Construction Equipment Guide
470 Maryland Drive
Fort Washington, PA 19034
800-523-2200
Komatsu HM400-5 is an articulated off-highway truck designed for hauling material in mining, quarry, and large earthmoving applications. It features a 40-ton class payload capacity, all-wheel drive, and a Komatsu diesel engine paired with an automatic transmission for efficient operation on rough terrain. The HM400-5 includes a rigid frame, articulated steering, and a suspension system intended to support stability and traction on uneven haul roads. Common uses include aggregate transport, site development, and bulk material handling. The model is part of Komatsu's HM series of off-highway trucks used in heavy-duty construction and production hauling environments.
| Articulated/Rigid | Articulated Starting 2024 Model Year |
| Drive Configuration | 6WD Starting 2019 Model Year |
| Drive System Mech/Electr. | Mech Starting 2025 Model Year |
| Engine Type | Komatsu SAA6D140E-7 Starting 2019 Model Year |
| Mfg. Model | HM400-5 Starting 2019 Model Year |
| Off-Highway Trucks | Off-Highway Trucks Starting 2025 Model Year |
| Operating Weight lbs (kg) | 165,644 (75,135) Starting 2019 Model Year |
| Rated Payload Tons (Metric Tons) | 44.1 (40) Starting 2019 Model Year |
| Articulating/Rigid | Articulated |
| Drive Config | 6WD |
| Rated Payload | 44.10 t (44,100.00 kg) |
| Make | Komatsu |
| Operating Weight | 165,644.00 lbs (75,134.95 kg) |