Excavators are the workhorses of most heavy lifting, demolition, and digging operations, hence the many variations available. Tracked models are more common, but for smaller spaces and travel on finished surfaces, a wheeled model offers speed and delicacy not available with either tracked or truck-mounted excavators. John Deere has expanded its excavator line with two new models, both wheeled, to be able to better meet the needs of its customers.
The 190D W and the 220D W are both named for their weight, 19 and 22 t (21 and 24 ton), respectively. The primary differences are weight, boom length, and breakout force. They replace the 180C W and the 210C W wheeled models.
Both new models are powered by the same Isuzu 5.2-L four-cylinder Tier 3 compliant diesel, producing 159 hp (119 kW), which is both turbocharged and intercooled. This power is transmitted to all four wheels via a Funk Powershift two-speed transmission that is protected by only being allowed to downshift between certain parameters. Both models can reach more than 20 mph (32 km/h), allowing for greater range of motion and situational accommodation.
While not quite as capable off-road as tracked models, these models are envisioned more for use on highway and in-town projects. “The 190D W and 220D W are highly productive in digging ditches, repairing streets and sewers, or moving Jersey barriers,” said Mark Wall, Excavator Product Marketing Manager, Deere.
Both models come with the Powerwise III engine/hydraulic-management system that maximizes power output and delivers smooth, predictable multifunction operation while saving fuel. The Powerwise system is designed to activate the hydraulics smoothly and without delay.
Operators are cushioned by fully adjustable seating and console areas, and the new models offer increased legroom and lower noise levels.
Hydraulic flow can be observed via an LCD monitor, allowing for real-time changes in hydraulic flow, maintenance tracking, onboard diagnostics, and service monitoring. A variety of attachment needs can be adjusted from inside the cab, and joystick controllers come pre-fitted for auxiliary controls, making it easy and inexpensive to add auxiliary hydraulics. Both vehicles come standard with low-flow, medium-pressure assist hydraulics for operating thumbs, rotators, or tilt buckets.
The cab comes with many standard details that make using the vehicle less of a chore, including an AM/FM radio, tilt steering wheel, climate-control system, and a 12-V port for cell phone charging. There’s also space for a lunch box as well as cup holders and a hot/cold box. A high-efficiency cooling fan, noise-suppression muffler, and isochronous high-idle speed work together for improved noise reduction in the cab. Also helping are silicone-filled mounts that isolate operators from noise and vibration.
The frame is shared by other D-series excavators and has reinforced side frames to resist impacts. Welded bulkheads within the boom resist torsional stress, and heavy-duty covers on the outriggers help protect the hydraulic cylinders from damage.
Large access panels allow for easy daily access, with oil and fuel filters positioned to be changed without difficulty.
Tungsten-carbide coating provides a wear-resistant surface to protect the bucket-to-arm joint. Major joints also have extended service intervals, with powdered-metal, oil-impregnated bushings allowing grease intervals to 500 h for the arm-and-boom joint and 100 h for the bucket joint.