Harbor Freight Tools 3914 operating instructions Unpacking, Table a, 25’ 50’ 75’ 100’ 150’

Page 6

the required minimum cord size. (See

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 objects, excessive heat, and damp or wet areas.

RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS* (120/240 VOLT)

NAMEPLATE

EXTENSION CORD

AMPERES

 

LENGTH

 

(at full load)

25’

50’

75’

100’

150’

0 – 2.0

18

18

18

18

16

2.1

– 3.4

18

18

18

16

14

3.5

– 5.0

18

18

16

14

12

5.1

– 7.0

18

16

14

12

12

7.1 – 12.0

18

14

12

10

-

12.1

– 16.0

14

12

10

-

-

16.1

– 20.0

12

10

-

-

-

TABLE A

* Based on limiting the line volt-

age drop to five volts at 150% of

the rated amperes.

 

 

 

 

Symbology

 

 

 

Double Insulated

 

 

 

Canadian Standards Association

 

 

 

Underwriters Laboratories, Inc.

 

 

V~

Volts Alternating Current

A

Amperes

 

 

 

n0 xxxx/min.

No Load Revolutions per Minute

(RPM)

Unpacking

When unpacking, check to make sure that the parts shown in the photo on the following page are included. Note that the machine table shown is not included, and must be ordered separately. If any parts are missing or broken, please call Harbor Freight Tools at the number on the cover of this manual as soon as possible.

 

 

REV 10b

Page 6

For technical questions, please call 1-800-444-3353.

SKU 3914

Image 6 Contents
For technical questions or replacement parts, please call Single needle industrial Sewing Machine Read all instructions before using this Tool Specifications Safety Warnings Precautions Save This ManualFor technical questions, please call Sewing Safety Precautions Grounding Grounded Tools Tools with Three Prong PlugsExtension Cords Unpacking Table a25’ 50’ 75’ 100’ 150’ Assembly Mounting the Motor Bobbin Winder Assembly Aligning the PulleysAdjusting the Belt Tension Mounting the Thread Stand SKU For technical questions, please callInstalling the Belt Covers OperationMounting the Bobbin Winder Moderate to slow speeds for the first 15 minutes of use Attaching the NeedleBobbin Winder Operation OFF PositionWith the thread Threading the Top Thread DetailAdjusting the Bobbin Thread Tension Adjusting the Stitch LengthAdjusting the Needle Thread Tension Raising the Presser FootSetting the Presser Foot Pressure Adjusting the Feed TimingAdjusting Feed Dog Height Adjusting Needle-to-hook Timing Adjusting the Presser Bar Height Adjusting the Height of the Knee LifterMaintenance Adjusting Sewing Speed with Pulleys sold separatelyMotor Wiring Diagram ARM BED Parts List Part Description QtyARM BED Assembly Drawing Main Shaft Parts List Main Shaft assembly Drawing Stitch Drive Parts List Stitch Drive Assembly Drawing Presser BAR Parts List Presser BAR Assembly Drawing Feed Control Parts List Feed Control Assembly Drawing Lubrication Parts List Lubrication Assembly Drawing Base Assembly Drawing and Parts List Accessories Parts List and Assembly Drawing Bobbin Winder & Thread Stand Unit Parts List Bobbin Winder & Thread Stand Unit Assembly Drawing Motor Parts List Motor Assembly Drawing Limited 90 DAY Warranty