Terex RH340

Hydraulic Mining Excavator Front Shovel

by Adam Krawiec
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The Terex RH340 is a behemoth in the world of mining equipment. This hydraulic excavator is designed specifically for large-scale mining operations, offering superior digging power, productivity, and reliability. Let’s dive into the technical data and specifications of this impressive machine.

History and Evolution:

The history and evolution of the Terex RH340 excavator trace a journey of continuous innovation and adaptation, reflecting broader trends in the mining and construction industries towards efficiency, sustainability, and technological sophistication.

Key Milestones

  • Early Years (1950s – 1960s): Terex began as a subsidiary of General Motors focused on earthmoving equipment. Early designs were largely focused on scrapers and loaders, not excavators.
  • Acquisitions (1970s – 1980s): Terex expanded its reach with crucial acquisitions:
    • O&K (Orenstein & Koppel): A German manufacturer with a strong history in hydraulic excavators. This became a core part of Terex’s excavator technology.
    • Schaeff: Another German company known for compact excavators and wheeled excavators, adding to Terex’s range.
  • RH Series Introduction (1990s): Terex consolidated its excavator lines under the „RH” designation. The numbers reflected approximate operating weights (i.e., RH40 = roughly 40 metric tons).
  • Focus on Mining (2000s): As Terex grew, they increasingly focused on large-scale mining equipment. The RH series received larger models optimized for this sector.
  • RH340 Introduction (around 2010): The RH340 emerges as a flagship, fitting with Terex’s focus on powerful mining excavators.

RH340 Evolution

The RH340 itself has undergone refinements over the years, primarily focused on:

  • Emissions Compliance: Like all heavy equipment, meeting progressively stricter emissions regulations is key (Tier 4 standards, etc.).
  • Efficiency: Terex focused on more powerful engines with intelligent hydraulic systems for better fuel economy without sacrificing power.
  • Operator Comfort & Technology Upgrades: Modernized cabins, better visibility, and more intuitive controls become standard. Some RH340 models may feature telematics (machine monitoring systems) and even semi-autonomous features.
Its bucket is full and positioned above the dump truck
Terex RH340 - Loading Dump Truck Komatsu 730E.

Where It’s Used

  • Primarily Mining: The RH340 is designed as a production excavator for large-scale mining:
    • Open-pit Mines: Surface mining of ore, coal, and various bulk minerals.
    • Quarries: Excavating stone, aggregates, and other raw materials.
  • Large-Scale Construction (Less Common): While possible, the RH340’s size and cost make it overkill for most construction jobs. It might be used for:
    • Mass Excavation: Projects requiring HUGE volumes of earth or rock moved quickly.
    • Demolition: Bringing down large structures, but specialized demolition attachments would likely be needed.

Materials the Terex RH340 Excels With

  • Overburden Removal: The top layer of soil and rock covering valuable mineral deposits is a prime target for the RH340.
  • Blasted Rock: After blasting, the RH340 is ideal for loading loosened rock into haul trucks.
  • Ore and Coal: Directly excavating and loading the target mineral being mined.
  • Hardpacked Earth & Dense Materials: The RH340 has the power to tackle tough soils that would stall smaller excavators.

Why It’s Favored for Mining

  • Size and Capacity: Its large bucket and powerful breakout force allow it to move significant volumes of material per load cycle.
  • Reach and Digging Depth: Essential for working across wide mining pits and accessing deep deposits.
  • Durability: Mining environments are harsh, and the RH340 is built to withstand the wear and tear.


  • Configuration: Cummins QSK 60 or MTU 12V 4000 (depending on region)
  • Power: Up to 1,678 horsepower (1251 kW)
  • Emissions Compliance: Tier 2 / Stage II or Tier 4 Final / Stage IV (depending on region)


  • Pump Type: Variable displacement axial piston pumps
  • Maximum Flow: 2 x 343 gallons per minute (2 x 1300 liters per minute)
  • System Pressure: 7,252 psi (500 bar)

Operating Specifications

  • Operating Weight: 736,380 lbs – 860,222 lbs (334,000 kg – 390,000 kg) (depending on configuration)
  • Bucket Capacity: 23.5 – 30.9 cubic yards (18 – 23.6 cubic meters)
  • Maximum Digging Reach: 71 ft (21.6 m)
  • Maximum Digging Depth: 31 ft (9.44 m)


  • Overall Length: 45 ft (13.7 m)
  • Overall Width: 23 ft 11 in (7.3 m)
  • Overall Height: 25 ft 9 in (7.8 m)


  • Robust Undercarriage: Heavy-duty design for stability and durability in harsh mining environments.
  • Spacious and Ergonomic Cab: Excellent visibility, climate control, adjustable controls, and a comfortable operator’s seat
  • Advanced Monitoring System: Real-time machine data for operation and maintenance optimization.
  • TriPower Boom Geometry: Provides superior breakout force and crowd power.


  • Exceptional Power and Performance: Delivers high productivity in demanding mining operations.
  • Reliability: Designed for extended uptime and lower maintenance costs.
  • Versatility: Can handle various mining applications and materials.
  • Operator Comfort: Promotes productivity and reduces fatigue.

The Bottom Line

The Terex RH340 hydraulic mining excavator is a powerful workhorse built to handle the toughest mining challenges. Its combination of power, reliability, and advanced features make it a top choice for mining companies seeking maximum productivity and efficiency.

Important Note: Specifications may vary slightly based on model year and configuration. Always consult the manufacturer’s official documentation for the most accurate and up-to-date information.


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