Harbor Freight Tools 03914 Adjusting the Height of the Feed Dog, Adjusting Needle-to-hook Timing

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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, pucker- ing may result when sewing lightweight materi- als. 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.Tighten Screw (2), being careful not to overtighten.

Adjusting Needle-to-hook Timing

1.Turn the Hand Wheel to bring the needle bar down to the lowest point of its stroke.

2.Loosen Set Screw (1).

3.When using a DBX1 needle, align to marker line “A” on the needle bar (2) with the bottom end of the needle bar lower bushing (3), then tighten Set Screw (1).

When using a DAX1 needle, align to marker line “B” on the needle bar (2) with the bottom end of the needle bar lower bushing (3), then tighten Set Screw (1).

4.When using a DBX1 needle, loosen three Hook Set Screws, turn the Hand Wheel, and align the marker line “B” on the needle bar (2) with the bottom end of the needle bar lower bushing (3).

When using a DAX1 needle, align the marker line “D” on the needle bar (2) with the bottom end of the needle bar lower bushing (3).

5.After making the adjustments in steps 3 and 4, align the Hook Blade point (5) with the center of the needle (4).

Provide a clearance of .001” to .004” (0.04 to 0.1 mm) between the needle and the hook. This clearance is less than 1/64” (almost touching). Securely tighten the three Set Screws. If the clearance is too small, the tip of the hook will be abraded. If it is too large, it will lead to skip over.

SKU 03914

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Contents For technical questions and replacement parts, please call 03914Specifications Safety Warnings and PrecautionsRead all instructions before using this tool Save This ManualPage Sewing Safety Precautions UnpackingAssembly REV 04/03 REV 05/03 Mounting the Thread Stand REV 03/04Operation Mounting the Bobbin WinderBobbin Winder Operation Setting the Bobbin into the Bobbin Case Winding Thread Onto the BobbinAdjusting the Stitch Length Adjusting the Needle Thread TensionAdjusting the Bobbin Thread Tension Threading the Machine HeadSetting the Hand Lifter Setting the Presser Foot PressureAdjusting the Feed Timing Changing the Thread Take-up Spring Stroke and PressureAdjusting the Height of the Feed Dog Adjusting Needle-to-hook TimingMaintenance Adjusting the Presser Bar HeightAdjusting the Thread Take-up Stroke Adjusting the Height of the Knee LifterARM BED Parts List ARM BED Assembly Drawing Main Shaft Thread TAKE-UP Parts List Main Shaft Thread TAKE-UP Assembly Drawing FABRIC--PIERCING Hook Driving Parts List FABRIC--PIERCING Hook Driving Assembly Drawing Presser BAR Parts List Presser BAR Assembly Drawing Feed Mechanism Parts List Feed Mechanism Assembly Drawing Lubrication Parts List Lubrication Assembly Drawing OIL Reservoir & Knee Lifter Assembly Drawing and Parts List Machine Head Accessories Parts List and Assembly Drawing Bobbin Winder & Thread Stand Unit Parts List Bobbin Winder & Thread Stand Unit Assembly Drawing

03914 specifications

Harbor Freight Tools is well-known for offering a wide range of affordable tools and equipment, catering to DIY enthusiasts and professionals alike. One of their standout products is the Harbor Freight Tools 03914, a versatile tool that has gained popularity for its efficiency and reliability.

The Harbor Freight Tools 03914 is primarily recognized as a compact, portable air compressor that boasts impressive specifications. It features a powerful 1 HP motor that delivers a maximum pressure of 100 PSI, making it capable of handling a variety of tasks, from inflating tires to powering pneumatic tools. Its lightweight design, weighing in at around 30 pounds, makes it easy to transport and store, which is perfect for both home use and on-the-go projects.

One of the main features of the 03914 model is its oil-free pump, which means less maintenance and no need for oil changes. This design allows for cleaner air delivery, making it suitable for applications that require an oil-free output. The air compressor also includes a 3-gallon tank that provides ample air storage, ensuring consistent performance during usage. The tank is built from durable materials, contributing to the compressor's longevity and reliability.

In terms of technology, the Harbor Freight Tools 03914 is equipped with an integrated pressure regulator and a universal quick-disconnect fitting, allowing for easy attachment of air hoses and tools. The clear pressure gauge enables users to monitor the air pressure with precision, which is essential for various projects. Additionally, it features a low-profile design that enhances stability, reducing the risk of tipping over.

The compressor's noise level is another key characteristic that sets it apart. Operating at a relatively low decibel level, it provides a quieter work environment, making it suitable for indoor use without causing disruptions. This feature appeals to those who prefer a less noisy workspace, especially in residential areas.

Overall, the Harbor Freight Tools 03914 is designed with efficiency, portability, and ease of use in mind. Its combination of powerful performance, user-friendly features, and low maintenance makes it an excellent choice for anyone in need of a reliable air compressor. Whether you're a DIY hobbyist or a professional, this compact air compressor offers the versatility and functionality to manage a wide range of tasks efficiently.
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