308 CR (Fixed Boom)

Mini Excavators 308 CR (Fixed Boom)

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Key Specs

Net Power
69.5 HP
51.8 kW
Operating Weight
17695 lb
8025 kg
Dig Depth
185 in
4687 mm

Overview

Mini Excavators Inspired by Our Customers

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.

Benefits

4 Industry First Features

Cat Exclusives in a Mini Excavator

Up to 10% Lower Total Ownership Costs

with improved fuel efficiency and longer service intervals

Up to 20% More Performance

with customizable operator settings and improvements in lift, swing, travel and multifunction

Product Specifications for 308 CR (Fixed Boom)

Net Power 69.5 HP 51.8 kW
Displacement 203 in³ 3.33 l
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC 69.5 HP 51.8 kW
Bore 3.7 in 94 mm
Stroke 4.7 in 120 mm
Engine Model - U.S. EPA Tier 4 Final/EU Stage V Cat® C3.3B Cat® C3.3B
Gross Power - SAE J1995:2014 74.3 HP 55.4 kW
Operating Weight 17695 lb 8025 kg
Minimum Operating Weight with Cab* 16163 lb 7330 kg
Maximum Operating Weight with Cab** 17695 lb 8025 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.
Steel Tracks with Pads 662 lb 300 kg
Long Stick 187 lb 85 kg
Counterweight 551 lb 250 kg
Ground Pressure - Maximum Weight 5.1 psi 35 kPa
Travel Speed - Low 1.8 mile/h 3 km/h
Travel Speed - High 3 mile/h 4.9 km/h
Maximum Traction Force - Low Speed 15962 lb 71 kN
Ground Pressure - Minimum Weight 4.7 psi 32.1 kPa
Maximum Traction Force - High Speed 6587 lb 29.3 kN
Gradeability - Maximum 30 degrees 30 degrees
Engine Oil 3 gal (US) 11.2 l
Cooling System 2.6 gal (US) 10 l
Hydraulic Tank 14 gal (US) 53 l
Hydraulic System 29 gal (US) 110 l
Fuel Tank 38 gal (US) 145 l
Digging Force - Stick - Long 8250 lb 36.7 kN
Operating Pressure - Swing 3626 psi 250 bar
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134 psi 285 bar
Type Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard 9285 lb 41.3 kN
Maximum Auxiliary Circuit - Primary - Pressure at Pump 4134 psi 285 bar
Maximum Auxiliary Circuit - Primary - Flow at Pump 35 gal/min 131 l/min
Operating Pressure - Equipment 4134 psi 285 bar
Pump Flow at 2,400 rpm 44 gal/min 167 l/min
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9 gal/min 33 l/min
Operating Pressure - Travel 4134 psi 285 bar
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.
Digging Force - Bucket 13241 lb 58.9 kN
Machine Swing Speed 10.6 r/min 10.6 r/min
Height 17 in 431 mm
Width - Standard 90.6 in 2300 mm
Width - Wide 96.5 in 2450 mm
Top Guard ISO 10262:1998 (Level I) ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS) ISO 12117:1997 ISO 12117:1997
Roll Over Protective Structure (ROPS) ISO 12117-2:2008 ISO 12117-2:2008
Average Exterior Sound Pressure (ISO 6395:2008) 99 dB(A) 99 dB(A)
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"
Swing Bearing - Height 30 in 756 mm
Height - Boom Working - With Tools** 105 in 2671 mm
Ground Clearance 14 in 350 mm
Boom In Reach 66 in 1681 mm
O/A Track Width 91 in 2300 mm
Height - Boom Transport - No Tools* 97 in 2466 mm
Maximum Dig Height 291 in 7392 mm
Note (2) **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.
Maximum Reach 252 in 6391 mm
Tail Swing with Counterweight 56 in 1425 mm
Maximum Blade Height 14.6 in 370 mm
Vertical Wall 142 in 3600 mm
Dig Depth 163 in 4145 mm
Overall Shipping Length - with Counterweight 228 in 5780 mm
Note (1) *Boom Height when stick is pinned in transport position with no attachments. *Boom Height when stick is pinned in transport position with no attachments.
Maximum Blade Depth 16 in 407 mm
Tail Swing without Counterweight 51 in 1290 mm
Overall Shipping Length - without Counterweight 222 in 5645 mm
Cab Height 100 in 2541 mm
Maximum Reach - Ground Level 246 in 6246 mm
Maximum Dump Clearance 207 in 5255 mm
Track Belt/Shoe Width 18 in 450 mm
Stick Length 66 in 1665 mm
O/A Undercarriage Length 113 in 2880 mm
Dig Depth 185 in 4687 mm
Stick Length 87 in 2208 mm
O/A Track Width 91 in 2300 mm
Maximum Blade Depth 16 in 407 mm
O/A Undercarriage Length 113 in 2880 mm
Overall Shipping Length - without Counterweight 5665 mm (223 in)*** 5665 mm (223 in)***
Maximum Blade Height 14.6 in 370 mm
Cab Height 100 in 2541 mm
Maximum Dump Clearance 223 in 5672 mm
Height - Boom Transport - No Tools* 100 in 2540 mm
Overall Shipping Length - with Counterweight 5800 mm (228 in)*** 5800 mm (228 in)***
Ground Clearance 14 in 350 mm
Boom In Reach 89 in 2250 mm
Tail Swing with Counterweight 56 in 1425 mm
Maximum Dig Height 307 in 7809 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.
Maximum Reach 272 in 6900 mm
Height - Boom Working - With Tools** 121 in 3080 mm
Swing Bearing - Height 30 in 756 mm
Vertical Wall 162 in 4110 mm
Maximum Reach - Ground Level 266 in 6766 mm
Note (2) ***With blade positioned at the rear of the machine. ***With blade positioned at the rear of the machine.
Track Belt/Shoe Width 18 in 450 mm
Tail Swing without Counterweight 51 in 1290 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.
Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1 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 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.
Recyclability 96% 96%

308 CR (Fixed Boom) Standard Equipment

ENGINE

  • Cat C3.3 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 ( –37° F)
  • Ecology Drain

HYDRAULICS

  • Smart Tech Electronic Pump
  • 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 (3700 mm/145.7 in)
  • Standard Stick (1665 mm/65.6 in)
  • Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler (not available in all regions)
  • Boom Lowering Check Valve
  • Stick Lowering Check Valve

ELECTRICAL

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

OTHER

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

308 CR (Fixed Boom) 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 (2208 mm/92.9 in)
  • Attachments including Buckets, Augers and Hammers
  • 2nd Auxiliary Hydraulic Lines
  • Bucket Linkage with Lift 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

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