2. Unscrew the filler plug 1.
3. Unscrew the plug 3 (figure 1.22c).
4. Unscrew drain plug 2 and drain the oil.
5. Screw in drain plug 2.
6. Fill the gearbox with oil so that its level is level with the top edge of the filler hole.
7. Screw in the filler plug 1.
8. Screw in a new plug 3.
Figure 1.22 a. Rear axle gearbox 742.50 (NOT 2): 1 - Filler plug, 2 - Drain plug.
Figure 1.226. Rear axle gearbox 741.13 (NOT 0): 1 - Filler plug; 2 - Drain plug.
Figure 1.22 B. Rear axle gearbox 742.50 (NOT 2): 3 - Cork.