ATF Pump

ATF pump, 01V, 5 SPD. A/T





2. Locking washer
^ Checking for deformation

4. ATF pump housing
^ Checking contact surfaces for grooves and signs of wear
^ Checking brass sleeve for wear

5. Ring gear
^ Checking contact surfaces for grooves and signs of wear

6. Pump wheel
^ Checking contact surfaces for grooves and signs of wear
^ Checking coupling plate in pump wheel

8. Intermediate panel
^ Checking contact surfaces for grooves and signs of wear

10. ATF pump
^ Checking volume controlling valve of ATF pump for freedom of movement

14. Stator shaft
^ Checking brass sleeves for wear
^ Checking splines for wear

16. Rectangular rings for clutch "B"
^ Checking for wear

17. Rectangular ring for clutch "A"
^ Checking for wear

18. Axial needle bearing
^ Perform visual check for damage: Axial needle bearing and their contact surfaces must be like new, replace if necessary





Checking brass sleeve of ATF pump housing for wear
^ Check contact surface of brass sleeve - arrow - for wear.
^ Contact surface must not be heavily scored and/or show blue discoloration.
^ Replace ATF pump if necessary.

If no blue discoloration and only small grooves are detected, proceed as follows:
^ Sandpaper (600 grit, oiled) contact surface 1 to 2 times.
^ Carefully wipe off with a clean rag and check contact surface.
^ Contact surface must now be like new.

If scores cannot be removed in this manner:
^ Replace ATF pump if necessary.





^ Check torque converter hub - arrow - for wear.

If wear on torque converter can be recognized:
^ Replace torque converter.





Checking components of ATF pump for grooves and signs of wear
^ Check contact surfaces of the following components for grooves and signs of wear:
2. ATF pump housing
3. Ring gear
4. Pump wheel
5. Intermediate panel

^ Surfaces of contact surfaces must be matt or shiny but without any sign of groove.

Note:
^ A malfunctioning ATF pump will cause delays in drive and shifting procedures.





Checking coupling plate in pump wheel
^ Check whether coupling plates - arrows - on ATF pump wheel show pressure marks or are broken off, replace ATF pump if necessary.

Causes:
A - Torque converter not completely inserted during transmission or engine installation
B - Centering sleeve for torque converter not inserted in crankshaft

CAUTION: Always check for broken coupling plates and remove.





Checking volume controlling valve in ATF pump

Check volume controlling valve as follows:
^ Move valve piston against spring pressure.
^ Valve piston must move freely in both directions of movement - arrow
^ Valve must not have grooves.
^ No shavings must be jammed in opening - 1 -.

Note:
^ If valve piston is stuck or opening - 1 - is plugged, there will possibly be no actuation.





Checking brass sleeves of stator shaft for wear
^ Check contact surfaces of brass sleeves - arrows - at inside of shaft for wear.
^ Contact surfaces must not be heavily scored and/or show blue discoloration.
^ Replace stator shaft if necessary.

If no blue discoloration and only small grooves are detected, proceed as follows:
^ Sandpaper (600 grit, oiled) contact surface 1 to 2 times.
^ Carefully wipe off with a clean rag and check contact surface.
^ Contact surfaces must now be like new.

If scores cannot be removed in this manner:
^ Replace stator shaft.





Checking rectangular rings -item 16- for wear

Note:
^ Always replace rectangular rings. However, conclusions can be drawn from signs of wear of the rectangular rings regarding the quality of contact surface for rectangular rings. Evaluating the rectangular rings for wear is therefore essential.

If rectangular rings show strong axial wear of more than 0.3 mm - arrow 1 - (slight wear of outer edges is normal):
^ Replace stator shaft.

If rectangular rings show strong radial wear of more than 0.3 mm - arrow 2 - (for comparison, measure thickness of new rectangular ring):
^ Replace cylinder "B".





Checking rectangular ring -item 17- for wear

Note:
^ Always replace rectangular ring. However, conclusions can be drawn from signs of wear of the rectangular ring regarding the quality of contact surface for rectangular rings. Evaluating the rectangular ring for wear is therefore essential.

If rectangular ring shows strong axial wear of more than 0.3 mm - arrow 1 - (slight wear of outer edges is normal):
^ Replace stator shaft.

If rectangular ring shows strong radial wear of more than 0.3 mm - arrow 2 - (for comparison, measure thickness of new rectangular ring):
^ Replace cylinder "A".