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F-88

TROUBLESHOOTING & REPAIR

F-88

 

OUTPUT RECTIFIER BRIDGE AND CHOKE REMOVAL AND REPLACEMENT

(CONTINUED)

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REMOVAL PROCEDURE

1.Turn the engine off.

2.Remove negative battery cable.

3.Perform the Case Cover Removal proce- dure.

4.Perform the Chopper Module Capacitor Discharge procedure.

5.Remove the four screws holding the case front to the base of the machine.

6.Remove all plugs and leads from the weld control and pull coil PC boards. Be sure to mark the leads and plugs so they can be properly re-connected. See wiring dia- gram.

7.Remove the screws holding the D4 diode bridge and the CR1 engine protection relay to the center baffle assembly, and allow these components to remain attached to the case front wiring.

8.Remove any additional wring and cable ties as needed. Carefully mark leads for accu- rate re-connection.

9.Swing the case front to the side to permit access to the Output Rectifier and Choke.

Removing the Output Rectifier

10.Remove the heavy leads from the output rectifier. Carefully mark the leads for accurate re-connection, and also note the order and position of multiple lead con- nections.

11.Remove the nuts and lock washers hold- ing the Output Rectifier to the mounting bracket. You will need to reach through the large access holes on either side of the rectifier to reach these nuts.

12.Remove the Output Rectifier from the machine.

Removing the Output Choke

1.Remove the heavy leads from the choke. Carefully mark the leads for accurate re- connection, and also note the order and position of the leads in multiple lead con- nections.

2.Remove the three long bolts, lock washers and nuts holding the choke the mounting bracket in the machine base. Note that there is no bolt in the lower right corner of the choke.

3.Carefully remove the choke.

REPLACEMENT PROCEDURE

Replacing the Output Choke

1.Place the choke into the machine so that the three mounting holes in the choke line up with the holes in the mounting bracket.

2.Insert the three long bolts through the choke and the mounting bracket. Place a lock washer and nut on the end of each bolt and tighten.

3.Reconnect the choke leads. Position the leads, bolts, washers, and nuts exactly as they had been originally connected. Tighten the connection securely.

VANTAGE® 400

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Lincoln Electric 400 service manual Removal Procedure, Removing the Output Rectifier, Removing the Output Choke

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.