New Cat® E2 Series Mini Hydraulic Excavators Get New High Definition Hydraulic System, New Cab and New Source Facility

For Release in Europe, Australia, New  Zealand: October 2014
Release Number: 527PR14

Three compact radius Cat® E2 Series Mini Hydraulic Excavators— The 305E2, 305.5E2 and 308E2 will be produced at Caterpillar’s new 78,968 square metre (850,000 square foot) facility in Athens, Georgia, USA and will also use the new High Definition Hydraulic system.

The E2 models are designed to carry on the solid performance of their E Series predecessor, while adding even greater value for the customer. For example, the new High Definition Hydraulic (HDH) System in the E2 machines provides a load sensing and flow sharing capability leading to operational precision, efficient performance and greater controllability. The simple valve architecture reduces heat, which leads to a reduction in hydraulic instability and improved overall efficiency.

The 305.5E2 and 305E2 include a redesigned operator station. This update includes a wider opening, a high quality suspension seat, easy to adjust arm rests and an overall improved ergonomic layout for operator comfort and productivity. Additionally, a new interlocking front window system, updated operator interface controls and 100% pilot controls provide a best-in-class operator station and customer value. 

The E2 series models are equipped with the digital control panel specially designed for Cat Mini Excavators—COMPASS—Complete Operation, Maintenance, Performance, and Security System. Built into the COMPASS monitor are an anti-theft system, which requires a five-digit alphanumeric password to start the machine, an automatic engine-idle selection, which drops engine rpm to idle after 4 seconds of inactivity and an adjustable auxiliary-flow control for work tools. Both main-line and optional secondary auxiliary-hydraulic systems can be adjusted on a scale of 1-15 through the monitor for added control.

The E2 Series models also continue to include the standard features and benefits customers expect from a high-quality mini hydraulic excavator. For example, automatic two-speed, 100% pilot controls, superior bucket rotation, blade float and safety are built into every Cat mini excavator.  The automatic two-speed feature allows the operator to put the machine in “high speed” (rabbit) and not worry about manually kicking down to low gear while turning, digging, or roading in tough conditions. One hundred percent pilot controls offer consistent and long-lasting controllability with reduced owning and operating costs often associated with mechanical linkage. The unique design of the Cat MHE linkage, bucket, and cylinders on the 305E2 and 305.5 E2 allows for an industry leading 200 degrees of bucket rotation. The unique bucket shape also maximizes the volume of material per scoop without sacrificing digging performance and the boom and stick cylinders have built-in dampening to cushion the impact of the rod & piston against the stops when it reaches full extension or retraction.

Additionally, the blade float function allows the operator to drag the blade backwards (away from the cutting edge side) and the blade will “float” along the contour of the ground with only the weight of the blade bearing down to smooth the site after grading and backfilling holes leading to ease of operation and productivity.

Finally, all three models are ROPS, TOPS and Top Guard Level 1 certified; include the Cat Interlock (hydraulic lockout) System; a certified accumulator which allows for auxiliary pressure to be released, making connecting and disconnecting work tools safer and easier; and a travel alarm. All of these safety features are standard on the E2 model lineup, with the travel alarm optional in Europe.

For more information about the E2 series mini hydraulic excavators, customers should contact their local Cat dealer.

Specification 305E2 CR 305.5E2 CR 308E2
Engine Model Cat C2.4 Cat C2.4 Cat C3.3B
Rated Net Power, kW (hp) 30.0



Operating Weight, Canopy,  kg (lb) 5 020
(11 069)
5 259
(11 596)
Operating Weight, Cab, kg (lb) 5 185
 (11 433)
5 423
(11 958)
8 400
(18 519)
Digging Force – Bucket, kN (lbf) 44.7
(10 049)
 (11 443)
(13 534)
Dig Depth, mm (in) 3 280
3 470
4 690
Maximum Reach, mm (in) 5 600
5 790
6 990

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Note to Editors: Caterpillar rolls out products and services in each of its territories at different time intervals. Although every effort is made to ensure that product information is released only after Caterpillar has received confirmation from our dealer network, our plants, and our marketing subsidiaries that products and services are available in the relevant region, editors are kindly requested to verify with their local dealer for product availability and specifications.

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