2025 Komatsu Trucks HD785-8

Information

2025 Komatsu Trucks HD785-8

Power on grade. Exceptional brake-retarding performance.

With a rated payload of 101.6 U.S. tons, the HD785-8 is ready to produce in your mining, quarry, and aggregate applications. The Komatsu SAA12V140E-7 engine provides 1,140 net horsepower for excellent speed-on-grade. Oil-cooled, multiple-disc brakes on the front and rear wheels offer excellent brake-retarding capability when descending grades.

Features may include:

Auto idle shutdown
  • Control unnecessary fuel consumption. When the engine is idling for the set time — adjustable from five to 60 minutes — the auto idle shutdown function automatically stops and applies the parking brake.
Selectable operating modes
  • Your operator can choose between two operating modes: Economy mode to save fuel or Power mode for enhanced performance.
Variable Horsepower Control
  • The Variable Horsepower Control system is designed to deliver you high production with low fuel consumption. It automatically detects whether the machine is loaded or unloaded and selects the best horsepower setting.
Turning radius
  • The MacPherson-strut-type independent front suspension features an A-arm design for wider spacing and easy access to the engine bay. The turning angle is a tight turning radius of 33' 2." The smooth ride helps to reduce material spillage, too.
Wet multiple-disc brakes and retarder
  • Fully hydraulic-controlled wet multiple-disc brakes on all four wheels help promote reliable and stable brake performance. Large-capacity, continuously-oil-cooled, multiple-disc brakes also function as a responsive retarder for operator confidence at higher downhill speeds.

Photos

Highlights

  • Bushnell, Florida
  • 2025
  • Komatsu
  • Trucks HD785-8
  • Full-automatic, planetary type | Speed range: Seven speeds forward and two reverse
  • Available
  • Target area: 16 ft. 11 in
  • at full dump: 33 ft. 1 in

Specifications

  • 2025
  • Komatsu
  • Trucks
  • HD785-8
  • General
  • Komatsu SAA12V140E-7
  • SAE J1995: 1,200 HP | ISO 9249 /SAE J1349: 1,178 HP
  • Maximum: 3,739 ft.-lbs.
  • four-cycle
  • Water-cooled
  • Turbo-charged, after-cooled, cooled EGR
  • 12
  • 5.51 in
  • 6.50 in
  • Piston: 1,860 in³
  • Dry type with double elements, precleaner and evacuator valve
  • EPA Tier 4 Final
  • Direct injection
  • Full-automatic, planetary type | Speed range: Seven speeds forward and two reverse
  • Wet, multiple-disc clutch
  • Electronically controlled
  • Fully hydraulic power steering with two double-acting cylinders | Secondary steering: Automatic/Manual control (Meets ISO 5010 and SAE J1511)
  • Fully hydraulic control, oil-cooled multiple-disc type / Fully hydraulic control, oil-cooled multiple-disc type
  • Spring applied, multiple-disc type
  • Secondary: Manual pedal operation when hydraulic pressure drops below the rated level, parking brake is automatically actuated
  • 27.00 R49
  • 27.00 R49
  • Hoist time: 11.5 s
  • 1,900 rpm| Maximum travel speed: 40.4 mph
  • 2,990 psi
  • Rear suspension: 5 in | Dumping angle: 48° | Material thickness Bottom: 0.75 in | Material thickness Front: 0.47 in | Material thickness Sides: 0.35 in | Front brake: 6,075 in² | Rear break: 11,138 in²| Maximum steering angle: 41° | Front suspension: 1 ft. 0.6 in | Oil stopper: 5.3° | Mechanical stopper: 6.0°
  • 33 ft. 2 in
  • Target area: 23 ft. 2 in
  • Target area: 16 ft. 11 in
  • at full dump: 33 ft. 1 in
  • 52.3 yd³
  • 78.5 yd³
  • Differential: 2.944 | Planetary: 7.235 | Material: 400 brinell hardness high tensile strength steel
  • 101.6 US tons
  • 349.2 US gal
  • Engine: 36.5 US gal
  • system: 101.7 US gal
  • Rated empty vehicle: 162,701 lbs. | Rated gross vehicle: 365,967 lbs. | EMPTY Front axle: 51.5% / Rear axle: 48.5% | LOADED): Front axle: 33.2% / Rear axle: 66.8%