Brother MFC-9130CW Service Manual page 301

(7) Remove the five Taptite bind B M4x12 screws to remove the Main drive unit from the Side
frame L ASSY.
Taptite bind B M4x12
<Left side>
Taptite bind B M4x12
Note:
As the two gears (DX gear Z21 and PP gear Z14-51) shown in the figure tend to come off.
Be careful not to lose them.
<Back side>
Side frame L ASSY
Main drive unit
Fig. 3-195
DX gear Z21
Fig. 3-196
Taptite bind B M4x12
Side frame L ASSY
PP gear Z14-51
3-138
<Front side>
Confidential