Fluid Pump: Service and Repair

4 Speed Automatic 01M

ATF pump, disassembling and assembling
Replacement ATF pump parts and the ATF pump are allocated according to the transmission code.





1. Piston ring
- Check that it is correctly located see Fig. 1
- Installing see Fig. 2
2. Piston ring
- Check that it is correctly located see Fig. 1
- Installing see Fig. 2
3. Piston ring
- Check that it is correctly located see Fig. 1
- Installing see Fig. 2
4. Thrust washer
5. Piston
- Sealing lips are vulcanized to the piston
- Moisten sealing lips with ATF before inserting
- Turn piston slightly when installing
6. Bolt, 10 Nm
- Then turn 45° further
7. Stator support
8. Outer gear
- Manufacturer's marking (arrow) faces stator support
- If outer gear is incorrectly installed, the ATF pump may not operate freely in the installed position
9. Inner gear
- Larger groove faces stator support
10. Housing for ATF pump
11. O-ring
- Always replace
12. Torque converter oil seal
- Removing and installing





Fig. 1 Checking that the piston rings are correctly located
- Ensure that ends of piston rings are hooked together.





Fig. 2 Installing and hooking ends of piston ring together
- Place piston ring in groove.
- Press sides of ring in and guide ends over one another.

Note: Do not twist piston ring out of groove on one side.