New | 300.9D Mini Hydraulic Excavator

Caterpillar is pleased to announce the introduction of the 300.9D sub 3 tonnemini 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.

Operational Data
Operating Weight - Without Safety Frame2061 lb
Digging Force - Bucket2000 lb
Digging Force - Stick1011 lb
Operating Weight - With Safety Frame2170 lb
Engine ModelYanmar 31NV70
Net Power13 HP
Rated Speed2100 r/min
Maximum Engine Output18 HP
Gross Power - ISO 1439618 HP
Diesel Tank Volume2.64 gal (US)
Displacement52 in³
Flywheel Output ISO13 HP
Battery12 V, 20 Amp
TypeWater cooled model 3-cylinder diesel engine
Make/TypeYanmar 31NV70
Operating Weight - Without Safety Frame2061 lb
Operating Weight - With Safety Frame2170 lb
Operating Weight2061 lb
Undercarriage Width - Extended2.83 ft
Width2.4 ft
Height - With ROPS Safety Frame Folded Down4.94 ft
Maximum Dump Height6.68 ft
Maximum Digging Depth5.68 ft
Maximum Dozer Lift Height8 in
Length - Undercarriage4 ft
Maximum Vertical Dig Depth4.43 ft
Minimum Front Linkage Swing Radius3.77 ft
Boom Swing Angle - Left55 °
Undercarriage Width - Retracted2.33 ft
Boom Swing Angle - Right56 °
Maximum Reach10.09 ft
Maximum Reach - Ground Level9.92 ft
Transport Length - Arm Lowered9 ft
Track Width7 in
Tail Swing Radius2.41 ft
Maximum Dozer Dig Depth7 in
Maximum Dig Height9.39 ft
Height - With ROPS Safety Frame Unfolded7.47 ft
Hydraulic System
Pumps2 gear pumps
Discharge Capacity11.4 + 11.4 L/min (3 + 3 gal/min)
Operating Pressure for the Work and Travel Hydraulics2466 psi
Operating Pressure Pivot1015 psi
Hydraulic Tank Capacity3.7 gal (US)
Chassis and Swivel Gear
Travel Speed1.12 mile/h
Track Width7 in
Ground Clearance5 in
Ground Pressure3.5 psi
Machine Swing Speed8 r/min
Number of Rollers - Each Side2
Operating Specifications
Stick Length - Standard34.8 in
Machine Overhang12.5 in
Dozer Blade
Height8 in
Dig Depth7 in
Width28 in
Lift Height8 in
Noise Emissions
Sound Power Level (LWA) (to 2000/14/EG)93 dB(A)

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.

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.

Hose and Cylinder Protection

Bucket hoses are well protected within the boom and the cylinder is mounted above the structure to increase the machines durability for working in tough environments. The clean lines of the front linkage also provide excellent visibility to the digging area.

Auxiliary Hydraulics as Standard

The 300.9D is fitted with auxiliary lines for hammer operation routed down to the stick. Locating the connecting point close to the work tool reduces connecting hose lengths and potential for damage.

Simple Controls (Ease of Use)

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

Extending Dozer Blade

Blade extensions simply rotate and lock into position allowing the machine to be quickly configured for narrow width or maximum blade coverage. Locking pins and extension plates are retained with the machine to reduce potential for lost or damaged components.


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.

Customer Support

Product supported through the Cat dealer and worldwide parts network aimed at minimizing downtime.

  • Finance options
  • Warranty options
  • Maintenance contracts
  • Help and advice in product and option selection to maximize efficiency and operating profitability

Work Tools

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

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
Rotating beacon







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