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492 HANDBOOK OF PROJECTION FOR
NO. 2.— LOCATING THE MOTOR GENERATOR.— (See
General Instruction No. 1.)
NO. 3.— INSTALLATION.— (See General Instruction No. 2.) NO. 4.— CLEANLINESS.— (See General Instruction No. 4.) NO. 5.— LOOSE CONNECTIONS.— (See General Instruction No. 6.)
NO. 6.— AMMETER AND VOLTMETER.— (See General Instruction No. 7.)
NO. 7.— REMOVING END BEARING BRACKET 2, P. 1.— It will never be necessary to remove this bracket unless some fault should develop through the use of improper grease, or a very improbable inherent imperfection in the ball bearings, but should such a thing occur you may remove end bearing bracket 2, P. 1, by first removing four hexagon shaped nuts, holding the cast iron cover of the grease chamber. These nuts do not show in the plates, but correspond to nuts 24, P. 1, in the grease chamber cover at the opposite end of the machine. The studs, which are held by four hexagon nuts, not only hold the outside cast iron cover to the grease chamber, but extend through and into an inside cast iron grease chamber cover. The ball bearings are clamped between these two end covers, and these bearings should never be removed from the armature shaft except it be desired to install a new bearing. Therefore, after having removed the hexagon nuts and the outside cover, using a copper punch and hammer, gently drive the studs inward to loosen the inside cover. Having done this, remove bolts 4, P. 1 (four of them), whereupon you may pull away end bearing bracket 2, P. 1.
NO. 8.— TO REMOVE THE BALL BEARING at the A. C. end of the armature, follow Instruction No. 7. Having done so you will see on the end of the shaft a nut having in its edge a saw kerf, and in its face the head of a machine screw. This screw acts as a lock nut by compressing the edges of the nut where the saw kerf is made, thus locking the threads to the shaft. Loosen it and remove the nut, which has a right-hand thread. This will release the ball bearing, which may be pulled out. When installing the new ball bearing or replacing the old one, be sure and get it on the shaft straight or "square." If you attempt to put it on a slant it won't go, but if started on just right will slip on easily. Having it in place, set up the lock nut as tight as you can get it, and then set up the screw in its face, thus locking the nut to the shaft. In replacing end bearing bracket 2, P. 1, proceed carefully, and don't try to force it on over the ball