Review on 🧊 High-Performance Slot Shaft Plow Motor for Fisher & Western Snow Plow Applications - 21500K-1, 48285, 46-2473, 46-2584, 46-3618, 46-4175 MKW4009, MUE6103, MUE6111S, MUE6206AS, MUE6306 by Jerome Brooks

I fitted this to a Fisher MM1 and it fitted perfectly. Before installing to the pump, you must remove the end cap AND the plastic shipping sleeve. Try not to let the armature out of the case. If it slips away from you, simply remove the back (top) cover and gently pull back the 4 brushes and thread the anchor back through them. In some cases it may be easier to remove the cover to align the armature with the pump slot. Polarity is not marked either. As said, the lead on the left is negative and the lead on the right is positive. The rest works perfectly!