Harbor Freight Tools 3914 Adjusting the Stitch Length, Adjusting the Needle Thread Tension

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pulling it to the top of the machine. Pull both threads behind the Presser Foot, leaving at least 4” of excess thread.

Adjusting the Stitch Length

Stitch Length

Dial (46e)

Figure 26

To increase or decrease the stitch length, turn the Stitch Length Dial (46e) to

the desired number (in millimeters) as indicated at (A) above.

Adjusting the Needle Thread Tension

Tension Adjustment

Knob (3a)

Figure 27

1.Turn Tension Adjustment Knob (3a) clockwise to increase thread tension.

2.Turn Tension Adjustment Knob counterclockwise to decrease thread tension.

Adjusting the Bobbin Thread

Tension

Increase

Decrease

Tension

Tension

Tension

Bobbin

Adjustment

Case (21c)

Screw

 

Figure 28

1.Using a small flathead screwdriver (sold separately), turn the Tension Adjustment Screw on the Bobbin Case (21c) clockwise to increase bobbin tension.

2.Turn the Tension Adjustment Screw counterclockwise to decrease bobbin tension.

Raising the Presser Foot

The Presser Foot (9d) can be raised and lowered using the Presser Foot Lever (18d) or the Knee Lifter (21g).

The Knee Lifter raises the Presser Foot momentarily (to a height of up to 1/2”), as long as it is pushed, while the Presser Foot stays in the raised or lowered position when using the Presser Foot Lever.

 

 

REV 10b

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

SKU 3914

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Contents For technical questions or replacement parts, please call Single needle industrial Sewing MachineSpecifications Safety Warnings PrecautionsRead all instructions before using this Tool Save This ManualFor technical questions, please call Sewing Safety Precautions Grounded Tools Tools with Three Prong Plugs GroundingExtension Cords Table a Unpacking25’ 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 callOperation Installing the Belt CoversMounting the Bobbin Winder Attaching the Needle Bobbin Winder OperationModerate to slow speeds for the first 15 minutes of use OFF PositionWith the thread Threading the Top Thread DetailAdjusting the Stitch Length Adjusting the Needle Thread TensionAdjusting the Bobbin Thread Tension Raising the Presser FootAdjusting the Feed Timing Setting the Presser Foot PressureAdjusting 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

3914 specifications

Harbor Freight Tools 3914 is a robust and versatile portable generator designed to meet the power needs of both professionals and DIY enthusiasts. Featuring a compact design with a durable frame, this generator is built to withstand tough job site conditions while providing reliable power wherever it is needed.

One of the standout features of the 3914 model is its powerful 212cc engine, which delivers a peak output of 3500 watts and a running output of 3000 watts. This allows users to power multiple devices simultaneously, making it suitable for everything from household appliances during power outages to tools on construction sites. The generator's 4-gallon fuel tank provides an impressive run time of around 11 hours at a 50% load, ensuring that users can rely on it for extended periods without frequent refueling.

In terms of technology, the Harbor Freight Tools 3914 incorporates a user-friendly control panel that includes two 120V AC outlets, a 12V DC outlet, and a circuit breaker for added safety. The 120V outlets are perfect for connecting various tools and devices, while the DC outlet can be used to charge batteries and other electronic devices. The generator also features an easy-to-read fuel gauge, which helps users monitor fuel levels and plan refueling accordingly.

Furthermore, the generator is equipped with a recoil start system, allowing for quick and straightforward operation. Additionally, its lightweight construction, combined with two carrying handles, ensures that it can be transported with ease, making it ideal for camping trips, outdoor events, or emergency use at home.

Safety is also a priority with the 3914 model. It comes with built-in low oil shutdown technology, which automatically turns off the engine when oil levels are low, preventing potential damage and prolonging the life of the generator. The generator's quiet operation is another significant advantage, ensuring that it can be used without causing excessive noise disturbances.

Overall, the Harbor Freight Tools 3914 portable generator stands out for its powerful performance, user-friendly features, and reliable safety mechanisms. Its combination of efficiency and portability makes it a valuable asset for anyone in need of reliable power on the go.
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