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588 MOTION PICTURE HANDBOOK
No. 30. — Lower Roller Bracket, 19306, P. 1, is removed by loosening screw 2794, P. 1. In putting the bracket back insert the shaft in the hole, and let the bracket lie on the sprocket as you tighten up screw 2794, tight. If at any time the tension on this bracket is not sufficient it is likely this screw has loosened and is allowing the shaft to revolve somewhat. Remedy: Tighten the screw.
No. 31.— Lower Roller Idler, 17949, P. 1 (body), and 17950, P. 1 (end), may be removed by loosening the tiny set screw in center of 17949 and slipping the shaft out.
No. 32.— Lower Sprocket Shaft, 16589, P. 1, may be slipped out to the right after you have followed Instruction No. 15, loosened set screws in the hub of lower sprocket and in the hub of chain sprocket 16814, P. 3. In replacing, slip the shaft in with the sprocket loose, and center it by closing idler roller bracket 19306, P. 1, so that roller, 17949, P. 1, fits between the flanges of the sprocket. Tighten up the set screw in the hub of the sprocket, with the sprocket in this position, and you will be all right.
No. 33. — Casting, 18611, P. 1, carrying lower sprocket shaft 16589, P. 1, the lower sprocket and its driving gear, together with chain gear 16814, P. 3, may be removed in its entirety by taking out screws 17587 (two of them), P. 1.
No. 34.— Revolving Shutter Shaft, 16593, P. 3, and gear, 16585, P. 1, may be removed by following Instruction No. 26 and loosening set screws 82, P. 3, in the holding collar, first having removed the revolving shutter. This will allow you to slip the shaft and gear out.
No. 35.— To Remove Gear, 19333, P. 1, and its shaft, proceed as follows: Follow Instruction No. 5, next follow Instruction No. 15, and No. 19 and No. 21.
No. 36. — To Remove Gear, 19333, P. 1, remove the two screws in the hub of gear 16588, P. 3. These screws are on the back end of the hub. Next pry off gear 16588, P. 3, and loosen the set screw holding the bushings. This set screw may be seen in the side of the casting just above the line leading to arrow head 18795, P. 3. Having loosened the set screw, carefully pry off the bushing toward the front, shoving the shaft and gear along with it. As soon as you have the bushing out of its bearing the gear and shaft can be pulled away.
No. 37.— To Remove Revolving Shatter Bracket, 19491, P. 3, first follow Instruction No. 15. Next follow Instruction No. 33. Remove four 'hexagon-headed large screws, one