About the Komatsu D85EX
The Komatsu D85EX is a large crawler bulldozer in the 25–30-tonne class, in production since 2000. The EX designation specifies the standard-track configuration suited to firm ground and quarry work. Its Komatsu SAA6D125E-5 engine produces 264 hp and the machine pushes a 6.0 m³ semi-U blade with a total drawbar pull exceeding 35,000 kg. The current D85EX-18 generation features Tier 4 Final compliance, KOMTRAX remote monitoring, and an auto-blade-assist function that can actively adjust pitch and angle during a push cycle.
Typical applications
The D85EX is favoured in European quarries for primary ripping and dozing of limestone and sandstone overburden. Its ripping power — up to 4-shank ripper configurations are available — makes it effective for breaking compacted rock before loading. It is also a common choice for large-scale earthmoving on motorway and rail corridor projects in Germany, where contractors need a single machine that can rip, push, and spread efficiently. Its size also suits large-area land reclamation and coastal defence embankment work.
What to look for when buying used
Inspect the ripper frame and tine shanks carefully — cracks near the weld zones are common on machines used in hard rock environments. The hydraulic main pump and control valve assembly are expensive to replace (€15,000+), so ask for hydraulic pressure test results. Track bushing wear should be checked at the turn point: if the bushing has rotated from the wear track, it is due for replacement. The D85EX is a heavy machine, so check the final drive oil for metal particles at each purchase inspection.
Market context
The D85EX competes with the Caterpillar D7R (now discontinued) and the Liebherr PR744 in the 25–32-tonne range. Demand in Germany's quarrying and construction sector is consistent, and the model's long production run means a healthy supply of used machines at various price points. Prices have been under moderate pressure in 2025–2026 as high-hour machines from major quarry operators cycle out of service, creating good buying opportunities for maintenance-confident purchasers.
Common problems at high hours
The D85EX's main hydraulic pump develops internal bypassing above 10,000 hours, manifesting as slower blade response and reduced ripping force — pump rebuild costs €15,000–€20,000. Ripper frame weld cracking near the mount point is extremely common on quarry machines; look for field repairs indicated by grinder marks and re-welded joints. The equaliser bar bearings on the undercarriage fail at 6,000–8,000 hours in hard-rock environments, causing uneven track tension and accelerated sprocket wear. Dutch contractor workshop supervisors note that the torque converter lock-up clutch wears prematurely on machines used for extended downhill dozing, with rebuild costs of €8,000–€11,000 when detected late.
Resale value trajectory
The D85EX has experienced moderate downward pressure on residual values in 2025–2026 as German quarry operators dispose of high-hour fleet machines. Machines from the 2016–2020 production window have retained approximately 45–52% of their original list price after five years of service — slightly below the segment average due to the current oversupply of used units. However, well-maintained low-hour examples from contractor dispersal sales still command firm prices. Tier 4 Final compliance is increasingly important for resale in the DACH region, as environmental regulations tighten on construction and quarry sites. Machines with documented KOMTRAX histories and Komatsu dealer service records trade at a 10–15% premium.
Alternatives in this class
The Liebherr PR744 is the strongest alternative for buyers who value precision grading — its hydrostatic drive provides superior control on slopes and in compaction work, though acquisition costs run 10–20% higher. The Caterpillar D7R, while discontinued since 2012, remains available on the used market and offers a lower entry price for buyers comfortable with an aging platform. For buyers needing maximum ripping power in hard rock, the Caterpillar D8T offers significantly more drawbar pull but at a substantial step up in acquisition, transport, and undercarriage costs. The Komatsu D65PX is worth considering if the D85EX's 28-tonne weight exceeds the project requirement.