User manual for Miller's Big Blue 400 Pro diesel welder and AC generator, covering controls, features, specs, and safety.
The Miller Big Blue 400 Pro is a diesel engine-driven welder and AC generator designed for heavy industrial use. It supports multiple welding processes including stick, MIG, FCAW, TIG, and pulsed MIG. Key features include ArcReach® remote control technology for hands-free operation, digital meters with SunVision™ for clear parameter viewing, and a powerful 10,000-watt generator. The unit is built for durability with HD powder coat and comes with engine options like Caterpillar C1.5, Kubota V1505, and Mitsubishi S4L2. It includes safety features like low OCV stick and thermal overload protection.
| Weld Output Range (DC Stick) | 20–400 A |
|---|---|
| Generator Output (Continuous) | 10,000 watts |
| Engine Type | Diesel |
| Dimensions (H x W x D) | 32 in. x 26.25 in. x 56 in. |
| Net Weight (Kubota) | 950 lb. (431 kg) |
| Welding Processes | Stick (SMAW), MIG (GMAW), Flux-cored (FCAW), RMD®, Pulsed MIG (GMAW-P), DC TIG (GTAW), Air carbon arc (CAC-A) |
It supports Stick (SMAW), MIG (GMAW), Flux-cored (FCAW), RMD®, Pulsed MIG (GMAW-P), DC TIG (GTAW), and Air carbon arc (CAC-A).
It provides 12,000 watts peak and 10,000 watts continuous output.