Komatsu HM300-5 Off-Highway Truck Specs

Category: Off-Highway Trucks ➔
Manufacturer: Komatsu ➔
Model: HM300-5 ➔

Komatsu HM300-5 is a rigid-frame off-highway haul truck designed for earthmoving, quarry, and mining applications. It is part of Komatsu's HM series and is commonly used for transporting large volumes of material over rough terrain. The HM300-5 features a high-capacity dump body, articulated steering, and all-wheel drive for traction on uneven ground. It is powered by a Komatsu diesel engine and built for durability, service access, and operator comfort. Typical uses include site development, road construction, aggregate handling, and bulk material transport in demanding off-road environments.

General Specifications

Komatsu HM300-5 Off-Highway Truck General Specifications specifications
Articulated/Rigid	Articulated — Starting 2024 Model Year
Drive Configuration	6WD — Starting 2019 Model Year
Drive System Mech/Electr.	Mech — Starting 2025 Model Year
Engine Type	Komatsu SAA6D125E-7 — Starting 2019 Model Year
Mfg. Model	HM300-5 — Starting 2019 Model Year
Off-Highway Trucks	Off-Highway Trucks — Starting 2025 Model Year
Operating Weight	117,892.00 lbs (53,474.98 kg) — Starting 2019 Model Year
Rated Payload	30.9+E6 — Starting 2021 Model Year

Dimensions

Komatsu HM300-5 Off-Highway Truck Dimensions specifications
Dump Ground Clearance	2.00 ft (0.61 m)
Dump Height	21.13 ft (6.44 m)
Ground Clearance	1.89 ft (0.58 m)
Overall Height	11.88 ft (3.62 m)
Overall Length	33.72 ft (10.28 m)
Overall Width	9.52 ft (2.90 m)
Wheelbase	13.46 ft (4.10 m)

Dump

Komatsu HM300-5 Off-Highway Truck Dump specifications
Capacity - Heaped	22.37 cu yd
Capacity - Struck	17.53 cu yd
Rated Payload	56,000.06 lbs (25,401.23 kg)

Engine

Komatsu HM300-5 Off-Highway Truck Engine specifications
Bore	5.00 in (12.70 cm)
Displacement	673.80 cu in (11,041.63 cu cm)
Engine Make	Komatsu
Engine Model	SAA6D125E-7
Gross Power	332.60 hp (248.02 kw)
Max Torque	1.30 lbs ft (1.76 nm)
Net Power	324.60 hp (242.06 kw)
Number Of Cylinders	6
Power Measured @	2000 rpm
Stroke	6.00 in (15.24 cm)

Hydraulic System

Komatsu HM300-5 Off-Highway Truck Hydraulic System specifications
Hoist Cylinder	Twin, 1-stage type
Hoist Time	10.5
Relief Valve Pressure	4264.2 psi

Operational

Komatsu HM300-5 Off-Highway Truck Operational specifications
Def Tank Capacity	18.90 gal (71.54 l)
Engine Oil Capacity	9.30 gal (35.20 l)
Fuel Capacity	102.50 gal (387.96 l)
Hydraulic System Fluid Capacity	27.30 gal (103.33 l)
Tire Size	23.5 R25
Transmission Fluid Capacity	25.90 gal (98.03 l)

Transmission

Komatsu HM300-5 Off-Highway Truck Transmission specifications
Max Speed	36.50 mph (58.74 kph)
Number Of Forward Gears	6
Number Of Reverse Gears	6
Transmission Type	Full-automatic, Counter-shaft type

Weights

Komatsu HM300-5 Off-Highway Truck Weights specifications
Center Axle - Empty	22.5 %
Center Axle - Loaded	36 %
Front Axle - Empty	59 %
Front Axle - Loaded	31 %
Rear Axle - Empty	18.5 %
Rear Axle - Loaded	33 %
Total Empty	56.00 lbs (25.40 kg)
Total Loaded	117.90 lbs (53.48 kg)

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