SEWING MACHINE - SINGLE NEEDLE 03914 ASSEMBLY AND OPERATING INSTRUCTIONS 3491 Mission Oaks Blvd., Camarillo, CA 93011 Visit our Web site at http://www.harborfreight.com Copyright © 2003 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.
Specifications ITEM DESCRIPTION Machine Type Heavy duty, industrial sewing machine; high speed, single needle-lock stitch Drive V-belt driven Action Foot pedal operation, along with a knee and manual lifting arm for presser foot. Presser tension adjustment Sewing Thickness 5/16 inch maximum Feed Type Link style needle feed reduces slippage Sewing Directions Forward and reverse feed Stitching Speed 5500 Stitches per minute Motor Type Clutch motor; 3450 RPM, 5.
5. Use the right product for the job. Do 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 do not use this product for a purpose for which it was not intended. 6. Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving parts.
17. Use proper size and type extension cord. If an extension cord is required, it must be of the proper size and type 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.
Sewing Machine Table Stand and Top (not provided) Power Switch Motor Knee Lifting Arm for Presser Foot Assembly The assembly instructions describe mounting the Single-Needle Sewing Machine (Model 03914) to the Table Stand (Model 03929), not included. In order to complete this procedure, you must first purchase and assemble the Table Stand Kit (Model 03929). 1. Locate four corner rests in the rectangular hole of the Table Stand where the machine will sit. 2.
. Fit the machine head to the table rubber hinges (F) before placing the machine head on the corner seats. See figure 4. 7. Tilt the machine back to expose the Oil Pan (D). See figure 5. 8. Fill the Oil Pan with sewing machine lubrication oil (#7 white oil) to the “high” mark “A”. Add more oil when the level is to the “low” mark “B”. After lubrication, and during operation, oil splashing can be seen through the Oil Sight Window (H). 9. Lower the machine head to the table top. 10.
13. Mount the Power Switch under the table top, on the operator’s side. Use the supplied hardware. Power Switch Mounting the Thread Stand Note: The Thread Stand is designed to be mounted on the Table Stand Kit (Model 03929-not included). Unless indicated otherwise, all parts referred to in this set of instructions are listed in the Bobbin Winder & Thread Stand Unit Parts List found on page 28. During assembly, it will be helpful to refer to that list and the diagram that follows it on page 29. 14.
Mounting the Bobbin Winder Note: Unless indicated otherwise, all par ts referred to in this set of instructions are listed in the Bobbin Winder & Thread Stand Unit Parts List found on page 28. During assembly, it will be helpful to refer to that list and the diagram that follows it on page 29. 20. Remove the Belt Cover (part 4, on page 27). Swing the sewing machine so the base is in the operating position, resting on the table. Set the Bobbin Winder to the ‘ON’ Position-see ON Position, below. 21.
ON Position This position is with the Connecting Rod (6) pressed, as shown in Figure C. The Bobbin Winder will put pressure on the belt and cause the machine to operate. The Shaft on the Bobbin Winder will also spin; winding thread onto the Bobbin, if the Winder is set up to do so. Figure C 6 Winding Thread Onto the Bobbin 1. Place a Bobbin onto the Bobbin Winder Shaft (5) as shown at point d in Figure C, right. 2.
Threading the Machine Head Set the thread spool on its holder and guide the thread through the machine as illustrated below. The numbers in the illustration indicate the threading sequence. Adjusting the Stitch Length 1. To increase the stitch length, turn the Stitch Length Dial (1) to the desired number (in millimeters) as indicated under the scale dot (A) on the machine. 2. To decrease the stitch length, turn the Stitch Length Dial (1), while pressing the Feed Lever (2).
Changing the Thread Take-up Spring Stroke and Pressure 1. Loosen Set Screw (2). 2. To increase the stroke, turn the Tension Knob Screw (3) clockwise (A). 3. To decrease the stroke, turn the Tension Knob Screw (3) counterclockwise (B). 4. Loosen Set Screw (2) and pull out the Tension Arm (5). 5. Loosen Set Screw (4) and remove the Tension Knob Screw (3). 6. Turn the Tension Knob Screw (3) clockwise (A) to increase pressure; or turn counterclockwise (B) to decrease pressure. 7.
3. To delay the feed timing in order to increase stitch tightness, move the Feed Eccentric Cam down (counterclockwise). Adjusting the Height of the Feed Dog The Feed Dog is factory adjusted so that it juts out from the Throat Plate surface 0.8 mm to 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: 1. Loosen Screw (2) of Crank (1). 2. Move the Feed Bar up or down to make the adjustment. 3.
Adjusting the Presser Bar Height 1. Loosen Set Screw (1) and manually adjust the Presser Bar height, and the angle of the Presser Foot. 2. After adjusting, securely tighten the Set Screw (1). Adjusting the Thread Take-up Stroke 1. When sewing heavy weight materials, move the Thread Guide (1) to the left (A) to increase the length of thread pulled out by the Thread Take-up. 2.
ARM BED PARTS LIST Ref. No. Part No. SKU 03914 Description Page 14 Amt. Req.
ARM BED ASSEMBLY DRAWING NOTE: When ordering parts from the following lists, always include the list title, item number and description, and page number. For example, to order the first part from page 14 list, you would state: - Arm Bed Parts List - Item #1 - Arm Bed Assembly - Page: 14 NOTE: Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts.
MAIN SHAFT THREAD TAKE-UP PARTS LIST Ref. No. SKU 03914 Part No. Description Page 16 Amt. Req.
MAIN SHAFT THREAD TAKE-UP ASSEMBLY DRAWING SKU 03914 Page 17
FABRIC--PIERCING HOOK DRIVING PARTS LIST Ref. No. SKU 03914 Part No. Description Page 18 Amt. Req.
FABRIC--PIERCING HOOK DRIVING ASSEMBLY DRAWING SKU 03914 Page 19
PRESSER BAR PARTS LIST Ref. No. SKU 03914 Part No. Description Page 20 Amt. Req.
PRESSER BAR ASSEMBLY DRAWING SKU 03914 Page 21
FEED MECHANISM PARTS LIST Ref. No. SKU 03914 Part No. Description Page 22 Amt. Req.
FEED MECHANISM ASSEMBLY DRAWING SKU 03914 Page 23
LUBRICATION PARTS LIST Ref. No. SKU 03914 Part No. Description Page 24 Amt. Req.
LUBRICATION ASSEMBLY DRAWING SKU 03914 Page 25
OIL RESERVOIR & KNEE LIFTER ASSEMBLY DRAWING AND PARTS LIST Ref. No. Part No. SKU 03914 Description Page 26 Amt. Req.
MACHINE HEAD ACCESSORIES PARTS LIST AND ASSEMBLY DRAWING Ref. No. SKU 03914 Part No. Description Page 27 Amt. Req.
BOBBIN WINDER & THREAD STAND UNIT PARTS LIST Ref. No. SKU 03914 Part No. Description Page 28 Amt. Req.
BOBBIN WINDER & THREAD STAND UNIT ASSEMBLY DRAWING SKU 03914 Page 29 REV 03/04
