Harbor Freight Tools
3914
operating instructions
Motor Assembly Drawing
Specification
Install
Parts list
Motor Wiring Diagram
Warranty
Maintenance
Assembly
Adjusting the Belt Tension
Sewing Safety Precautions
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J - MOTOR ASSEMBLY DRAWING
SKU 3914
For technical questions, please call
1-800-444-3353.
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Contents
Single needle industrial Sewing Machine
For technical questions or replacement parts, please call
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Specifications
Safety Warnings Precautions
Read all instructions before using this Tool
For technical questions, please call
Sewing Safety Precautions
Grounding
Grounded Tools Tools with Three Prong Plugs
Extension Cords
Unpacking
Table a
25’ 50’ 75’ 100’ 150’
Assembly
Mounting the Motor
Aligning the Pulleys
Bobbin Winder Assembly
Adjusting the Belt Tension
SKU For technical questions, please call
Mounting the Thread Stand
Installing the Belt Covers
Operation
Mounting the Bobbin Winder
OFF Position
Attaching the Needle
Bobbin Winder Operation
Moderate to slow speeds for the first 15 minutes of use
With the thread
Detail
Threading the Top Thread
Raising the Presser Foot
Adjusting the Stitch Length
Adjusting the Needle Thread Tension
Adjusting the Bobbin Thread Tension
Setting the Presser Foot Pressure
Adjusting the Feed Timing
Adjusting Feed Dog Height
Adjusting Needle-to-hook Timing
Adjusting the Height of the Knee Lifter
Adjusting the Presser Bar Height
Adjusting Sewing Speed with Pulleys sold separately
Maintenance
Motor Wiring Diagram
Part Description Qty
ARM BED Parts List
ARM 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
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