To test the field winding | Lincoln Electric SVM148-B guide

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F-35

TROUBLESHOOTING & REPAIR

AUXILIARY AND FIELD WINDING TEST (continued)

FIGURE F.10 – LOCATION OF LEADS #7 AND #9 AT FIELD BRIDGE RECTIFIER

201
201A		7
	_	AC
		AC
			200
			200A
			200B
		+
9		AC
				Field
		Cable	Retaining	Bridge
		Cable	Retaining	Rectifier	9
		Tie	Tab	Rectifier		201
		Tie	Tab			201
		Capacitor				201A
		Capacitor
						7
				200
				200A
				200B

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To test the field winding:

1.With the 5/16” and 3/8” nut drivers, remove the case right side.

2.Connect the volt/ohmmeter probes to leads #7 and #9 where they connect to the Field Bridge Rectifier. See Figure F.10.

3.Start the engine and run it at high idle (3700 RPM).

4.Set the output control to the maximum position (position 10).

5.Check the AC voltage reading. It should be between 40 and 47 VAC.

If the reading is missing or not within spec- ifications, check for loose or broken wires between the test points and the stator windings. See the Wiring Diagram. Make sure that the windings are NOT grounded internally to the stator iron. If the leads are intact, then the stator may be faulty. Re- place the stator. If the voltage reading is within specifications, the windings are good and functioning properly.

6.Reinstall the right case side.

RANGER 300 D AND 300 DLX

SVM148-B specifications

The Lincoln Electric SVM148-B is a state-of-the-art inverter-based power source designed for both professional welders and hobbyists. As a versatile machine, it excels in a variety of welding applications including MIG, TIG, and stick welding. This machine is particularly notable for its efficiency and portability, making it an ideal choice for on-site projects or workshops where space is limited.

One of the main features of the SVM148-B is its inverter technology. Unlike traditional transformer-based welders, inverter welders are typically lighter and more compact. This means that users can transport the machine more easily without sacrificing power or performance. The SVM148-B is capable of delivering a substantial amperage range, allowing for adjustments that suit various materials and thicknesses, from thin sheet metal to thicker plates.

The machine offers adjustable output levels, providing precise control over the welding process. This level of control is essential for achieving clean, strong welds and is especially useful when working with different materials. The SVM148-B is equipped with digital display features that provide real-time feedback on power settings and welding parameters, allowing welders to make quick adjustments as needed.

Another significant advantage of the SVM148-B is its duty cycle, which is designed to accommodate extended usage without overheating. A robust duty cycle means that professionals can rely on this machine for prolonged periods, making it a dependable choice for heavy-duty tasks.

The SVM148-B also includes advanced safety features such as overload protection, which ensures that the machine will shut down in the event of excessive current draw. This feature not only protects the equipment but also enhances user safety during operation.

Moreover, the machine is compatible with a wide variety of welding wires and electrodes, adding to its versatility. Whether you're working with stainless steel, aluminum, or mild steel, the SVM148-B can adapt seamlessly.

In conclusion, the Lincoln Electric SVM148-B combines advanced inverter technology with user-friendly features, making it an invaluable addition to any welding setup. Its portability, control options, robust duty cycle, and safety measures set it apart as a reliable and efficient welding solution for professionals and hobbyists alike. Whether for a small workshop or large industrial applications, the SVM148-B meets the demands of modern welding with efficiency and ease.

Lincoln Electric SVM148-B service manual To test the field winding

Models: SVM148-B