2025 Komatsu Trucks HM300-5

Information

2025 Komatsu Trucks HM300-5

Durability and performance in one

When it comes to maximizing your productivity, the HM300-5 delivers maneuverability, comfort and durability in one — even in harsh conditions. Automated powertrain features allow consistent cycle times from all operator experience levels.

Features may include:

Komatsu Traction Control System
  • Monitor and adjust to changing conditions. Komatsu Traction Control System (KTCS) is designed to provide excellent machine performance in soft and slippery ground conditions without sacrificing steering performance.
Maximize transmission life
  • Powerful acceleration, smooth down shifting and synchronized engine speed. The K-ATOMiCS transmission features a six-speed, fully automatic transmission with an advanced electronic system to reduce shift shock and torque cutoff for exceptional efficiency.
Greater confidence when traveling downhill
  • Increase operator confidence when traveling down hill through large capacity, continuously cooled, wet multiple-disk brakes that also function as a highly responsive retarder with 526 horsepower absorption capacity.
Smooth ride over rough terrain
  • Discover a smooth ride over the rough terrain with front and rear axle hydro-pneumatic suspensions. The rear axles are mounted on a dynamic equalizer structure and the entire system is designed to help reduce operator fatigue while offering a comfortable ride.
Comfortable operator environment
  • Improved cab entry in front of the front axle. A curved front dash panel. Thoughtful design enhancements throughout the cab provide the operator excellent visibility and a large, quiet environment to promote productivity and comfort.

Photos

Highlights

  • Bushnell, Florida
  • 2025
  • Komatsu
  • Trucks HM300-5
  • Model: SAA6D125E-7
  • Full-automatic, counter-shaft type | Torque converter: 3-elements, 1-stage, 2-phase | Speed range: 6 speeds forward and 2 reverse | Lockup clutch: Wet, single-disc clutch | Forward: Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears | Reverse: Torque converter drive and direct drive in all gear | Shift control: Electronic shift control with automatic clutch modulation in all gear
  • Available
  • Target area: 8 ft. 10 in

Specifications

  • 2025
  • Komatsu
  • Trucks
  • HM300-5
  • General
  • Model: SAA6D125E-7
  • Komatsu
  • SAE J1995: 332 HP | ISO 9249 / SAE J1349: 324 HP
  • 1,237 ft.-lbs.
  • 2,000 rpm
  • Water-cooled
  • 4-cycle
  • Turbo-charged, after-cooled, cooled EGR
  • 6
  • 4.92 in
  • 5.91 in
  • Piston: 671 in3
  • Method: Gear pump, force-lubrication | Filter: Full-flow type
  • Dry type with double elements and precleaner, plus dust indicator
  • Direct injection
  • Electronically controlled
  • Full-automatic, counter-shaft type | Torque converter: 3-elements, 1-stage, 2-phase | Speed range: 6 speeds forward and 2 reverse | Lockup clutch: Wet, single-disc clutch | Forward: Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears | Reverse: Torque converter drive and direct drive in all gear | Shift control: Electronic shift control with automatic clutch modulation in all gear
  • Type: Articulated type, fully hydraulic power steering with two double-acting cylinders | Supplementary: Automatically actuated, electrically powered | Standard: ISO5010, SAE J1511
  • Front: Hydro-pneumatic suspension | Rear: Combined hydro-pneumatic and rubber suspension system
  • Service: Full-hydraulic control, oil-cooled multiple-disc type on front and center axles | Retarder: Front and center axle brakes act as retarder
  • Spring applied, caliper disc type
  • 23.5 R25
  • 23.5 R25
  • Axles Ratios: Differential 3.154 / Planetary 4.667 | Weight distribution Empty: (Front axle: 58.9% | Center axle: 22.5% | Rear axles: 18.6% ) | Weight distribution Loaded: (Front axle: 30.8% | Center axle: 36.0% | Rear axles: 33.2%)
  • Transmission Maximum travel speed: 36.4 mph
  • Hoist cylinder: Twin, telescopic type | Hoist time: 10.5 s
  • Material - high tensile strength steel: 184,925 psi | Relief pressure: 4,264 psi
  • Articulated type, box-sectioned construction on front and rear Connected by strong torque tubes.
  • Material thickness: 0.55 in | Material thickness Front: 0.31 in | Material thickness Sides: 0.47 in
  • ISO3449 (FOPS) / ISO3471 (ROPS)
  • Steering Articulation angle: 45° each direction
  • Steering Minimum turning radius, wall to wall: 26 ft. 7 in
  • Target area - inside: 17 ft. 3 in
  • Target area: 8 ft. 10 in
  • 16.9: 17.5 yd3
  • (2:1, SAE): 22.4 yd3
  • 30.9 US tons
  • Tank: 102.5 US gal | DEF tank: 8.7 US gal | Differentials (total): 18.9 US gal | Final drives (total): 6.1 US gal | Suspension (total): 2.7 US gal
  • Engine: 9.2 US gal
  • Torque converter, transmission and retarder cooling: 21.1 US gal
  • system: 27.2 US gal
  • Empty: 55,986 lbs.
  • 117,892 lbs.
  • Axles Final drive type: Planetary gear