Replace the Bearings of All Transmission Shafts
REPLACING BEARINGS ON ALL GEARSHAFTS
- Transmission removed.
- Remove input and output shafts.
Bearing of output shaft in rear case section:
- Place rear case section on support 23 0 100 and lift with assembly hoist 00 1 490.
- Unscrew bolts.
- If installed, remove oil deflector plate (1).
- Remove retaining plate (2).
- Remove output shaft bearing with special tool 23 1 340 and handle 00 5 500 from the outside to the inside.
- Heat the rear case section in the area near the output shaft bearing to approx. 80°C (hot air blower). Install bearing, using if necessary, special tool 23 2 450 and handle 00 5 500 until securely driven into place.
- Clean screws and threaded bores.
- Install retaining plate (2) and oil scraper plate (1).
- Coat screws with Loctite 243 screw locking varnish and screw in.
- Tightening Torque: 10 Nm
Bearing on countershaft:
Note: The bearing can be retained with either a hex screw and washer or a Torx screw.
Hex screw with washer:
- Clamp the layshaft bearing in a vise with two protective pads (3).
Note: Screw (1) has a left-hand thread.
- Unscrew bolt (1).
- Take off washer (2).
Torx screw:
- Clamp countershaft in a vise with protective jaws.
Note: Screw (1) has a left-hand thread.
- Unscrew bolt (1).
- Press bearing (2) off countershaft with a special tool 23 1 250 on a hydraulic press.
- Press inner bearing race (3) off countershaft with special tool 00 7 500 / 23 1 250 on a hydraulic press.
Note: Taper (2) on outer bearing race must point upwards.
- Press new bearing (1) off countershaft with special tool 23 1 040 on a hydraulic press.
Torx screw:
- Clamp countershaft in a vise with protective jaws.
- Screw in new Torx screw (1) and tighten down.
- Tightening Torque: 90 Nm
Bearing of output shaft in front case section:
- Remove selector arm (1). For this purpose, unscrew screws (~ and 5). Remove bracket (3), spring (2) and selector arm (1). Remove retaining plate (6).
- Remove output shaft bearing with special tool 23 1 340 and handle 00 5 500 from the outside to the inside.
- Heat the front case section in the area near the bearing to approximately 80 °C (hot air blower).
- Install bearing, using, if necessary, special tool 23 1 470 and handle 00 5 500 until securely driven into place.
Bearing outer race of countershaft in front case section:
- Insert special tool 23 1 280 into the bearing shell (1).
- Apply Special tool 33 4 020.
- Screw on Special tool 23 1 300.
- Pull bearing shell out.
Installation:
- Insert bearing shell (1) that the slot in the bearing shell is aligned with beads (2) (turning lock) in the case.
- Push in bearing shell (1) with special tool 23 1 260 and handle 00 5 500.
- Locking device (2).
- Install retaining plate.
- For this purpose, push locking bolt (2) outward with a screw (1).
- Push the locking bolt (3) outward with a screwdriver (4).
- Install retaining plate and secure with screws.
- Install screws with Loctite 243 screw locking varnish.
- Tightening Torque: 10 Nm
- Remove screw (1).
- Note installation position of the pressure pin. Beveled sides must face each other inwards.
- Install roller (1) with selector arm (2).
- Install spring (4) and sleeve (1). Position shorter leg (K) on case and longer leg (L) in the slot on selector arm.
- Coat screw-head (2) contact surface with Loctite 574 seals compound.
- To ease assembly (strong spring force), insert special tool 23 1 250 in the selector arm and push sleeve (1) up to the case. While in this position, install screw (2) with Loctite 243 screw locking varnish and attach loosely.
- Then install screw (3) with Loctite 243 screw locking varnish and secure.
- Tighten screw (2) last.