UnionSpecial 56500R Adjusting Instructions

Contents

11SYNCHRONIZING LOOPER AND NEEDLE MOTIONS (CONT.)Turn handwheel in operating direction until looper isat the extreme right end of its travel. Check locationof the center-line of right looper connecting rodbearing using gauge TT35. Place hole in gauge (B,Fig. 6) over threaded stud (A). The left end of gaugeshould locate against the RIGHT side of looperrocker cone (C). If adjustment is necessary, loosenclamp screw (D), reposition looper driver lever (E) asrequired and retighten screw (D). If a gauge is notavailable, the setting can be checked with a scale."X" dimension is from centerline of stud (A) tocenterline of cone (C) which should be 4 1/16 inch(103.2mm).CAUTION: After adjusting the looper gauge and looper avoid, there should be shake at both endpoints of the looper connecting rod while rotating handwheel a full 360o (H, Fig. 6). If bind occurrsloosen nuts (D and E, Fig. 7) and reposition strap (H). Retighten nuts.LOOPER SETTINGSInsert a new needle, type and size as specified. Using the 1/8 inch(3.2mm) looper gauge, set the looper (A, Fig. 7) so the distance fromthe center of the needle (B) to the point of the looper is 1/8 inch(3.2mm), when the looper is at its farthest position to the right.Looper gauge No. 21225-1/8 (C) can be used advantageously inmaking this adjustment. On two needle machines set the back looperto the right needle and on three needle machines set the middlelooper to the middle needle, when setting the looper gauge. Thechart on the following page indicates needle Type, looper gaugesetting and looper gauge number. if adjustment is required, loosennut (D) (it has a left hand thread) and nut (E) on connecting rod (F),turn the connecting rod forward or backward to obtain the 1/8 inch(3.2mm) dimension. Retighten both nuts, first nut (E), then nut (D).Make sure the left ball joint is in vertical position and does not bindafter adjustment.