Case Construction Equipment’s new CX145C SR and CX235C SR minimum-swing radius (MSR) excavators both use cooled exhaust gas recirculation (CEGR) technology to meet environmental standards and save on fuel consumption.
Compared with previous B Series models, the CX145C SR and the CX235C SR deliver fuel savings of up to 9.2% and 17.5%, respectively. The new excavators’ Tier 4 diesel engines achieve 100 net hp (75 kW) for the CX145C and 160 net hp (119.3 kW) for the CX235C using Tier 4 Interim CEGR technology for a cleaner burn.
“Our latest excavators are ideal for projects where the work envelope is limited and the combination of maneuverability and power is essential to getting the job done,” said Rob Marringa, Brand Marketing Manager for Case CE. “We engineered these models to meet the current emissions mandate while boosting productivity [and] delivering lower owning and operating costs.”
The CX145C SR and CX235C SR excavators are engineered with a compact counterweight and boom placement that minimizes the machines’ work envelope. The excavators are particularly suited for restricted conditions, such as those encountered with road and bridge work, residential projects, and urban construction. They are also just as capable for wide-open job sites.
One of the enhancements incorporated into the new excavators includes the Case Intelligent Hydraulic System, which works with CEGR for increased fuel savings and helps manage the engine and hydraulics to boost performance, including the ability to load trucks faster.
The CX145C SR cycles 4% faster and delivers a 9% increase in lift capacity vs. the previous model. The CX235C SR excavator cycles 7% faster than its predecessor and offers a 15% increase in lift capacity. Several energy-saving features work within the hydraulic system to manage engine rpms for lower operating costs.
Automatic Power Boost delivers added power for extremely heavy breakout and lifting requirements. Three power modes—SP (speed priority), H (heavy duty), and A (automatic)—allow operators to choose the best mix of power and fuel efficiency. Throttle settings also adjust hydraulics for further tailoring to specific tasks.
Case CE says each excavator provides 6% more space and 28% more airflow inside the cab than the previous models. Air-conditioning performance within the cab has increased by 20%.
Other cab improvements include better visibility. The low profile common to all C Series excavators results in 32% more visibility, in addition to a new roof skylight. A high-definition camera feeds a 7-in LED, non-glare monitor in the cab. Operators can easily switch the large, clear monitor between rear and optional side camera views. It also provides simultaneous visibility to key operating data. Tool changes are quick and easy with an in-cab auxiliary hydraulic setting system that includes an option for 10 memory-recall settings.
Reinforced tubular structures in the cab help create an extra-quiet environment with automotive-like noise levels as low as 69.9 dBA. A deluxe air-ride seat includes adjustable armrests and five primary adjustments to customize the comfort. Level 1 ROPS/FOPS (rollover-/falling-object protection systems) cab structures were specifically engineered to enhance operator safety.
According to Case CE, the CX145C SR and CX235C SR excavators achieve a 14.8% and 12% improvement score, respectively, over previous models on the SAE International maintainability index. For example, the new models provide extended service intervals. Oil change intervals are 500 h via a high-performance filtration circuit. Hydraulic oil change intervals are 5000 h, while Easy Maintenance System bushings result in greasing intervals of 1000 h.
In terms of serviceability, the air filter and fuse box are readily accessible inside the cab. Ground-level access points, wide service panels, and grouped lubrication points speed routine maintenance.
A full range of attachments, along with five auxiliary hydraulic options for powering them, lets users tailor the machine to the job for added versatility and optimum productivity.
As is common with other C Series excavators, the CX145C SR and CX235C SR feature a number of Case Smart Digging Systems components. The Case Multi-Fit Coupler provides complete hydraulic latching, allowing operators to quickly attach and detach buckets and other components without leaving the cab.
Case coupler buckets feature integrated bucket pins to prevent any loss of breakout force that might otherwise occur when using a coupler device. Pin-on buckets are designed for heavy-duty, high-capacity applications, such as digging in dense soil, clay, loose rock, and gravel.
The SmartFit bucket tooth system provides stronger, more durable teeth and adapters, as well as hammerless, reusable locking pins, says Case. The SmartFit lineup includes general purpose, rock chisel, heavy penetrator, tiger, twin tiger, and flare teeth.
The CX145C SR has an operating weight of 33,290 lb (15,100 kg), a bucket digging force of 20,200 to 21,400 lb (90.0 to 95.0 kN), arm digging force of 12,600 to 16,600 lb (56 to 74 kN), and a maximum dig depth of 18.08 to 19.13 ft (5.51 to 5.83 m). Standard bucket sizes range from 0.43 to 1.02 yd³ (0.33 to 0.60 m³).
The CX235C SR offers an operating weight of 56,029 lb (25,400 kg), a bucket digging force of 31,920 to 34,170 lb (142 to 152 kN), arm digging force of 23,160 to 29,670 lb (103 to 132 kN), and a maximum dig depth of 20.08 to 21.23 ft (6.12 to 6.49 m). Standard bucket sizes range from 0.55 to 1.53 yd³ (0.42 to 1.17 m³).