UnionSpecial 63900 Adjustment Manual

Also see for 63900 Series: Instructions for adjusting and operating

Contents

UnionSpecial 63900 Adjustment Manual Manual pdf 6 page image

IDENTIFICATION OF MACHINESEach UNION SPECIAL machine is identified by a style number, which is stamped into the style plate affixedto the middle of the machine under the tension assembly. The serial number is stamped into the serialnumber plate affixed to the right rear base of the machine.CLASS DESCRIPTIONHigh speed streamlined long arm needle feed lockstitch machines. one needle, light, medium and heavyduty, continuous running roller feed, rotary hook, horizontal hook shaft, gears for changing stitch length, slotsegment for adjusting needle feed, 1 1/4 inch needle bar travel, one reservoir enclosed automaticlubrication system, head oil siphon, adjustable hook oil control, needle bearing for take-up lever and needlebar driving link, needle feed timing on upper shaft, maximum work space to right of needle bar 8 inches.STYLE OF MACHINES63900AM For making 3/8 on 1/2 inch turned down hem on legs of overalls, coveralls, and dungarees.Seam Specification 301-EFb-1 inverted, Specify size of hem. Maximum recommended speed5200 R.P.M.63900AML Same as 63900AM except includes a hook with 52% greater bobbin capacity to reducefrequency of bobbin changes.63900AT For making a 1/2 or 2 1/2 inch hem turned by hand on children's wear, men's dress pants,semi-dress pants and work pants. Sewn when garment reaches machine inside out. SeamSpecification 301EFb-1 or EFa-1. Maximum recommended speed 5200 R.P.M.63900AW For top stitching waistbands on twill and woolen pants. Machine equipped to sew over beltloops. Fitted with cloth plate extension. Seam Specification 301-SSa-1. Maximum recom-mended speed 5200 R.P.M.63900AAE Same as Style 63900AW, except fitted with spring guide keel on presser foot in line withcenterline of needle hole.ILLUSTRATIONSThis manual has been arranged to simplify ordering repair parts. Exploded views of various sections of themechanism are shown so that the parts may be seen in their actual position in the machine. On the pageopposite the illustration will be found a listing of the parts with their part numbers, description and thenumber of pieces required in the particular view being shown.Numbers in the first column are reference numbers only, and merely indicate the position of the part in theillustration. The reference number should never be used in ordering parts. Always use the part number listedin the second column.Component parts of sub-assemblies which can be furnished for repairs are indicated by indenting theirdescriptions under the description of the main sub-assembly. As an example refer to the following text.18. 29126EL Needle Feed Driving Eccentric and Connecting Rod Assembly ................................. 119. 22894J Set Screw .................................................................................................................. 26