Case's 621F and 721F (pictured) wheel loaders now meet Tier 4 Final emissions standards. Like the Tier 4 Interim models, each model is equipped with a selective catalytic reduction (SCR) solution that treats emissions separately with Diesel Exhaust Fluid (DEF) and does not require the engine to re-circulate exhaust gas. This is designed to improve fuel efficiency (up to 20 percent greater than previous solutions, according to Case), lower exhaust temperatures and fuel consumption, and optimize throttle response and maintenance without sacrificing power. It also requires no diesel particulate filter (DPF) regeneration or maintenance. Additional fuel savings can be achieved with a standard engine shutdown feature found on each model that allows the operator to limit engine idle time.
Each new Tier 4 Final wheel loader features a 6.7-liter engine. The 621F and 721F wheel loaders produce 162 and 179 net rated horsepower (121 and 133 kW), respectively. Both machines are also available with XT (tool carrier) or XR (extended reach) linkage and specialty configurations.
The 621F and 721F feature four programmable power modes that allow users to match the machine output to available engine power. The loaders include heavy-duty axles with auto-locking front and open rear differentials for optimal traction in a range of conditions. The axle is designed to help reduce tire wear, especially on hard surfaces, according to the OEM. The 621F and 721F offer an optional Efficiency Package that includes a five-speed transmission with lock-up torque converter for faster road travel speed, acceleration and shorter cycle times, as well as axles with auto locking differential and advanced system programming. The optional five-speed transmission includes the Case Powerinch feature that lets operators approach targets quickly and precisely regardless of engine speed. Case says this feature ensures there is no rollback even on steep slopes, making it easier and quicker to dump into a truck.
Both models are also available as waste handlers, featuring 16 guarding points, a high-efficiency mid-mounted cooling cube, a slanted hood and Sy-Klone ejective air pre-cleaner, and heavy-duty axles and solid tires.
The 621F and 721F wheel loaders feature cabs with full climate control, as well as a joystick steering option designed to reduce operator fatigue. Floor-to-ceiling windows optimize visibility to attachments. All service points are grouped and located throughout the machine for easy access. Additional operator options, such as a rearview camera and a heated air-ride seat are available.
Ground-level service points and eye-level fluid gauges are meant to maximize serviceability. The mid-mounted cooling module limits debris buildup and provides easy access for routine cleaning. And a standard, electronically controlled power-tilt hood makes facilitates access to the engine compartment.
