The Caterpillar 304E2 CR is a compact mini excavator designed for construction, utility, landscaping, and site preparation work in confined spaces. It features a reduced tail swing design for improved maneuverability near walls, roads, and other obstacles. The 304E2 CR is part of Caterpillar's 4-ton class mini excavator lineup and is commonly used for digging, trenching, grading, and material handling. Typical configurations include a diesel engine, hydraulic auxiliary circuits, and a comfortable operator station. Its compact size, transportability, and versatility make it suitable for urban job sites and applications requiring precise control in limited working areas.
Air Conditioning System
Caterpillar 304E2 CR Mini Excavator Air Conditioning System specifications
Air Conditioning
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.4 metric tonnes.
Blade
Caterpillar 304E2 CR Mini Excavator Blade specifications
Dig Depth
18.50 in (46.99 cm)
Height
12.80 in (32.51 cm)
Lift Height
15.70 in (39.88 cm)
Width
6.40 ft (1.95 m)
Cab
Caterpillar 304E2 CR Mini Excavator Cab specifications
Dynamic Operator Sound Pressure Level (Iso 6396:2008)
81 dB(A)
Exterior Sound Power Level - Iso 6395:2008*
96 dB(A)
Note
*European Union Directive 2000/14/EC
Certification - Cab And Canopy
Caterpillar 304E2 CR Mini Excavator Certification - Cab And Canopy specifications
Roll Over Protective Structure (Rops)
ISO 12117-2
Tip Over Protective Structure (Tops)
ISO 12117
Top Guard
ISO 10262 (Level I)
Dimensions - Long Stick
Caterpillar 304E2 CR Mini Excavator Dimensions - Long Stick specifications
Boom Height - Shipping Position
70.00 in (177.80 cm)
Boom In Reach
87.00 in (220.98 cm)
Boom Swing - Left
26.00 in (66.04 cm)
Boom Swing - Right
29.00 in (73.66 cm)
Dig Depth
135.00 in (342.90 cm)
Maximum Blade Depth
19.00 in (48.26 cm)
Maximum Blade Height
16.00 in (40.64 cm)
Maximum Dig Height
200.00 in (508.00 cm)
Maximum Dump Clearance
145.00 in (368.30 cm)
Maximum Reach
220.00 in (558.80 cm)
Maximum Reach - Ground Level
215.00 in (546.10 cm)
O/A Shipping Height
98.00 in (248.92 cm)
O/A Shipping Length
194.00 in (492.76 cm)
O/A Track Width
77.00 in (195.58 cm)
O/A Undercarriage Length
87.00 in (220.98 cm)
Swing Bearing - Height
22.00 in (55.88 cm)
Tail Swing
38.00 in (96.52 cm)
Track Belt/Shoe Width
14.00 in (35.56 cm)
Vertical Wall
101.00 in (256.54 cm)
Dimensions - Standard Stick
Caterpillar 304E2 CR Mini Excavator Dimensions - Standard Stick specifications
Boom Height - Shipping Position
58.00 in (147.32 cm)
Boom In Reach
83.00 in (210.82 cm)
Boom Swing - Left
26.00 in (66.04 cm)
Boom Swing - Right
29.00 in (73.66 cm)
Dig Depth
123.00 in (312.42 cm)
Maximum Blade Depth
19.00 in (48.26 cm)
Maximum Blade Height
16.00 in (40.64 cm)
Maximum Dig Height
196.00 in (497.84 cm)
Maximum Dump Clearance
141.00 in (358.14 cm)
Maximum Reach
211.00 in (535.94 cm)
Maximum Reach - Ground Level
206.00 in (523.24 cm)
O/A Shipping Height
98.00 in (248.92 cm)
O/A Shipping Length
190.00 in (482.60 cm)
O/A Track Width
77.00 in (195.58 cm)
O/A Undercarriage Length
87.00 in (220.98 cm)
Swing Bearing - Height
22.00 in (55.88 cm)
Tail Swing
38.00 in (96.52 cm)
Track Belt/Shoe Width
14.00 in (35.56 cm)
Vertical Wall
95.00 in (241.30 cm)
Engine
Caterpillar 304E2 CR Mini Excavator Engine specifications
Bore
3.40 in (8.64 cm)
Displacement
146.00 cu in (2,392.52 cu cm)
Emissions
*Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
Engine Model
Cat C2.4
Gross Power - Iso 14396
41.80 hp (31.17 kw)
Net Power
40.20 hp (29.98 kw)
Rated Net Power - 2,200 Rpm - Iso 9249/Eec 80/1269
40.20 hp (29.98 kw)
Stroke
4.00 in (10.16 cm)
Hydraulic System
Caterpillar 304E2 CR Mini Excavator Hydraulic System specifications
Auxiliary Circuit - Primary (186 Bar/2,734 Psi)
18.50 gpm (70.02 lpm)
Auxiliary Circuit - Secondary (174 Bar/2,524 Psi)
6.60 gpm (24.98 lpm)
Digging Force - Bucket
8,498.00 lbs (3,854.63 kg)
Digging Force - Stick - Long
4,384.00 lbs (1,988.55 kg)
Digging Force - Stick - Standard
4,856.00 lbs (2,202.65 kg)
Hydraulic System Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Equipment
3553 psi
Operating Pressure - Swing
3132 psi
Operating Pressure - Travel
3553 psi
Pump Flow At 2,200 Rpm
26.40 gpm (99.92 lpm)
Lift Capacities At Ground Level - Lift Point Radius: 3000 Mm (118 In)
Caterpillar 304E2 CR Mini Excavator Lift Capacities At Ground Level - Lift Point Radius: 3000 Mm (118 In) specifications
Blade Down - Front
3,462.00 lbs (1,570.34 kg)
Blade Down - Side
2,007.00 lbs (910.36 kg)
Blade Up - Front
1,808.00 lbs (820.10 kg)
Blade Up - Side
1,808.00 lbs (820.10 kg)
Lift Capacities At Ground Level - Lift Point Radius: 4500 Mm (177 In)
Caterpillar 304E2 CR Mini Excavator Lift Capacities At Ground Level - Lift Point Radius: 4500 Mm (177 In) specifications
Blade Down - Front
1,896.00 lbs (860.01 kg)
Blade Down - Side
1,058.00 lbs (479.90 kg)
Blade Up - Front
948.00 lbs (430.01 kg)
Blade Up - Side
948.00 lbs (430.01 kg)
Operating Specifications
Caterpillar 304E2 CR Mini Excavator Operating Specifications specifications
Stick Length - Long
64.00 in (162.56 cm)
Stick Length - Standard
52.00 in (132.08 cm)
Operational
Caterpillar 304E2 CR Mini Excavator Operational specifications
Operating Weight
8,996.00 lbs (4,080.52 kg)
Service Refill Capacities
Caterpillar 304E2 CR Mini Excavator Service Refill Capacities specifications
Cooling System
1.50 gal (5.68 l)
Engine Oil
2.50 gal (9.46 l)
Fuel Tank
12.20 gal (46.18 l)
Hydraulic System
17.20 gal (65.10 l)
Hydraulic Tank
11.20 gal (42.39 l)
Swing System
Caterpillar 304E2 CR Mini Excavator Swing System specifications
Boom Swing - Left - With Stop*
55 degrees
Boom Swing - Left - Without Stop*
70 degrees
Machine Swing Speed
10 rpm
Note
*Automatic swing brake, spring applied, hydraulic release.
Travel System
Caterpillar 304E2 CR Mini Excavator Travel System specifications
Gradeability - Maximum
30 degrees
Ground Pressure - Cab
4.3 psi
Ground Pressure - Canopy
4.1 psi
Maximum Traction Force - High Speed
3,799.00 lbs (1,723.20 kg)
Maximum Traction Force - Low Speed
6,969.00 lbs (3,161.09 kg)
Travel Speed - High
3.20 mph (5.15 kph)
Travel Speed - Low
2.10 mph (3.38 kph)
Undercarriage
Caterpillar 304E2 CR Mini Excavator Undercarriage specifications
Number Of Carrier Rollers
1
Number Of Track Rollers
4
Track Roller Type
Center Flange
Weights*
Caterpillar 304E2 CR Mini Excavator Weights* specifications
Note
*Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Weight - Cab, Long Stick
8,996.00 lbs (4,080.52 kg)
Weight - Cab, Standard Stick
8,930.00 lbs (4,050.58 kg)
Weight - Canopy, Long Stick
8,721.00 lbs (3,955.78 kg)
Weight - Canopy, Standard Stick
8,655.00 lbs (3,925.85 kg)
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