Equipment Type

Hyundai R55-9A Excavator

Models R55-9A and R55W-9A have been upgraded with Tier 4-Final engines.

January 20, 2014

Models R55-9A and R55W-9A have been upgraded with Tier 4-Final engines. Tracked R55-9A has steel tracks with the option of rubber tracks, and the R55W-9A is wheeled. Redesigned hydraulic system includes an arm flow summation system, boom holding system, and a swing parking brake. Pump flow control has been improved, and improved spool values provide more precise flow to each function, Hyundai says. Structural improvements include stronger but slimmer tubing in the cabin for improved visibility, and low-stress, high-strength steel integrally welded for a stronger upper and lower frame, the company says. Counterweight rear guards protect the engine hood, and a boom cylinder cover protects the cylinder.

Hyundai R55-9A Excavator Specifications

R55-9A
  • Operating weight: 12,460 pounds
  • Bucket breakout force: 8,490 lb.-ft.
  • Max dig depth: 12 feet 6 inches
  • Engine: 65.1 horsepower
  • Bucket size: 0.09 – 0.24 cubic yards
R55W-9A
  • Operating weight: 12,2400 pounds
  • Bucket breakout force: 8,490 lb.-ft.
  • Max dig depth: 11 feet 6 inches
  • Engine: 65.1 horsepower
  • Bucket size: 0.09 – 0.24 cubic yards

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Two production-class crawler excavators, the R480LC-9A and R520LC-9A, use the Cummins Tier 4-Interim QSX11.9 engine

The R35Z-9 excavator has a certified Tier 4-Final Yanmar 3TNV88 engine that delivers 26.5 horsepower.

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