Lincoln Electric IM659-B Operation, General Description, Design Features, Rated Output Duty Cycle

B-1 OPERATION B-1

SAFETY PRECAUTIONS

WARNING

Do not attempt to use this equipment until you have thoroughly read the engine manufacturer’s manual supplied with your welder. It includes important safety precautions, detailed engine starting, operating and maintenance instructions, and parts lists.

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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 the front of this operator’s manual.

Operate the welder with the doors closed. Leaving the doors open changes the designed air flow and can cause overheating.

GENERAL DESCRIPTION

The Classic® 300G is a heavy duty, engine driven, DC arc welding power source, capable of providing constant current output for stick welding or DC TIG welding. This welder is wound with all copper coils, rated at 300 amps/32 Volts, and provides other Classic features such as improved door latches and stainless hinges. With the

addition of the optional K623-1 Wire Feed Module™ the Classic 300G will provide constant voltage output for run- ning the LN-7, LN-23P, or LN-25 wire feeders. The optional K924-4 Remote Control Kit (field installed) pro- vides a switch, or K924-5 Remote Control Kits provide a receptacle and a remote control rheostat for remote fine current and open circuit voltage adjustment.

The Classic 300G has an electronic Engine Protection system. In the event of sudden low oil pressure or high coolant temperature, the engine immediately shuts down. The Classic 300G has a current range of 40-350 DC amps with output ratings as follows:

These units are also capable of providing 3 kVA of 115/230 volts of 60 cycle AC auxiliary power.

CAUTION

DO NOT MOUNT OVER COMBUSTIBLE SURFACES. Where there is a combustible surface directly under stationary or fixed electrical equipment, the surface shall be covered with a steel plate at least

.06”(1.6mm) thick, which shall extend not more than 5.90”(150mm) beyond the equipment on all sides.

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The Classic 300G uses the GM 3.0L industrial water- cooled gasoline engine.

RATED OUTPUT			DUTY CYCLE
250A	@	30V	100%
300A	@	32V	60%

DESIGN FEATURES

Control Panel

Both the engine and the welder controls are located on one recessed panel at the exciter end of the machine. The welder controls consist of a five step “Current Range Selector” switch and a “Fine Current Adjustment” rheo- stat. The welder is equipped with a “Start” button, an “Ignition” switch, an “Idler” control switch, and a “Glow Plug” button for easier cold weather starting.

The control panel also contains an engine temperature gauge, a battery charging ammeter, an oil pressure gauge, two three prong grounding type receptacles and four circuit breakers for auxiliary power.

All Copper Windings - For long life and dependable operation.

Engine Idler Control - The Classic 300G is equipped with an electronic automatic engine idle control. It auto- matically increases and decreases engine speed when starting and stopping welding or using auxiliary power. A built-in time delay permits changing electrodes before the engine slows to its low idle speed. The “Idler” control switch on the panel locks the idler in high idle position when desired.

Auxiliary Power - 3.0 kVA of nominal 115/230V, 60Hz, AC. Output voltage is maintained within ± 10% at all loads up to rated capacity. (See Optional Features for Power Plug Kit.)

Welder Enclosure - The complete welder is rubber mounted on a rugged steel “C” channel base.

The output terminals are placed at the side of the machines so that they are protected by the door. The output terminals are labeled (+) and (-).

Cranking System - A 12 volt electric starter is standard.

CLASSIC 300G