Harbor Freight Tools 3914 operating instructions For technical questions, please call

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inhibit rust. Always lock up tools and keep out of reach of children.

5.Use the right product for the job. Do not attempt to force a small product or attachment to do the work of a larger industrial tool. There are certain applications for which this product was designed. It will do the job better and more safely at the rate for which it was intended. Do not modify this product and do not use this product for a purpose for which it was not intended.

6.Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving parts. Protective, electrically nonconductive clothes and nonskid footwear are recommended when working. Wear restrictive hair covering to contain long hair.

7.Do not overreach. Keep proper footing and balance at all times. Do not reach over or across running machines.

8.Maintain tools with care. Keep needles sharp and tools clean for better and safer performance. Follow instructions for lubricating and changing accessories. Inspect tool cords periodically and, if damaged, have them repaired by a qualified technician. The handles must be kept clean, dry, and free from oil and grease at all times.

9.Disconnect power. Always turn the machine off and, if possible, disconnect the power plug of the machine from the receptacle before adjusting, repairing, or cleaning the machine; leaving the machine unattended; tilting the machine head; or removing the V-belt.

10.Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are removed from

the machine work surface before plugging it in.

11.Avoid unintentional starting. Be sure the switch is in the Off position when not in use and before plugging in.

12.Stay alert. Watch what you are doing, use common sense. Do not operate when you are tired.

13.Check for damaged parts. Before using any product, any part that appears damaged should be carefully checked to determine that it will operate properly and perform its intended function. Check for alignment and binding of moving parts; any broken parts or mounting fixtures; and any other condition that may affect proper operation. Any part that is damaged should be properly repaired or replaced by a qualified technician. Do not use if any switch does not turn On and Off properly.

14.Guard against electric shock. Prevent body contact with grounded surfaces such as pipes, radiators, ranges, and refrigerator enclosures.

15.Replacement parts and accessories. When servicing, use only identical replacement parts. Use of any other parts will void the warranty. Only use accessories intended for use with this tool. Approved accessories are available from Harbor Freight Tools.

16.Do not operate tool if under the influence of alcohol or drugs. Read warning labels if taking prescription medicine to determine if your judgment or reflexes are impaired while taking drugs. If there is any doubt, do not operate the tool.

17.Use proper size and type extension cord. If an extension cord is required, it must be of the proper size and type

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 callSave This Manual SpecificationsSafety Warnings Precautions Read all instructions before using this ToolFor 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 Aligning the Pulleys Bobbin Winder AssemblyAdjusting the Belt Tension SKU For technical questions, please call Mounting the Thread StandInstalling the Belt Covers OperationMounting the Bobbin Winder OFF Position Attaching the NeedleBobbin Winder Operation Moderate to slow speeds for the first 15 minutes of useWith the thread Detail Threading the Top ThreadRaising the Presser Foot Adjusting the Stitch LengthAdjusting the Needle Thread Tension Adjusting the Bobbin Thread TensionSetting the Presser Foot Pressure Adjusting the Feed TimingAdjusting Feed Dog Height Adjusting Needle-to-hook Timing Adjusting the Height of the Knee Lifter Adjusting the Presser Bar HeightAdjusting Sewing Speed with Pulleys sold separately MaintenanceMotor Wiring Diagram Part Description Qty ARM BED Parts ListARM 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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