304 Mini Excavator

Overview

The Cat^® 304 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.

Key Features

More Comfort. More Performance. More Versatility.

4 Industry First Features

Cat Exclusives in a Mini Excavator

Up to 10% Lower Total Ownership Costs

with extended service intervals, lower repair costs and easy service access

Up to 20% More Performance

in lifting, digging and multi-function capability

Media Gallery

Specifications

Gross Power - ISO 14396	48.4 hp
Net Power	45 hp
Engine Model	C1.7 Turbo
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC	45 hp
Bore	3.3 in
Stroke	3.9 in
Displacement	101 in³
Emissions	Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Note	Net power advertised is the power available at the flywheel when the engine is at rated speed and rated power when the engine is installed with the factory configured fan, air intake system, exhaust system, and alternator with a minimum alternator load.

Operating Weight	9867 lb
Minimum Operating Weight with Canopy*	8655 lb
Maximum Operating Weight with Canopy**	9647 lb
Minimum Operating Weight with Cab*	8875 lb
Maximum Operating Weight with Cab**	9867 lb
Note (1)	*Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, straight blade, no bucket and no extra counterweight.
Note (2)	**Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, straight blade, extra counterweight and no bucket.

Counterweight	496 lb
Long Stick	66 lb
Steel Tracks	430 lb
Angle Blade	243 lb

Travel Speed - High	3.2 mile/h
Travel Speed - Low	2.2 mile/h
Maximum Traction Force - High Speed	4271 lbf
Maximum Traction Force - Low Speed	7329 lbf
Ground Pressure - Minimum Weight	4.2 psi
Ground Pressure - Maximum Weight	4.9 psi
Gradeability - Maximum	30 degrees

Cooling System	2.9 gal (US)
Engine Oil	1.6 gal (US)
Fuel Tank	17 gal (US)
Hydraulic Tank	14 gal (US)
Hydraulic System	17 gal (US)

Type	Load Sensing Hydraulics with Variable Displacement Piston Pump
Pump Flow at 2,400 rpm	25 gpm
Operating Pressure - Equipment	3553 psi
Operating Pressure - Travel	3553 psi
Operating Pressure - Swing	2611 psi
Auxiliary Circuit - Primary - Flow	21 gpm
Auxiliary Circuit - Primary - Pressure	3553 psi
Auxiliary Circuit - Secondary - Flow	7 gpm
Auxiliary Circuit - Secondary - Pressure	3553 psi
Digging Force - Stick - Standard	4721 lbf
Digging Force - Stick - Long	4316 lbf
Digging Force - Bucket	8588 lbf
Note	Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Machine Swing Speed	9 r/min
Boom Swing - Left	78 Degrees
Boom Swing - Right	50 Degrees

Straight Blade Width	66.9 in
Straight Blade Height	14.2 in
Angle Blade Width	66.9 in
Angle Blade Height	14.2 in
Angle Blade - Left	25 Degrees
Angle Blade - Right	25 Degrees

Roll Over Protective Structure (ROPS)	ISO 12117-2:2008
Top Guard	ISO 10262:1998 (Level I)

Dig Depth	126.4 in
Vertical Wall	94.3 in
Maximum Reach - Ground Level	204.7 in
Maximum Reach	209.8 in
Maximum Dig Height	198.4 in
Maximum Dump Clearance	143.5 in
Boom In Reach	88.8 in
Tail Swing without Counterweight	47.4 in
Tail Swing with Counterweight	51.2 in
Maximum Blade Height	16.5 in
Maximum Blade Depth	18.7 in
Boom Height - Shipping Position	63.8 in
O/A Shipping Height	100 in
Swing Bearing - Height	21.9 in
O/A Undercarriage Length	87 in
Overall Shipping Length*	194.9 in
Boom Swing - Right	28.7 in
Boom Swing - Left	20.9 in
Track Belt/Shoe Width	13.8 in
Track Width	66.9 in
Ground Clearance	12 in
Stick Length	54.9 in
Note	*Overall Shipping Length depends on blade position during shipment.

Dig Depth	138.2 in
Vertical Wall	99.8 in
Maximum Reach - Ground Level	214.4 in
Maximum Reach	219.3 in
Maximum Dig Height	201.8 in
Maximum Dump Clearance	147.2 in
Boom In Reach	92.1 in
Tail Swing without Counterweight	47.4 in
Tail Swing with Counterweight	51.2 in
Maximum Blade Height	16.5 in
Maximum Blade Depth	18.7 in
Boom Height - Shipping Position	75.2 in
O/A Shipping Height	100 in
Swing Bearing - Height	21.9 in
O/A Undercarriage Length	87 in
Overall Shipping Length*	194.9 in
Boom Swing - Right	28.7 in
Boom Swing - Left	20.9 in
Track Belt/Shoe Width	13.8 in
Track Width	66.9 in
Ground Clearance	12 in
Stick Length	66.7 in
Note	*Overall Shipping Length depends on blade position during shipment.

Air Conditioning	The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1.0 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).

Air Conditioning

The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1.0 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).