The HD325-8 and HD405-8 are off-highway trucks that have increased horsepower with a new Komatsu Traction Control System (KTCS). The horsepower has increased to a net of 514 HP (383 kW) which includes fuel saving technology that reduced consumption 9 percent on the HD325-8 and 6 percent on the HD408-5. The KTCS sutomatically applies independent brake assemblies to achieve optimum traction in varying ground conditions to increase productivity.
These two models have a payload capacity of 40.3 U.S. (short)/36.5 metric tons and 44.1 U.S. (short)/40 metric tons and replace their previous models, HD325-7 and HD405-7. The ladder configuration has been replaced with a sloped stairway and handrails for easier access. The sizes of the trucks have also been increased from 18.00 R33 to 21.00 R33.
Other new standard features for both truck models include a quiet 78 dB(A) cab, 7-in. LCD color monitor, dedicated rearview monitor, fast-fill fuel system, and a premium heated and ventilated operator’s seat with air suspension.
Standard features of the new HD325-8 AND HD405-8 include:
Tier 4 Final Certified Engine Technology
- The powerful SAA6D140E-7 engine provides a gross power rating of 518 HP (386 KW).
- The hydraulically actuated Exhaust Gas Recirculation (EGR) and Variable Geometry Turbocharger (VGT) ensure precise operation and quick engine response.
- Maintenance of Tier 4 Final engines is simplified with enhanced monitor panel capability and service features.
- KOMTRAX and the monitor panel provide critical information for easy monitoring and key data for production management.
- Komatsu Diesel Particulate Filter (KDPF) and Selective Catalytic Reduction (SCR) are designed in conjunction with the engine for efficiency and long life.
- More than 98 percent of KDPF regeneration is performed passively, with no action required of the operator and no interference with machine operation.
- Power and Economy modes allow the operator to optimize the performance required for operation.
New In-Cab Enhancements/Features
- Air-suspension, high-back, ventilated and heated seat softens machine vibrations for added operator comfort and cast frame members increase strength.
- 7-in., full color, high resolution monitor delivers a sharp picture and vivid colors, even in harsh light.
- Komatsu Auto Idle Shutdown can reduce idle time and save fuel.
- Separate, full color, rearview monitor with improved line-of-sight.
- Pioneering KOMTRAX telematics system and monitor provide key machine metrics, including KDPF status and fuel consumption. Performance information can be collected and sorted by operator ID.
- Auxiliary jack and two 12 volt ports.
Additional Features/Benefits
- New angled front access stairs with handrails are now standard for both sides of the machine.
- Tight turning radius with MacPherson strut front suspension.
- Hydropneumatic suspension system for a smooth ride.
- New Komatsu Traction Control System (KTCS) automatically provides optimum traction in all ground conditions without operator input.
- Komatsu Advanced Transmission with Optimum Modulation Control System (K-ATOMiCS) adjusts shifting performance according to demand for a more comfortable ride and reduced material spillage.
- Automatic Retard Speed Control (ARSC) automatically maintains a selected downhill travel speed (rather than engine RPM) that is appropriate for the grade.
- Enhanced Komatsu integrated payload meter (PLM) data is available on the machine monitor and remotely via the web.
- New ground level accessible battery box for easy maintenance.
