Case Construction Equipment C Series excavator line now features the CX250C, CX300C, and CX350C excavators, which replace B Series models. They feature Tier 4 Interim-certified cooled exhaust gas recirculation (CEGR) technology for a cleaner burn and more power: 177, 207, and 266 net hp (132, 154, and 198 kW), respectively.
Some of the upgrades include what Case calls an Intelligent Hydraulic System, which is said to reduce total fuel consumption and improve performance. Boom Economy Control lowers engine rpms during the boom down and swing operation, while the Auto Economy Control lowers rpms when the joysticks are inactive.
Swing Relief Control technology manages the hydraulic power allotted at the start of the swing operation, and Spool Stroke Control creates an automatic pressure adjustment during digging operations.
Case says that a CX250C excavator used in trenching applications can save as much as 3 gal of fuel per hour compared to competitive models. According to Tim O’Brien, Marketing Manager, Case CE, if an operator puts 1000 hours on a machine in a year, $9000 can go straight to the bottom line.
“Fuel efficiency gains are especially significant,” said O’Brien. “While typical CEGR systems lose fuel efficiency, we’ve actually increased fuel efficiency on our C Series excavators by up to 10% over our previous B Series models.”
Along with up to 5% faster cycle times—the new C Series can load up to 10 more trucks during every work shift—the excavators offer operators smoother and easier control and maneuverability, claims Case.
The three C Series models feature up to 6% more lift capacity for bigger jobs. The CX250C has an operating weight of 55,400 lb (25 100 kg), and the CX300C and CX350C weigh in at 65,900 and 80,000 lb (29,900 and 36,300 kg), respectively.
“C Series operators also benefit from a more spacious, comfortable, and quiet cab,” according to O’Brien. Noise-reduction improvements, including vibration refinement on the cab’s reinforced tubular structures, contribute to the "extra-quiet cab environment" with noise levels as low as 69.9 dBa. “It’s like being in a car even when the excavator is running at full throttle,” he said.
The cab on the new excavators provides 7% more overall space and 25% more airflow. Air-conditioning performance also has increased by 8%.
A rearview camera feeds video to a 7-in LED monitor in the cab to expand the operator’s view around the machine. The operator can easily switch between rear and optional side camera views. Plus, they have simultaneous visibility to key operating data, including a new function that provides fuel consumption per hour. “Operators can use this information to refine fuel efficiency for their particular operation,” said O'Brien.
The C Series excavators also include a standard air-suspension seat and an in-cab auxiliary hydraulic setting system with a new option for 10 memory-recall settings to make tool changes quick and easy.
Extended service intervals for the excavators include 500-h for engine oil, 5000-h for hydraulic oil, and 1000-h for greasing intervals with Easy Maintenance System bushings. The cab includes new access points to easily reach the air filter and fuse box.
The redesigned engine, cooling, and exhaust systems were efficiently packaged while maintaining excellent serviceability and operator visibility, according to O’Brien. “The machines feature wide-open panels for easy access to service points and ground-level access to grouped lubrication points.”
A range of attachments are offered for the C Series excavators, including buckets and multifit couplers. The new line of Case excavator buckets, including general-purpose, heavy-duty, ditching, rock, and Couplex application buckets, are all available with the Case SmartFit durable bucket tooth system with tips that can be switched without hammering pins.