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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 Less
Net Power 50.6 HP 37.7 kW Less
Displacement 146.5 in³ 2.4 l Less
Stroke 4.0 in 102.4 mm Less
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 50.6 HP 37.7 kW Less
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. Less
Gross Power - ISO 14396 53.1 HP 39.6 kW Less
Bore 3.4 in 87.0 mm Less


Operating Weight 16028.0 lb 7270.0 kg Less
Operating Weight - With Cab 16028.0 lb 7270.0 kg Less
Note (2) Weight varies depending on machine configuration. Weight varies depending on machine configuration. Less
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. Less

Travel System

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

Hydraulic System

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

Swing System

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


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

Service Refill Capacities

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

Operating Specifications

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


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

Dimensions - Standard Stick

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


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


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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