Komatsu D71 Medium Dozer
Information
Additional information
| Make | |
|---|---|
| Model | D71, D71PXi, D71PXi-24 |
| Weight | 23 t |
Equipment Overview
The Komatsu D71 is a medium dozer built for high-production dozing and grading, part of Komatsu’s -24 series crawler dozer range for the Australian and New Zealand market and Komatsu’s largest hydrostatic-transmission dozer. It has 177 kW (237 hp) of net power, an operating weight of 22,600 kg, and a 4.42 m³ power-angle-tilt (PAT) blade in standard configuration, suited to civil construction, quarrying, and general earthmoving where fast travel and precise blade control matter.
Power comes from the Komatsu SAA6D114E-6 engine, a 6-cylinder, 8.85-litre unit meeting U.S. EPA Tier 4 Final emission standards, using a Selective Catalytic Reduction and diesel particulate filter aftertreatment system. The D71 runs a dual-path hydrostatic transmission (HST) with electric control, giving stepless speed changes up to 11 km/h, paired with hydrostatic steering that eliminates steering clutches and brakes for smooth, powerful turns. A fixed-angle, three-shank multi-shank ripper is fitted as standard for scarifying compacted ground.
Technical Specifications
| Specification | Value |
|---|---|
| Engine | Komatsu SAA6D114E-6, 8.85 L, 6-cylinder, turbocharged, air-to-air aftercooled |
| Power Output | 177 kW / 237 hp (net, ISO 9249/SAE J1349 @ 2,100 rpm) |
| Emission Standard | U.S. EPA Tier 4 Final Engine |
| Transmission | Dual-path hydrostatic transmission (HST), electric control, stepless speed changes to 11 km/h |
| Drive Type | Hydrostatic steering (HSS) with counter-rotation; no steering clutches or brakes |
| Operating Weight | 22,600 kg (D71EX-24, PAT dozer) |
| Blade Capacity | 4.42 m³ (PAT, standard) |
| Blade Width | 3,870 mm (standard) |
| Ground Pressure | 55.5 kPa (with dozer and ROPS cab) |
| ROPS / FOPS | ISO 3471 / ISO 3449 |
Dimensions
| Dimension | Value |
|---|---|
| Overall Length (with dozer) | 5,810 mm |
| Track Gauge | 2,230 mm |
| Height | 3,170 mm |
| Ground Clearance | 410 mm |
| Minimum Turning Radius | 3.1 m (pivot turn, measured by track marks) |
Typical Applications
- Civil construction earthmoving and site development
- Quarry and aggregate face and stockpile work
- Fast-cycle bulk dozing and finish grading
- Fine grading with intelligent Machine Control (iMC) variants
- Land clearing and general earthworks
