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.
Models R140W and R210W wheeled excavators have been upgraded to 9A Series with Cummins QSB6.7 engines that are certified for Tier 4-Interim.
Hyundai R180W-9A wheeled excavator has been upgraded with a Tier 4-Interim engine, a 155-horsepower Cummins QSB6.7.