Komatsu has unveiled the new D71-24, its largest hydrostatic transmission (HST) dozer that features a distinctive slant nose design for exceptional visibility.
The new dozer is available as standard, low ground pressure or with intelligent Machine Control 2.0.
According to Komatsu, the D71-24 is the most powerful hydrostatic transmission (HST) dozer in its size class.
Equipped with a four-cycle, water-cooled, direct injection 237 hp engine, Komatsu’s largest HST dozer features an operating weight of 22,600 kg to 23,100 kg.
The dozer features two operating modes. In P mode, the engine delivers its full power to help operators perform heavy-load work. It automatically increases engine speed for maximum power when load increases. In H mode, engine high-idle speed increases, which is suitable for power-intensive work.
The dozer’s distinctive slant nose design offers ample visibility of the cutting edges, alongside balance and maneuverability.
It is equally adept at precise, high-speed grading and rough dozing, and is designed to provide improved wearability and functionality with a high-capacity, wear-resistant dozer blade. As well, the dozer’s Parallel Link Undercarriage System (PLUS) features rotating bushings to help minimize maintenance downtime and cost of ownership.
The Komatsu PLUS undercarriage lowers maintenance costs by up to 40 per cent compared to a conventional undercarriage. Strengthened rollers and links also increase wear life up to two times. Designed to wear evenly, the machine delivers nearly 100 per cent usage of undercarriage components,
The slant-nosed HST dozer is also available with Komatsu’s intelligent Machine Control (iMC) 2.0 capabilities.
Via iMC 2.0, Lift Layer Control optimizes earthwork productivity with the press of a button. It maintains compaction quality by automatically controlling lifts to the desired height. As well, excess fill is eliminated as automatic blade control follows the finish surface once lifts have reached finished grade.
Tilt Steering Control is also part of iMC 2.0, which automatically tilts the blade to maintain straight travel during rough dozing. This is able to reduce operator steering input by up to 80 per cent.
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With Quick Surface Creation, operators can create a temporary design surface with the press of a button. Combined with other iMC 2.0 functions, crews can begin stripping or spreading using automated input while waiting for the finish grade model.
Furthermore, with Proactive Dozing Control, even less experienced operators can automatically cut/strip from existing terrain. The dozer measures the terrain it tracks over and uses that data to plan the next pass, improving productivity by up to 60 per cent compared to previous generation machines.
To help maximize operator comfort and connectivity, the D71-24 is equipped with a standard Bluetooth AM/FM radio and additional AUX and USB connection capability. The dozer also includes an air suspension seat with operator presence sensing system, colour LCD monitor, high mount foot rests and a rear-view monitor system.
For maintenance, the D71-24 delivers easy access to the radiator, oil cooler and charge air cooler with swing-up assisted lift system. As well, the hydraulic fan reverses for clearing objects that restrict air flow. The rear-mounted single-plane cooling system also swings upward for fast service.