LOCATION AND SETTING.--The motor should be placed in as cool, clean and well ventilated a location as possible, away from acid or other fumes which would attack the metal parts or insulation, and should be easily accessible for cleaning and oiling. Do not put it in some corner where care of motor will be neglected because of the trouble of getting at it. The motor should be set so that the shaft is level and parallel with the shaft it is to drive so that the belt will run in the middle of the pulleys. Do not use a belt which is much too heavy or too light for the work it has to do, as it will materially reduce the output of the motor. The belt should be about one-half inch narrower than the pulley. ROTATION.--In order to reverse the direction of rotation, interchange leads A and B, and shift brush ring as shown in the diagram above. SUSPENDED MOTORS.--Motors with ring oil bearings may be used on the wall or ceiling by taking off end caps and revolving 90 or 180 degrees until the oil wells come directly below the bearings. STARTING.--Before starting the motor see that the armature revolves freely, that the bearings are full of oil, and the oil rings are in place and free to turn. Examine connections carefully to see that they are according to above diagram, after which proceed as follows: 1. Close the main knife switch. This action should not allow any current to pass through the motor (see Note 2); 2. Move the lever of the starting rheostat quickly and squarely onto the first segment, and hold it there for about a second; 3. Move the lever to the second segment and hold it there for about a second; 4. Move the lever to the third segment and hold it there for about a second, and so on from one segment to the next until the lever has been moved over all the segments to the short circuit position, where it should be held firmly by the retaining magnet. If the motor do not start when the lever of the starting rheostat is on the third segment, open the main knife switch and look for the trouble. This may consist of any of the following: a. Wrong connections; b. Too great a load on the motor; c. The motor brushes not in proper position; d. An open circuit of some kind; e. A short circuit of some kind. NOTE 1.--It is always advisable, in case of trouble, to make sure that the fields of the motor are magnetized. This test is easily made by first closing the main knife switch, then moving the lever of the starting rheostat to the first segment, and finally having an assistant place a screw driver or other piece of iron against the pole pieces of the motor. If the fields be magnetized, a heavy pull on the iron should result. NOTE 2.--Any possibility of arcing on the first contact of the starting rheostat when starting can be obviated by _first_ moving the lever onto the initial contact, holding it there, and then closing the main line switch, after which proceed as per paragraphs 3 and 4.