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.When sewing lightweight materials, move the Thread Guide (1) to the right (B) to decrease the length of thread pulled out by the Thread Take-up.

3.The normal setting is when the marker line “C” on the Thread Guide (1) is aligned with the center of the screw.

Adjusting the Height of the Knee Lifter

The standard height of the Presser Foot lifted using the Knee Lifter is 0.39 inch (10 mm).

1.To adjust the Presser Foot lift up to 0.5 inch (13 mm), adjust the Screw (1).

2.When the Presser Foot lift is adjusted over 0.39 inch (10 mm), be sure that the bottom end of the Needle Bar (2) does not hit the Presser Foot (3).

This can be manually checked by turning the Hand Wheel.

Maintenance

1.Machine adjustments should only be performed by a qualified technician.

2.Check the oil level weekly when the machine is used daily. Add sewing machine oil as required to the high level marking.

3.Clean the machine with a clean, damp cloth. Do not use solvents or thinners.

4.When not in use, cover the machine and store in a clean and dry location.

SKU 03914

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Harbor Freight Tools 03914 manual Maintenance, Adjusting the Presser Bar Height, Adjusting the Thread Take-up Stroke
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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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