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Hitachi 125 WD-5 Excavator Overview
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Machine Description
The Hitachi 125 WD-5 is a mid-sized hydraulic excavator designed for construction, utility, and earthmoving projects requiring a balance of power, reach, and maneuverability. Known for reliability and efficient performance, this model caters to operators seeking a versatile machine in the 12-13 ton weight class.
Engine and Power
  • Equipped with a Nissan A-BD30 engine delivering around 54 horsepower (40.3 kilowatts) at 2200 RPM.
  • Engine displacement is approximately 3 liters (180.2 cubic inches).
  • Maximum torque reaches about 133.5 lb-ft (181 Nm) at 1500 RPM.
  • Naturally aspirated design ensures robust and consistent power delivery for hydraulic functions.
Dimensions
  • Shipping length: Approximately 19.9 feet (6080 mm).
  • Shipping height: Approximately 8.4 feet (2570 mm).
  • Width to outside of tracks: Around 7.2 feet (2200 mm).
  • Ground clearance is about 1.2 feet (360 mm), aiding mobility on uneven terrain.
  • Tail swing radius measured near 5.7 feet (1750 mm), allowing compact operation in tight zones.
  • Track gauge is about 5.7 feet (1750 mm).
Performance Metrics
  • Operating weight close to 13,889 pounds (6,300 kg), offering a solid balance between stability and transportability.
  • Fuel capacity holds approximately 9.4 gallons (35.7 liters).
  • Hydraulic system operates at relief valve pressure of around 4550 psi to ensure effective power for boom, stick, and bucket movements.
  • Hydraulic pump flow capacity near 41.8 gallons per minute supports smooth and precise machine operation.
  • Swing speed maxes out around 14.5 rpm, allowing efficient maneuvering.
Bucket and Digging
  • Reference bucket capacity is near 0.37 cubic yards (0.28 cubic meters), with options from 0.14 to 0.44 cubic yards.
  • Maximum digging depth ranges between 13.6 and 15.3 feet depending on boom and stick configuration.
  • Maximum digging reach along ground extends up to about 21.9 feet.
  • Maximum cutting height reaches near 24.8 feet.
  • Maximum loading height is approximately 17.9 feet.
Design and Features
  • The WD-5 model is valued for its hydraulic efficiency, smooth control responses, and compact design tailored for medium-sized site tasks.
  • Adjustable boom and stick combinations cater to job-specific digging depth and reach needs.
  • The excavator's size and reduced tail swing radius make it suitable for work in confined areas and urban environments.
Glossary
  • Tail Swing Radius: The clearance needed behind the machine when the upper structure rotates.
  • Hydraulic Pump Flow: The volume of oil flow the hydraulic system can deliver per minute.
  • Relief Valve Pressure: Maximum system pressure before a hydraulic relief valve opens to prevent damage.
  • Operating Weight: The total weight of the machine ready for operation, including fluids.
  • Digging Reach: Maximum horizontal distance the bucket can reach from the center of the machine.
Conclusion
The Hitachi 125 WD-5 excavator represents a reliable and flexible choice for contractors and operators needing a mid-tier hydraulic excavator with a balance of power, compactness, and hydraulic capability. Engineered with proven Nissan powerplants and a robust hydraulic system, it meets demanding applications while maintaining efficiency and maneuverability in compact sites.
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