308 CR Mini Excavator

308 CR Mini Hydraulic Excavator

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.

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.
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 the Cat Stick Steer option. 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!
BIG PERFORMANCE IN A MINI DESIGN
  • Increased lifting, swinging, travel and multi-functioning performance helps you get the job done more efficiently, and dig-to-blade 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’ve built into the machine.
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.
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.
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 the Cat Stick Steer option. 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!
BIG PERFORMANCE IN A MINI DESIGN
  • Increased lifting, swinging, travel and multi-functioning performance helps you get the job done more efficiently, and dig-to-blade 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’ve built into the machine.
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.

Dimensions - Long Stick

Tail Swing without Counterweight
57in
O/A Track Width
91in
Swing Bearing - Height
30in
Boom In Reach
127in
O/A Shipping Length
262in
Maximum Reach - Ground Level
294in
Maximum Blade Depth
16in
Boom Swing - Right
37in
Transport Height
99in
O/A Undercarriage Length
113in
Maximum Dump Clearance
200in
Tail Swing with Counterweight
65in
Cab Height
100in
Track Belt/Shoe Width
18in
Maximum Blade Height
15in
Maximum Dig Height
277in
Boom Swing - Left
24in
Dig Depth
183in
Vertical Wall
134in
Maximum Reach
301in
Stick Length
93in
Ground Clearance
14in

Sound

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

Dimensions - Standard Stick

Swing Bearing - Height
30in
O/A Undercarriage Length
113in
Tail Swing without Counterweight
57in
Maximum Dig Height
265in
Maximum Dump Clearance
187in
Maximum Reach - Ground Level
274in
Transport Height
98in
Stick Length
72in
Maximum Reach
281in
Track Belt/Shoe Width
18in
Boom Swing - Right
37in
Tail Swing with Counterweight
65in
Boom In Reach
120in
Vertical Wall
118in
Cab Height
100in
O/A Shipping Length
259in
Dig Depth
162in
Ground Clearance
14in
O/A Track Width
91in
Maximum Blade Depth
16in
Boom Swing - Left
24in
Maximum Blade Height
15in

Travel System

Maximum Traction Force - Low Speed
15175lb
Travel Speed - Low
1.9mile/h
Ground Pressure - Minimum Weight
5.4psi
Travel Speed - High
3.2mile/h
Maximum Traction Force - High Speed
6250lb
Gradeability - Maximum
30 degrees
Ground Pressure - Maximum Weight
5.8psi

Weights

Minimum Operating Weight with Cab*
18610lb
Note (1)
*Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket.
Operating Weight
20678lb
Maximum Operating Weight with Cab**
20077lb
Note (2)
**Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.

Engine

Gross Power - ISO 14396
74.3HP
Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269
71.5HP
Displacement
203in³
Bore
3.7in
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269
70.3HP
Stroke
4.7in
Engine Model
Cat C3.3B
Net Power
70.3HP

Service Refill Capacities

Engine Oil
3gal (US)
Cooling System
2.6gal (US)
Hydraulic System
29gal (US)
Fuel Tank
39gal (US)
Hydraulic Tank
14gal (US)

Weight Increase from Minimum Configuration

Long Stick
146lb
Steel Tracks with Pads
752lb
Counterweight
552lb

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.

Hydraulic System

Auxiliary Circuit - Secondary - Pressure
4134psi
Auxiliary Circuit - Primary - Flow
35gal/min
Auxiliary Circuit - Primary - Pressure
4134psi
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Long
8032lb
Operating Pressure - Equipment
4134psi
Operating Pressure - Swing
3626psi
Operating Pressure - Travel
4134psi
Digging Force - Bucket
13946lb
Digging Force - Stick - Standard
9509lb
Auxiliary Circuit - Secondary - Flow
9gal/min
Pump Flow at 2,400 rpm
44gal/min

Certification - Cab

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

Blade

Width - Wide
97in
Width - Standard
91in
Height
17in

Swing System

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

Standard/Optional Features

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 Two Speed Travel
    • Extended Life Coolant, –37° C (–35° F)
    • Radial Seal – Double Element Air Filter
    • Fuel Water Separator with Indicator
    • Ecology Drain
    • Automatic Swing Brake
    • Automatic Engine Shutdown
    • Automatic Engine Idle
  • Hydraulics
    • Load Sensing/Flow Sharing Hydraulics
    • Variable Displacement Piston Pump
    • HYDO Advanced Hydraulic Oil
    • Hydraulic Temperature Monitoring
    • Power On Demand
    • Certified Accumulator
    • Smart Tech Electronic Pump
  • Operator Environment
    • 12V Power Socket
    • Rear Window Emergency Exit
    • Mounting Bosses for Top and Front Guards
    • Hydraulic Lockout Controls
    • Radio – Bluetooth®, USB, Auxiliary, Microphone
    • Assisted Front Window Overhead Storage
    • Travel Cruise Control
    • Fabric, High Back, Suspension Seat
    • Cup Holder
    • Control Pattern Changer
    • TOPS – ISO 12117:1997
    • Travel Pedals and Hand Levers
    • Literature Holder
    • Removable, Washable Floor Mat
    • Adjustable Wrist Rests
    • LED Interior Light
    • Retractable Seat Belt (75 mm/3 in)
    • ROPS – ISO 12117-2:2008
    • Color LCD Monitor
      – Fuel Level and Coolant Temperature Gauges
      – Maintenance and Machine Monitoring
      – Performance and Machine Adjustments
      – Numeric Security Code
      – Multiple Languages
      – Camera Ready
      – Hour Meter with Wake Up Switch
      – Jog Dial Control Interface
    • Skylight
    • Stick Steer Mode
    • Cat Key with Passcode Option
    • Coat Hook
    • Top Guard – ISO 10262:1998 (Level II)
    • Sealed and Pressurized Cab
    • HVAC with Automatic Temperature Control
    • Integrated Lower Front Window
    • Molded Footrests
    • Operator Sound Pressure 72 dB(A) ISO 6396:2008
  • Undercarriage
    • Dozer Blade
    • Hydraulic Track Adjusters
    • Tie Down Eyes on Track Frame
    • Dozer Float
    • Greased and Lubricated Track
    • Bolt-on, Reversible Wear Edge
    • Rubber Tracks
  • Boom, Stick And Linkages
    • One Piece Boom (3400 mm/133.9 in)
    • Standard Stick (1820 mm/71.7 in)
    • Long Stick (2360 mm/92.9 in)
    • Front Shovel Capable (Pin-On/Manual Coupler/Hydraulic Coupler – not available in all regions)
    • Thumb Ready (not available in all regions)
    • Certified Lifting Eye (not available in all regions)
  • Electrical
    • 12 Volt Electrical System
    • 60 Ampere Alternator
    • 900 CCA Maintenance Free Battery
    • Circuit Breaker
    • Ignition Key Stop Switch
    • Signaling/Warning Horn
    • Product Link Elite Lite (regulations apply)
    • Travel Alarm

Optional Equipment:

  • Operator Environment
    • Rain Visor
    • Air Suspension Heated Seat
  • Electrical
    • Rearview Camera
    • Rotating Beacon
  • Other
    • 2nd Auxiliary Hydraulic Lines with Case Drain
    • Additional Counterweight
    • Boom and Stick Hose Burst Check Valves
    • Bucket Linkage with Lift Eye
    • Track Guides
    • Steel Tracks (450 mm/17.7 in wide)
    • Steel Track with Rubber Pads
    • Wide Steel Tracks (600 mm/23.6 in)
    • Attachments including Buckets, Augers and Hammers
    • Water Jacket Heater
    • Wide Dozer Blade
    • Refueling Pump
    • Variable Angle Boom (please see 308 CR VAB brochure for VAB specs and additional information)
    • Cab Guarding

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