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.
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 |
Engine
Net Power |
13 HP |
Engine Model |
Yanmar 31NV70 |
Rated Speed |
2100 r/min |
Maximum Engine Output |
18 HP |
Gross Power - ISO 14396 |
18 HP |
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 |
Emissions |
Meets U.S. EPA Tier 4 Final/EU Stage V emission standards. |
Weights
Operating Weight - Without Safety Frame |
935 kg |
Operating Weight - With Safety Frame |
985 kg |
Operating Weight |
935 kg |
Dimensions
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.
Serviceability
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.
- 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
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