Brother MFC-J2320 Service Manual page 204

Assembling Note: Mount the Head/carriage unit, using the following steps.
1) When mounting a new Head/carriage unit, apply lubricant to the unit, as specified
in Section 5 of this
2) When mounting the CR timing belt, insert it into the Head/carriage unit so that the
toothed side faces inwards as shown below and make sure that the upper and lower
edges of the belt are fitted in the Latches.
chapter.
Fig. 3-76
3-74
Latches
Confidential