Lionel 726M-5 Armature- LN - The 726M-5 armature is used only in the 1946 726M-41 horizontal motor used in the 1946 version of the 726 Berkshire. This armature requires that a gear be installed at the end of the armature shaft once the armature is installed in the motor housing. These armatures are from our stocks and they will run much cooler in your 1946 version of the Berkshire, presuming that your motor housing has good bearings and the field windings and brush plate are in good serviceable condition. We will purchase your old motor or just your old armature - ask us, we will even send you a prepaid USPS label to send it to us!