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The Cat® 307E2 Mini Hydraulic Excavator delivers high performance, durability and versatility in a standard tail swing design to help you work in a variety of applications.


  • Engine Model Cat® C2.4 Turbo Cat® C2.4 Turbo
  • Net Power 50.6 HP 37.7 kW
  • Bore 3.4 in 87.0 mm
  • Displacement 146.5 in³ 2.4 l
  • Gross Power - ISO 14396 53.1 HP 39.6 kW
  • Note Meets U.S. EPA Tier 4 Final and EU Stage IIIB emission standards. Meets U.S. EPA Tier 4 Final and EU Stage IIIB emission standards.
  • Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 50.6 HP 37.7 kW
  • Stroke 4.0 in 102.4 mm


  • Operating Weight 16028.0 lb 7270.0 kg
  • Operating Weight - With Cab 16028.0 lb 7270.0 kg
  • Note (1) Weight with steel tracks with rubber pads, bucket, operator (75 kg/165 lb), full fuel and auxiliary lines. Weight with steel tracks with rubber pads, bucket, operator (75 kg/165 lb), full fuel and auxiliary lines.
  • Note (2) Weight varies depending on machine configuration. Weight varies depending on machine configuration.

Travel System

  • Ground Pressure 4.92 psi 33.9 kPa
  • Gradeability - Maximum 20° 20°
  • Maximum Traction Force - High Speed 7599.0 lbf 33.8 kN
  • Maximum Traction Force - Low Speed 13331.0 lbf 59.3 kN
  • Travel Speed - High 3.17 mile/h 5.1 km/h
  • Travel Speed - Low 1.99 mile/h 3.2 km/h
  • Note (1) Each track is driven by one independent 2-speed motor. Each track is driven by one independent 2-speed motor.
  • Note (2) Drive modules are integrated into the roller frame for total protection. Drive modules are integrated into the roller frame for total protection.
  • Note (3) Straight line travel when tracking and operating the front linkage simultaneously. Straight line travel when tracking and operating the front linkage simultaneously.

Hydraulic System

  • Auxiliary Circuit - Primary (280 bar/4,061 psi) 33.8 gal/min 128.0 l/min
  • Auxiliary Circuit - Secondary (280 bar/4,061 psi) 8.7 gal/min 33.0 l/min
  • Digging Force - Bucket 11375.0 lbf 50.6 kN
  • Digging Force - Stick - Standard 8340.0 lbf 37.1 kN
  • Note Load sensing hydraulics with variable displacement piston pump. Load sensing hydraulics with variable displacement piston pump.
  • Operating Pressure - Equipment 4061.0 psi 28000.0 kPa
  • Operating Pressure - Swing 4061.0 psi 28000.0 kPa
  • Operating Pressure - Travel 4061.0 psi 28000.0 kPa
  • Pump Flow at 2,400 rpm 40.9 gal/min 154.0 l/min

Swing System

  • Machine Swing Speed 10.2 r/min 10.2 r/min
  • Note Automatic swing break, spring applied, hydraulic release. Automatic swing break, spring applied, hydraulic release.


  • Width 90.6 in 2300.0 mm
  • Height 17.5 in 445.0 mm
  • Dig Depth 15.3 in 390.0 mm
  • Lift Height 13.8 in 350.0 mm

Service Refill Capacities

  • Cooling System 3.7 gal (US) 14.0 l
  • Engine Oil 2.9 gal (US) 11.0 l
  • Hydraulic Tank 13.5 gal (US) 51.0 l
  • Fuel Tank 35.7 gal (US) 135.0 l
  • Hydraulic System 20.6 gal (US) 78.0 l

Operating Specifications

  • Machine Overhang 1.2 ft 358.0 mm
  • Stick Length - Standard 5.5 ft 1670.0 mm


  • Average Exterior Sound Pressure 98 dB(A) ISO 6395 – Dynamic Test 98 dB(A) ISO 6395 – Dynamic Test

Dimensions - Standard Stick

  • Boom Height - Shipping Position 8.6 ft 2630.0 mm
  • Boom In Reach 5.5 ft 1690.0 mm
  • Dig Depth 13.4 ft 4070.0 mm
  • Maximum Blade Depth 1.1 ft 350.0 mm
  • Maximum Blade Height 1.3 ft 390.0 mm
  • Maximum Dig Height 23.8 ft 7240.0 mm
  • Maximum Dump Clearance 17.0 ft 5190.0 mm
  • Maximum Reach 20.7 ft 6300.0 mm
  • Maximum Reach - Ground Level 20.2 ft 6160.0 mm
  • O/A Shipping Height 8.6 ft 2630.0 mm
  • O/A Shipping Length 19.9 ft 6080.0 mm
  • O/A Track Width 7.2 ft 2200.0 mm
  • O/A Undercarriage Length 9.0 ft 2760.0 mm
  • Swing Bearing - Height 2.5 ft 775.0 mm
  • Tail Swing - Standard Counterweight 5.7 ft 1750.0 mm
  • Track Belt/Shoe Width 1.5 ft 450.0 mm
  • Vertical Wall 11.9 ft 3630.0 mm


  • Number of Carrier Rollers 1 per side 1 per side
  • Number of Track Rollers 5 per side 5 per side
  • Track Roller Type Center flange Center flange


The standard tail swing design incorporates a counterweight that extends further back on the machine for greater stability. The standard tail swing paired with a fixed boom on the 307E2 provides superior reach and lift. 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. 180 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. Rearview camera improves operator productivity and efficiency through increased visibility, making work easier to complete.


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 II 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).

307E2 Standard Equipment


  • Cat C2.4 diesel engine (meets U.S. EPA Tier 4 Final/EU Stage IIIB emission standards)
  • 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
  • Boom lowering check valve (available only in Europe)
  • Cat interlock system: hydraulic lockout
  • Continuous auxiliary flow
  • Ecology drain
  • Hydraulic oil cooler
  • High definition hydraulics
  • Load sensing/flow sharing
  • Quick coupler lines
  • Secondary auxiliary hydraulic lines
  • Stick lowering check valve (available only in Europe)


  • 100% pilot control ergonomic joysticks
  • Adjustable armrests
  • Air conditioning/heat
  • COMPASS: complete, operation, maintenance, performance and security system
    • Multiple languages
  • Cup holder
  • High back suspension seat, heated
  • Hydraulic neutral lockout bar
  • Interior light
  • Literature holder
  • Pattern changer (optional in Europe)
  • Radio (optional in Europe)
  • Site reference system: leveling
  • Tool storage area
  • Travel control pedals with hand levers
  • Washable floor mat
  • Windshield wiper


  • Dozer blade with float function
  • Tie down eyes on track frame
  • Towing eye on base frame


  • 180 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


  • Cab and boom light with time delay capability
  • Mirror, rear view, cab left


  • Anti-theft system (COMPASS)
  • Battery disconnect
  • Caterpillar Corporate “One Key” System
  • Door locks
  • Lockable fuel cap
  • Rearview camera
  • Retractable seat belt
  • Roll Over Protective Structure (ROPS) (ISO 12117-2)
  • Tip Over Protective Structure (TOPS) (ISO 12117)
  • Top guard – ISO 10262 (Level II)
  • Travel alarm (optional in Europe)

307E2 Optional Equipment


  • Engine block heater


  • Track, triple grouser (steel), 450 mm (18 in)
  • Track, triple grouser (steel) with rubber pad, 450 mm (18 in)


  • Quick coupler: manual or hydraulic
  • Thumb
  • Buckets
  • Full range of performance matched work tools
    • Auger, hammer, shear, ripper


  • Mirror, cab rear


  • Front wire mesh guard
  • Front steel plate guard
  • Rain guard


  • Product Link™

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