Komatsu D65EX-18
Sigmadozer productivity in the 23-tonne class
The Komatsu D65EX-18 is a 23-tonne dozer with Komatsu’s distinctive Sigmadozer blade and automatic transmission, also available as the D65EXi-18 with integrated machine control.
+Strengths
- Sigmadozer blade moves more material per pass
- Automatic transmission with lock-up for efficiency
- iMC 2.0 integrated machine control option
- Strong reputation for durability
−Watch-outs
- Premium pricing
- iMC version adds significant cost
Overview
The Komatsu D65EX-18 is the medium-class dozer in Komatsu's lineup and a direct rival to the Cat D6. The EX denotes the standard undercarriage; WX and PX (wide and LGP) versions are also available.
The Sigmadozer blade
Komatsu's Sigmadozer has a curved centre section that digs into the material and rolls it forward, reducing spillage and letting the dozer carry a larger load. Komatsu says it can increase productivity substantially compared with a conventional SU blade in many applications.
Drivetrain
An automatic transmission with a lock-up torque converter shifts gears for the operator and locks up for direct drive when pushing, improving fuel efficiency. Steering is hydrostatic for smooth turns under load.
Intelligent machine control
The D65EXi-18 adds Komatsu's iMC 2.0, which automatically controls blade load from rough dozing to finish grading and includes features like lift-layer control and tilt steering control.
Who it suits
Contractors focused on high-production dozing and road building who value fuel efficiency and Komatsu's strong dealer support.
Komatsu D65EX-18 specifications
| Operating weight | ≈23,000 kg (50,700 lb) |
|---|---|
| Net power | ≈162 kW (217 hp) |
| Blade capacity | ≈5.6 m³ (7.3 yd³), Sigmadozer |
| Engine | Komatsu SAA6D114E-6 |
| Transmission | Automatic powershift with lock-up torque converter |
Figures are typical for standard configurations as published by Komatsu. Values vary by market, emissions tier, attachments and options; confirm with your dealer before purchase, transport or lifting.
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