Lincoln Electric IM727 Bearing Maintenance, Commutator and Brush Maintenance, Cooling System

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MAINTENANCE

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BEARING MAINTENANCE

This welder is equipped with a double-shielded ball bearing having sufficient grease to last indefinitely under normal ser- vice. Where the welder is used constantly or in excessively dirty locations, it may be necessary to add one-half ounce of grease per year. A pad of grease one inch wide, one inch long and one inch high weighs approximately one-half ounce. Over greasing is far worse than insufficient greasing.

When greasing the bearings, keep all dirt out of the area. Wipe the fittings completely clean and use clean equipment. More bearing failures are caused by dirt introduced during greasing than from insufficient grease.

COMMUTATOR AND BRUSH MAINTENANCE

WARNING

Uncovered rotating equipment can be dangerous. Use care so your hands, hair, clothing or tools do not catch in the rotating parts. Protect yourself from particles that may be thrown out by the rotat- ing armature when stoning the commutator.

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The generator brushes are properly adjusted when the welder is shipped. They require no particular attention. DO NOT SHIFT THE BRUSHES or adjust the rocker setting.

Shifting of the brushes may result in:

-Change in machine output

-Commutator Damage

-Excessive brush wear

Periodically inspect the commutator, slip rings and brushes by removing the covers. DO NOT remove or replace these covers while the machine is running.

Commutators and slip rings require little attention. However, if they are black or appear uneven, have them cleaned by an experienced maintenance man using fine sandpaper or a commutator stone. Never use emery cloth or paper for this purpose.

NOTE: If the welder is used in dirty or dusty locations, or if the welder is not used for prolonged periods of time, it may be necessary to clean the commutator and slip rings more often.

Replace brushes when they wear within 1/4" of the pig- tail. A complete set of replacement brushes should be kept on hand. Lincoln brushes have a curved face to fit the commutator. Have an experienced maintenance man seat these brushes by lightly stoning the commu- tator as the armature rotates at full speed until contact is made across the full face of the brushes. After ston- ing, blow out the dust with low pressure air.

To seat the slip ring brushes, position the brushes in place. Then slide one end of a piece of fine sandpaper between slip rings and brushes with the coarse side against the brushes. Pull the sandpaper around the cir- cumference of the rings, in direction of rotation only - until brushes seat properly. In addition, stone slip ring with a fine stone. Brushes must be seated 100%.

Arcing or excessive exciter brush wear indicates a pos- sible misaligned shaft. Have an authorized Field Service Shop check and realign the shaft.

COOLING SYSTEM

The SAE-400 SEVERE DUTY is equipped with a pres- sure radiator. Keep the radiator cap tight to prevent loss of coolant. Clean and flush the cooling system periodically to prevent clogging the passage and over- heating the engine. When antifreeze is needed, always use the permanent type.

FUEL FILTERS

WARNING

When working on the fuel system

• Keep ungrounded lights away, do not smoke !

•Do not spill fuel !

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The SAE-400 SEVERE DUTY is equipped with a Fuel Pre-Filter/Water Separator Assembly located before the lift pump and a Secondary Fuel Filter located after the lift pump and before the fuel injectors. The Fuel Pre-Filter/Water Separator is mounted to the engine block just below the lift pump.

The Secondary Fuel Filter is mounted directly to the engine just above the oil filter.

FUEL PRE-FILTER/WATER SEPARATOR ASSEMBLY

The pre-filter is a 150 micron screen designed to pro- tect against gross fuel contamination of the water sep- arator element and the Secondary Fuel Filter. If the pre-filter becomes plugged it may be removed, inspect- ed, cleaned and reinstalled. In general this only needs to be done with each water separator element change (about every 1,000 hrs.) However if at any time exces- sive fuel contamination is suspected or a sudden fall- off in engine performance is detected the pre-filter screen should be inspected and cleaned. Follow the following procedure:

SAE-400 SEVERE DUTY

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Contents IM727 Safety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcThank You Table of Contents Height Width Depth Weight InstallationTechnical Specifications SAE-400 Severe Duty Safety Precautions LOCATION/VENTILATIONStacking Angle of OperationPRE-OPERATION Engine Service Engine Cooling System Battery ConnectionEngine BREAK-IN Spark Arrestor Welding Output CablesMachine Grounding Table A.1 Combined Length of Electrode Work CablesSafety Instructions OperationOperating Instructions General DescriptionDesign Features and Advantages For Auxiliary PowerOther Features Duty CycleEngine Controls Remote Control Auxiliary Power ControlsPolarity Switch Welder ControlsEngine Operation Typical Fuel ConsumptionStarting Instructions BREAK-IN PeriodK1690-1 Gfci Receptacle KIT AccessoriesOptional Field Installed Accessories Maintenance Routine MaintenancePeriodic Maintenance Engine OIL ChangeBearing Maintenance Commutator and Brush MaintenanceFuel PRE-FILTER/WATER Separator Assembly Cooling SystemSecondary Fuel Filter Engine Maintenance Components Make Part NumberWater Separator Element For machines with integral spark arresting muf- flers Gfci Receptacle Testing and RESET- Ting ProcedureFor machines with separate spark arresting unit Troubleshooting HOW to USE Troubleshooting GuideContact your local Lincoln Symptoms Misadjustments Course of ActionPossible Areas Contact your local Lincoln Authorized Field Service Facility Faulty receptacles Wiring DiagramsSAE-400 Severe DutyDimension Print M8869-23SAE-400 Sever Duty Precaucion Aviso DE

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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