Models R55-9A and R55W-9A have been upgraded with Tier 4-Final engines.
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 R180W-9A wheeled excavator has been upgraded with a Tier 4-Interim engine, a 155-horsepower Cummins QSB6.7.
The R35Z-9 excavator has an operating weight of 8,050 pounds and is powered by a 26.5-horsepower Yanmar 3TNV88 engine that is certified for Tier 4.