E-2

 

TROUBLESHOOTING

E-2

 

 

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

Engine will “crank” but not start.

1. Air intake shut-off is closed.

 

 

 

 

Manually reset inside machine.

 

 

 

2.

Out of fuel. Fill fuel tank.

 

 

 

3.

Fuel shut off valve is in off posi-

 

 

 

 

tion.

 

 

 

4.

Low battery voltage.

 

 

 

 

Machine fails to hold the “heat”

1. Rough or dirty commutator.

 

constantly.

 

 

 

 

 

2.

Brushes may be worn down to

 

 

 

 

limit of life.

 

 

 

3.

Brush springs may be broken.

 

 

 

4.

Field circuit may have variable

 

 

 

 

resistance connections or inter-

 

 

 

 

mittent open circuit, due to loose

 

 

 

 

connections or broken wire.

 

 

 

 

 

If all recommended possible areas

 

 

5.

Electrode or work lead connec-

of misadjustment have been

 

 

 

tions may be poor.

checked and the problem persists,

 

 

 

 

Contact your local Lincoln

 

 

6.

Wrong grade of brushes may be

Authorized Field Service Facility.

 

 

 

installed on generator.

 

7.Field rheostat may be making poor contact and overheating.

8.“Current Control” may not be operating properly.

9.“Current Control” brushholder contact springs may be worn out or missing. Contact surface may be dirty, rough and pitted.

10.“Current Control” brushholder support stud and mating contact surfaces may be dirty or pitted and burned.

11.Engine running at varying speeds.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

SAE-400 SEVERE DUTY

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Lincoln Electric IM727 manual Possible Areas, Symptoms Misadjustments Course of Action, Contact your local Lincoln
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IM727 specifications

Lincoln Electric IM727 is a highly regarded machine in the welding industry, particularly known for its remarkable performance and innovative features. This versatile inverter-based welding machine has been designed to meet the demands of various welding applications while ensuring ease of use and efficiency.

One of the standout features of the IM727 is its advanced inverter technology. This technology allows for a more compact design while maintaining exceptional power output and energy efficiency. With a lightweight structure, the IM727 is easy to transport, making it an ideal choice for both field work and shop environments.

The IM727 is equipped with a wide range of welding processes, including MIG, TIG, and Stick welding. This versatility allows users to switch between different welding methods depending on the specific requirements of a project, making it highly adaptable to various materials such as steel, stainless steel, and aluminum. The intuitive interface provides straightforward controls, making the setup process quick and easy for both novice and experienced welders.

Another significant characteristic of the IM727 is its precise arc control, which enhances the quality of the welds. The machine features digital control circuitry that offers consistent arc stability, reducing spatter and improving the final appearance of the weld bead. This not only reduces the amount of post-weld cleanup required but also ensures stronger, more reliable welds.

Safety is a paramount concern in welding, and the IM727 comes equipped with several protective features. Overcurrent protection, thermal overload protection, and a built-in fan ensure that the machine operates safely and reliably. These features extend the machine’s lifespan and provide peace of mind to the user.

Furthermore, the IM727 is designed with user-friendly accessibility in mind. The front panel provides clear indicators and settings to facilitate easy operation, while the rugged construction ensures durability even in harsh working conditions.

In conclusion, Lincoln Electric IM727 stands out as a versatile welding machine with advanced inverter technology, multiple welding capabilities, and a focus on user safety and convenience. Its combination of portability, performance, and reliability makes it an excellent choice for professionals looking to elevate their welding operations. Whether used in a busy fabrication shop or on-site repairs, the IM727 is engineered to deliver exceptional results in diverse welding scenarios.
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