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Miller Big Blue® 400 PipePro® (Mitsubishi) Blue w/Wireless Interface Control - 907805001


Meet the Miller Big Blue® 400 PipePro® (Mitsubishi) Diesel Engine Driven Welder/Generator – a pipeline welding powerhouse. With a 20-400 A range, DC precision, and wireless control, it’s your go-to for 1/4-inch carbon welding. Featuring a T4F-compliant Mitsubishi engine, 11.5 gal tank, and 24.7 hp, it delivers unmatched performance. Compact at 26.25x32x56 inches, this stainless steel beauty weighs 993 lbs, ensuring durability and ease of use. Elevate your welding game with the Big Blue® 400 PipePro® – where power meets precision seamlessly.


Gtin 715959685078 SKU: 907805001 Categories: , , Tags: , ,

Miller Big Blue® 400 PipePro® Diesel Engine-Driven Welder -907805001

Introducing the Miller Big Blue® 400 PipePro® Diesel Engine-Driven Welder – Your Ultimate Solution for Heavy Industrial Welding!

Designed for the transmission pipeline welder, the Big Blue 400 PipePro is a powerhouse, offering superior performance in Stick (SMAW), MIG (GMAW), Flux-cored (FCAW), RMD®, Pulsed MIG (GMAW-P), DC TIG (GTAW), and Air Carbon Arc (CAC-A) processes. Rated for 1/4-inch (6.4 mm) carbons, it also supports Air Plasma Cutting and Gouging with optional Spectrum® models.


  • Stick (SMAW)
  • MIG (GMAW)*
  • Flux-cored (FCAW)*
  • RMD®**
  • Pulsed MIG (GMAW-P)**
  • Air carbon arc (CAC-A)


  • 1/4-inch (6.4 mm) carbons

Heavy Industrial Applications

  • Cross-country pipeline
  • Process pipe welding

Output Range

  • DC stick: 20–400 A
  • MIG/flux-cored: 14–40 V
  • DC TIG: 20–400 A

Auxiliary Output

  • Rated at 104°F (40°C)
  • 12,000 watts peak, 10,000 watts continuous


  • Heavy-duty low-speed T4F industrial diesel engines designed to operate over 10,000 hours before the first basic overhaul.
  • Backed by worldwide support and service.
  • Mitsubishi S4L2 four-cylinder diesel.

Quick Specs

  • Also available with stainless steel enclosure. See page 8.
  • Designed for the transmission pipeline welder.
  • Superior downhill stick arc characteristics, MIG/flux-cored capabilities.
  • Meets high-strength steel requirements for demanding pipeline jobs.

Features and Controls

  • Arc control with Dynamic DIG for fine-tuning in stick modes.
  • Standard 14-pin receptacle with Auto-Remote Sense™ for simple connection of remote controls and wire feeders.
  • Low OCV stick (VRD) for increased operator safety.
  • LINE-X® top cover for superior impact, corrosion, and abrasion protection.
  • Thermal overload protection prevents machine damage.
  • Optional stainless steel enclosure for enhanced durability.
  • Digital meters with SunVision™ technology for clear visibility in any angle.
  • 10,000 watts of pure auxiliary power.


ArcReach® Technology

  • Parameter control at the wire feeder or pendant without needing a control cord.
  • Allows changing weld settings remotely, saving time and effort.
  • Compatible with ArcReach accessories.

Dynamic DIG™ Technology

  • Ultra-adaptive arc control for optimized metal deposition.
  • Tailorable and user-friendly arc to match application, material, fit-up, and welder technique.

Wireless Interface Control

  • Full control of the machine in the palm of your hand.
  • Remote process and parameter changes for increased efficiency.
  • Programmable weld settings for customization.
  • Factory installed on all Big Blue 400 PipePro machines.


Optimized Processes for Pipeline Welding

  • Tailored arc and increased deposition rates.
  • Dynamic DIG offers flexibility in arc characteristics and penetration control.
  • Advanced processes available with ArcReach® Smart Feeder for improved quality and productivity.

Built for the Welding Rig

  • Smallest, lightest, and most powerful welder in its class.
  • Less wear and tear on the truck chassis.
  • LINE-X® top cover and optional stainless steel enclosure for added durability.

Easily Update Technology

  • Industrial USB port for easy software updates and downloading machine log files.
  • Retrieve in-depth information for diagnostics and statistics.

Jobsite Safety

  • Reduce the need to walk back to or climb into the truck bed.
  • ArcReach® technology and wireless interface control provide parameter control and front panel control remotely, minimizing jobsite hazards.

Performance Data

Engine Specifications (Engines warrantied separately by the engine manufacturer.)

  • Caterpillar C1.5T and Mitsubishi S4L2 options.
  • EPA Tier 4 Final compliant.
  • Optimized arc control for stick welding applications.

Fuel Consumption Curve

  • Efficient fuel consumption for cost-effective operation.

DC Weld Amperes at 100% Duty Cycle

  • Idle and simultaneous welding and power scenarios.

Weld Amperes Total Aux. Power Available (Watts)

  • Detailed breakdown for different welding scenarios.

Weld Mode/Process

  • CC/DC (TIG and Stick)
  • Weld Output Range: 20–400 A (TIG and Stick), 14–40 V (FCAW/MIG)
  • Weld Output Rated at 100% Duty Cycle at 104°F (40°C): 300 A at 32 VDC, 350 A at 27 VDC, 400 A at 24 VDC
  • Max. Open-Circuit Voltage: 85 VDC
  • Auxiliary Power Output Rated at 104°F (40°C): 12,000 watts peak, 10,000 watts continuous

Dimensions and Net Weight

  • Compact size and weight for mobile welding rigs.
  • Various dimensions provided for accurate placement.

Sound Levels

  • Idle and weld sound levels for quiet operation.

Ordering Information

  • Model options for CAT and Mitsubishi engines with different finishes.
  • Various accessories available for customization.

Note: Specifications and features subject to change without notice. Check the official Miller Electric Mfg. LLC website for the most up-to-date information.


  • Engine-driven welder is warrantied for three years, parts and labor.
  • Engine is warrantied separately by the engine manufacturer.

Big Blue® 400 PipePro® (Mitsubishi) – Stainless Steel with Wireless Interface Control


  • Regulated Metal Deposition (RMD)

General Specifications:

  • Title: Big Blue® 400 PipePro® (Mitsubishi) Stainless Steel w/Wireless Interface Control
  • Industries Interests: Pipeline
  • Amperage: 20 A – 400 A
  • Rated Carbon Diameter: 1/4 in (6.4 mm)
  • Current Type: DC
  • Max Open Circuit Voltage: 85 VDC
  • Cold Weather Starting Aids: Engine Block Heater
  • Engine Brand: Mitsubishi
  • Engine Compliance: T4F
  • Engine Idle Speed: 1500 RPM
  • Engine Weld Speed: 1800 RPM
  • Fuel Tank Size: 11.5 gal.
  • Fuel Type: Diesel
  • Horsepower: 24.7 hp
  • Weld Output: CC/CV
  • Rated Output: 300 A at 32 VDC, 350 A at 27 VDC, 400 A at 24 VDC
  • Single Phase Auxiliary Continuous Power: 10,000 W
  • Single Phase Auxiliary Peak Power: 12,000 W
  • Sound Rating: Idle: 68.7 dB (93 Lwa) / Weld: 72.1 dB (97 Lwa)
  • Net Width: 26.25 in
  • Net Height: 32 in
  • Net Length: 56 in
  • Net Weight: 993 lbs
  • Wireless Interface Control remote



  • Weld leads
Gtin 715959685078 SKU: 907805001 Categories: , , Tags: , ,
Weight 993 lbs
Dimensions 56 × 26.25 × 32 in

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