Enclosed robust case design protects internal components from impact and allows air flow to cool and prolong the life of the engine. High coolant temperature and low oil pressure shutdown indicators.ĭesigned and built with reliable, heavy-duty industrial components that allow operation in remote locations, without downtime.Fuel gauge & low fuel shutdown indicator.Hours left before an oil change is due.Prior Big Blue 302 owners now have a choice between the Big Blue 400 or the PRO 300. Engine is warranted separately by engine manufacturer.Every component in a Miller industrial engine drive is engineered and built to assure ultimate reliability in the most punishing conditions. Welder/generator is warranted by Miller for 3 years, parts and labor.

The Vault - ultimate control board reliability. 3-phase, rotating-field welding generator requires less fuel and horsepower to operate. See page 3 for more machine features/benefits. Thermal overload protection prevents machine damage if the duty cycle is exceeded or airflow is blocked. In economy mode with 71.5 dBa at 23 ft (7 m), it’s quieter than most competitive models, improving work site communication and safety. The Big Blue 400 Eco Pro is up to 44% smaller and 41% lighter than other models - taking less room and reducing transportation costs.

Low fuel shutdown - engine shuts down before system runs out of fuel, making restarts easy.

High coolant temperature and low oil pressure shutdowns.

Meets tough EPA Tier 4i compliance standards. The fuel savings really add up when running day-after-day, while producing fewer carbon emissions.

Output of the engine matches the power required, saving operating cost and the environment. Designed to be up to 25% more fuel-efficient during typical welding operations than other models. An Eco-nomical and Eco-friendly alternative. Operator-friendly control panel is simplified with colorcoded terminals to get you connected quickly and correctly. MIG and Flux Cored arc performance Simple operation.Heavy-duty industrial engine is designed to operate over 10,000 hours before the first basic overhaul. ED/5.3 Heavy Industrial Applications Quick Specs Output Range Stick (SMAW) MIG (GMAW) Flux Cored (FCAW) DC TIG (GTAW) Air Carbon Arc (CAC-A) thru 5/16 in (8 mm) carbons Pipe Welding Structural General Fabrication Maintenance and Repair Rental Fleets Diesel Engine-Driven Welder/AC Generator DC CAC-A 20 – 500 A DC Stick 20 – 450 A DC TIG 20 – 450 A MIG/FCAW 14 – 40 V Generator Output Rated at 104˚F (40˚C) 5500 Watts Peak, 4000 Watts Continuous Accu-Rated™ Not Inflated – Generator Power The Big Blue 400 Eco Pro is a rugged, compact, fuel-efficient diesel welder/generator that’s Eco-friendly and Eco-nomical.

Miller big blue 400 manual