Singer 451k145 Service Manual And Parts List Download Page 4 | Manualshive

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From the library of: Superior Sewing Machine & Supply LLC

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Summary of Contents for 451k145

Page 1: ...45 HIGH SPEED SINGLE NEEDLE LOCK STITCH MACHINES Machine 451K41 THE SINGER MANUFACTURING COMPANY Copyright Under International Copyright Union A Trademork of THE SINGER MANUFACTURING COMPANY Printed i...

Page 2: ...Installation 6 Hook Oil Wick 5 Hook Section 20 Knee Lifter 4 11 Knee Lifter Rod Spring 19 Length of Stitch 3 10 19 Light Fixture Mounting Seat 3 Locking Feed Driving Eccentric 19 Loop Lift 12 Machine...

Page 3: ...h 6 to the inch Needle bar stroke 1 9 64 1 140 inches Presser bar lift capacity of machine 9 32 281 inch Bed dimensions Length 15 11 16 inches Width 7 inches Working space at right of needle 8 inches...

Page 4: ...t stop stud 11 to stop the action of the knee lifter as soon as knee lifter raises presser foot high enough to trip hand lifter on machine Securely tighten clamp ing screw 12 MACHINE HEAD Machine head...

Page 5: ...h hole Wipe off all excess oil from areas of machine that may come in contact with material to be sewn Machines not in use should be kept well oiled clean dry and covered HOOK LUBRICATION Rotary sewin...

Page 6: ...place all parts removed earlier NEEDLES Machines 451K41 and 451K45 LJse SINGER needles Catalogue 1361 88x9 made in Sizes 8 to 14 and 16 to 22 These needles have a nickel finish but may be supplied wit...

Page 7: ...c UPPER THREADING Turn machine pulley away from you until needle is at its highest position Pass thread from unwinder through threading points 1 through 12 in order shown in Fig 12 When you hove becom...

Page 8: ...bobbin winder to stop automatically when bobbin is wound approxi mately 1 16 inch short of bobbin rim TO THREAD BOBBIN CASE Hold bobbin so that thread will unwind in the di rection shown in Fig 16 Ho...

Page 9: ...the factory the needle thread ten sion thumb nut is set to a position for sewing most light and medium threads without adjustment Should this setting be lost the minimum tension at which the machine...

Page 10: ...urn machine pulley until number indicating desired stitch length is opposite mark P Fig 27 on arm and release button Never depress button while machine is running Make certain that button is disengage...

Page 11: ...brasive matter from around hook and from between feed rows on underside of throat plate 4 Make certain that when machine is in operation machine pulley always turns over away from operator 5 Always us...

Page 12: ...or adjustments or installations check fol lowing conditions of machine performance 1 Sample of work currently produced on this ma chine 2 Needle and thread in use See pages 6 and 7 3 Threading See pag...

Page 13: ...ecting stud pinch screw 12 Fig 32 through hole in face plate Move needle bar to correct height and securely tighten screw L2 3 TO SET NEEDLE BAR AT CORRECT HEIGHT WITHOUT USE OF TIMING MARK when needl...

Page 14: ...qual to about the thickness of a piece of note paper Hook body should always be located on the shaft by pressing it all the way on the shaft When it is necessary to move hook sidewise in rela tion to...

Page 15: ...Removea slight amount of metal from needle guard by using a 1 8 inch strip of very fine emery cloth about 320 holding one end of the emery cloth in a vise and rubbing edge of needle guard along strip...

Page 16: ...with spring at 2 o clock as shown in Fig 44 TENSION VARIATIONS The required tension on check spring may vary de pending upon the thread and material used Heavier thread and bulkier material require mo...

Page 17: ...ser foot is raised with presser bar lifting lever there should be a clearance between presser foot and throat plate 9 32 inch for Machines 451K4I and 451K45 5 16 inch for Machine 451K145 2 When presse...

Page 18: ...be regular and smooth for maximum efficiency Re time sewing hook as instructed on page 14 TO ELIMINATE PUCKERING OF MATERIAL Advance feed timing very slightly TO CENTRALIZE FEED DOG IN THROAT PLATE S...

Page 19: ...n eccentric body Securely tighten the two locking screws R3 TO PREVENT UNAUTHORIZED CHANGE OF STITCH LENGTH Tighten adjusting socket screws S3 Fig 51 firmly and securely tighten locking screws R3 Fig...

Page 20: ...Loosen two screws D Fig 54 in hub of hook Turn machine pulley over away from you until feed bar G3 Fig 55 is raised to its highest point Turn sewing hook until thread guard F3 is at the bottom as show...

Page 21: ...bushing assembly in machine so that set screw J Fig 56 will bear upon spline on bot tom of bushing K Make certain bushing K seats all the way in casting gear E4 meshing with its mate then securely ti...

Page 22: ...Fig 59 with its gasket and securely fasten with six screws J4 Fig 59 Fill oil reservoir as instructed on page 4 THE ARM SHAFT CONNECTION BELT REMOVAL Remove needle to ovoid damaging it while arm and...

Page 23: ...ould be forced onto shaft until it rests against oiling felt flange being careful not to crush flange Slip arm shaft Y4 with needle bar crank R4 Fig 63 into machine at needle bar end as shown in Fig 6...

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