Harbor Freight Tools 3914 User's Manual
Contents
1. Main Shaft 32b Slot in Tabletop for belt Figure 7 Bobbin Winder Assembly 3 Slide the Sewing Machine Hand Wheel 7b onto the Main Shaft 32b of the Sewing Machine Align one of the Set Screw holes on the side of the Pulley with the flat section of the Main Shaft Tighten the Set Screws 8b enough to hold the Pulley in place but not fully tightened Back of Sewing Machine Slot with Pulley Belt Carriage Bolts 70j flush with Tabletop Back of Tabletop Figure 8 4 Using a rubber mallet sold separately tap the three Carriage Bolts 70j into the top of the Tabletop so that they are flush with the tabletop REV 04c 07g 10b SKU 3914 lll Figure 9 Carriage Bolts 70j Flat Washer 69 Spring Washer 68j Nut 67j IN P Mount the Motor to the underside of the tabletop using the Carriage Bolts 70j Flat Washers 69j Spring Washers 68j and Nuts 67j Finger tighten only Aligning the Pulleys Belt 71j Set Screw 7j Figure 10 Place the Belt 71j around the Sewing Machine Hand Wheel 7b through the slot in the table top and around the motor Pulley 8j Make sure the motor pulley is in line with the Sewing Machine Hand Wheel If you cannot get the Pulleys to line up by sliding them slightly in either direction you may need to turn the Motor Pulley around To do this loosen the Set Screw 7j on the motor Pulley slide the Pulle2. o g I 12 Ha Servo motor Slower replacement for stock motor not shown optional m 400a EH Thread Tension Disc 8 Note When ordering parts for this component use the suffix Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts 22 For technical questions please call 1 800 444 3353 SKU 3914 A ARM BED ASSEMBLY DRAWING Motor DOL 12 Ha Not Shown M Page 23 For technical questions please call 1 800 444 3353 SKU 3914 B MAIN SHAFT PARTS LIST Description 6b ThreadTake upleverlink 1 8b SeScew 2 9b SealngRing 1 Sub assembly Description Qty 18b 2 owe 2 Thread Take up Crank EE ell ER Sub assembly 28b RubberBushing 1 2 ore _ 30b MainShaftFet 1 4 Main Shaft Front Bushing Sub assembly Ba 2 34b End Bolt left hand EM Note When ordering parts for this component use the suffix b Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts Page 24 For technical questions please call 1 800 444 3353 REV 10b SKU 3914 REV 10b B MAIN SHAFT ASSEMBLY DRAWING SKU 3914 For technical ques
3. Bearing6202 n Clutch Sleeve 1 CiutchShat tT FlatRubberWasher 1 Clutch Plate tT fLookNut_ Flat Washer 14 BotM x10 st Clutch Cork 1 Round Spring Plate 1 Flywheel 1 FanBlade tt FlatWashero6 n Spring 11 BotM x10 dt Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts REV 10b Page 38 For technical questions please call 1 800 444 3353 SKU 3914 J MOTOR ASSEMBLY DRAWING Page 39 For technical questions please call 1 800 444 3353 SKU 3914 LIMITED 90 DAY WARRANTY Harbor Freight Tools Co makes every effort to assure that its products meet high quality and durability standards and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase This warranty does not apply to damage due directly or indirectly to misuse abuse negligence or accidents repairs or alterations outside our facilities criminal activity improper installation normal wear and tear or to lack of maintenance We shall in no event be liable for death injuries to persons or property or for incidental contingent special or consequential damages arising from the use of our product Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation of exclusion may not apply to
4. Machine Rest Pin 19h hole Pre drilled ers mounting holes Sewing Machine Opening Pulley Belt Slot Front of Tabletop Possible ON OFF Control Box location 12 Figure 14 Place the Washer 37i onto the Lower Spool Rest Rod 36i and insert the Rod into the Thread Stand Hole in the far right back corner of the tabletop see above Place another Washer 37i over the end of the Rod and thread on and tighten a Nut 38i REV 04c 05d 10b SKU 3914 For technical questions please call 1 800 444 3353 If needed bend the Spool Support 46i so it slides easily over the Lower Spool Rest Rod 36i then slide it over the Lower Spool Rest Rod about halfway down Insert a Bolt 31i and Nut 47i through the Support Note The Support has tabs that hold onto the corners of the Nut to make tightening easier When assembling place the Nut on the side with these tabs Tighten the Screw Insert the threaded end of the Spool Pin 40i through one of the holes in the top of the arm of the Spool Support 46i Place a Washer 32i and Nut 35i over the end of the Pin and tighten Place the Spool Rest 41i Spool Mat 42i and the Spool Vibration Stopper 39i over the end of the Spool Pin Repeat this step for both of the Spool Pins 40i Place the Column Pipe Connector 33i over the top of the Lower Spool Rest Rod 36i until the Rod is about halfway through the Connector Place a Bolt 34i
5. and Nut 35i through the bottom hole in the Connector and finger tighten Place the Upper Spool Rest Rod 30i into the top of the Column Pipe Connector 33i Place a Bolt 34i and Nut 35i through the top hole in the Connector Tighten all of the Screws and Nuts in the Connector Remove the Column Cap 29i from the top of the Upper Spool Rest Rod 30i If needed bend open the Thread Hanger 28i so it slides easily over the Upper Spool Rest Rod Slide the Thread Hanger about halfway over the top of the Upper Spool Rest Rod Insert a Bolt 31i and Nut 47i through the Hanger as explained in the note in step 7 above Tighten the Screw and place the Column Page 11 Cap over the end of the Upper Spool Rest Rod Mounting the Bobbin Winder The Bobbin Winder is used to wind thread onto the Bobbin 17h It is mounted so that it contacts the Belt 71j when needed for bobbin winding Note Unless indicated otherwise all parts referred to in this set of instructions are listed in the Bobbin Winder amp Thread Stand Unit Parts List and Diagram During assembly it will be helpful to refer to that list and diagram Set the Bobbin Winder to the ON Position See Bobbin Winder Operation on the following page Un mm m Pilot Holes al Here Figure 15 Make sure the Bobbin Winder is in the ON position Position the Base 1i so that the Wheel 3i lin
6. e 65 EV mg gey i Bobbin Winder Spring i Hinge Bolt 18i Thread Tension Bracket Assembly EB 2Ioe N pool Mat Thread Guide Hole Thread Guide Hole 46i Spool Support 47i Oi Bobbin Winder Tension Disc Collar N Bobbin Winder Frame Pin N i Tension Disc zi Thread Tension Stud Nut c m lt N 99 Note When ordering parts for this component use the suffix Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts REV 10b Page 36 For technical questions please call 1 800 444 3353 SKU 3914 I BOBBIN WINDER amp THREAD STAND UNIT ASSEMBLY DRAWING SKU 3914 For technical questions please call 1 800 444 3353 b aT L ES 4 waar 29 9 30 4 3b 46 31 e 237 e 9 38 Page 37 J MOTOR PARTS LIST 7 Ro j Bolt M6 x 15 1j Bearing Pressing Plate Stator Description Pulley Safety Cover 2j Bolt M5 x 10 Spring Washer 25 Flat Washer 5j Nut M12 Gear Spring Washer 812 Set Screw 5 x 14 8j Pulley EH amp ele 0 A ud j Flat Washer 210 j j 0j Vibration Absorbing Rubber Gasket Table Mount j Nameplate Rivet2x6 Bolt M4 x8 7 j JE 3j ON OFF Control Box Thrust Spring Ring
7. j Cushion Plate 6j Bolt M6 x 20 not shown Spring Washer 28 9j Flat Washer 28 j Carriage Bolt j Belt size 41 not shown 2j Wood Screw not shown 73 Flat Washer not shown Note When ordering parts for this component use the suffix j Inner Cover Bolt 11j Lock Nut M10 ale AYA a Bracket Stop Spring 29 14j Arm Pin 10 x 55 Wing Nut MG Lock Washer Coil Washer Taper Clutch Arm j Adjustment Bolt M6 x 10 j Brake Shoe Bearing 6202 3j Clutch Sleeve j Clutch Shaft Flat Rubber Washer 26j Clutch Plate j Lock Nut Flat Washer 014 29j Bolt M6 x 10 j Clutch Cork Round Spring Plate gt LIN A 2 e N 2 oO Nic N NIN Eg ojojoj o oc JM 0 24 ale ele oO 2j Flywheel Blade Flat Washer 26 5j Spring Washer 26 36j Bolt M6 x 10 Co w EH ce Co N lt Description Qty Pulley SafetyCover 1 BotM5 x10 1 Spring Washer 5 11 Flat Washer 1 1 Gear Spring Washer 012 1 SetScrew5x14 1 Pulley HmerCover 1 Bot f LockNutMiO tT Brackett Stop Springo9 tT ArmPin10x55 1 JWingNutM6 tt tock Washer tT Col Washer 1 Tapert fClutchArm 1 Adjustment Bot M6 x10 1 BrakeShoe 1
8. machine Pins n following the steps and photos below Note There are two Spool Pins 40i The left Pin is commonly used to hold the spool of thread for the top thread the thread that passes through the top section of the machine while the right Pin is used to hold the spool of thread that is used for winding the bobbin Thread Tension Discs 27a Thread Take up Cover 17a Thread Take up z Eyelet 1b Faceplate Thread Guide 34a EU FO 3 Hole Thread Eyelet 31a Thread Release Finger 31d Take up Spring Wire Needle Bar Thread Guide 26c Needle Bar Thread Guide 24c Foot 9d Figure 25 REV 10b SKU 3914 For technical questions please call 1 800 444 3353 40 S nw Figure 24 Pass the thread between the two Thread Tension Discs 27a on the top of the machine Pass the thread up through the right eyelet then down through the left eyelet on the 3 Hole Thread Eyelet 31a Pass the thread between the two Thread Tension Discs 7a pulling to the right until the thread catches in the Take up Spring 9a Then pass under the Thread Release Finger 31d and behind the Thread Guide 35a Pass behind the Thread Take up Cover 17a through the Thread Take up Eyelet 1b from right to left and down through the Faceplate Thread Guide 34a Pass the thread into the Wire Needle Bar Thread Guide 2 through the hole in the Needle Bar Thread Guide 2
9. nee Press Plate es ORng EE nee Lifter Tube Holder EN Pag Nt nee Lifter os lew 109 ubber Pad ubber Cushion 2 5 5 amp 5 amp v 12g Knee Press Shaft 8 13g Rubber Joint Note When ordering parts for this component use the suffix 0 Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts REV 10b Page 34 For technical questions please call 1 800 444 3353 SKU 3914 ACCESSORIES PARTS LIST AND ASSEMBLY DRAWING Hinge Cushion 10h Note When ordering parts for this component use the suffix h Note Some parts are listed and shown for illustration purposes only and are not available REV agin dividually as replacement parts SKU 3914 For technical questions please call 1 800 444 3353 Page 35 BOBBIN WINDER amp THREAD STAND UNIT PARTS LIST 26 27i Washer i Upper Spool Rest Rod Column Pipe Connector Lower Spool Rest Rod i Washer i Spool Pin Spool Rest S N e i Base i Thread Winder Base Assembly ep N eo N 5i Bobbin Winder Shaft Connecting Rod w 2 i Connecting Rod Pin w N Bobbin Winder Frame Rod 11i Bobbin Winder Frame Pin o e i Ruber 1 Presser U y c
10. point of its stroke 2 Remove and set aside the Rubber Plug 46a Loosen the Bolt 28c Page 18 For technical questions please call 1 800 444 3353 When using a DBX1 needle align to marker line A on the Needle Bar 31c with the bottom end of the Needle Bar Lower Bushing 27 then tighten Bolt 28c When using a DAX1 needle align to marker line B on the Needle Bar 31c with the bottom end of the Needle Bar Lower Bushing 27 then tighten the Bolt 28c When using a DBX1 needle loosen Rotating Hook 20c Set Screws turn the Hand Wheel and align the marker line B on the Needle Bar 31c with the bottom end of the Needle Bar Lower Bushing 27c When using a DAX1 needle align the marker line D on the Needle Bar 31c with the bottom end of the Needle Bar Lower Bushing 276 After making the adjustments in steps 3 and 4 align the Hook Blade Point on the Rotating Hook 20c with the center of the Needle Provide a clearance of 001 to 004 0 04 to 0 1 mm between the Needle and the Hook Blade Point This clearance is less than 1 64 almost touching Securely tighten the Set Screws on the Rotating Hook If the clearance is too small the tip of the Hook Blade Point will be abraded If it is too large it will lead to skipped stitches REV 10b SKU 3914 Adjusting the Presser Bar Height Rubber Plug 37a amp Presser Bar Set Screw 32d Figure 34 1 Remove and se
11. while the Presser Foot stays in the raised or lowered position when using the Presser Foot Lever 2 Turn Tension Adjustment Knob counterclockwise to decrease thread tension REV 10b Page 16 For technical questions please call 1 800 444 3353 SKU 3914 Raises Presser Presser Foot Lever 18d Ei Presser Foot END Figure 29 1 Toraise the Presser Foot turn the Presser Foot Lever up The Presser Foot will go up about 1 4 and stop 2 To lower the Presser Foot turn the Presser Foot Lever down Setting the Presser Foot Pressure Increase Decrease Tension Tension 5 Presser 5 Regulator 20d a SEL m SM 2 Spring Regulator Nut Figure 30 19d 1 Loosen the Presser Spring Regulator Nut 19d by turning it counterclockwise 2 the Presser Regulator 20d clockwise to increase Presser Foot pressure and counterclockwise to decrease Presser Foot pressure 3 After adjustment tighten the Presser Spring Regulator Nut REV 10b SKU 3914 For technical questions please call 1 800 444 3353 ADVANCED SETTINGS The Sewing Machine is set at the factory for using with jean weight materials The following adjustments are needed only when using the machine for unusual types of fabric or when changing machine components These procedures should be performed only by a qualified sewing machine technician Adjusting the Feed Timing St
12. 07a 10b SKU 3914 moderate to slow speeds for the first 15 minutes of use WARNING Shut the machine off completely before working around the needle or other moving parts BASIC SETTINGS You will need to make the following adjustments on a regular basis when using the machine Attaching the Needle The needles supplied with the Sewing Machine are size 90 14 DBX1 The shank is size 16 x 257 For leatherwork use a 16 x 95 needle This machine can accommodate a needle up to size 22 Note Industrial sewing machine needles have a round shank the top part of the needle that slides up into the machine Do not use needles such as most home sewing needles which have a flat area on the shank of the needle 1 Unplug the Power 2 Select the proper needle size for the thread count and material being sewn 3 the Hand Wheel 7b counterclockwise until the Needle Bar reaches the highest point of its stroke Face indented 3 section to right m when inserting Figure 17 Front view Side View needle 4 Loosen the Bolt 25c and hold Needle 23c with its indented part facing to the REV 07a 10b SKU 3914 For technical questions please call 1 800 444 3353 right Insert the Needle and push it up until it will go no farther While holding in place securely tighten the Bolt Bobbin Winder Operation The Bobbin Winder is used to wind thread onto the Bobbin The Bobbin Winder ha
13. 4 through the Needle 23c from left to right under the wire guide and between the opening in the Presser Foot 9d To pull the bobbin thread up to the top of the machine hold the top thread behind the Presser foot and turn the Hand Wheel 7b counterclockwsie until the Needle catches the bobbin thread Page 15 pulling it to the top of the machine Pull Adjusting the Bobbin Thread Tension both threads behind the Presser Foot leaving at least 4 of excess thread Adjusting the Stitch Length Increase Decrease Tension Tension Tension Bobbin Adjustment Case 21c Screw Figure 26 To increase or decrease the stitch length Figure 28 turn the Stitch Length Dial 46e to the desired number in millimeters as indicated at A above 1 Using a small flathead screwdriver sold separately turn the Tension Adjustment Screw on the Bobbin Case 21 Adiustina the Needle Thread Tension clockwise to increase bobbin tension 2 Tum the Tension Adjustment Screw J counterclockwise to decrease bobbin 5 ension Adjustment Knob 3a TL Raising the Presser Foot Fi 27 The Presser Foot 9d be raised 9 and lowered using the Presser Foot 1 Tension Adjustment Knob Lever 18d or the Knee Lifter 219 clockwise to increase thread tension The Knee Lifter raises the Presser Foot momentarily to a height of up to 1 2 as long as it is pushed
14. 9 will sit Place the Rubber Cushions 244 on the operator side corner rests and the Rubber Pads 239 on the hinge side corner rests Secure with two Tacks 25g in each Pad or Cushion Note The Rubber Pads 239 are optional They may be omitted or used under the Rubber Cushions 24g to adjust the tilt REV 07f 10b SKU 3914 For technical questions please call 1 800 444 3353 of the machine depending on the user s preference Hinge Indentations in Tabletop Oil Pan 19 Hinge 1h Figure 3 Seat the Oil Pan 1g on the Rubber Pads and Cushions in the Tabletop opening Insert the Hinge Cushions 2h into the tabletop securing them with two Tacks 25g in each Hinge Cushion Insert the Hinges 1h into the holes in the back of the Sewing Machine Machine Rest Pin 19h 9 Figure 4 Insert the Machine Rest Pin 19h in the hole provided in the table stand Carefully place the machine hinge side first into the Rubber Hinge Plates and over the Oil Pan Page 7 Knee Press Lifter Rod 29 Oil Pan Magnet 74228 Oil Sight Window 1f Hand Wheel 7b Figure 5 7 Tiltthe machine back to expose the Oil Pan 19 Insert the Knee Press Lifter Rod 29 Place the Oil Pan Magnet 229 in the lowest portion of the Oil Pan Fill the Oil Pan with the Oil 20h to the High mark A Add more oil when the level is to the Low mark B After lubrication and during oper
15. CENTRAL MACHINERY SINGLE NEEDLE INDUSTRIAL SEWING MACHINE SET UP AND OPERATING INSTRUCTIONS Visit our website at http www harborfreight com Read this material before using this product Failure to do so can result in serious injury SAVE THIS MANUAL Copyright 2005 by Harbor Freight Tools All rights reserved No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools Diagrams within this manual may not be drawn proportionally Due to continuing improvements actual product may differ slightly from the product described herein Tools required for assembly and service may not be included For technical questions or replacement parts please call 1 800 444 3353 REV 07f 10b SPECIFICATIONS Machine Type Heavy duty industrial sewing machine high speed single needle lock stitch V belt driven size 41 replacement belt Foot pedal operation along with a knee and manual lifting arm for presser foot Feed Type Link style needle feed Sewing Directions Forward and reverse feed 20 9 Lx 10 H 2 Screwdrivers 3 Bobbins Small lubricating bottle with tip Spare needles size 90 14 Power Switch Note Performance of this tool may vary depending on variations in local line voltage Extension cord usage may also affect tool performance Accessories Warning Make certain that the voltage switch on the motor i
16. HOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE BUYER THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO Page 40 For technical questions please call 1 800 444 3353 SKU 3914
17. ISA MOTIJA 3 diria WHOLIOVdV2 134208 Ag 134208 LHDN AZL REV 07g 10b Page 21 For technical questions please call 1 800 444 3353 SKU 3914 ARM BED PARTS LIST Thread Disc Rotation Stopper Thread Tenson Spring IE lt Description ubber Plug Needle Draining Crank ole hree hole Thread Eyelet 30a C2 N ceplate aceplate Sealing Gasket aceplate Thread Guide hread Guide hread Guide Bolt ubber Plug a Thread Tension Spring Thread Release Disc ER 02 Co 9 4 a Thread Tension Disc A Take up Spring Thread Tension Post Socket oO 8a ed Slide Subassembly lide Plate Slide Plate Spring 41a Slide Plate Spring Screw 2a Throat Plate Throat Plate Screw 44a Bed Screw Stud Rubber Plug Thread Take up Lever Link Pin Hole Rubber Plug Brand Plate 8a Brand Plate Rivet 49a Main Shaft Bushing a 51a e N 12 15a 3 IP 2 3 24 25 ES 4 ak NIO 5 EN 9 A NIN Screw Faceplate Thread Retaining Guide Motor Not Shown Subassembly 6a Faceplate Retaining Thread Guide 7 28a Thread Tension Spring 29a Thread Tension Screw
18. KU 3914 E FEED CONTROL ASSEMBLY DRAWING SKU 3914 For technical questions please call 1 800 444 3353 Page 31 F LUBRICATION PARTS LIST Part Description aty Description 4r Oi Pump instaling Base 1 2 Rubbers Oi Pump Brees f 00 UJ il er oiPump screen o E meo T aska EE mee N N o N Co Q NIN BH a 00 o or _ 1 Ex wr Retur Pump Plunger 1 m fs 16 pring EN 7t OilRetumTubeHolder 11 Oil Return Tube Plate 1 il Return Tube Holder EN EN il Return Clamp EN Ring N g gt 00 o 8 gt o w N NY Note When ordering parts for this component use the suffix Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts REV 10b Page 32 For technical questions please call 1 800 444 3353 SKU 3914 LUBRICATION ASSEMBLY DRAWING Page 33 For technical questions please call 1 800 444 3353 SKU 3914 BASE ASSEMBLY DRAWING AND PARTS LIST T nee Press Lifer Crank EX nee Press Plate Rod E nee Press Plate Cover Joint Ea
19. OLT UNPACKING NAMEPLATE EXTENSION CORD am CK CC AMPERES LENGTH When unpacking check to make sure atfullload 25 50 75 100 150 that the parts shown in the photo on the following page are included Note that the machine table shown is not included and 2 1 3 4 18 18 18 16 14 d 35 50 must be ordered separately If any parts are E T missing or broken please call Harbor Freight Y aa to Tools at the number on the cover of this Lacu Te Tue manual as soon as possible 12 1 16 0 14 12 161 200 Based on limiting the line volt TABLE A age drop to five volts at 150 of the rated amperes REV 10b Page 6 For technical questions please call 1 800 444 3353 SKU 3914 Sewing Machine Table Stand and Top not provided Motor Knee Lifting Arm for Presser Foot Figure 1 The assembly instructions describe mounting the Single Needle Sewing Machine Model 2 03914 to the Table Stand Model 03929 not included In order to complete this procedure you must first purchase and assemble the 3 Table Stand Kit Model 03929 Installing the Oil Pan and Sewing Machine to the Tabletop of Industrial Sewing 4 Machine Table SKU 3929 sold separately Oil Pan 14 hole in Tabletop 30 Operator Side of Table Rubber Pads 23g 5 Rubber Cushions 249 Figure 2 6 1 Working in the rectangular hole of the Tabletop where the Oil Pan 1
20. andard Rotating Hook 20c N EE AS a 1 Loosen Set Screws on the side of the Rotating Hook 20c and re position the Rotating Hook as follows Advanced Set Screws Figure 31 a To advance the feed timing in order to prevent uneven material feed rotate the Rotating Hook up clockwise b To delay the feed timing in order to increase stitch tightness rotate the Rotating Hook down counterclockwise 2 Retighten the Set Screws Adjusting Feed Dog Height The Feed Dog is factory adjusted so that it juts out from the Throat Plate surface 031 0 8 mm to 035 0 9 mm If the Feed Dog juts out too much puckering may result when sewing lightweight materials To adjust the height of the Feed Dog Page 17 Feed Lifting Shaft Crank 1e Bolt 2e 0 03 0 033 0 75 0 85 mm 0 037 0 041 0 95 1 05 Feed Bar Body Feed D Subassembly 4e a a b Throat Plate b Figure 32 4 1 Loosen the Bolt 2e of the Feed Lifting Shaft Crank 1e 2 Move the Feed Bar Body Subassembly 4e up or down to make the adjustment 3 Tighten the Bolt 2e being careful not to overtighten Adjusting Needle to hook Timing Rubber Plug 46a amp Bolt 28c Needle Bar Lower Bushing 27 Needle Bar 31c Rotating Figure 33 Hook 20c 1 Turn the Hand Wheel 7b to bring the Needle Bar down to the lowest
21. ation oil splashing can be seen through the Oil Sight Window 1f Tilt the machine head back to the table top Mounting the Motor Note The Motor is heavy You will need a helper to hold the motor in place while tightening the Nuts 67j on the Carriage Bolts 70j in step 5 on the following page Motor Rotation Switch Always keep to right Receptacle for 110 220 V Switch 6 volt work light Always keep to left 110V not included Unless power plug is rewired for 220v by a qualified electrician Figure 6 1 The motor can be set for 110V or 220v Make certain that the voltage switch on the motor is set correctly for your use This machine is set up for 110V usage Set the 110 220V Switch to 110V Switch to the left unless you have your outlet changed to 220V by a qualified electrician Rewiring of the plug and an approriate outlet is required for 220V usage 2 The rotation of the motor can also be set to clockwise or counterclockwise rotation This setting should always be set to the right which makes the sewing machine pulley rotate counterclockwise Do not use this setting to reverse the direction of the machine Use the Reverse Control Lever 226 to reverse the stitch feed direction when sewing REV 03d 03e 07g 10b Page 8 For technical questions please call 1 800 444 3353 SKU 3914 Hand Whee Sewing Machine Belt 71j Set Screws ie 8b ME Oneon each side of the Pulley
22. chnical questions please call 1 800 444 3353 SKU 3914 D PRESSER BAR ASSEMBLY DRAWING SKU 3914 For technical questions please call 1 800 444 3353 Page 29 E FEED CONTROL PARTS LIST e ComecigRod Se RockerSbteRetumBosd RB 7e_ Reverse Crank Subassembly s Bum e Feed Regulator De FeedReguatorSud ComecigRod Feed Drive Sm O Ring He Feed Rocker Shat 4e LoxkPmSpig se tokn Me SetScew SGenlenghDid en se Bot comedngen 49 Set Screw _ 18e Rockers Feed Reverse at 45 4 Co w N olojo g AIR EN EN AYR c 8 59 82e 63e N Oe 24e 27 8 9 306 326 NIN Co R D oja NIN O N NIN oO Note When ordering parts for this component use the suffix e Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts REV 10b Page 30 For technical questions please call 1 800 444 3353 S
23. es up with and just touches the belt Mark pilot hole locations on the table through the center of each of the two channels in the Base as indicated above Set the Base 1i aside and drill pilot holes for each of the two marked locations Reposition the base and secure using two Wood Screws 26i and Page 12 Washers 27i Leave the Screws just loose enough to allow the Base to slide Less than 1 8 gap between Belt 71j and Wheel 3i Belt 711 16 16 Put the Bobbin Winder in the OFF position See Bobbin Winder Operation on the following page Slide the Bobbin Winder Assembly close to the belt until it just barely doesn t touch it 1 8 gap or less as shown above Tighten the Wood Screws 26i securely Installing the Belt Covers i Install the Front Belt Cover 4h over the Sewing Machine Hand Wheel 7b using the Belt Cover Support 11h the Belt Cover Bolts 10h 12h and the Belt Cover Cap 5h To install the Rear Belt Cover 7h align the cover on the Tabletop over the back side of the opening where the Belt 71 enters the tabletop Mark where to drill holes Remove the Rear Belt Cover and drill pilot holes Secure the Rear Belt Cover in place using Wood Screws 9h OPERATION Caution To properly break in your new For technical questions please call 1 800 444 3353 sewing machine and avoid possible damage to the machine sew at REV
24. ide 24c Presser Foot 9d Figure 37 2 When the Presser Foot lift is adjusted over 0 39 inch 10 mm be sure that the Needle Bar Thread Guide 24c does not hit the Presser Foot 9d This can be manually checked by turning the Hand Wheel 7b Page 19 Adjusting Sewing Speed with Pulleys sold separately This machine is a fast running machine It can be adjusted to a slower running machine by changing the pulley on the motor to a smaller diameter pulley Consult a qualified sewing machine repair shop to replace the pulley with a 1 3 4 or 1 1 2 pulley to slow the speed of the machine Page 20 For technical questions please call 1 800 444 3353 MAINTENANCE Advanced Machine adjustments should only be performed by a qualified technician Check the oil level weekly when the machine is used daily Add sewing machine oil as required to the high level marking Clean the machine with a clean damp cloth Do not use solvents or thinners After each use check for lint build up and blow clean with pressurized air Remove and discard any stray thread or fabric pieces Check the Belt 71j tension after first use and then weekly and adjust as described in Adjusting the Belt Tension under the assembly instructions When not in use cover the machine and store in a clean and dry location REV 10b SKU 3914 MOTOR WIRING DIAGRAM ADZZ AOLE HOIYIS HOLIMS ALIHAMA MOT
25. ire a three wire extension cord Double Insulated tools can use either a two or three wire extension cord As the distance from the supply outlet increases you must use a heavier gauge extension cord Using extension cords with inadequately sized wire causes a serious drop in voltage resulting in loss of power and possible tool damage See Table A The smaller the gauge number of the wire the greater the capacity of the cord For example a 14 gauge cord can carry a higher current than a 16 gauge cord See Table A When using more than one extension cord to make up the total length make sure each cord contains at least the minimum wire size required See Table A If you are using one extension cord for more than one tool add the nameplate amperes and use the sum to determine For technical questions please call 1 800 444 3353 Page 5 the required minimum cord size See Symbology Table A 6 If you are using an extension cord outdoors make sure it is marked with the suffix W A W in Canada to indicate it is acceptable for outdoor use 7 Make sure the extension cord is properly wired and in good electrical condition Always replace a damaged extension cord or have it repaired by a qualified electrician before using it 8 Protect the extension cords from sharp no objects excessive heat and damp or RPM wet areas RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS 120 240 V
26. lectrician if you are in doubt as to whether the outlet is properly grounded Do not modify the power cord plug provided with the tool Never remove the grounding prong from the plug Do not use the tool if the power cord or plug is damaged If damaged have it repaired by a service facility before use If the plug will not fit the outlet have a proper outlet installed by a qualified electrician Grounded Tools Tools with Three Prong Plugs VER 3 Prong Plug and Outlet Tools marked with Grounding Required have a three wire cord and three prong grounding plug The plug must be connected to a properly grounded outlet If the tool should electrically malfunction or break down grounding provides a low resistance path to carry electricity away from the user reducing the risk of electric shock See 3 Prong Plug and Outlet REV 10b SKU 3914 The grounding prong in the plug is connected through the green wire inside the cord to the grounding system in the tool The green wire in the cord must be the only wire connected to the tool s grounding system and must never be attached to an electrically live terminal See 3 Prong Plug and Outlet The tool must be plugged into an appropriate outlet properly installed and grounded in accordance with all codes and ordinances The plug and outlet should look like those in the preceding illustration See 3 Prong Plug and Outlet Extension Cords Grounded tools requ
27. lockwise moving the nut down towards the end of the bolt ihg oe a enough so that the motor hangs as low Mus loosen nut 5 Connect the Treadle Joint Assembly separately to the end of the motor Clutch Arm 19j bars using the nut and bolt on the end of then the Joint Assembly tighten Adjust the length He and or location of the components if needed as its weight allows Turn the upper Nut 45j counterclockwise until it tightens against the Motor Housing Flange The proper tension is reached when the Belt can only be pushed in 1 2 inch Test the Belt tension If it needs to be tighter move the lower Nut and push the motor down Tighten in place with the upper Nut Arm Assembly and Treadle Pedal Tabletop 3929 sold separately Figurg 13 05d 07g 10b Page 10 For technical questions please call 1 800 444 3353 SKU 3914 Mounting the Thread Stand T Thread Hanger 28i N Upper Spool e Rest Rod Column Pipe 301 Connector 33i Spool Lower Spool Pins Rest Rod 40i 5 7 Ge Figure 13 Note The Thread Stand is designed to be mounted on the Table Stand Kit Model 03929 sold separately Unless indicated otherwise all parts referred to in this set of instructions are listed in the Bobbin Winder amp Thread Stand Unit Parts List and Diagram During assembly it will be helpful to refer to that list and diagram Back of Tabletop Thread Stand hole
28. of reach of children Use the right product for the job Do Ti not attempt to force a small product or attachment to do the work of a larger industrial tool There are certain applications for which this product was designed It will do the job better and more safely at the rate for which it was intended Do not modify this product and 43 do not use this product for a purpose for which it was not intended Dress properly Do not wear loose clothing or jewelry as they can be caught in moving parts Protective electrically nonconductive clothes and nonskid footwear are recommended when working Wear restrictive hair covering to contain long hair Do not overreach Keep proper footing and balance at all times Do not reach Over or across running machines Maintain tools with care Keep needles sharp and tools clean for better and safer performance Follow instructions for lubricating and changing accessories Inspect tool cords periodically and if damaged have them repaired by a qualified technician The handles must be kept clean dry and free from oil and grease at all times Disconnect power Always turn the machine off and if possible disconnect the power plug of the machine from the receptacle before adjusting repairing or cleaning the machine leaving the machine unattended tilting the machine head or removing the V belt Remove adjusting keys and wrenches Check that keys and adjusting wrenches are remo
29. oper size and type extension cord If an extension cord is required it must be of the proper size and type Page 3 20 21 4 to supply the correct current to the tool without heating up Otherwise the extension cord could melt and catch fire or cause electrical damage to the tool This tool requires use of an extension cord with up to 10 amps capability up to 50 feet with wire size rated at 18 AWG Longer extension cords require larger size wire If you are using the tool outdoors use an extension cord rated for outdoor use signified by WA on the jacket Maintenance For your safety service and maintenance should be performed regularly by a qualified technician People with pacemakers should consult their physician s before use Electromagnetic fields in close proximity to heart pacemaker could cause pacemaker interference or pacemaker failure WARNING The brass components of this product contain lead a chemical known to the State of California to cause birth defects or other reproductive harm California Health amp Safety code S 25249 5 et seq The warnings cautions and instructions discussed in this instruction manual cannot cover all possible conditions and situations that may occur It must be understood by the operator that common sense and caution are factors which cannot be built into this product but must be supplied by the operator Sewing Safety Precautions Keep hand
30. s away from the needle when you turn the power switch on or while the machine is operating For technical questions please call 1 800 444 3353 Do not place your fingers into the thread take up cover while the machine is operating Never leave the machine running and unattended During operation never place your head hair or hands in the proximity of the hand wheel V belt bobbin winder or motor Do not operate the machine with any safety guards removed This machine shall only be operated by appropriately trained operators For your personal protection we recommend you wear ANSI approved safety glasses when using the machine If oil or grease comes in contact with your eyes or skin immediately wash the affected areas and consult a physician Tampering modifying or altering any device aside from the cord and plug by a licensed electrician on the machine is prohibited and will void manufacturer s warranty Repair adjustment and specific maintenance shall only be performed by a qualified service technician Alteration or replacement of the 3 prong grounded electrical plug provided with the machine must only be performed by a licensed electrician This machine must be properly grounded This sewing machine is only to be used for the purpose intended REV 07a 10b SKU 3914 GROUNDING TO PREVENT AWARNING ELECTRIC SHOCK AND DEATH FROM INCORRECT GROUNDING WIRE CONNECTION Check with a qualified e
31. s set correctly for your use See page 6 This machine is set up for 110V usage Rewiring of the plug and an approriate outlet is required for 220V usage This Machine requires oil to be added before use see page 6 for details Save This Manual Read all instructions before using this tool You will need the manual for the safety warnings and precautions assembly 1 Keep work area clean Cluttered areas instructions operating and maintenance invite injuries procedures parts list and diagram Keep your 5 invoice with this manual Write the invoice number on the inside of the front cover Keep the manual and invoice in a safe and dry place for future reference Observe work area conditions Do not use machines or power tools in damp or wet locations Don t expose to rain Keep work area well lighted Do not use electrically powered tools in the presence of flammable gases or liquids SAFETY WARNINGS AND 3 Keep children away Children must PRECAUTIONS never be allowed in the work area Do WARNING When using tool basic not let them handle machines tools or EIER extension cords safety precautions should always be followed to reduce the risk of 4 Store idle equipment When not in use personal injury and damage to tools must be stored in a dry location to equipment REV 03d 03e 04c 10b Page 2 For technical questions please call 1 800 444 3353 SKU 3914 SKU 3914 inhibit rust Always lock up tools and keep out
32. s two positions ON and ORF OFF Position Pull tab on Connecting Rod to disengage Winder we Figure 18 Pull the tab on the Connecting Rod to disengage the Winder from the Belt The Bobbin Winder will not contact the belt ON Position Press here to push Winder toward Belt Figure 19 This position is with the Connecting Rod 6i pressed as shown above The Shaft on the Bobbin Winder will spin winding thread onto the Bobbin Page 13 Figure 20 T Winding Thread Onto the Bobbin Thread Guide Hol 43i Thread from Spool not shown Tension Bobbin 17h Route the Thread from the Spool up through the Thread Guide Hole 43i through the hole in the Thread Tension Bracket 18i then over and under between the Tension Discs 21i Wrap the thread end around the Bobbin 17h overlapping it several times to secure the thread on the bobbin Place the Bobbin onto the Bobbin Winder Shaft 5i with the thread coming from underneath See Figure 20 If needed use the large Screw Driver 14h or a pair of pliers sold separately to open or close the end of the Shaft so the Bobbin is snug enough to turn with the Shaft yet can still be pulled off easily Connecting Rod Figure 21 Turn on power to the Sewing Machine press the Treadle Pedal then the Connecting Rod 6i to engage the Bobbin Winder and
33. t aside the Rubber Plug 37a and loosen the Presser Bar Set Screw 324 2 Manually adjust the Presser Bar height and the angle of the Presser Foot 3 After adjusting securely tighten the Set Screw and replace the Rubber Plug Adiusting the Thread Take up Stroke Thread Take up Thread Guide 35a XN Thread Guide Bolt 36a Normal Setting Figure 35 1 To adjust the thread take up stroke loosen the Thread Guide Bolt 36a and slide the Thread Guide 35a to the right or left as described following a When sewing heavy weight materials move the Thread Guide 35a to the left to increase the length of thread pulled out by the Thread Take up Spring 9a b When sewing lightweight materials move the Thread Guide 35a to the right to decrease the length of thread REV 10b SKU 3914 For technical questions please call 1 800 444 3353 pulled out by the Thread Take up Spring c The normal setting is when the marker on the Thread Guide is aligned with the center of the Bolt 2 Tighten the Thread Guide Bolt after adjusting the Thread Guide Adjusting the Height of the Knee Lifter The standard height of the Presser Foot lifted using the Knee Lifter is 0 39 inch 10 mm Knee Press Lifter Crank 159 Figure 36 1 To adjust the Presser Foot lift up to 0 5 inch 13 mm adjust the Nut 89 placement on the Stud 7g on the Knee Press Lifter Crank 15g Needle Bar Thread Gu
34. tions please call 1 800 444 3353 Page 25 C STITCH DRIVE PARTS LIST Description Rotating Hook Sub assembly 21c 22c 5 gm m 36c Upright Shaft Upper Bushing 20c Rotating Hook 10c Hook Driving Shaft Thrust Collar Hook Driving Shaft Hook Driving Shaft Front Bushing 3 Sub assembly Hook Driving Shaft Front Thrust Collar 17c Oil Wick 18c Hook Driving Shaft Front Bolt Note When ordering parts for this component use the suffix c Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts REV 10b Page 26 For technical questions please call 1 800 444 3353 SKU 3914 C STITCH DRIVE ASSEMBLY DRAWING Page 27 For technical questions please call 1 800 444 3353 SKU 3914 D PRESSER BAR PARTS LIST 188 od Tension Release Lever ifting Lever Presser Rod EN Liting Lever Rear Crank 1 ad UfingleverPresserRod 1 Pressure tever omg E 7a PeserSpig PresserBar iting Lever Shafi Hinge BOK 2 ea Spi od Hinge Bok 14 Thread Release Finger 5 6 32a PesserBarsetSeew 1 168 33d Note When ordering parts for this component use the suffix d Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts REV 10b Page 28 For te
35. ved from 17 For technical questions please call 1 800 444 3353 the machine work surface before plugging it in Avoid unintentional starting Be sure the switch is in the Off position when not in use and before plugging in Stay alert Watch what you are doing use common sense Do not operate when you are tired Check for damaged parts Before using any product any part that appears damaged should be carefully checked to determine that it will operate properly and perform its intended function Check for alignment and binding of moving parts any broken parts or mounting fixtures and any other condition that may affect proper operation Any part that is damaged should be properly repaired or replaced by a qualified technician Do not use if any switch does not turn On and Off properly Guard against electric shock Prevent body contact with grounded surfaces such as pipes radiators ranges and refrigerator enclosures Replacement parts and accessories When servicing use only identical replacement parts Use of any other parts will void the warranty Only use accessories intended for use with this tool Approved accessories are available from Harbor Freight Tools Do not operate tool if under the influence of alcohol or drugs Read warning labels if taking prescription medicine to determine if your judgment or reflexes are impaired while taking drugs If there is any doubt do not operate the tool Use pr
36. wind thread onto the Bobbin When finished release the Connecting Rod the Treadle Pedal and turn off power to the Sewing Machine Cut the thread and remove the Bobbin Page 14 6 For technical questions please call 1 800 444 3353 Setting the Bobbin into the Bobbin Case and into the Machine Figure 22 After filling the Bobbin 22c with thread hold it so that the thread exits to the left and push it into the Bobbin Case 21c Following Figure 22 feed the thread through slit A and pull the thread in direction C By doing so the thread will pass under the tension spring and exit at notch B Verify that the Bobbin rotates in the direction of the arrow when thread C is pulled Pull out at least 4 of thread On the top of the machine rotate the Hand Wheel counterclockwise until the needle is in its topmost position a z Underside of Machine ILU Bobbin Case 21 Figure 23 Holding the Bobbin Case by the hinged latch insert the Bobbin Case into the Rotating Hook 20c from the underside of the machine Release the hinged latch as the Bobbin Case slides into place REV 07a 10b SKU 3914 Threading the Top Thread Thread Hanger 28 Set the spool of thread sold separately onto the top thread Spool Pin 40i the left Spool Pin and thread it through the eyelet directly Spool above on the Thread Hanger 281 Guide the thread through the
37. y off of the motor For technical questions please call 1 800 444 3353 Page 9 and turn it around Move the belt by hand to verify that it is aligned and tracking correctly Caution Do not tighten the Belt so much that the left side of the Sewing Machine begins to lift up from the Oil Pan Once you have the Pulleys aligned 2 the Belt is the proper tension remove the Belt from the Sewing tighten both Nuts against the Motor Machine Hand Wheel 7b and tighten Housing Flange to hold the motor in its Set Screws 8b Replace the Pulley place and tighten the Motor Set Screw 7j 3 Install the Pulley Safety Cover 1j over Attach the Pulley Safety Cover 1j over the motor Pulley 8j using the Bolt 2j Spring Washer 3j Flat Washer 4j and the motor Pulley 8j using the Bolts 2j Flat Washers 4j Spring Washers 3j and Nuts 5j Lock Nut 5j OC u 5j Back of Tabletop Thread Stand hole Machine Rest Pin 19h hole Adiusting the Belt Tension Pre drilled tune b mounting holes a Sewing Machine Opening Pulley Belt Slot ON OFF Control Box shown mounted on right from underside of tabletop 4 Mount the ON OFF Control Box 63j under the Tabletop in one of the locations shown above using the Wood Screws 72 and Flat Washers 73j Figure 12 Figure 11 1 tighten the Belt 71j tension turn the lower Nut 45j on the Belt Adjustment Bolt 48j counterc
38. you THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS To take advantage of this warranty the product or part must be returned to us with transportation charges prepaid Proof of purchase date and an explanation of the complaint must accompany the merchandise If our inspection verifies the defect we will either repair or replace the product at our election or we may elect to refund the purchase price if we cannot readily and quickly provide you with a replacement We will return repaired products at our expense but if we determine there is no defect or that the defect resulted from causes not within the scope of our warranty then you must bear the cost of returning the product This warranty gives you specific legal rights and you may also have other rights which vary from state to state 3491 Mission Oaks Blvd PO Box 6009 Camarillo CA 93011 800 444 3353 PLEASE READ THE FOLLOWING CAREFULLY THE MANUFACTURER AND OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY NEITHER THE MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT IN FACT THE MANUFACTURER AND OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS S
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