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552 HANDBOOK OF PROJECTION FOR
The second arc may be put into operation in exacJy the same manner, since they are in multiple, with ballast resistance, hence to all intents and purposes are operated entirely independent of each other. Either arc may be cut off without interfering with the other. To do so merely open the projector table switch.
Note. — During the first two hours of operation the Actodector heats up gradually to its normal operating temperature, which may necessitate a slight readjustment of the field resistance. This must be done with one lamp burning.
LUBRICANT. — The manufacturer recommends Texaco No. OO, Standard Oil Superba No. 57, or that you use Alemite or some equivalent grease for ball bearings. Twenty-five ampere Actodector ball bearings should not be lubricated too often or too liberally. Once a month in normal operation is quite sufficient. After the first month of operation, and thereafter every six months, all bearings should be cleaned out, flushed thoroughly with kerosene, rinsed with clean oil and given fresh lubricant.
Machines equipped with sleeve bearings should be oiled with a good grade of light engine oil. Never fill oil wells when machine is running. Every six months wash all bearings out thoroughly and fill with fresh oil.
IN ORDERING BRUSHES, always place number of machine found on name plate — on order. Order brushes from your dealer.
REMOVING ARMATURE.— Should it become necessary to remove armature, first remove all brushes from brush holders. Remove the screws holding the two bearing housings to the brackets. Remove the four nuts holding the motor end bracket. Remove motor (bracket. Remove motor frame, permitting spacing ring between motor and generator to remain in place. You may then readily remove the armature, but be very careful that you do not bruise its windings, or lay them down on anything which can injure them. The replacement of the armature is, of course, merely a reversal of the process just described.
TO INSTALL NEW BALL BEARINGS, remove the armature as per previous instructions. Unscrew the lock nuts from its shaft, whereupon the bearings may be removed. In installing the new bearings, be very certain that the bearings and oil retaining rings are replaced precisely as the old ones