Note: All shaft sealing rings can be replaced with the gearbox installed, apart from the input-side shaft sealing ring on the input shaft.
- Replace all shaft sealing rings if the gearbox is fully disassembled.
- Lightly oil the sealing lips before installing the shaft sealing rings.
Replacing input shaft sealing ring at input side
- Lever out the shaft sealing ring with a screwdriver.
- Drive in the new sealing ring with the sealing lips facing inwards, using slip-over sleeve, BMW No. 234 712, and drift, BMW No. 234 711.
Replacing output shaft sealing ring
Caution: The sealing washer for the grooved ball bearing is immediately behind the shaft sealing ring: take care not to damage the sealing washer when removing the sealing ring.
- Carefully lever out the shaft sealing ring with a screwdriver.
- Install the sealing ring with the sealing lip facing inwards, using assembly sleeve, BMW No. 234732, and drift, BMW No. 23 4 731.
Replacing shaft sealing ring for selector shaft of reverser
- Remove the gear-shift lever.
- Lever out the shaft sealing ring with a screwdriver.
- Drive in the new sealing ring with the sealing lips facing inwards, using slip-over sleeve, BMW No. 234772, and drift, BMW No. 234771.
- Reinstall the gear-shift lever
Replacing input shaft sealing ring at output side
- Pierce the shaft sealing ring with awl, BMW No. 008583.
- Screw the pull rod, BMW No. 008581, into the hold and use impact weight, BMW No. 008582, to remove the shaft sealing ring.
- Install the new sealing ring with the sealing lips facing inwards, using guide, BMW No. 234722, and drift, BMW No. 234721.
Replacing shaft sealing ring for selector drum
- Lever the shaft sealing ring out with a screwdriver.
- Install the new sealing ring with the sealing lip facing inwards, using drift, BMW No. 234750.
Replacing shaft sealing ring for selector shaft
- Lever the shaft sealing ring out with a screwdriver.
- Install the sealing ring with the sealing lip facing inwards, using assembly sleeve, BMW No. 234612, and drift, BMW No. 234740.