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MANAGERS AND PROJECTIONISTS 719
To replace this cam is merely the process before described in reverse, but attention must be given the matter of tightening ring R-133-A, P.l, which must be screwed in far enough to eliminate any possibility of lost motion between the casing and its holding ring, but not tight enough to cause binding during the process of framing the picture.
INSTRUCTION NO. 20.— REMOVING AUTOMATIC FIRE SHUTTER LEVER E-7, P.I.— Unscrew stud S-514-C, P.3, used to raise the shutter. Remove lever screw, S-100-E, P.l, which is immediately over knob S-134-E, P.2, with which the gate is shoved open, and remove screw S-102-E, P.l. When this latter screw is out the fire shutter will drop down and the lever may be pulled out to the right.
NOTE. — If it be an old type mechanism there will be a set-screw instead of the lifting stud, which may be removed after taking off C-151-D, P.6.
INSTRUCTION NO. 21.— TO REMOVE AUTOMATIC FIRE SHUTTER E-8, P.l.— Remove link retaining screw S-102-E, P.L, which is the screw by means of which the link at top of shutter attaches to lifting lever. Next remove entire lateral guide roller unit, as per Instruction No. 22, whereupon you may lift the shutter out.
INSTRUCTION NO. 22. TO REMOVE LATERAL GUIDE ROLLER UNIT S-292-E, P.l.— To remove this or any one of its parts, loosen the set screw in its left hand hub and the screw in collar at opposite end. You may then pull shaft out to right, starting it out by prying against its left hand end with a screw-driver blade. The removal of the shaft releases all the parts.
CAUTION. — Before disturbing the unit examine it carefully and be sure you understand how the parts go. There are six of them, viz : a shaft, collar, spacing bushing, two rollers and a coil spring. This guide helps in holding the film central over aperature, hence disturbing the position of any of its parts would have a serious effect.
IMPORTANT NOTE.— The foregoing applies to all but the later projectors. With the later Simplex mechanisms you should release the screw holding the pivot on the right side — the side which is toward the glass door — pull out the pivot and remove the roller unit complete.
CAUTION. — In replacing the unit, be sure that it runs freely on the shaft, without binding and without end play.
INSTRUCTION NO. 23.— TO REMOVE GOVERNOR LIFT LEVER D-2, P.4. — It is only necessary to take out the screw in its right hand end, which joins it to the vertical link, and the fulcrum screw S-150-D, P.4. You may then life the part away.
INSTRUCTION NO. 24.— TO REMOVE FRAMING SLIDE LEVER L-107-G, P.3.— See Instructions Nos. 13 and 17.