Dump System
| Rated Payload | 61906 lb (28080 kg) |
| Capacity, Struck | 17.5 yd3 (13.4 m3) |
| Capacity, Heaped | 22.4 yd3 (17.1 m3) |
| Dump Angle | 70° |
| Dump Height | 253.5 in (6440 mm) |
| Dump Ground Clearance | 23.9 in (607 mm) |
| Raise Time | 10.5 sec |
| Material Thickness, Bottom | 0.55 in (14 mm) |
| Material Thickness, Front | 0.31 in (8 mm) |
| Material Thickness, Sides | 0.47 in (12 mm) |
| Target Area (inside length x width) | 206.7 x 105.7 in (5250 x 2685 mm) |
| Body Heating | Exhaust heating (option) |
Dimensions
| Overall Length | 404.5 in (10275 mm) |
| Overall Height | 142.5 in (3620 mm) |
| Height to Top of Cab | 138.2 in (3510 mm) |
| Wheelbase | 161.4 in (4100 mm) |
| Dump Height | 253.5 in (6440 mm) |
| Dump Ground Clearance | 23.9 in (607 mm) |
| Ground Clearance | 22.6 in (575 mm) |
| Minimum Turning Radius (wall to wall) | 318.9 in (8100 mm) |
| Tire Size (Standard) | 23.5R25 |
| Tire Size (Optional) | 750/65 R25 |
Weights
| Komatsu HM300-1 | Empty | Loaded |
|---|---|---|
| Operating Weight | 55986 lb (25395 kg) | 117892 lb (53475 kg) |
| Front Axle Weight Distribution | 58.9% | 30.8% |
| Center Axle Weight Distribution | 22.5% | 36.0% |
| Rear Axle Weight Distribution | 18.6% | 33.2% |
Engine Details
| Number Of Cylinders | 6 |
| Engine Make | Komatsu |
| Engine Model | Komatsu SAA6D125E-7 |
| Displacement | 671 cu in (11.0 L) |
| Bore | 4.92 in (125 mm) |
| Stroke | 5.91 in (150 mm) |
| Gross Horsepower | 332 hp (248 kw) |
| Net Horsepower | 324 hp (242 kw) |
| Power Measured @ | 2000 rpm |
| Max Torque | 1237 lb ft (1677 Nm) |
| Torque Measured @ | 1400 rpm |
| Lubrication System | Gear pump, force-lubrication |
| Oil Filter | Full-flow type |
| Fan Drive Type | Hydraulic driven |
| Air Cleaner | Dry type with double elements and precleaner, plus dust indicator |
| Fuel System | Direct injection |
| Governor | Electronically controlled |
| Aspiration | Turbocharged (VGT), after-cooled, cooled EGR |
| Emission Standards | US EPA Tier 4 Final + EU Stage V |
Operational Specs
| Empty Weight | 55986 lb (25395 kg) |
| Gross Vehicle Weight | 117892 lb (53475 kg) |
| Payload Capacity | 61906 lb (28080 kg) |
| Operating Voltage | 24 V |
| Alternator | 90 amps |
| Battery | 2x 12 V, 200 Ah |
| Starter | 24 V, 10 hp (7.5 kW) |
| Articulation Angle | ±45° |
| Front Suspension | Hydro-pneumatic suspension |
| Rear Suspension | Combined hydro-pneumatic and rubber suspension system |
Cab
| ROPS | ISO3471 |
| FOPS | ISO3449 Level 2 |
| Noise Level in Cab | 76 dB(A) |
| Rear View | Color rear view camera and monitor + Heated rearview mirrors, LH and RH side |
| Traction Control System | Komatsu Traction Control System (KTCS) |
| Electrical Outlets | 2x DC 12 V electrical outlets |
| HVAC | Air conditioner/Heater/Defroster |
| Operator Seat | Operator seat, reclining, air suspension type with 3-point retractable seat belt, 3 in (76 mm) width lap belt, 2 in (50 mm) width shoulder belt |
| Passenger Seat | Passenger seat with 2-point retractable seat belt, 3 in (76 mm) width |
| Windshield Washer | Windshield washer and wiper, front and rear |
| Working Lights | Work lamps, LH and RH side + Stop, tail, and turn signal lamps (LED) |
Transmission
| Type | Full-automatic F6-R2 transmission with lock-up torque converter & K-ATOMiC shift control |
| Number of Gears | 6F / 2R |
| Max Travel Speed | 36.4 mph (58.6 km/h) |
| Torque Converter | 3-elements, 1-stage, 2-phase |
| 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 |
| Service Brakes | Independent front and center wheel brakes, full-hydraulic control, oil-cooled, multiple-disc type, ISO3450 |
| Parking Brake | Spring applied, caliper disc type |
| Retarder | Front and center axle brakes act as retarder |
Hydraulic System
| Hoist Relief Pressure | 4409 psi (30400 kPa) |
| Hoist Cylinder | Twin, 2-stage telescopic type |
| Steering Cylinder | Two double-acting cylinders |
Service Refill Capacities
| Fuel Tank Capacity | 102.5 gal (388 L) |
| DEF Tank Capacity | 8.7 gal (32.8 L) |
| Engine Oil Capacity | 9.2 gal (35 L) |
| Cooling System Capacity (dry fill) | 17.7 gal (67 L) |
| Cooling System Capacity (refill) | 16.1 gal (61 L) |
| Hydraulic System Capacity | 27.2 gal (103 L) |
| Transmission Oil Capacity (with torque converter and retarder) | 21.1 gal (80 L) |
| Differentials Fluid Capacity (total) | 18.9 gal (71.5 L) |
| Final Drives Fluid Capacity (total) | 6.1 gal (23 L) |
| Suspension Fluid Capacity (total) | 2.7 gal (10.4 L) |
The Komatsu HM300-5 Articulated Dump Truck is a high-performance hauler built to handle demanding off-road applications in construction, mining, and quarry environments. Designed with a powerful Komatsu SAA6D125E-7 Tier 4 Final engine, the HM300-5 delivers exceptional power, fuel efficiency, and reliability. Its 30.9-ton (28 metric tons) payload capacity, advanced traction control system, and high ground clearance make it well-suited for rugged terrains and uneven job sites.
This 6×6 articulated dump truck features Komatsu’s exclusive Traction Control System (K-TCS) for enhanced stability and maneuverability in challenging ground conditions, while the Komatsu Advanced Transmission with Mode Select optimizes performance for various haul road conditions. The spacious, ROPS/FOPS-certified cab includes advanced operator comfort features and an intuitive 7-inch LCD monitor for machine monitoring and diagnostics.
Built for productivity, safety, and easy maintenance, the HM300-5 is a trusted choice for fleets that demand high uptime and reliable load handling across diverse job environments.
