300.9D Mini Hydraulic Excavator

Compact Dimensions

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.

Simple Controls

The operator area is spacious and laid out to provide comfort and ease of operation. Smooth, precise operation is possible from easy to use controls allowing all skill levels to be productive with little practice.

Easy Service

Service and maintenance time is reduced to a minimum with a simple to open steel engine cover and all maintenance and greasing points easily accessible.


A range of tools is available to take advantage of the machine’s versatility. All tools are matched to the machine to optimize performance and deliver excellent value through high productivity and long life.

Operational Data
Operating Weight - Without Safety Frame 935 kg (2061 lb)
Digging Force - Bucket 8.9 kN (2000 lb)
Digging Force - Stick 4.5 kN (1011 lb)
Operating Weight - With Safety Frame 985 kg (2170 lb)
Net Power 9.6 kW (13 HP)
Engine Model Yanmar 31NV70
Rated Speed 2100 r/min (2100 r/min)
Maximum Engine Output 13.7 kW (18 HP)
Gross Power - ISO 14396 13.7 kW (18 HP)
Diesel Tank Volume 10 l (2.64 gal (US))
Displacement 854 cmu00b3 (52 inu00b3)
Flywheel Output ISO 9.6 kW (13 HP)
Battery 12 V, 20 Amp
Type Water cooled model 3-cylinder diesel engine
Make/Type Yanmar 31NV70
Emissions Meets U.S. EPA Tier 4 Final/EU Stage V emission standards.
Operating Weight - Without Safety Frame 935 kg (2061 lb)
Operating Weight - With Safety Frame 985 kg (2170 lb)
Operating Weight 935 kg (2061 lb)
Dig Depth 1731 mm (68 in)
Undercarriage Width - Extended 864 mm (2.83 ft)
Width 730 mm (2.4 ft)
Height - With ROPS Safety Frame Folded Down 1507 mm (4.94 ft)
Maximum Dump Height 2035 mm (6.68 ft)
Maximum Dozer Lift Height 197 mm (8 in)
Length - Undercarriage 1220 mm (4 ft)
Maximum Vertical Dig Depth 1349 mm (4.43 ft)
Minimum Front Linkage Swing Radius 1150 mm (3.77 ft)
Boom Swing Angle - Left 55 u00b0 (55 u00b0)
Undercarriage Width - Retracted 711 mm (2.33 ft)
Boom Swing Angle - Right 56 u00b0 (56 u00b0)
Maximum Reach 3074 mm (10.09 ft)
Maximum Reach - Ground Level 3023 mm (9.92 ft)
Transport Length - Arm Lowered 2746 mm (9 ft)
Track Width 180 mm (7 in)
Tail Swing Radius 736 mm (2.41 ft)
Maximum Dozer Dig Depth 174 mm (7 in)
Maximum Dig Height 2863 mm (9.39 ft)
Height - With ROPS Safety Frame Unfolded 2276 mm (7.47 ft)
Hydraulic System
Pumps 2 gear pumps
Discharge Capacity 11.4 + 11.4 L/min (3 + 3 gal/min)
Operating Pressure for the Work and Travel Hydraulics 170 bar (2466 psi)
Operating Pressure Pivot 70 bar (1015 psi)
Hydraulic Tank Capacity 14 l (3.7 gal (US))
Chassis and Swivel Gear
Gradeability 30u00b0/58%
Travel Speed 1.8 km/h (1.12 mile/h)
Track Width 180 mm (7 in)
Ground Clearance 127 mm (5 in)
Ground Pressure 0.25 kg/cmu00b2 (3.5 psi)
Machine Swing Speed 8 r/min (8 r/min)
Number of Rollers - Each Side 2
Operating Specifications
Stick Length - Standard 890 mm (34.8 in)
Machine Overhang 318 mm (12.5 in)
Dozer Blade
Height 200 mm (8 in)
Dig Depth 174 mm (7 in)
Width 700 mm (28 in)
Lift Height 197 mm (8 in)
Noise Emissions
Sound Power Level (LWA) (to 2000/14/EG) 93 dB(A) (93 dB(A))

Optional Equipment

  • 2 way (auger) auxiliary lines to the stick (not available in all regions)
  • Bio oil
  • Buckets: 250 mm (10 in); 350 mm (15 in); 700 mm (2 ft 4 in)
  • Custom color paint
  • Front guard
  • Hammer
  • Rotating beacon

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