Bobcat's new Tier 4 excavators feature a machine protection system that monitors, manages and shuts down the engine if needed. The system monitors engine coolant and oil temperatures and manages engine systems to reduce the possibility of these fluids reaching a point where the machine has to be shut down. This minimizes potential damage to the engine, stops unnecessary engine wear and keeps operators working.
Courtesy of Bobcat Company

Bobcat Company has released four new Tier 4 excavators "?u the E42, E45, E50 and E55 "?u which include a non-DPF (diesel particulate filter) engine solution. These four medium-sized M-Series machines provide operators with all of the same performance benefits of the previous interim Tier 4 models. The machines also feature a new forward-mount instrumentation system that presents operators with many functions, aesthetics and visibility.

The Tier 4 non-DPF solution was achieved by designing an ultra-low particulate combustion engine. The ULPC is accomplished through a specially designed engine combustion chamber that significantly reduces the amounts of particulate matter created during combustion. Therefore, Tier 4 emissions compliance can be achieved without using a DPF.

In addition to eliminating the need for a DPF, the new engines used in E50 and E55 excavators will have a 12 percent increase in torque. This increase in torque is produced over a wide range of engine rpm, allowing operators of all skill levels to better utilize the machines' maximum performance.

Another new feature of the M-Series Tier 4 excavators is cold weather protection. Anytime the engine temperature is too low, the loader will temporarily limit the maximum engine speed (rpm) to prevent premature component wear or failure. Engine idle speed is also raised slightly to help the engine reach its operating temperature faster. As soon as the engine warms up to a predetermined temperature, the protection mechanism will deactivate. For more information go to www.bobcat.com.