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F-39

F-39

TROUBLESHOOTING & REPAIR

ENGINE THROTTLE ADJUSTMENT TEST (continued)

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6.If either of the readings is incorrect, adjust the throttle as follows:

Adjust HIGH IDLE: Use the 10mm wrench to loosen the locking nut. See Figure F.11 for location of the adjusting screw and locking nut. Turn the threaded screw counter-clockwise to increase the HIGH IDLE speed. Adjust the speed until the tach reads between 1890 and 1915 RPM. Retighten the locking nut.

Adjust LOW IDLE: First make sure there is no load on the machine. Set the IDLE switch to AUTO and wait for the engine to change to low idle speed. Use the 7/16" wrench to loosen the solenoid lever arm locking nut. See Figure F.12. Adjust the collar, to change the amount of throw in the lever arm, until the tach reads between 1325 and 1400 RPM. Retighten the locking nut.

Frequency Counter Method

1.Plug the frequency counter into one of the 115 VAC auxiliary receptacles.

2.Start the engine and check the frequency counter. At HIGH IDLE (1900 RPM), the counter should read 63 Hz. At LOW IDLE (1400 RPM), the counter should read 47 Hz. Note that these are median measurements; hertz readings may vary slightly above or below.

3.If either of the readings is incorrect, adjust the throttle as follows:

Adjust HIGH IDLE: Use the 10mm wrench to loosen the locking nut. See Figure F.11 for location of the adjusting screw and lock- ing nut. Turn the threaded screw counter- clockwise to increase the HIGH IDLE speed. Adjust the speed until the frequency reads 63 Hz. Retighten the locking nut.

Adjust LOW IDLE: First make sure there is no load on the machine. Set the IDLE switch to AUTO and wait for the engine to change to low idle speed. Use the 7/16" wrench to loosen the solenoid lever arm locking nut. See Figure F.12. Adjust the collar, to change the amount of throw in the lever arm, until the frequency reads 47 Hz. Retighten the locking nut.

Oscilloscope Method

1.Connect the oscilloscope to the 115 VAC receptacle, according to the manufacturer’s instructions. At HIGH IDLE (1900 RPM), the waveform should exhibit a period of 15.8 milliseconds. At 1400 RPM, the waveform should exhibit a period of 21.4 milliseconds. Refer to the NORMAL OPEN CIRCUIT

VOLTAGE WAVEFORM (115 VAC AUXIL- IARY) HIGH IDLE - NO LOAD in this sec- tion of the manual.

2.If either waveform periods is incorrect, adjust the throttle as follows:

Adjust HIGH IDLE: Use the 10mm wrench to loosen the locking nut. See Figure F.11 for location of the adjusting screw and lock- ing nut. Turn the threaded screw counter- clockwise to increase the HIGH IDLE speed. Adjust the speed until the period is 15.8 mil- liseconds. Retighten the locking nut.

Adjust LOW IDLE: First make sure there is no load on the machine. Set the IDLE switch to AUTO and wait for the engine to change to low idle speed. Use the 7/16" wrench to loosen the solenoid lever arm locking nut. See Figure F.12. Adjust the collar, to change the amount of throw in the lever arm, until the period is 21.4 millisec- onds. Retighten the locking nut.

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COMMANDER 400

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Lincoln Electric SVM133-B service manual Frequency Counter Method, Oscilloscope Method

SVM133-B specifications

The Lincoln Electric SVM133-B is an innovative welding machine designed to meet the diverse needs of welders and fabrication shops. This versatile equipment combines state-of-the-art technology with user-friendly features, making it ideal for both novice and professional welders.

One of the main features of the SVM133-B is its advanced inverter technology. This allows for a more efficient power delivery, which translates into reduced energy consumption and lower operational costs. The machine is capable of delivering optimal welding performance across a range of materials, from thin sheets to heavier sections, making it suitable for various applications in industries such as automotive, construction, and repair.

The SVM133-B supports multiple welding processes, including MIG, stick, and TIG welding. This flexibility ensures that users can adapt to various job requirements without needing multiple machines. The intuitive control panel allows users to switch between modes effortlessly, providing a seamless welding experience.

Another notable characteristic of the SVM133-B is its compact and lightweight design. Weighing significantly less than traditional welding machines, it is highly portable, making it easy to transport to different job sites. Additionally, its rugged construction ensures durability, allowing it to withstand tough working conditions.

The SVM133-B is equipped with advanced safety features, such as overheat and overload protection, which safeguard both the machine and the user during operation. It also includes a digital display that provides real-time feedback on settings, voltage, and amperage, which enhances precision and control during welding tasks.

Lincoln Electric has prioritized ease of use in the SVM133-B, with quick setup guides and clear instructions. This user-centric approach not only facilitates a smoother learning curve for beginners but also optimizes the workflow for experienced welders, enabling them to maximize productivity.

One of the standout features is the capability to weld aluminum with ease, thanks to its spool gun compatibility. This feature sets the SVM133-B apart from many competitors, providing added value for users who require flexibility in their welding projects.

In summary, the Lincoln Electric SVM133-B stands out in the welding machine market due to its inverter technology, multi-process capabilities, portability, and robust safety measures. It embodies the perfect blend of innovation and practicality, making it a top choice for welders looking to enhance their skills and productivity across a wide array of applications. Whether for professional use or hobbyist projects, the SVM133-B offers a reliable solution for high-quality welding tasks.