305.5E2 CR Mini Hydraulic Excavator
305.5E2 CR Mini Hydraulic Excavator
305.5E2 CR Mini Hydraulic Excavator
305.5E2 CR Mini Hydraulic Excavator

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.

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Net Power 44.1 HP
Engine Model Cat® C2.4
Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 44.1 HP
Bore 3.4 in
Stroke 4 in
Displacement 146 in³
Gross Power - ISO 14396 45.7 HP
Emissions Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
Operating Weight 11958 lb
Weight - Canopy, Standard Stick 11503 lb
Weight - Cab, Long Stick 11958 lb
Note *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Weight - Cab, Standard Stick 11863 lb
Weight - Canopy, Long Stick 11596 lb
Travel Speed - High 2.8 mile/h
Maximum Traction Force - High Speed 6025 lb
Travel Speed - Low 1.7 mile/h
Maximum Traction Force - Low Speed 10746 lb
Ground Pressure - Canopy 4.5 psi
Ground Pressure - Cab 4.6 psi
Gradeability - Maximum 30°
Operating Pressure - Travel 3553 psi
Digging Force - Stick - Long 5575 lb
Operating Pressure - Swing 3132 psi
Operating Pressure - Equipment 3553 psi
Digging Force - Stick - Standard 6500 lb
Pump Flow at 2,400 rpm 39.6 gal/min
Maximum Auxiliary Circuit - Primary - Pressure 3553 psi
Maximum Auxiliary Circuit - Secondary - Pressure 3553 psi
Maximum Auxiliary Circuit - Secondary - Flow 6.6 gal/min
Maximum Auxiliary Circuit - Primary - Flow 21.1 gal/min
Digging Force - Bucket 11445 lb
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Machine Swing Speed 10 r/min
Boom Swing - Right 50°
Boom Swing - Left - Without Stop* 80°
Boom Swing - Left - With Stop* 60°
Note *Automatic swing brake, spring applied, hydraulic release.
Width 78 in
Height 14.8 in
Dig Depth 21.9 in
Lift Height 15.9 in
Hydraulic Tank 18 gal (US)
Cooling System 2.8 gal (US)
Fuel Tank 16.6 gal (US)
Engine Oil 2.5 gal (US)
Hydraulic System 20.6 gal (US)
Dig Depth 152 in
Boom Swing - Right 31 in
O/A Shipping Length 215 in
Vertical Wall 107 in
O/A Shipping Height 100 in
Maximum Blade Depth 22 in
Maximum Dump Clearance 161 in
Maximum Reach - Ground Level 237 in
Maximum Blade Height 16 in
Tail Swing 44 in
Swing Bearing - Height 24 in
Maximum Dig Height 220 in
Boom Swing - Left 27 in
Track Belt/Shoe Width 16 in
Maximum Reach 243 in
O/A Track Width 78 in
Boom In Reach 100 in
O/A Undercarriage Length 102 in
Boom Height - Shipping Position 85 in
Stick Length - Long 70 in
Counterweight 364.4 lb
Stick Length - Standard 55 in
Boom In Reach 94 in
O/A Shipping Height 100 in
Dig Depth 137 in
Maximum Blade Depth 22 in
Track Belt/Shoe Width 16 in
O/A Undercarriage Length 102 in
Maximum Blade Height 16 in
O/A Shipping Length 210 in
Maximum Reach - Ground Level 222 in
Boom Swing - Right 31 in
Maximum Dig Height 210 in
Vertical Wall 92 in
Tail Swing 44 in
Boom Height - Shipping Position 69 in
Boom Swing - Left 27 in
O/A Track Width 78 in
Maximum Dump Clearance 150 in
Swing Bearing - Height 24 in
Maximum Reach 228 in
Number of Carrier Rollers 1
Track Roller Type Center Flange
Number of Track Rollers 4
Blade Up - Front 3417 lb
Blade Up - Side 2535 lb
Blade Down - Side 2844 lb
Blade Down - Front 5710 lb
Blade Down - Front 3042 lb
Blade Up - Side 1367 lb
Blade Up - Front 1808 lb
Blade Down - Side 1521 lb
Tip Over Protective Structure (TOPS) ISO 12117
Top Guard ISO 10262 (Level I)
Roll Over Protective Structure (ROPS) ISO 12117-2
Dynamic Operator Sound Pressure Level (ISO 6396:2008) 81 dB(A)
Note *European Union Directive “2000/14/EC”
Exterior Sound Power Level - ISO 6395:2008* 97 dB(A)
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.

The durable hoods and frame and the compact radius design of the 305.5E2 let you work comfortably and confidently in confined areas. The operator environment includes a high quality suspension seat, easy to adjust armrests and 100% pilot controls which offer consistent and long-lasting controllability.

High Definition Hydraulic System provides a load sensing and flow sharing capability leading to operational precision, efficient performance and greater controllability. Power on Demand provides optimal efficiency and performance the moment you need it. This automatic system ensures fuel efficiency through appropriate engine rating to meet all operational needs as required.

Broad range of Cat Work Tools make the Cat Mini Excavator a versatile machine able to meet the requirements of any job site. Over 200 degrees of bucket rotation provides greater material retention during truck loading and easier flat wall digging without having to reposition the machine.

Front shovel bucket orientation provides the operator with more ways to get the job done faster. COMPASS Control Panel is a standard feature that allows the operator to easily adjust auxiliary flows to achieve the optimal work tool performance, activate auto idle for improved fuel efficiency and utilize the security system to ensure protection of valuable assets with the simple touch of a button. The Site Reference System included in the COMPASS monitor provides output from pitch and roll sensors to aid in grading and level trenching. This impacts accuracy and productivity for job site finishing.

Convenient service and maintenance requirements include ease of access to daily check points, 500 hour engine oil and filter change period, 500 hour grease interval on front implement, S·O·SSM oil sampling valve and overall long term durability.

All Cat Mini Excavators from 3.5 metric tons to 8 metric tons are ROPS, TOPS and Top Guard Level 1 certified and include the Cat Interlock (hydraulic lockout) System, a certified accumulator which allows for auxiliary pressure to be released, making connecting and disconnecting work tools safer and easier, and a travel alarm. All of these safety features are standard on the E2 model lineup (travel alarm optional in Europe).