• Banner
Mini Excavators

Caterpillar serves all regions of the world so we build many different configurations of hydraulic excavators. Your Cat® dealer has exact machine specifications available in your area to help you choose what will best meet your needs.

300.9D Mini Hydraulic Excavator

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.

  • Specification Summary

  • Operating Weight - Without Safety Frame 935 kg
  • Digging Force - Bucket 8.9 kN
  • Digging Force - Stick 4.5 kN
  • Operating Weight - With Safety Frame 985 kg
  • Product Brochure


Product Details

Operational Data

Operating Weight - Without Safety Frame 935 kg
Digging Force - Bucket 8.9 kN
Digging Force - Stick 4.5 kN
Operating Weight - With Safety Frame 985 kg


Net Power 9.6 kW
Engine Model Yanmar 31NV70
Rated Speed 2100 r/min
Maximum Engine Output 13.7 kW
Gross Power - ISO 14396 13.7 kW
Diesel Tank Volume 10 l
Displacement 854 cm³
Flywheel Output ISO 9.6 kW
Battery 12 V, 20 Amp
Type Water cooled model 3-cylinder diesel engine
Make/Type Yanmar 31NV70


Operating Weight - Without Safety Frame 935 kg
Operating Weight - With Safety Frame 985 kg
Operating Weight 935 kg


Maximum Digging Depth 1731 mm
Undercarriage Width - Extended 864 mm
Width 730 mm
Height - With ROPS Safety Frame Folded Down 1507 mm
Maximum Dump Height 2035 mm
Maximum Dozer Lift Height 197 mm
Length - Undercarriage 1220 mm
Maximum Vertical Dig Depth 1349 mm
Minimum Front Linkage Swing Radius 1150 mm
Boom Swing Angle - Left 55 °
Undercarriage Width - Retracted 711 mm
Boom Swing Angle - Right 56 °
Maximum Reach 3074 mm
Maximum Reach - Ground Level 3023 mm
Transport Length - Arm Lowered 2746 mm
Track Width 180 mm
Tail Swing Radius 736 mm
Maximum Dozer Dig Depth 174 mm
Maximum Dig Height 2863 mm
Height - With ROPS Safety Frame Unfolded 2276 mm

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
Operating Pressure Pivot 70 bar
Hydraulic Tank Capacity 14 l

Chassis and Swivel Gear

Gradeability 30°/58%
Travel Speed 1.8 km/h
Track Width 180 mm
Ground Clearance 127 mm
Ground Pressure 0.25 kg/cm²
Machine Swing Speed 8 r/min
Number of Rollers - Each Side 2

Operating Specifications

Stick Length - Standard 890 mm
Machine Overhang 318 mm

Dozer Blade

Height 200 mm
Dig Depth 174 mm
Width 700 mm
Lift Height 197 mm

Noise Emissions

Sound Power Level (LWA) (to 2000/14/EG) 93 dB(A)

Compact Dimensions

Easy site access

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.

Performance and Durability

Powerful performance, Robust construction, Work tool ready

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.

User Friendly Operation

Simple controls - Easily maintained

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

Low operating costs with excellent services and options

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.
  • Adjustable vinyl seat
    • Auxiliary hydraulic circuit, with one-way (hammer) lines to stick
      • Boom mounted work light
        • Dozer blade, with side extensions
          • Ecology drain for hydraulic tank
            • Hydraulic extending undercarriage
              • Retractable seatbelt
                • Rubber belt track, 180 mm (7 in) wide
                  • 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

                                Have a Question?


                                "Call Back Option available only for UAE, Bahrain, Kuwait, Oman and Qatar."