Komatsu D155AX-8

Name: Komatsu D155AX-8
Brand: Komatsu

Configuration: Strengthened SIGMADOZER (dual tilt, power pitch), giant ripper, ROPS cab, 610 mm extreme-service shoes, K-Bogie undercarriage; EPA Tier 4 Final

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Dimension diagram

A	Overall length	8,420 mm
B	Overall height	3,390 mm
C	Track length on ground	3,275 mm
D	Ground clearance	500 mm
E	Overall width	Not published
F	Track gauge / tread	2,140 mm
G	Shoe / track width	610 mm

Weights

Spec	Value	Source
Operating weight	40,506 kg	Published: 40,506 kg Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 89,300 lb. Incl. strengthened SIGMADOZER, giant ripper, ROPS cab, operator, full fuel.
Shipping / tractor weight	32,700 kg	Published: 32,700 kg Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Tractor weight (72,100 lb), incl. ROPS cab, full fuel, operator.

Dimensions

Spec	Value	Source
Overall length	8,420 mm	Published: 8,420 mm Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Dim. F, with SIGMADOZER and giant ripper. With dozer only (blade table): 6,320 mm.
Overall width	Not published	Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Not published: the drawing gives blade width (A, 4,060 mm) and track gauge but no width over tracks.
Overall height	3,390 mm	Published: 3,390 mm Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Dim. J (side view). Front-view height C: 3,385 mm.
Track gauge / tread	2,140 mm	Published: 2,140 mm Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Dim. B (read from the top-view drawing).
Track length on ground	3,275 mm	Published: 3,275 mm Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Dim. E (read from the side-view drawing).
Shoe / track width	610 mm	Published: 610 mm Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Standard extreme-service shoe; max 710 mm. Grouser 80 mm.
Ground clearance	500 mm	Published: 500 mm Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24

Undercarriage / tires

Spec	Value	Source
Undercarriage type	Crawler (steel tracks, K-Bogie)	Published: Crawler (steel tracks, K-Bogie) Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24
Track rollers / shoes per side	7 track rollers, 2 carrier rollers, 42 shoes per side	Published: 7 track rollers, 2 carrier rollers, 42 shoes per side Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24

Ground pressure

Spec	Value	Source
Ground pressure	99.5 kPa	Published: 99.5 kPa Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Operating configuration (1.01 kgf/cm², 14.4 psi). Tractor only: 80.3 kPa.

Engine

Spec	Value	Source
Engine model	Komatsu SAA6D140E-7	Published: Komatsu SAA6D140E-7 Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 EPA Tier 4 Final.
Net power	264 kW	Published: 264 kW Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 ISO 9249 / SAE J1349 (354 HP). 239 kW at max cooling-fan speed.
Gross power	268 kW	Published: 268 kW Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 SAE J1995 (360 HP).
Displacement	15.24 L	Published: 15.24 L Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24
Rated speed	1,900 rpm	Published: 1,900 rpm Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24

Hydraulics

Spec	Value	Source
Pump / aux flow	180 L/min	Published: 180 L/min Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Implement (47.6 US gpm). Steering: 325 L/min.
System / relief pressure	27.5 MPa	Published: 27.5 MPa Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Implement (3,980 psi). Steering 38.2 MPa.

Performance

Spec	Value	Source
Blade capacity	9.4 m³	Published: 9.4 m³ Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Strengthened SIGMADOZER (12.3 yd³). Full-U: 11.9 m³.
Blade / moldboard width	4,060 mm	Published: 4,060 mm Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Dim. A, SIGMADOZER. Blade height 1,850 mm.
Max travel speed	11.6 km/h	Published: 11.6 km/h Komatsu D155AX-8 brochure, AESS869-0326-V5 (© 2026 Komatsu America Corp., Tier 4 Final). Retrieved 2026-10-24 Forward, 3rd (7.2 mph). Reverse 3rd: 14.0 km/h.

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