Note: Refer to the figure above for assembly.
1. Pry off the brush springs with a screwdriver, then slide the brushes approximately halfway out of the holders and release the springs to lock the brushes in that position.
2. Insert the rotor into the housing, then pry the brush springs again and push the brushes in until they snap into place against the commutator, then release the springs by pressing them against the ends of the brushes.
3. Install the end cap on the brush holder.