Idler Maintenance, Nameplates | Lincoln Electric 300 D guide

D-2	MAINTENANCE	D-2

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

To seat 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. With slight additional finger pres- sure on top of the brushes, pull the sandpaper around the circumference 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 possible misaligned shaft. Have an authorized Field Service Shop check and realign the shaft.

Idler Maintenance

CAUTION

Before doing electrical work on the idler printed circuit board, disconnect the battery.

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When installing a new battery or using a jumper bat- tery to start the engine, be sure the battery polarity is connected properly. The correct polarity is negative ground. Damage to the engine alternator and the printed circuit board can result from incorrect connec- tion.

1.The solenoid plunger must work freely and not bind. Dust the plunger about once a year with graphite powder.

2.Proper operation of the idler requires good ground- ing of the printed circuit board, reed switch, and battery.

3.Idler solenoid is activated for high idle.

4.If desired, the welder can be used without automat- ic idling by setting the “Idler” switch to the “High” position.

Nameplates

Whenever routine maintenance is performed on this machine - or at least yearly - inspect all nameplates and labels for legibility. Replace those which are no longer clear. Refer to the parts list for the replace- ment item number.

Purging Air from Fuel System (Perkins 104-22 Engine)

WARNING

Keep fuel clear of open flames or arcs, allow engine to cool before working on the fuel system. Wipe up any spilled fuel and do not start engine until fumes clear.

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If the engine is running rough and you suspect air has been trapped in the fuel system, (e.g. the engine was allowed to run out of fuel) perform the following steps using qualified personnel:

1.Loosen by two or three turns, the vent screw (Figure D.1) on the fuel inlet connection.

Vent Screw

Priming

Lever

FIGURE D.1

2.For Engines Equipped with a mechanical fuel pump:

Operate the priming lever on the fuel lift pump until fuel, free of air, flows from the vent point. Tighten the vent screw. If the pump is at the point of maxi- mum lift, it will not be possible to operate the prim- ing lever. If this occurs, turn the crankshaft one revolution.

For Engines Equipped with an electric fuel pump:

Operate the electric fuel pump by turning the “Ignition” switch “ON” until fuel, free of air, flows from the vent point. Tighten the vent screw.

3.Contact your Perkins Engine repair facility if prob- lems persist.

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.