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Timing the 111 W Class Sewing Machines
Figure 9-27.Base of machine, showing oiling points

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in the feed dog with a distance of 17/32 inch between the needle bar and the presser bar. In centering the feeding action, the following sequence should be followed: Hold the needle centered in the feed dog with a 17/32-inchspace between the needle bar and presser bar. Tighten the feed driving crank and feed driving rockshaft crank pinch screws, making sure that the crank is flush with the end of the feed driving rockshaft and parallel with the bed. Next, tighten the needle bar rock frame rockshaft crank pinch screw in the back of the uprise. The shank of the presser foot is 17/32 inch wide and may be used for measuring the space. The next step is to set the sewing hook to or from the needle. This is done by moving the hook saddle left or right as necessary; the hook should pass the needle as closely as possible without touching. When this is done, retighten the hook saddle screws. Next, set the sewing hook with the needle. With the needle bar on the upstroke, the lower timing mark on the needle bar should be just visible at the base of the needle bar rock frame. Set the point of the sewing hook in the center of the needle 1/16 inch above the eye. To advance the sewing hook, move the hook drive gear to the right; and to retard, move the hook drive gear to the left. NOTE: The first screw in the hook pinion gear and the second screw in the hook drive gear are splined screws. The hook drive gear must be centered in relation to the sewing hook shaft at the bottom of the hook saddle. “ Lubrication of The Class 111 Sewing Machines Figures 9-24A, 9-25B, and 9-26 show the various lubrication points on class 111 sewing machines. Oiling points are indicated by the unnumbered arrows. Familiarization with the nomenclature of the machines may also be accomplished by studying these illustrations. To lubricate the class 111 machine, swing back the top cover and oil the bearings, then replace the cover. Loosen the thumbscrew in the upper end of the faceplate, turn the faceplate upward, and oil the wick and bearings, as shown in figure 9-25B. After oiling, turn down the faceplate and tighten the thumbscrew. Turn the machine back on its hinges and apply oil at the places designated by the arrows in figure 9-27. All contacting parts on the bottomside of the machine should also be oiled. To lubricate the hook, remove the bed slide and place oil in the oil well (fig. 9-26). This Figure 9-26.—Rear of machine, showing oiling points. 9-22







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