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Overview – CAT 300.9D Mini Excavator

With an overall width of only 730 mm (2 ft 5 in) the Cat® 300.9D can easily drive through narrow passages and doors. Both indoor and outdoor jobs are now accessible with the under 1000 kg (2,205 lb) weight making easy trailer transportation between sites possible.

Extending Undercarriage and Blade

An extending undercarriage and fold out dozer blade allow the machine to be configured for excellent working stability and optimum performance. Easy retraction, controlled from the operator’s seat, enables the machine to pass through narrow openings.

Foldable Safety Frame

A protective ROPS safety frame structure mounted on the front of the machine allows fitting of a guard for extra operator protection during hammer use. The structure folds down in a few seconds for easy machine transportation and storage.

Powerful Engine and Hydraulics

The 13.7 kW (18 hp) engine and perfectly matched hydraulics provide efficient, economical and reliable performance for the toughest of jobs. The matched cooling system is designed to accommodate working within confined areas and also the powerful Cat® hammer. Low noise and vibration levels deliver comfortable operation.


Digging force – Bucket 8.9 kN
Digging force – Stick 4.5 kN
Operating weight with Safety frame 985.0 kg
Operating weight without Safety frame 935.0 kg


Engine Model Yanmar 31NV70
Net Power 9.6 kW
Rated speed 2100.0 RPM
Battery 12 V, 20 Amp
Diesel tank volume 10.0 L
Displacement 854.0 cm3
Flywheel output ISO 9.6 kW
Gross Power (ISO 14396) 13.7 kW
Make/type Yanmar 31NV70
Maximum engine output 13.7 kW
Type Water cooled model 3-cylinder diesel engine