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Komatsu HM300-5

Name: Komatsu HM300-5
Brand: Komatsu

Configuration: Standard 17.1 m³ (SAE 2:1 heaped) body, 23.5R25 tires; EPA Tier 4 Final

22 sourced values · Sources: Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25

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Dimension diagram

A	Overall length	10,275 mm
B	Overall height	3,620 mm
C	Wheelbase	4,100 mm
D	Ground clearance	575 mm
E	Overall width	2,900 mm
F	Track gauge / tread	2,280 mm

Weights

Spec	Value	Source
Operating weight	25,395 kg	Published: 25,395 kg Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Empty weight (55,986 lb).
Max gross (laden) weight	53,475 kg	Published: 53,475 kg Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Gross vehicle weight (117,892 lb).

Dimensions

Spec	Value	Source
Overall length	10,275 mm	Published: 10,275 mm Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Dimension drawing (33'8").
Overall width	2,900 mm	Published: 2,900 mm Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Front-view width on the dimension drawing (9'6"). Width across mirrors 3,567 mm.
Overall height	3,620 mm	Published: 3,620 mm Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Highest side-view dimension on the drawing (11'11"); a second height of 3,510 mm is also shown. Body raised: 6,440 mm.
Wheelbase	4,100 mm	Published: 4,100 mm Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Front axle to first rear axle, from the drawing. Rear tandem spacing 1,710 mm.
Track gauge / tread	2,280 mm	Published: 2,280 mm Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Tread, front view of drawing.
Ground clearance	575 mm	Published: 575 mm Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Vertical dimension under the centre hitch on the drawing (1'11").
Turning radius	8,100 mm	Published: 8,100 mm Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Minimum turning radius, wall to wall, 8.10 m (drawing R8,100 mm).

Undercarriage / tires

Spec	Value	Source
Undercarriage type	Wheeled, articulated (6 x 6)	Published: Wheeled, articulated (6 x 6) Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Full-time all-wheel drive with K-TCS; hydro-pneumatic front suspension.
Number of axles	3	Published: 3 Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25
Wheels (count)	6	Published: 6 Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25
Tire size	23.5R25	Published: 23.5R25 Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 750/65R25 optional.

Ground pressure

Spec	Value	Source
Ground pressure	Not published	Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Not published in the brochure.
Ground pressure, loaded (highest axle)	Not published	Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Not published in the brochure.

Axle loads

Spec	Value	Source
Axle load, front (unladen/operating)	Not published	Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Not published in kg; empty weight distribution front 58.9 %, centre 22.5 %, rear 18.6 %.
Axle load, rear (unladen/operating)	Not published	Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Not published in kg (distribution only).
Axle load, front (laden/max)	Not published	Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Not published in kg; loaded distribution front 30.8 %, centre 36.0 %, rear 33.2 %.
Axle load, rear (laden/max)	Not published	Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Not published in kg (distribution only).

Engine

Spec	Value	Source
Engine model	Komatsu SAA6D125E-7	Published: Komatsu SAA6D125E-7 Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 EPA Tier 4 Final.
Net power	242 kW	Published: 242 kW Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 ISO 9249 / SAE J1349 (324 HP).
Gross power	248 kW	Published: 248 kW Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 SAE J1995 (332 HP).
Displacement	11 L	Published: 11 L Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25
Rated speed	2,000 rpm	Published: 2,000 rpm Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25

Hydraulics

Spec	Value	Source
Pump / aux flow	Not published	Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Not published in the brochure.
System / relief pressure	30.4 MPa	Published: 30.4 MPa Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Hoist circuit (4,409 psi).

Performance

Spec	Value	Source
Max travel speed	58.6 km/h	Published: 58.6 km/h Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Maximum (36.4 mph).
Rated payload	28,000 kg	Published: 28,000 kg Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 28.0 metric tons (30.9 US tons).
Body capacity (heaped)	17.1 m³	Published: 17.1 m³ Komatsu HM300-5 specifications brochure, AESS870 (file version 0326-V4; printed code AESS870-0225), EPA Tier 4 Final. Retrieved 2026-10-25 Heaped SAE 2:1 (22.4 yd³). Struck 13.4 m³.

Similar models

Brand	Model	Operating weight
Caterpillar	735	24,710 kg
Liebherr	TA 230 Litronic	≈ 24,585 kg
Volvo	A30G	23,600 kg
Caterpillar	730	23,510 kg
Develon	DA30-7	23,300 kg
Caterpillar	725	23,110 kg

Compare side by side with Caterpillar 735 and Liebherr TA 230 Litronic