308 CR

308 CR Mini Hydraulic Excavator

The 308 CR Mini Excavator delivers power and performance in an 8 ton size class to help you work in a wide range of applications.

308 CR Mini Hydraulic Excavator

DESCRIPTION

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.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.

ALL DAY COMFORT

  • A sealed and pressurized cab is equipped with an improved air conditioning system, adjustable wrist rests and a suspension seat to help keep you working comfortably all day long.

308 CR Mini Excavator
308 CR Mini Excavator

EASY TO OPERATE

  • Controls are easy to use and the intuitive Next Generation Monitor provides customizable machine operator preferences and easy to read machine information.

STICK STEER TRAVEL MODE

  • Moving around the job site is even easier with Cat Stick Steer. Easily switch from traditional travel controls with levers and pedals to joystick controls with a push of a button. The benefit of less effort and improved control is in your hands!

308 CR Mini Excavator
308 CR Mini Excavator

BIG PERFORMANCE IN A MINI DESIGN

  • Increased lifting, swinging, travel and multi-functioning performance help you get the job done more efficiently, and blade float allows for easy clean up.

SAFETY ON THE JOB SITE

  • Your safety is our top priority. The Cat Mini Excavator is designed to help keep you safe on the job. A back-up camera, courtesy work lights and a fluorescent retractable seat belt are just a few of the safety features we‚Äôve built into the machine.

308 CR Mini Excavator
308 CR Mini Excavator

SIMPLE SERVICE FOR LESS DOWNTIME

  • Maintenance is quick and easy on the Cat Mini Excavator. Routine check points are easy to access at ground level with grouped service points and robust service panels.

LOWER OPERATING COSTS

  • Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat Mini Excavator was designed with reducing your operating costs in mind.

308 CR Mini Excavator

UNMATCHED DEALER SUPPORT

  • Your Cat dealer is here to help you reach your business goals. From providing equipment solutions to operator training to service needs and beyond, your Cat dealer is ready to help.

SUSTAINABILITY

  • The Cat® C3.3B engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
  • Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to: 20% biodiesel FAME (fatty acid methyl ester) * or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
  • Auto Idle helps reduce unnecessary fuel burn and greenhouse gas emissions by allowing the engine to automatically go into idle mode when the machine is not working.
  • Engine Idle Shutdown Timer reduces fuel burn, greenhouse gas emissions and unnecessary idle time by shutting down the machine after a pre-set idling period.
  • Cruise control helps you maintain a constant speed as you travel across your jobsite saving fuel and reducing greenhouse gas emissions.
  • The Cat® Seat Belt Reminder provides audible and visual warnings to remind operators to buckle up during machine operation. The easy-to-install system is compatible with all equipment brands to help ensure operator safety.
  • Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
  • Remote Flash minimizes downtime and maintenance time while keeping your asset running with maximum efficiency. Alerts for machine updates are sent virtually from your Cat dealer and updates can be deployed without a dealer technician needing to be onsite.(if equipped)
  • Remote Troubleshoot decreases maintenance time and keeps your machine running with maximum efficiency by allowing your Cat dealer to virtually test the machine while working. Once a problem is identified, a technician can fix it the first time, saving time and money.(if equipped)
  • Cat Grade with advanced 2D and 3D technologies combine advanced guidance with optional automated machine control helping you reach grading targets while reducing fuel burn and greenhouse gas emissions by improving efficiency, job site productivity, and accuracy. (if equipped).
*Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel. (for use of blends higher than 20% biodiesel, consult your Cat dealer)

308 CR Mini Excavator
  • Standard Equipment
  • Optional Equipment
  • Specs
  • Docs

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)

Specs

Overview

Long Name:
308 CR Mini Hydraulic Excavator
Name:
308 CR
Brand:
Caterpillar
Status:
Current

Engine

Net Power
69.5 HP / 51.8 kW
Engine Model
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

Weights

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.
Note (2)
**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

Weight Increase from Minimum Configuration

Steel Tracks with Pads
752 lb / 341 kg
Counterweight
552 lb / 250 kg
Long Stick
146 lb / 66 kg

Travel System

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

Service Refill Capacities

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

Hydraulic System

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
Note
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

Swing System

Machine Swing Speed
10.6 r/min / 10.6 r/min
Boom Swing - Right
50 degrees

Blade

Height
17 in / 431 mm
Width - Standard
90.6 in / 2300 mm
Width - Wide
96.5 in / 2450 mm

Certification - Cab

Top Guard
ISO 10262:1998 (Level I)
Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Tip Over Protective Structure (TOPS)
ISO 12117:1997

Sound

Operator Sound Pressure (ISO 6396:2008)
72 dB(A) / 72 dB(A)
Note
European Union Directive "2000/14/EC"
Average Exterior Sound Pressure (ISO 6395:2008)
99 dB(A) / 99 dB(A)

Dimensions - Standard Stick

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.
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.
Overall Shipping Length - without Counterweight
258.8 in / 6574 mm
Note (2)
***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

Dimensions - Long Stick

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.
Note (2)
***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.
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)***
Overall Shipping Length - with Counterweight
6872 mm (270.6 in)***

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 1.430 metric tonnes.

Swing System

Boom Swing - Left
60 degrees

Sustainability

Recyclability
96%