LINCOLN ELECTRIC introduced two high-efficiency, EPA Tier 4-compliant diesel engine-driven welders, noting the machines are “ideal for pipeline, construction, and maintenance welding applications. The new Classic® 300 HE and SAE-300® HE diesel welders combine the excellent performance of the traditional, pure DC generator with a rugged, robust design.

The pure DC generator welding output produces the welding arc preferred by pipeline operators and contractors, and provide precise arc control for stick, TIG, MIG, flux-cored, and gouging processes in demanding code applications.

Both models deliver 3,000 total watts of AC power from a 120V or 240V duplex receptacle for power tools and lights, and both fuel-efficient units feature 3-cylinder, water-cooled, 1,800-RPM engines.

The Classic 300 HE offers the Kubota® D1503 engine, while the SAE-300 HE offers a choice between the Kubota D1503 and soon the Perkins® 403F-15T. The Kubota engine delivers 15% fuel savings at 300A at low idle versus the previous Classic 300 D model. The Perkins engine will deliver 13% savings at 300A and 20% at low idle versus the previous SAE-300 model.

These compact units can be installed easily on truck beds, and have fuel gauges on the control panel to easily monitor fuel levels, with additional engine gauges to indicate oil pressure and engine temperature. An electronic engine idler extends engine life and reduces fuel consumption.

“All day welding” is possible thanks to a 16-gallon (60.6 liter) plastic fuel tank, according to Lincoln Electric.

Notable features of the Classic 300 HE engine include:
•  300 amps output at 60% duty cycle, with maximum output of 350 amps
•  Arc gouging up to 3/16-inch (4.7 mm) carbons
•  Five current ranges with overlap and fine-tuning within each range
•  All-copper windings of the rotating armature/field coil system enhance arc stability, dependability and long life.

The SAE-300 HE design includes:
•  300 amp-rated at 60% duty cycle with Dual Continuous Control to allow precise setting of both voltage and current
•  390 amp maximum output
•  Arc gouging up to 1/4-inch (6.3 mm) carbons
•  All-copper windings of the rotating armature/field coil system enhance arc stability, dependability and long life.

Both new diesel engine drives’ engine control units (ECU) are in a sealed housing for robust environmental shielding, with single-side engine access for easy routine maintenance. Both have glow plugs for cold-weather starting, automatic shutdown protection for low oil pressure or high water temperature with indicator lights for both functions, as well as one for the battery charging system.