Caterpillar expands Next Generation Mini Excavator range with four new models (7-10 tons) offering configuration choices and premium features

For Release in Australia, New Zealand and Pacific Islands: November 2018 
Release Number: 597PR18

The Caterpillar range of Next Generation mini hydraulic excavators has been expanded with the addition of four new models in the 7-to-10-ton category. These new models provide a range of size and configurations that allows owners to choose the machine that works best for their application. Cat® Next Generation mini excavators feature heavy duty main structures, fuel efficient engines, load sensing hydraulics, spacious cabs, and the exclusive Caterpillar Stick-Steer system. Caterpillar’s overall design goal in developing its Next Generation models is to ensure optimum value for owners in terms of performance, operator experience, serviceability, and affordability.
The new-model lineup includes:

307.5 – a new Cat model, the 307.5 is a standard tail swing model with a fixed boom that provides the best possible digging and lifting performance.

308 CR - a compact radius model with a swing boom that provides the versatility of working in tight spaces where site-safety requires minimal tail overhang.

309 CR - a new Cat model in the mini range featuring a compact radius, swing boom, and high flow auxiliary hydraulics that provides the ability to multi-function while maintaining maximum hydraulic power to attachments.

310 - also new to the range, featuring a fixed boom, standard tail swing, and twin blade cylinders for heavy-duty blade applications.

The new models above have maximum operating weights ranging from 8,233kg to 10,182kg and standard dig depths of 4,107 mm to 5,174 mm. Three models, the 307.5, 308 CR, and 309 CR are available with long-stick options that increases dig depth by approximately 560 mm.

Powering the 307.5 is the Cat C2.4 turbo diesel engine rated at 55.9 net horsepower (41.7 kW); the three larger models use the Cat C3.3 diesel engine rated at 70.3 net horsepower (52.4 kW).

Operator environment

The design of Cat Next Generation mini excavators emphasizes operator comfort, convenience, and safety. The four new models are fitted with sealed and pressurized cabs to ensure a quiet, clean and dust-free operator environment. Suspension seats and retractable 3-inch-wide belt, are standard, and the operating consoles feature adjustable wrist rests. The large front window slides upward and stores conveniently overhead, and expansive glass areas on the sides and rear of the cab, plus a skylight, provide all-around visibility. A rear camera is integrated into the monitor and In-cab sound levels are a quiet 72 dB(A).

The cab's protective structures are built to ROPS (ISO 12117-2:2008); TOPS (ISO 12117:1997); and top guard (ISO 10262:1998 Level II) standards.


Intuitive controls include the Next Generation LCD monitor that provides easy-to-read machine information and features an automotive style jog-dial for easy navigation, including setting personal operating preferences. For added convenience, a standard control-pattern changer allows operators to quickly adapt the machine to favored joystick movement. Each monitor includes passcode enabled starting as well as integrated radio with Bluetooth capability to connect with an operator’s smart-phone.

Cat Exclusive Stick Steer System

An exclusive feature for all new Next Generation models is the Cat Stick Steer system, which allows the operator to switch (with the touch of a button) from conventional lever/foot-pedal steering controls to low-effort joystick control. Automatic two-speed travel is standard, as is a cruise control system that further enhances machine travel and control.

Premium performance

Cat Next Generation mini excavators use an efficient, fuel-saving, load-sensing hydraulic system with an electronically controlled variable-displacement piston pump. Customers will experience increased travel performance and higher digging and lifting forces over earlier models. High Flow on the new 309 model provides dedicated flow to the auxiliary circuit for operating the most demanding hydromechanical attachments. 

For added versatility, when fitted with Cat hydraulic couplers and buckets, front-shovel operation, a capability that lends an extra measure of precision when digging around utilities is possible. In addition, all models come with thumb-ready sticks which can be easily fitted to during or after purchase.

The 307.5, 308 CR, and 309 CR come equipped with a standard undercarriage length, while the 309 has the option of a long undercarriage. The 310 is available with a long undercarriage only, which is designed for added stability.

A dozer blade further expands the capability of the all models, allowing the machine to handle backfilling and grading tasks. The blade features ample travel, above and below grade, and has a float function. Major structures for the Next Generation mini machines—upper and lower frames, track frames, boom, and stick—are patterned after their larger Cat excavator counterparts and designed for long-term durability.

Routine maintenance check points are accessible at ground level through the side doors, and the battery is maintenance-free. Side panels are flat and recessed to protect them from damage and have been designed for easy replacement. 


Product Specifications



308 CR

309 CR


Min. weight, kg

7 532

8 146

8 756

9 601

Max. weight, kg

8 223

9 380

9 403

10 182

Tail swing





Dig depth, Std stick mm



4 115

5 174

Dig depth, Long stick mm

4 649

4 644

4 650



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.

CAT, CATERPILLAR, their respective logos, “Caterpillar Yellow” and the “Power Edge” trade dress, as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.

©2018 Caterpillar All Rights Reserved


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