Category : Off-Highway Trucks ➔ Manufacturer : Komatsu ➔ Model : HM300-2 ➔
Komatsu HM300-2 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 HM300-2 features a high-capacity dump body, all-wheel drive, and a suspension system suited to uneven haul roads. It is powered by a Komatsu diesel engine and paired with an automatic transmission for controlled operation. Typical uses include site development, aggregate handling, and bulk material transport. The model is recognized for durability, traction, and productivity in heavy-duty hauling environments.
Axles
Komatsu HM300-2 Off-Highway Truck Axles specifications
Differential
3.154
Planetary
4.667
Body
Komatsu HM300-2 Off-Highway Truck Body specifications
Capacity Struck
16.9 cu yd
Heaped (2:1, Sae)
21.7 cu yd
Heating
Exhaust heating (option)
Material
130 kg/mm2 184,925 psi high tensile strength steel
Material Thickness-Bottom
0.60 in (1.52 cm)
Material Thickness-Front
0.40 in (1.02 cm)
Material Thickness-Sides
0.50 in (1.27 cm)
Payload
27.3 metric tons 30.1 U.S. tons
Target Area
5240 mm x 2685 mm 17\'2\" x 8\'10\"
Brakes
Komatsu HM300-2 Off-Highway Truck Brakes specifications
Parking Brake
Spring applied, caliper disc type
Retarder
Front and center axle brakes act as retarder
Service Brake
Full-hydraulic control, oil-cooled multiple-disc type on front and center axles
Cab
Komatsu HM300-2 Off-Highway Truck Cab specifications
Compliance
Dimensions comply with ISO 3471 ROPS (Roll-Over Protective Structure) standard
Capacities
Komatsu HM300-2 Off-Highway Truck Capacities specifications
Differentials
16.80 gal (63.59 l)
Engine Oil
9.80 gal (37.09 l)
Final Drive
6.30 gal (23.85 l)
Fuel Tank - Diesel
101.50 gal (384.18 l)
Hydraulic System
31.70 gal (119.98 l)
Suspension
2.70 gal (10.22 l)
Torque Converter, Transmission And Retarder Cooling
20.50 gal (77.59 l)
Dimensions
Komatsu HM300-2 Off-Highway Truck Dimensions specifications
Ground Clearance
1.68 ft (0.51 m)
Overall Height
11.55 ft (3.52 m)
Overall Length
34.26 ft (10.44 m)
Overall Width
9.52 ft (2.90 m)
Turning Radius – Outside Minimum
26.09 ft (7.95 m)
Tyre Gauge
7.49 ft (2.28 m)
Electrical System
Komatsu HM300-2 Off-Highway Truck Electrical System specifications
Alternator
24V, 75 Ah.
Batteries
12V, 136 Ah x 2.
Starter Motor
24V, 11.0 kW.
Engine
Komatsu HM300-2 Off-Highway Truck Engine specifications
Air Cleaner
Dry type with double elements and precleaner (cyclonpack type), plus dust indicator EPA Tier 3 and EU Stage 3A emissions certified
Aspiration
Turbo-charged, after-cooled, cooled EGR
Bore
5.00 in (12.70 cm)
Displacement
674.00 cu in (11,044.91 cu cm)
Engine Make
0
Engine Model
Komatsu SAA6D125E-5
Engine Type
Water-cooled, 4-cycle
Fan Drive Type
Mechanical
Fuel System
Direct injection
Governor
Electronically controlled
Gross Power
340.00 hp (253.54 kw)
Lubrication
Method- Gear pump, force-lubrication Filter-Full-flow type
Maximum Torque
174 kg•m 1,259 lb. ft
Net Power
329.00 hp (245.34 kw)
Number Of Cylinders
6
Power Measured @
2000 rpm
Stroke
6.00 in (15.24 cm)
Hydraulic System
Komatsu HM300-2 Off-Highway Truck Hydraulic System specifications
Hoist Cylinder
Twin, 2-stage telescopic type
Hoist Time
12 sec
Relief Pressure
20.6 MPa 210 kg/cm2 2,990 psi
Main Frame
Komatsu HM300-2 Off-Highway Truck Main Frame specifications
Main Frame Type
Articulated type, box-sectioned construction on front and rear Connected by strong torque tubes.
Steering System
Komatsu HM300-2 Off-Highway Truck Steering System specifications
Articulation Angle
45°each direction
Minimum Turning Radius, Wall To Wal
7.96 m 26\'1\"
Steering System Type
Articulated type, fully hydraulic power steering with two double-acting cylinders
Supplementary Steering
Automatically actuated electrically powered
Suspension System
Komatsu HM300-2 Off-Highway Truck Suspension System specifications
Front
Hydro-pneumatic suspension
Rear
Combined hydro-pneumatic and rubber suspension system
Tires
Komatsu HM300-2 Off-Highway Truck Tires specifications
Standard Tire
23.5 R25
Transmission
Komatsu HM300-2 Off-Highway Truck Transmission specifications
Forward
Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears
Lockup Clutch
Wet, single-disk clutch
Reverse
Torque converter drive and direct drive in all gear
Shift Control
Electronic shift control with automatic clutch modulation in all gear
Speed Range
6 speeds forward and 2 reverse
Torque Converter
3-elements, 1-stage, 2-phase
Transmission
Full-automatic, counter-shaft type
Travel Speed
36.40 mph (58.58 kph)
Weights
Komatsu HM300-2 Off-Highway Truck Weights specifications
Center Axle - Empty
23.6 %
Center Axle - Loaded
35.5 %
Empty Weight
53,000.00 lbs (24,040.43 kg)
Front Axle - Empty
55.8 %
Front Axle - Loaded
30.3 %
Gross Weight
113,360.00 lbs (51,419.29 kg)
Rear Axle - Empty
20.6 %
Rear Axle - Loaded
34.2 %
