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MANAGERS AND PROJECTIONISTS 769
carrying the end of shaft 25P, P. 2, extends clear through to the other side, its open end being plugged up with a loosely fitting iron plug. Stick a steel nail or any slim punch through the bushing and drive this plug out. Then the bushing may be driven out from either end and the new one driven in. In driving in the new bushing use nothing but a hardwood punch, and be sure to get it started straight. The new bushing may be driven in from either end and its face must be flush with the casting on the inside end.
INSTRUCTION NO. 19.— Gear 176P, P. 2, and its shaft, gear 163P, P. 2; belt wheel 161P, P. 2; gear 158P, P. 2, and the shaft carrying them may be removed as a unit by first disconnecting the motor and the take up belts 659P and 334P, P. 4, and pulling out the hinge pins 338P and 660P, P. 4, then removing screws 872P, P. 2, and two others in the opposite end of Plate 181P. Next remove screw 152P, P. !, and crank 151P, P. 1, and the taper pin in the shaft behind the hub of the crank. Next loosen screw on the inner end of shaft 455P, P. 1. This screw is on the gate side just/ between sprocket 452P, P. 1, and the casting. Having released the screws, turn down the stripper plate which comes up between the flanges of the sprocket, and then remove sprocket 452P, P. 1, by loosening the screw in the center of its hub and pulling the sprocket off its shaft; also pull off collar which is on the shaft behind sprocket, after loosening two set screws in its hub. This releases the parts. After having raised the framing carriage as far as it will go, grasp plate 181P, P. 2, and pull the whole thing straight out and away.
CAUTION. — In replacing this part be careful when you put the lower sprocket 452P, P. 1, back on the shaft that it centers properly between the flanges of the idler roller 281P, P. 1 (see Instruction No. 55), and that the stripper plate is raised up into position between the flanges of the sprocket, and its holding set screw well tightened.
INSTRUCTION NO. 20.— The method of driving the machine is as follows : When crank driven, gear 158P, P. 2, which is attached to take up belt pulley and to the crank shaft, drives pinion (stock No. 174) which is secured to the lower sprocket shaft 170P, P. 1. This pinion is just inside the plate 181P, P. 2, and does not show. It drives the lower sprocket shaft and gear 176P, P. 2 and 3 which in turn drives the cam shaft pinion 27P, P. 2 and 3.
When the projector is motor driven, motor pulley 625P,