INSTALL FRONT OIL PUMP BODY O-RING
(a) Coat a new O-ring with ATF.
(b) Install the O-ring to the oil pump body.





6. INSTALL STATOR SHAFT ASSEMBLY
(a) Align the stator shaft with each bolt hole and install it.
(b) Install the 2 bolts.
Torque: 11 N*m (112 kgf*cm, 8 ft.*lbf)





7. INSTALL STATOR SHAFT CLUTCH DRUM THRUST WASHER
(a) Align the 2 claws and install the thrust washer.





8. INSTALL NO. 1 BRAKE PISTON
(a) Coat 2 new O-rings with ATF and install them to the No. 1 brake piston.





(b) Install the No. 1 brake piston and brake piston return spring sub-assembly.
(c) Using a T30 "TORX" wrench, install the 5 bolts.
Torque: 11 N*m (112 kgf*cm, 8 ft.*lbf)
9. INSPECT OIL PUMP DRIVE GEAR ROTATION





10. INSTALL CLUTCH DRUM OIL SEAL RING
(a) Coat 4 new oil seal rings with ATF.
(b) Squeeze the ends of the 4 oil seal rings so that the gap becomes 8 mm (0.32 in.) or less, and then install them to the stator shaft groove.

NOTICE: Do not expand the ring ends excessively.

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





11. INSTALL OIL PUMP O-RING
(a) Install a new O-ring to the oil pump.