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Caterpillar is pleased to announce the introduction of the 300.9D sub 3 tonne mini excavator machine. The 300.9D expands the Cat® Mini Excavator offering. Most notably, the new 300.9D sub 1 tonne class provides customers with a lower cost unit for entrance into MHE ownership.


Engine Model Yanmar 31NV70 Yanmar 31NV70 Less
Net Power 13.0 hp 9.6 kW Less
Gross Power 18.0 hp 13.7 kW Less
Rated speed 2100.0 RPM 2100.0 RPM Less


Operating Weight 2060.0 lb 935.0 kg Less
Transport weight without Safety frame 2060.0 lb 935.0 kg Less
Transport weight with Safety frame 2170.0 lb 985.0 kg Less


Ground Clearance 5.0 in 127.0 mm Less

Engine Dimensions

Displacement 52.0 in3 854.0 L Less

Travel System

Travel Speed 1.12 mph 1.8 km/h Less
Ground Pressure 3.5 psi 0.25 kPa Less
Gradeability 30°/58% 30°/58% Less

Hydraulic System

Digging Force – Bucket 2000.0 lb 8.9 kN Less
Pumps 2 gear pumps 2 gear pumps Less
Operating Pressure – Travel 2466.0 psi 170.0 bar Less
Digging Force – Stick 1011.0 lb 4.5 kN Less
Operating Pressure – Swing 1015.0 psi 70.0 bar Less
Discharge capacity 11.4 + 11.4 L/min (3 + 3 gal/min) 11.4 + 11.4 L/min (3 + 3 gal/min) Less

Swing System

Machine Swing Speed 8.0 RPM 8.0 RPM Less

Sound Levels

Sound power level (LWA) (to 2000/14/EG) 93.0 dB(A) 93.0 dB(A) Less


Width 27.5 in 700.0 mm Less
Height 8.0 in 200.0 mm Less
Dig Depth 8.0 in 174.0 mm Less
Lift Height 7.0 in 197.0 mm Less

Service Refill Capacities

Hydraulic Tank 3.7 gal 14.0 L Less
Fuel Tank 2.64 gal 10.0 L Less


Track width 7.0 in 180.0 mm Less

Compact Dimensions

Easy site access

Performance and Durability

Powerful performance, Robust construction, Work tool ready

User Friendly Operation

Simple controls – Easily maintained

Customer Support

Low operating costs with excellent services and options

300.9D Standard Equipment

• Rubber belt track, 180 mm (7 in) wide

• Dozer blade, with side extensions

• Extending undercarriage (71cm/28in) - (86cm/34in)

• Adjustable vinyl seat

• Retractable seatbelt

• Boom mounted work light

• Auxiliary hydraulic circuit, with one-way (hammer) lines to stick

• Ecology drain for hydraulic tank

300.9D Optional Equipment

• Buckets: 250 mm (10 in); 350 mm (15 in); 700 mm (2 ft 4 in)

• Custom color paint

• Hammer

• Front guard

• 2 way (auger) auxiliary lines to the stick

• Rotating beacon

• Bio oil

Our Customers Say It Best - Blain Gibson

"Caterpillar makes my job easy because the technology on their newer equipment helps the job go faster."

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Mini Hydraulic Excavators Coupler and Attachments - Video

Watch the illustration to learn how the Cat® dual lock pin grabber coupler disengages with the bucket on Cat Mini Excavators.

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