Replacing Bearings of All Transmission Shafts
Replacing Bearing and All Transmission Shafts
- Transmission Removed -
Remove input/output shaft assembly.
A) Input Shaft, Layshaft in Front Case Section
Input Shaft: Drive out grooved ball bearing with Special Tools 23 1 480 and 00 5 500.
Transmission 260/6: Drive out double bearing with Special Tools 23 1 410 and 00 5 500.
Transmission 260/6: Heat front case section in area of the bearing to about 80° C (175°F) with hot air blower.
Note: Install bearings with rollers for gear wheel set, driving in to fit tight with Special Tools 23 1 470 and 00 5 500.
Layshaft: Loosen circlip (1) with a single knock from Special Tool 23 1 270 used in conjunction with Special Tool 00 5 500.
Liftout circlip (2).
Remove shim (3).
Drive out bearing shell toward inside with Special Tools 23 1 270 and 00 5 500.
Version with O-ring:
Lift out O-ring (4) with a feeler gage blade.
Note: Replace O-ring
Install O-ring in groove and coat it with engine oil prior to installation of the bearing shell.
B) Output Shaft, Layshaft in Rear Case Section
Output shaft: Unscrew bolt (1)
Caution: Spring force.
Remove spring (2).
Installation
Install bolt with a bolt cement
Tighten torque
Install Special Tool 23 1 250 for removal of the selector arm.
Unscrew socket head screw (3).
Installation
Install screw with a bolt cement
Tighten torque
Remove selector arm from above.
Note: Roller
Installation
Insert selector arm with Special Tool 23 1 250
Swing out selector arm with roller over lever (4)
Move end of spring (3) over the raised point into installed position.
press down on the selector arm in this position (do not knock down).
Install the socket head screw with a bolt cement and tighten with correct torque prior to removal of the special tool.
Remove bearing holder (5).
Note: Do not loosen bolt (6)
Locking lever (7) remains on the bearing holder.
Installation
Check installed position of locking lever (7) and trust pin (8).
Lift out radial oil seal.
Drive out grooved ball bearing with Special Tools 23 1 120 and 00 5 500.
Note: Shim X
Determine thickness of shim X.
Measure distance (A).
Measure distance (B)
Example:
A = 20.3 mm (0.799")
- B = 20.0 mm (0.787")
--------------------------
X = 0.3 mm (0.012") thick shim
Heat rear case section in area of the
grooved ball bearing to about 80° C
(175 ° F) with a hot air blower.
Install grooved ball bearing.
Note: the grooved ball bearing inner race
has a protrusion which faces the gear wheel set.
If necessary, drive in against the stop with Special Tool 23 1 470.
Transmission 260/6: Split bearing inner races:
The bearing inner race with an opening for a ball
(turning lock) must be installed on the output shaft
Layshaft: Insert the stronger end of Special Tool
23 1 280 in the bearing shell.
Apply Special Tool 33 4 020
Screw on Special Tool 23 1 300.
Pull out bearing shell.
Drive in bearing shell with Special
Tool 23 1 260 and 00 5 500.
Determine Axial Play of Layshaft:
Install circlip (2).
Install old shims.
Drive in bearing shell to fit tight in
front case section with Special Tools
23 1 260 and 00 5 500.
Note: Oil groove must be aligned with
groove in the case.
Place layshaft with roller bearings in the rear case section.
Install and mount front case section with two bolts
opposite each other.
Center front case section slightly with the dowel pins.
Unscrew oil filler plug (1).
Mount holder with dial gage.
Dial gage must be applied on a tooth of the layshaft.
Check axial play of the layshaft through the bore
for the oil filler plug.
Axial play = 0.13 to 0.23 mm (0.005 to 0.009").
Correct, when necessary, by removing the bearing
shell and installing a thicker shim.
Install gear wheel set.
Determine thickness of shim for input shaft.
Install old shim and circlip.
Reduce play to 0...0.09 mm (0 to 0.0035").
Determine thickness of shim for the guide sleeve