Brother GTX-4 Service Manual page 264

Assembly
(1) To perform the assembly, take the reverse procedures to disassembly operation.
(2) Attach large and small rubber caps to the maintenance unit.
<IMPORTANT>

Use hands to prevent damages to the cap rubbers.

Make sure the rubbers are securely attached.
Concerning cap rubber small, the tabs on the rubber should be securely lodged into the left / right holes on the sides of the
holder.
Cap rubber small
(3) Attach large and small caps onto the maintenance unit.
<CAUTION>

Front / Rear and sides are designated for the large and small caps.
Cap rubber large
Tabs on cap rubber small
Rearward
Top side
6-73
Disassembly / Replacement / Adjustment
Rearward
Top side