Komatsu America’s HD785-8 rigid frame off-highway haul truck, with a Tier 4 Komatsu SAA12V140E-7 engine, has the highest in-class net horsepower, 1,140 HP (849 kW) in North America. With a payload capacity of 101.6 U.S. (short) / 92.2 metric tons, it’s built for mining, quarry, and aggregates.
With a tight turning radius of 33’ 2”, the HD785-8 provides exceptional maneuverability when spotting to be loaded and positioning to dump. The Komatsu Traction Control System (KTCS) is standard on the HD785-8. KTCS automatically applies pressure to independent brake assemblies for optimum traction in various ground conditions, without the need for differential lock-up, so steering performance is not compromised.
KomVision all-around machine monitoring system provides the operator with a bird’s-eye view of the working area on a dedicated monitor in the dash (separate monitor from the rearview monitoring system).
The HD785-8 has a 7-speed, fully automatic transmission with two selectable reverse speeds. The Komatsu Advanced Transmission with Optimum Modulation Control System (K-ATOMiCS) ensures smooth clutch engagement for a comfortable ride and reduced material spillage.
The Automatic Retard Speed Control (ARSC) automatically maintains a selected downhill travel speed (rather than engine RPM) to let operators keep their focus on the haul road.
- Standard diagonal access stairway provides easy access to cab and deck.
- Additional ladders with gates and handrails on the right-hand and left-hand side provide secondary egress.
- LED lighting package provides excellent visibility in various working conditions.
- The Tier 4 Final after treatment solutions utilizes dual Komatsu Diesel Particulate Filters (KDPF) – most regeneration is performed passively, with no action required of the operator and no interference with machine operation.
- No Selective Catalytic Reduction (SCR), therefore Diesel Exhaust Fluid (DEF) is not a required consumable fluid.
- Auto Idle Shutdown helps reduce unnecessary idle time and lowers operating cost.
In-Cab Enhancements/Features
- New, air-suspension, heated and ventilated operator seat and upgraded trainer seat provide a comfortable ride.
- KOMTRAX Plus telematics system and upgraded machine monitor provide key machine metrics for utilization, production and machine health.
- Rearview monitoring system located on a dedicated monitor in the upper right-hand corner of the cab.
- Auto Idle Setting System (AISS) adjusts engine idle speed based on coolant temperature for reduced machine warm-up time.
