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Caterpillar

308 CR Mini Hydraulic Excavator

Net Power

69.5 HP

51.8 kW

Operating Weight

20077 lb

9105 kg

Dig Depth

182.8 in

4643 mm

Overview

The Cat® 308 CR Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications.

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Exterior

Model shown represents features on all Cat® Mini Excavators except where indicated.

Interior

Model shown represents features on all Cat® Mini Excavators except where indicated.

Features

Details

Specifications

Spec Value
Net Power 69.5 HP 51.8 kW
Engine Model Cat C3.3B Cat C3.3B
Stroke 4.7 in 120 mm
Bore 3.7 in 94 mm
Gross Power – SAE J1995 74.3 HP 55.4 kW
Displacement 203 in³ 3.33 l
Rated Net Power – 2,200 rpm – U.S. EPA Tier 4 Final/EU Stage V – ISO 9249/EEC 80/1269 69.5 HP 51.8 kW
Spec Value
Operating Weight 20077 lb 9105 kg
Note (1) *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket. *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket.
Note (2) **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket. **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.
Maximum Operating Weight with Cab** 20077 lb 9105 kg
Minimum Operating Weight with Cab* 18610 lb 8440 kg
Spec Value
Steel Tracks with Pads 752 lb 341 kg
Counterweight 552 lb 250 kg
Long Stick 146 lb 66 kg
Spec Value
Maximum Traction Force – High Speed 6250 lb 27.8 kN
Ground Pressure – Maximum Weight 5.8 psi 39.8 kPa
Ground Pressure – Minimum Weight 5.4 psi 36.9 kPa
Travel Speed – High 3.2 mile/h 5.1 km/h
Travel Speed – Low 1.9 mile/h 3.1 km/h
Maximum Traction Force – Low Speed 15175 lb 67.5 kN
Gradeability – Maximum 30 degrees 30 degrees
Spec Value
Fuel Tank 39 gal (US) 147 l
Hydraulic System 29 gal (US) 110 l
Hydraulic Tank 14 gal (US) 53 l
Cooling System 2.6 gal (US) 10 l
Engine Oil 3 gal (US) 11.2 l
Spec Value
Digging Force – Bucket 13946 lb 62 kN
Operating Pressure – Travel 4134 psi 285 bar
Operating Pressure – Swing 3626 psi 250 bar
Operating Pressure – Equipment 4134 psi 285 bar
Digging Force – Stick – Long 8032 lb 35.7 kN
Type Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down. Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Pump Flow at 2,400 rpm 44 gal/min 167 l/min
Digging Force – Stick – Standard 9509 lb 42.3 kN
Maximum Auxiliary Circuit – Primary – Pressure at Pump 4134 psi 285 bar
Maximum Auxiliary Circuit – Secondary – Pressure at Pump 4134 psi 285 bar
Maximum Auxiliary Circuit – Primary – Flow at Pump 35 gal/min 131 l/min
Maximum Auxiliary Circuit – Secondary – Flow at Pump 9 gal/min 33 l/min
Spec Value
Machine Swing Speed 10.6 r/min 10.6 r/min
Boom Swing – Right 50 degrees 50 degrees
Boom Swing – Left 60 degrees 60 degrees
Spec Value
Height 17 in 431 mm
Width – Standard 90.6 in 2300 mm
Width – Wide 96.5 in 2450 mm
Spec Value
Top Guard ISO 10262:1998 (Level I) ISO 10262:1998 (Level I)
Roll Over Protective Structure (ROPS) ISO 12117-2:2008 ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997 ISO 12117:1997
Spec Value
Operator Sound Pressure (ISO 6396:2008) 72 dB(A) 72 dB(A)
Note European Union Directive "2000/14/EC" European Union Directive "2000/14/EC"
Average Exterior Sound Pressure (ISO 6395:2008) 99 dB(A) 99 dB(A)
Spec Value
Cab Height 100 in 2541 mm
Vertical Wall 117.8 in 2991 mm
Boom In Reach 120.4 in 3059 mm
Tail Swing with Counterweight 62.4 in 1585 mm
Boom Swing – Right 36.8 in 935 mm
Track Belt/Shoe Width 17.7 in 450 mm
Maximum Reach 281.1 in 7141 mm
Stick Length 71.7 in 1820 mm
Maximum Blade Height 14.6 in 370 mm
Boom Swing – Left 23.8 in 604 mm
Maximum Blade Depth 16 in 407 mm
O/A Track Width 90.6 in 2300 mm
Maximum Dig Height 265.2 in 6736 mm
Maximum Dump Clearance 187.4 in 4760 mm
Maximum Reach – Ground Level 273.6 in 6949 mm
Tail Swing without Counterweight 57.1 in 1450 mm
O/A Undercarriage Length 113.4 in 2880 mm
Swing Bearing – Height 29.7 in 756 mm
Ground Clearance 13.8 in 350 mm
Dig Depth 161.7 in 4108 mm
Note *Boom Height when stick is pinned in transport position with no attachments. *Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length – with Counterweight 264 in 6706 mm
Note (1) **Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position. **Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Overall Shipping Length – without Counterweight 258.8 in 6574 mm
Note (2) ***With blade positioned at the rear of the machine. ***With blade positioned at the rear of the machine.
Height – Boom Working – With Tools** 104.7 in 2660 mm
Height – Boom Transport – No Tools* 95.7 in 2430 mm
Spec Value
Dig Depth 182.8 in 4643 mm
Boom Swing – Left 23.8 in 604 mm
Maximum Dig Height 277.1 in 7039 mm
Maximum Blade Height 14.6 in 370 mm
Track Belt/Shoe Width 17.7 in 450 mm
Cab Height 100 in 2541 mm
Tail Swing with Counterweight 62.4 in 1585 mm
O/A Undercarriage Length 113.4 in 2880 mm
Maximum Dump Clearance 199.7 in 5072 mm
Boom Swing – Right 36.8 in 935 mm
Maximum Blade Depth 16 in 407 mm
Ground Clearance 13.8 in 350 mm
Stick Length 92.8 in 2358 mm
Maximum Reach 300.7 in 7637 mm
Maximum Reach – Ground Level 293.7 in 7460 mm
Boom In Reach 126.6 in 3215 mm
Swing Bearing – Height 29.7 in 756 mm
O/A Track Width 90.6 in 2300 mm
Tail Swing without Counterweight 57.1 in 1450 mm
Vertical Wall 134 in 3404 mm
Note *Boom Height when stick is pinned in transport position with no attachments. *Boom Height when stick is pinned in transport position with no attachments.
Note (2) ***With blade positioned at the rear of the machine. ***With blade positioned at the rear of the machine.
Note (1) **Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position. **Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Height – Boom Transport – No Tools* 89 in 2260 mm
Height – Boom Working – With Tools** 120.1 in 3050 mm
Overall Shipping Length – without Counterweight 6872 mm (270.6 in)*** 6872 mm (270.6 in)***
Overall Shipping Length – with Counterweight 6872 mm (270.6 in)*** 6872 mm (270.6 in)***
Spec Value
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 1.430 metric tonnes. 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 1.430 metric tonnes.

Standard Equipment

ENGINE

  • Cat C3.3B Diesel Engine (U.S. EPA Tier 4 Final/EU Stage V) – Electronic Engine, Turbo, Diesel Particulate Filter (DPF)
  • Automatic Engine Idle
  • Automatic Engine Shutdown
  • Automatic Swing Brake
  • Automatic Two Speed Travel
  • Fuel Water Separator with Indicator
  • Radial Seal – Double Element Air Filter
  • Extended Life Coolant, –37° C (–35° F)

HYDRAULICS

  • Electronic Variable Displacement Piston Pump
  • Load Sensing/Flow Sharing Hydraulics
  • Power On Demand
  • Hydraulic Temperature Monitoring
  • Certified Accumulator
  • HYDO Advanced Hydraulic Oil

OPERATOR ENVIRONMENT

  • Top Guard ISO 10262 1998 Level I
  • ROPS ISO 12117-2:2008
  • Stick Steer Mode
  • Travel Cruise Control
  • Control Pattern Changer
  • Adjustable Wrist Rests
  • Molded Footrests
  • Removable, Washable Floor Mat
  • Travel Pedals and Hand Levers
  • Cat Key with Passcode Option
  • HVAC with Automatic Temperature Control
  • Hydraulic Lockout Controls
  • Integrated Lower Front Window
  • Assisted Front Window Overhead Storage
  • Rear Window Emergency Exit
  • Fabric, High Back, Suspension Seat
  • Retractable Seat Belt (75 mm/3 in)
  • Coat Hook
  • Cup Holder
  • LED Interior Light
  • Literature Holder
  • Mounting Bosses for Top and Front Guards
  • 12V Power Socket
  • Radio – Bluetooth, Auxiliary, Microphone, USB (charging only)
  • Skylight
  • Signaling/Warning Horn
  • Cab and (left side) Boom Work Lights
  • Utility Space for Mobile Phone
  • Next Generation Color LCD Monitor (IP66)
    – Jog Dial Interface
    – Fuel Level and Coolant Temperature Gauges
    – Maintenance and Machine Monitoring
    – Performance and Machine Adjustments
    – Numeric Security Code
    – Multiple Languages
    – Camera Ready (IP68 & IP69K)
    – Hour Meter with Wake Up Switch

UNDERCARRIAGE

  • Greased and Lubricated Track
  • Tie Down Eyes on Track Frame
  • Dozer Blade
  • Dozer Float
  • Bolt-on, Reversible Wear Edge

BOOM, STICK AND LINKAGES

  • One Piece Boom (3400 mm/133.9 in)
  • Standard Stick (1820 mm/71.7 in)
  • Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler (not available in all regions)
  • Thumb Ready (not available in all regions)

ELECTRICAL

  • 12 Volt Electrical System
  • 60 Ampere Alternator
  • Circuit Breaker
  • 900 CCA Maintenance Free Battery
  • Battery Disconnect
  • Ignition Key Stop Switch

OTHER

  • Locks on External Enclosure Doors
  • Lockable Fuel Cap
  • Beacon Socket
  • Rear Reflectors

Optional Equipment

OPERATOR ENVIRONMENT

  • Push to Start with Bluetooth® Key
  • Air Suspension Heated Seat
  • Rain Visor
  • Next Generation Advanced Monitor (below are all included with Next Generation Advanced Monitor option)
    – Touch Screen
    – Site Reference System
    – High Definition Camera Capable (IP68 & IP69K)
    – Numeric Security Code

UNDERCARRIAGE

  • Wide Dozer Blade
  • Steel Tracks (450 mm/17.7 in wide)
  • Wide Steel Tracks (600 mm/23.6 in)
  • Steel Track with Rubber Pads
  • Track Guides

BOOM, STICK AND LINKAGES

  • Long Stick (2360 mm/92.9 in)
  • Attachments including Buckets, Augers and Hammers
  • 2nd Auxiliary Hydraulic Lines
  • Boom Lowering Check Valve
  • Stick Lowering Check Valve
  • Certified Lifting Eye

ELECTRICAL

  • Product Link™ Elite (regulations apply)
  • Travel Alarm
  • Rearview Camera
  • Rotating Beacon

GUARDING

  • Mesh Front Guard ISO 10262 1998 Level I
  • Heavy Duty Front Guard ISO 10262 1998 Level II
  • Overhead Cab Guard ISO 10262 1998 Level II
  • Polycarbonate Front Window EN356 P5A
  • Track Guards

OTHER

  • Additional Counterweight
  • Water Jacket Heater
  • Refueling Pump
  • Variable Angle Boom (refer to 308 CR VAB brochure for VAB specs and additional information)
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