24,605 kg247 hp6 m³ blade69 kPaŚrednia rynkowa — · 0 w ofercie · 0 poniżej rynku
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The Liebherr PR744 is a large hydrostatic crawler bulldozer in the 28–33-tonne class, in production since 2008. Its hydrostatic direct drive delivers infinitely variable speed control and regenerative braking. The PR744 is powered by a Liebherr D946 engine producing 295 hp and pushes a 6.7 m³ six-way blade. It competes with the Komatsu D85EX and Caterpillar D7R, though the hydrostatic drivetrain suits precision large-area grading and compaction rather than heavy push work.
The PR744 is used on major European quarry operations, large-scale land reclamation projects, and road and rail earthmoving contracts. In Germany, it is used for reclamation of former open-cast mining areas (Braunkohle restoration), where precise grading to designed contours is required. Dutch Rijkswaterstaat contractors have used it for sand nourishment and coastal defence earthworks. The hydrostatic drive suits steep slopes where conventional power-shift machines can experience transmission heating.
Request a complete hydraulic oil analysis history covering pump wear metals, particularly iron and copper particles. The large hydraulic pump and motor assemblies are expensive to rebuild, but failures are typically preceded by warning signs in oil analysis. Check the main frame for fatigue cracks in the blade mounting area on machines used for quarry ripping. Inspect the ripper assembly and shanks for wear and impact damage. Confirm service was performed at Liebherr-authorised centres.
Supply of good used PR744 machines in the European market is limited. Liebherr produces them in smaller volumes than comparable Cat or Komatsu models, and operators tend to retain well-running machines. This supply constraint supports firm residual values. Demand is strongest in Germany and Austria, where large earthmoving contractors and quarry operators value the hydrostatic drive's precision and longevity.
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