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FOR MANAGERS AND OPERATORS 535
taking out the screw in its hub and pulling the sprocket off the shaft, first having raised the idler bracket. If it is desired to remove its spindle, 52 A, P. 2, which carries take-up belt driving pulley, 20, P. 2, it will first be necessary to follow Instruction No. 23. Having done so you will see, down in a pocket inside the frame casting, gear 17 A, P. 3, which drives the lower sprocket shaft. Loosen the set screw ir its hub, backing it off a considerable distance, as it is deeply countersunk into the shaft, and you can pull the driving pulley and spindle out to the left. In replacing same be sure you get set screw which holds gear 17 A, P. 3, properly located in the countersink in the shaft, and set it up tight, because if this set screw works loose it will be a job to get at it and retighten.
No. 15. Lower Sprocket Idler Bracket, 25 A, P. 4, may be removed by loosening the screw in the upper end of spring 274, P. 4, and screw 249, P. 4, and screw 227, P. 4. In replacing same be sure to tighten up screw 227, P. 4, and the one on top of spring 274, and to readjust screw 249, P. 4, so that the spring has the proper tension. Lower idler roller, 108 A, P. 4, is merely a guide roller and sets approximately one-eighth of an inch from the sprocket. The other two rollers should, however, be adjusted by means of screw 241^4 and lock nut 241, P. 4, as per General Instruction No. 12. Any of these idler rollers may be removed from their spindle by taking out the screw in the end thereof, but it will be necessary to take off the entire bracket in order to get the center roller off.
No. 16. Gear Bridge, 4 A, P. 3, may be removed by taking out screws 224 A (three of them), P. 2. Back these screws out for about one-half inch and then, using a screwdriver, carefully pry the bridge away. The holding screws are "necked," in order that they may be left in the bridge to avoid the possibility of becoming lost. When you have backed them off for about one-quarter inch they will release the main casting, though they are still attached to the bridge. In replacing the bridge be sure that you get the end of the spindle carrying gear 84, P. 3, properly entered in its bearing and also that shaft 50 D, fly wheel shaft 61 P, and the pin entering spindle 65, all P. 3, are properly entered, and that the locating pins enter their proper receptacles. Do not attempt to drive the bridge on. If you start it right it will enter without any trouble, and all that will, in any event, be necessary, will be to tap the casting lightly with the handle of the screwdriver immediately over each of the two locating pins.