300.9D Mini Hydraulic Excavator

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


Net Power 13HP
Engine Model Yanmar 31NV70
Rated Speed 2100r/min
Maximum Engine Output 18HP
Gross Power - ISO 14396 18HP
Diesel Tank Volume 2.64gal (US)
Displacement 52in³
Flywheel Output ISO 13HP
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 2061lb
Operating Weight - Without Safety Frame 2061lb
Operating Weight - With Safety Frame 2170lb


Dig Depth 68in
Undercarriage Width - Extended 2.83ft
Width 2.4ft
Height - With ROPS Safety Frame Folded Down 4.94ft
Maximum Dump Height 6.68ft
Maximum Dozer Lift Height 8in
Length - Undercarriage 4ft
Maximum Vertical Dig Depth 4.43ft
Minimum Front Linkage Swing Radius 3.77ft
Boom Swing Angle - Left 55°
Undercarriage Width - Retracted 2.33ft
Boom Swing Angle - Right 56°
Maximum Reach 10.09ft
Maximum Reach - Ground Level 9.92ft
Transport Length - Arm Lowered 9ft
Track Width 7in
Tail Swing Radius 2.41ft
Maximum Dozer Dig Depth 7in
Maximum Dig Height 9.39ft
Height - With ROPS Safety Frame Unfolded 7.47ft

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 2466psi
Operating Pressure Pivot 1015psi
Hydraulic Tank Capacity 3.7gal (US)

Operational Data

Operating Weight - Without Safety Frame 2061lb
Digging Force - Bucket 2000lb
Digging Force - Stick 1011lb
Operating Weight - With Safety Frame 2170lb

Chassis and Swivel Gear

Gradeability 30°/58%
Travel Speed 1.12mile/h
Track Width 7in
Ground Clearance 5in
Ground Pressure 3.5psi
Machine Swing Speed 8r/min
Number of Rollers - Each Side 2

Operating Specifications

Stick Length - Standard 34.8in
Machine Overhang 12.5in

Dozer Blade

Height 8in
Dig Depth 7in
Width 28in
Lift Height 8in

Noise Emissions

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

Standard Equipment

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