Bobcat Company released four new Tier 4 excavators — the E42, E45, E50, and E55 — that have 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.

The Tier 4 Bobcat non-DPF solution was achieved by designing an ultra-low particulate combustion (ULPC) 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% 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.

The new Tier 4 excavators feature a machine protection system that monitors, manages, and shuts down the engine if needed. This system monitors engine coolant and oil temperatures and will manage 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, according to the company.

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.

M-Series machines

The conventional tail swing E42 minimizes ground disturbance and excels at bulk excavation tasks, while the zero tail swing E45 can excavate close to surrounding objects with unobstructed rotation and good all-around visibility. The E50 is a minimal tail swing excavator with a compact frame for projects in tight areas without sacrificing digging or attachment performance. Class-leading lift capacity and slew torque performance top the capabilities on the conventional tail swing E55.

Three of the Tier 4 excavators — the E42, E45 and E55 — offer a clamp-ready extendable-arm configuration that provides additional length when fully extended, giving operators reach without having to upsize the machine.

Like all M-Series excavators, these models all feature an independent boom swing for offset operation as well as auto-shift travel, which boosts the machine’s productivity by shifting the machine out of high range and back automatically. An auto-idle feature, which can be enabled at the operator’s discretion, automatically causes the engine to return to idle if the excavator’s functions are not used for four seconds, saving fuel and reducing sound levels.

Forward-mount instrumentation improvements

A new forward-mount instrumentation system designed for enhanced functionality and improved ergonomics is being introduced with the E42, E45, E50, and E55. The previous instrumentation panel required the operator to turn to the side to engage the panel’s input switches; the new panel presents these buttons in front of the operator, where they are easier to identify and reach. From the operator’s viewpoint, the location of the panel also aligns with the existing cab components and work group structures to maintain visibility to the attachment.

The new instrumentation panel also provides for an enhanced version of the keyless start option, which can increase security for equipment assets.

QuickLook: Bobcat E42 Excavator

• TAIL SWING: Conventional

• ENGINE: 42.7 hp (31.8 kW) Tier 4 diesel

• OPERATING WEIGHT: 9246 lb. (4194 kg)*

• DIG DEPTH: 10.5 ft. (3,2 m)*

• REACH AT GROUND LEVEL: 17.3 ft. (5,2 m)*

• BUCKET DIGGING FORCE: 9183 lbf. (40850 N)*

QuickLook: Bobcat E45 Excavator

• TAIL SWING: Zero

• ENGINE: 42.7 hp (31.8 kW) Tier 4 diesel

• OPERATING WEIGHT: 10077 lb. (4571 kg)*

• DIG DEPTH: 10.8 ft. (3,3 m)*

• REACH AT GROUND LEVEL: 18.6 ft. (5,6 m)*

• BUCKET DIGGING FORCE: 7650 lbf. (34030 N)*

QuickLook: Bobcat E50 Excavator

• TAIL SWING: Minimal

• ENGINE: 49.8 hp (37.1 kW) Tier 4 diesel

• OPERATING WEIGHT: 10677 lb. (4843 kg)*

• DIG DEPTH: 11.6 ft. (3,5 m)*

• REACH AT GROUND LEVEL: 19.5 ft. (5,9 m)*

• BUCKET DIGGING FORCE: 8977 lbf. (39930 N)*

QuickLook: Bobcat E55 Excavator

• TAIL SWING: Conventional

• ENGINE: 49.8 hp (37.1 kW) Tier 4 diesel

• OPERATING WEIGHT: 12271 lb. (5566 kg)

• DIG DEPTH: 12.9 ft. (3,9 m)

• REACH AT GROUND LEVEL: 20 ft. (6 m)

• BUCKET DIGGING FORCE: 8977 lbf. (39932 N)

*Standard-arm configuration.