Overview
The Cat® 305.5E2 CR Mini Hydraulic Excavator delivers high performance, durability and versatility in a compact design to help you work in a variety of applications.
Engine
Units:
| Engine Model | Cat® C2.4 | Cat® C2.4 |
| Net Power | 44.1 HP | 32.9 kW |
| Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 | 44.1 HP | 32.9 kW |
| Bore | 3.4 in | 87.0 mm |
| Displacement | 146.0 in³ | 2.4 l |
| Stroke | 4.0 in | 102.4 mm |
| Emissions | Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards. | Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards. |
| Gross Power - ISO 14396 | 45.7 HP | 34.1 kW |
Weights*
| Operating Weight | 11958.0 lb | 5423.0 kg |
| Weight - Canopy, Standard Stick | 11503.0 lb | 5217.0 kg |
| Note | *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines. | *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines. |
| Weight - Cab, Long Stick | 11958.0 lb | 5423.0 kg |
| Weight - Cab, Standard Stick | 11863.0 lb | 5380.0 kg |
| Weight - Canopy, Long Stick | 11596.0 lb | 5259.0 kg |
Travel System
| Maximum Traction Force - High Speed | 6025.0 lb | 26.8 kN |
| Maximum Traction Force - Low Speed | 10746.0 lb | 47.8 kN |
| Travel Speed - High | 2.8 mile/h | 4.5 km/h |
| Travel Speed - Low | 1.7 mile/h | 2.8 km/h |
| Gradeability - Maximum | 30° | 30° |
| Ground Pressure - Cab | 4.6 psi | 31.9 kPa |
| Ground Pressure - Canopy | 4.5 psi | 31.0 kPa |
Hydraulic System
| Auxiliary Circuit - Primary (186 bar/2,734 psi) | 21.1 gal/min | 80.0 l/min |
| Auxiliary Circuit - Secondary (174 bar/2,524 psi) | 6.6 gal/min | 25.0 l/min |
| Digging Force - Stick - Long | 5575.0 lb | 24.8 kN |
| Digging Force - Stick - Standard | 6500.0 lb | 28.9 kN |
| Operating Pressure - Equipment | 3553.0 psi | 245.0 bar |
| Operating Pressure - Swing | 3132.0 psi | 216.0 bar |
| Operating Pressure - Travel | 3553.0 psi | 245.0 bar |
| Pump Flow at 2,400 rpm | 39.6 gal/min | 150.0 l/min |
| Digging Force - Bucket | 11445.0 lb | 50.9 kN |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Swing System
| Machine Swing Speed | 10.0 r/min | 10.0 r/min |
| Boom Swing - Left - With Stop* | 60° | 60° |
| Boom Swing - Left - Without Stop* | 80° | 80° |
| Boom Swing - Right | 50° | 50° |
| Note | *Automatic swing brake, spring applied, hydraulic release. | *Automatic swing brake, spring applied, hydraulic release. |
Blade
| Width | 78.0 in | 1980.0 mm |
| Height | 14.8 in | 375.0 mm |
| Dig Depth | 21.9 in | 555.0 mm |
| Lift Height | 15.9 in | 405.0 mm |
Service Refill Capacities
| Cooling System | 2.8 gal (US) | 10.5 l |
| Engine Oil | 2.5 gal (US) | 9.5 l |
| Fuel Tank | 16.6 gal (US) | 63.0 l |
| Hydraulic System | 20.6 gal (US) | 78.0 l |
| Hydraulic Tank | 18.0 gal (US) | 68.3 l |
Cab
| Dynamic Operator Sound Pressure Level (ISO 6396:2008) | 81.0 dB(A) | 81.0 dB(A) |
| Exterior Sound Power Level - ISO 6395:2008* | 97.0 dB(A) | 97.0 dB(A) |
| Note | *European Union Directive “2000/14/EC” | *European Union Directive “2000/14/EC” |
Certification - Cab and Canopy
| Roll Over Protective Structure (ROPS) | ISO 12117-2 | ISO 12117-2 |
| Tip Over Protective Structure (TOPS) | ISO 12117 | ISO 12117 |
| Top Guard | ISO 10262 (Level I) | ISO 10262 (Level I) |
Dimensions - Long Stick
| Boom Height - Shipping Position | 85.0 in | 2150.0 mm |
| Boom In Reach | 100.0 in | 2530.0 mm |
| Boom Swing - Left | 27.0 in | 695.0 mm |
| Boom Swing - Right | 31.0 in | 785.0 mm |
| Dig Depth | 152.0 in | 3870.0 mm |
| Maximum Blade Depth | 22.0 in | 555.0 mm |
| Maximum Blade Height | 16.0 in | 405.0 mm |
| Maximum Dig Height | 220.0 in | 5590.0 mm |
| Maximum Dump Clearance | 161.0 in | 4080.0 mm |
| Maximum Reach | 243.0 in | 6170.0 mm |
| Maximum Reach - Ground Level | 237.0 in | 6020.0 mm |
| O/A Shipping Height | 100.0 in | 2550.0 mm |
| O/A Shipping Length | 215.0 in | 5460.0 mm |
| O/A Track Width | 78.0 in | 1980.0 mm |
| O/A Undercarriage Length | 102.0 in | 2580.0 mm |
| Swing Bearing - Height | 24.0 in | 615.0 mm |
| Tail Swing | 44.0 in | 1130.0 mm |
| Track Belt/Shoe Width | 16.0 in | 400.0 mm |
| Vertical Wall | 107.0 in | 2730.0 mm |
Dimensions - Standard Stick
| Boom Height - Shipping Position | 69.0 in | 1740.0 mm |
| Boom In Reach | 94.0 in | 2400.0 mm |
| Boom Swing - Left | 27.0 in | 695.0 mm |
| Boom Swing - Right | 31.0 in | 785.0 mm |
| Dig Depth | 137.0 in | 3470.0 mm |
| Maximum Blade Depth | 22.0 in | 555.0 mm |
| Maximum Blade Height | 16.0 in | 405.0 mm |
| Maximum Dig Height | 210.0 in | 5330.0 mm |
| Maximum Dump Clearance | 150.0 in | 3820.0 mm |
| Maximum Reach | 228.0 in | 5790.0 mm |
| Maximum Reach - Ground Level | 222.0 in | 5630.0 mm |
| O/A Shipping Height | 100.0 in | 2550.0 mm |
| O/A Shipping Length | 210.0 in | 5330.0 mm |
| O/A Track Width | 78.0 in | 1980.0 mm |
| O/A Undercarriage Length | 102.0 in | 2580.0 mm |
| Swing Bearing - Height | 24.0 in | 615.0 mm |
| Tail Swing | 44.0 in | 1130.0 mm |
| Track Belt/Shoe Width | 16.0 in | 400.0 mm |
| Vertical Wall | 92.0 in | 2330.0 mm |
Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (9'8”)
| Blade Down - Front | 5710.0 lb | 2590.0 kg |
| Blade Down - Side | 2844.0 lb | 1290.0 kg |
| Blade Up - Front | 3417.0 lb | 1550.0 kg |
| Blade Up - Side | 2535.0 lb | 1150.0 kg |
Lift Capacities at Ground Level - Lift Point Radius: 4500 mm (14'9”)
| Blade Down - Front | 3042.0 lb | 1380.0 kg |
| Blade Down - Side | 1521.0 lb | 690.0 kg |
| Blade Up - Front | 1808.0 lb | 820.0 kg |
| Blade Up - Side | 1367.0 lb | 620.0 kg |
Operating Specifications
| Counterweight | 364.4 lb | 165.3 kg |
| Stick Length - Long | 70.0 in | 1820.0 mm |
| Stick Length - Standard | 55.0 in | 1420.0 mm |
Undercarriage
| Number of Carrier Rollers | 3 | 3 |
| Number of Track Rollers | 3 | 3 |
| Track Roller Type | Triple Flange | Triple Flange |
