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F-32

TROUBLESHOOTING & REPAIR

F-32

 

ENGINE THROTTLE ADJUSTMENT TEST (CONTINUED)

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Vibratach Method

A Vibratach is used to measure the vibrations caused by the running engine. It can be positioned anywhere where the engine vibration is reasonably strong. The best results will likely be obtained by opening the top engine cover and placing the Vibratach directly against the top of the engine.

Read and understand the manufacturer’s instruc- tions for the Vibratach.

1.Start the engine and place the idle switch in the “HIGH IDLE” position. Make sure that there is no load on the machine.

2.Position and adjust the Vibratach; it should read between 1860 and 1890 RPM.

3.Move the idle switch to the “AUTO IDLE” posi- tion and wait for the idle solenoid to energize, and the engine RPM to drop and stabilize at the low idle RPM.

4.Position and adjust the Vibratach; it should read between 1300 and 1400 RPM.

If either of the readings is incorrect, proceed to the “THROTTLE ADJUSTMENT PROCE- DURE”.

THROTTLE ADJUSTMENT PROCEDURE

IMPORTANT: Both the high and low idle settings are adjusted at the solenoid.

1.Check that the linkage attaching the solenoid to the engine speed control lever is properly aligned and in good condition. It is more important that the solenoid linkage be more precisely aligned when in the high speed (de- energized position).

2.Check to be sure the spring located inside the rubber boot is not broken or missing. In the default, (de-energized) position the spring should be holding the solenoid in the high speed position. See Figure F.5.

NOTE: Low idle RPM must be set, and the adjustment nuts tightened, before the high idle RPM is adjusted.

Low Idle adjustment:

1.With engine running and no load applied to the machine, place the idle switch in the “AUTO IDLE” position. Wait for the idle solenoid to energize and the engine speed to drop and stabilize to low idle RPM.

2.If the low idle RPM requires adjustment, loosen the low idle adjustment jam nuts. Turn both nuts so they are clear of the swivel fitting. Rotate the swivel fitting until the engine speed has been set to between 1200 and 1400 RPM. Hold the swivel fitting in position while tighten- ing the first jam nut against the swivel fitting, and then tighten the second jam nut against the first. Do not adjust at engine stop lever.

3.Re-check the low idle RPM, and then proceed to the high idle adjustment.

High idle adjustment:

1.With engine running, place the idle switch in the “HIGH IDLE” position. The solenoid should immediately de-energize, allowing the engine to increase to high idle speed.

2.If the high idle RPM requires adjustment, loosen the high idle adjustment screw jam at engine lever + high speed stop nut and turn the adjusting screw until the engine speed is between 1860 and 1890 RPM. Hold the adjusting screw in position while tightening the jam nut against the solenoid plunger.

3.Re-check the high idle RPM.

4.Close the engine service access doors and shut off the engine.

VANTAGE® 400

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Lincoln Electric 400 Vibratach Method, Throttle Adjustment Procedure, Low Idle adjustment, High idle adjustment
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400 specifications

The Lincoln Electric 400 is a state-of-the-art multi-process welding machine designed to meet the demands of today’s industrial welding applications. Renowned for its reliability and versatility, this welder is a preferred choice among professionals in fabrication, construction, and maintenance industries.

One of the main features of the Lincoln Electric 400 is its multi-process capability. It seamlessly integrates MIG, TIG, and stick welding processes into a single unit, allowing users to switch between methods depending on the job at hand. This flexibility makes it incredibly suitable for a wide range of materials, including steel, stainless steel, and aluminum.

The welding machine boasts a robust power output, with a maximum range of 400 amps. This impressive capacity enables it to handle thick materials effectively, making it ideal for heavy-duty tasks. The machine operates on both single-phase and three-phase power, giving users the advantage of versatility depending on the power source available at the job site.

Another significant characteristic of the Lincoln Electric 400 is its advanced digital display and control interface. This user-friendly panel allows for easy adjustments to voltage and wire feed speed, ensuring precision and high-quality welds. Additionally, the machine includes built-in features to improve the consistency of welding, such as the Smart MIG technology which optimizes the welding parameters automatically based on the wire diameter and material thickness.

In terms of durability, the Lincoln Electric 400 is designed for rugged environments. Its heavy-duty construction, including a robust metal casing and protective features, ensures it can withstand the rigors of daily use in harsh conditions. Furthermore, the welder is often praised for its efficient cooling system, which prolongs the machine's lifespan and maintains optimal performance even during extended usage.

Portability is another key aspect of this welding machine. Weighing under 200 pounds, it is designed with mobility in mind. The integrated wheels allow for easy transportation between job sites, making it a practical choice for mobile welders and contractors.

In conclusion, the Lincoln Electric 400 stands out in the welding equipment market due to its multi-process capabilities, impressive power output, user-friendly interface, durability, and portability. It is engineered to exceed the expectations of professional welders, providing them with the tools needed for high-quality results across a variety of applications.
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