305E2 CR

The Cat® 305E2 CR Mini Hydraulic Excavator delivers high performance, durability and versatility in a compact design to help you work in a variety of applications.

Engine Model Cat® C2.4
Net Power 40.2 HP
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 40.2 HP

Operating Weight 11443 lb
Weight - Canopy, Standard Stick 10970 lb

Bore 3.4 in
Displacement 146 in³
Stroke 4 in

Travel System
Maximum Traction Force - High Speed 5418 lb
Maximum Traction Force - Low Speed 10161 lb
Travel Speed - High 2.7 mile/h
Travel Speed - Low 1.7 mile/h

Hydraulic System
Auxiliary Circuit - Primary (186 bar/2,734 psi) 21.1 gal/min
Auxiliary Circuit - Secondary (174 bar/2,524 psi) 6.6 gal/min
Digging Force - Stick - Long 4788 lb
Digging Force - Stick - Standard 5550 lb
Operating Pressure - Equipment 3553 psi
Operating Pressure - Swing 3132 psi
Operating Pressure - Travel 3553 psi
Pump Flow at 2,400 rpm 39.6 gal/min

Swing System
Machine Swing Speed 10 r/min
Boom Swing - Left - With Stop* 60°
Boom Swing - Left - Without Stop* 80°
Boom Swing - Right 50°

Width 78 in
Height 14.8 in
Dig Depth 21.9 in
Lift Height 15.9 in

Service Refill Capacities
Cooling System 2.8 gal (US)
Engine Oil 2.5 gal (US)
Hydraulic Tank 18 gal (US)
Fuel Tank 16.6 gal (US)
Hydraulic System 20.6 gal (US)

Air Conditioning System
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.

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
Roll Over Protective Structure (ROPS) ISO 12117-2
Tip Over Protective Structure (TOPS) ISO 12117
Top Guard ISO 10262 (Level I)

Dimensions - Long Stick
Boom Height - Shipping Position 85 in
Boom In Reach 100 in
Boom Swing - Left 27 in
Boom Swing - Right 31 in
Dig Depth 144 in
Maximum Blade Depth 22 in
Maximum Blade Height 16 in
Maximum Dig Height 214 in
Maximum Dump Clearance 154 in
Maximum Reach 235 in
Maximum Reach - Ground Level 229 in
O/A Shipping Height 100 in
O/A Shipping Length 208 in
O/A Track Width 78 in
O/A Undercarriage Length 102 in
Swing Bearing - Height 24 in
Tail Swing 43 in
Track Belt/Shoe Width 16 in
Vertical Wall 104 in

Dimensions - Standard Stick
Boom Height - Shipping Position 69 in
Boom In Reach 93 in
Boom Swing - Left 27 in
Boom Swing - Right 31 in
Dig Depth 129 in
Maximum Blade Depth 22 in
Maximum Blade Height 16 in
Maximum Dig Height 207 in
Maximum Dump Clearance 129 in
Maximum Reach 220 in
Maximum Reach - Ground Level 210 in
O/A Shipping Height 100 in
O/A Shipping Length 204 in
O/A Track Width 78 in
O/A Undercarriage Length 102 in
Swing Bearing - Height 24 in
Tail Swing 43 in
Track Belt/Shoe Width 16 in
Vertical Wall 91 in

Emissions Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
Gross Power - ISO 14396 41.8 HP

Hydraulic System
Digging Force - Bucket 10050 lb
Type Load Sensing Hydraulics with Variable Displacement Piston Pump

Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (9'8”)
Blade Down - Front 5159 lb
Blade Down - Side 2646 in
Blade Up - Front 3197 lb
Blade Up - Side 2359 in

Lift Capacities at Ground Level - Lift Point Radius: 4000 mm (13'1”)
Blade Down - Front 2778 lb
Blade Down - Side 1411 lb
Blade Up - Front 1676 lb
Blade Up - Side 1257 lb

Operating Specifications
Stick Length - Long 67 in
Stick Length - Standard 52 in

Swing System
Note *Automatic swing brake, spring applied, hydraulic release.

Travel System
Gradeability - Maximum 30°
Ground Pressure - Cab 4.4 psi
Ground Pressure - Canopy 4.3 psi

Number of Carrier Rollers 1
Number of Track Rollers 4
Track Roller Type Center Flange

Note *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Weight - Cab, Long Stick 11443 lb
Weight - Cab, Standard Stick 11334 lb
Weight - Canopy, Long Stick 11069 lb


The durable hoods and frame and the compact radius design of the 305E2 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).

Standard Equipment

  • Cat C2.4 diesel engine (meets U.S. EPA Tier 4 Final emission standards for North America and EU Stage IIIA/Tier 4 Interim emission standards for all other regions)
  • Automatic engine idle
  • Automatic engine shut-off
  • Automatic two speed travel
  • Diesel Particulate Filter (North America only)
  • Diesel Oxidation Catalyst (North America only)
  • Fuel and water separator
  • Power on demand
  • 1-way and 2-way (combined function)
  • Accumulator
  • Automatic swing parking brake
  • Auxiliary hydraulic lines
  • Adjustable auxiliary relief
  • Auxiliary line quick disconnects
  • Cat interlock system: hydraulic lockout
  • Continuous auxiliary flow
  • Ecology drain
  • Hydraulic oil cooler
  • High definition hydraulics
  • Load sensing/flow sharing
  • 100% pilot control ergonomic joysticks
  • Adjustable armrests
  • COMPASS: complete, operation, maintenance, performance and security system
    • Multiple languages
  • Cup holder
  • Hydraulic neutral lockout bar
  • Literature holder
  • Pattern changer (optional in Europe)
  • Site reference system: leveling
  • Tool storage area
  • Travel control pedals with hand levers
  • Washable floor mat
  • Dozer blade with float function
  • Track, rubber belt, 400 mm (16 in) width
  • Tie down eyes on track frame
  • Towing eye on base frame
  • 200 degree bucket rotation
  • Certified lifting eye on bucket linkage (optional in Europe)
  • Front shovel capable
  • Thumb ready stick
  • 12 volt electrical system
  • 60 ampere alternator
  • 650 CCA maintenance free battery
  • Fuse box
  • Ignition key start/stop switch
  • Slow blow fuse
  • Warning horn
  • Boom light with time delay capability
  • Anti-theft system (COMPASS)
  • Caterpillar Corporate “One Key” System
  • Door locks
  • Lockable fuel cap
  • Retractable seat belt
  • Roll Over Protective Structure (ROPS) (ISO 12117-2)
  • Tip Over Protective Structure (TOPS) (ISO 12117)
  • Top guard – ISO 10262 (Level 1)
  • Travel alarm (optional in Europe)
  • Product Link™

Optional Equipment

  • Engine block heater
  • Quick coupler lines
  • Boom lowering check valve
  • Stick lowering check valve
  • Secondary auxiliary hydraulic lines
  • Cab:
    • Air conditioning
    • Heat
    • High back suspension seat
    • Interior light
    • Interlocking front window system
    • Radio
    • Windshield wiper
  • Power angle blade
  • Track, double grouser (steel), 400 mm (16 in)
  • Track, double grouser (steel) with rubber pad, 400 mm (16 in)
  • Quick coupler: manual or hydraulic
  • Thumb
  • Buckets
  • Full range of performance matched work tools
    • Auger, hammer, ripper
  • Light, cab with time delay capability
  • Mirror, canopy right
  • Mirror, canopy left
  • Mirror, cab rear
  • Battery disconnect
  • Beacon socket
  • Front wire mesh guard
  • Rearview camera
  • Vandal guard