Maintenance

D-1	MAINTENANCE	D-1

WARNING

Have qualified personnel do the maintenance work. Turn the engine off before working inside the machine. In some cases, it may be neces- sary to remove safety guards to perform required maintenance. Remove guards only when necessary and replace them when the maintenance requiring their removal is com- plete. Always use the greatest care when work- ing near moving parts.

Do not put your hands near the engine cooling blower fan. If a problem cannot be corrected by following the instructions, take the machine to the nearest Lincoln Field Service Shop.

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ELECTRIC SHOCK can kill.

• Do not touch electrically live parts or electrode with skin or wet clothing.

•Insulate yourself from work and ground

•Always wear dry insulating gloves.

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ENGINE EXHAUST can kill.

• Use in open, well ventilated areas or vent exhaust outside.

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MOVING PARTS can injure.

•Do not operate with doors open or guards off.

• Stop engine before servicing.

•Keep away from moving parts.

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See additional warning information at front of this operator’s manual.

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General Instructions

1.Blow out the welder and controls with an air hose at least once every two months. In particularly dirty loca- tions, this cleaning may be necessary once a week. Use low pressure air to avoid driving dirt into the insu- lation.

2.“Current Range Selector” contacts should not be greased. To keep the contacts clean, rotate the cur- rent control through its entire range frequently. Good practice is to turn the handle from maximum to mini- mum setting twice each morning before starting to weld.

3.Put a drop of oil on the “Current Range Selector” shaft at least once every month.

4.When necessary, remove the sediment bowl, if so equipped, from beneath the fuel tank and clean out any accumulated dirt and water.

5.Follow the engine service schedule in this manual and the detailed maintenance and troubleshooting in the engine manufacturer’s manual.

Cooling System

The Classic 300 D is equipped with a pressure radia- tor. Keep the radiator cap tight to prevent loss of coolant. Clean and flush the cooling system periodi- cally to prevent clogging the passage and overheating the engine. When antifreeze is needed, always use the permanent type. Capacity = 9.5 qts (9.0 Ltrs.).

Bearings

This welder is equipped with a double-shielded ball bearing having sufficient grease to last indefinitely under normal service. Where the welder is used con- stantly or in excessively dirty locations, it may be nec- essary 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 Brushes

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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Shifting of the commutator 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.

CLASSIC 300D

300 D specifications

The Lincoln Electric 300 D and 300 DLX are portable diesel engine-driven welding generators that stand out for their versatility, reliability, and advanced features tailored for industrial, commercial, and construction applications. These machines are part of Lincoln Electric's commitment to delivering high-quality welding power solutions that can withstand the rigors of demanding work environments.

One of the key features of the Lincoln Electric 300 D and 300 DLX is their powerful engine, capable of generating consistent and reliable welding output. The machines are equipped with a robust, air-cooled, four-cycle diesel engine that ensures long run times and excellent fuel efficiency, making them ideal for extended job sites where access to power sources may be limited.

Both models provide an impressive welding output range, with the ability to weld continuously at high amperage. This high amperage capability allows welders to tackle a wide variety of applications, including stick, TIG, and MIG welding. The 300 DLX model boasts enhanced features such as increased welding output, which caters to heavy-duty applications, while the 300 D remains a solid choice for standard applications.

In terms of technology, the 300 DLX incorporates advanced digital technology that enables optimal arc performance and increased control over welding parameters. This feature not only improves weld quality but also enhances the overall user experience. The intuitive user interface allows welders to easily navigate through settings, making adjustments quick and efficient.

Both models also offer exceptional durability. Their rugged construction is designed to endure harsh job site conditions, and they are built with weather-resistant enclosures to protect vital components from the elements. The large fuel tanks ensure that operators can work for extended periods without frequent refueling, further enhancing productivity.

Additionally, the 300 D and 300 DLX are equipped with a variety of output options, including 115V and 230V auxiliary power, which can be utilized for powering tools and other equipment on-site. This versatility makes these generators not just welders, but comprehensive power solutions for a wide array of tasks.

In summary, the Lincoln Electric 300 D and 300 DLX are exceptional diesel engine-driven welding generators that offer unmatched power, advanced technology, and rugged durability. Their capacity to deliver superior welding performance, combined with versatile power output options, makes them indispensable tools for professional welders in a multitude of industries. Whether it’s for heavy industrial tasks or on-job site convenience, these models meet and exceed the expectations of demanding professionals.