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300.9D Mini Hydraulic Excavator

300.9D Mini Hydraulic Excavator

At a Glance

Net Power
13 HP
Operating Weight
2061 lb
Maximum Digging Depth
5.68 ft
Engine Model
Yanmar 31NV70
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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.


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Net Power 13HP
Engine Model Yanmar 31NV70
Rated Speed 2100r/min
Flywheel Output ISO 13HP
Displacement 52in³
Emissions Meets U.S. EPA Tier 4 Final/EU Stage V emission standards.
Diesel Tank Volume 2.64gal (US)
Battery 12 V, 20 Amp
Type Water cooled model 3-cylinder diesel engine
Maximum Engine Output 18HP
Make/Type Yanmar 31NV70
Gross Power - ISO 14396 18HP


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Operating Weight 2061lb
Operating Weight - Without Safety Frame 2061lb
Operating Weight - With Safety Frame 2170lb


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Maximum Digging Depth 5.68ft
Maximum Dump Height 6.68ft
Maximum Dozer Lift Height 8in
Length - Undercarriage 4ft
Maximum Dozer Dig Depth 7in
Maximum Dig Height 9.39ft
Height - With ROPS Safety Frame Unfolded 7.47ft
Height - With ROPS Safety Frame Folded Down 4.94ft
Boom Swing Angle - Right 56°
Boom Swing Angle - Left 55°
Width 2.4ft
Undercarriage Width - Retracted 2.33ft
Undercarriage Width - Extended 2.83ft
Transport Length - Arm Lowered 9ft
Track Width 7in
Tail Swing Radius 2.41ft
Minimum Front Linkage Swing Radius 3.77ft
Maximum Vertical Dig Depth 4.43ft
Maximum Reach - Ground Level 9.92ft
Maximum Reach 10.09ft

Hydraulic System

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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

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

Operating Specifications

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Machine Overhang 12.5in
Stick Length - Standard 34.8in

Chassis and Swivel Gear

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

Noise Emissions

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

Dozer Blade

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