US
Metric

Overview

The Cat® 306 CR Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications.

Engine

Net Power
55.90 HP
41.70 kW
Engine Model
Cat C2.4 Turbo
Gross Power - ISO 14396
57.90 HP
43.20 kW
Displacement
148.00 in³
2.43 l
Bore
3.40 in
87.00 mm
Stroke
4.00 in
102.40 mm
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
55.90 HP
41.70 kW

Weights

Operating Weight
15766.00 lb
7150.00 kg
Minimum Operating Weight with Canopy*
14134.00 lb
6410.00 kg
Maximum Operating Weight with Canopy**
15633.00 lb
7090.00 kg
Note (2)
**Maximum Weight is based on steel tracks with pads, extra counterweight, operator, full fuel tank, long stick, fixed blade and no bucket.
Maximum Operating Weight with Cab**
15766.00 lb
7150.00 kg
Minimum Operating Weight with Cab*
14266.00 lb
6470.00 kg
Note (1)
*Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.

Weight Increase from Minimum Configuration

Counterweight
551.00 lb
250.00 kg
Long Stick
97.00 lb
44.00 kg
Steel Tracks with Pads
827.00 lb
375.00 kg
Angle Blade
225.00 lb
102.00 kg
XTC Carriage (no tool)
141.00 lb
64.00 kg

Travel System

Ground Pressure - Minimum Weight
5.10 psi
35.40 kPa
Ground Pressure - Maximum Weight
5.70 psi
39.10 kPa
Gradeability - Maximum
30 degrees
Maximum Traction Force - High Speed
6969.00 lbf
31.00 kN
Maximum Traction Force - Low Speed
12589.00 lbf
56.00 kN
Travel Speed - High
3.10 mile/h
5.00 km/h
Travel Speed - Low
1.70 mile/h
2.80 km/h

Service Refill Capacities

Cooling System
2.60 gal (US)
10.00 l
Hydraulic System
27.50 gal (US)
104.00 l
Hydraulic Tank
14.00 gal (US)
53.00 l
Engine Oil
2.10 gal (US)
8.00 l
Fuel Tank
34.30 gal (US)
130.00 l

Hydraulic System

Operating Pressure - Travel
3553.00 psi
24500.00 kPa
Auxiliary Circuit - Primary - Flow
24.00 gal/min
90.00 l/min
Digging Force - Bucket
11578.00 lbf
51.50 kN
Auxiliary Circuit - Primary - Pressure
3553.00 psi
24500.00 kPa
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary - Flow
9.00 gal/min
33.00 l/min
Operating Pressure - Equipment
3553.00 psi
24500.00 kPa
Auxiliary Circuit - Secondary - Pressure
3553.00 psi
24500.00 kPa
Digging Force - Stick - Standard
6632.00 lbf
29.50 kN
Operating Pressure - Swing
3263.00 psi
22500.00 kPa
Digging Force - Stick - Long
5957.00 lbf
26.50 kN
Pump Flow at 2,400 rpm
40.00 gal/min
151.00 l/min

Swing System

Machine Swing Speed
11.00 r/min
11.00 r/min

Blade

Straight Blade Width
78.00 in
1980.00 mm
Angle Blade Width
78.00 in
1980.00 mm
Straight Blade Height
15.40 in
390.00 mm
Angle Blade Height
15.70 in
400.00 mm

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

Sound

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

Dimensions - Standard Stick

Track Belt/Shoe Width
16.00 in
400.00 mm
Maximum Reach
248.00 in
6295.00 mm
Stick Length
62.00 in
1580.00 mm
Vertical Wall
107.00 in
2710.00 mm
Swing Bearing - Height
27.00 in
672.00 mm
Maximum Reach - Ground Level
241.00 in
6130.00 mm
Maximum Blade Height
16.00 in
415.00 mm
Ground Clearance
12.00 in
306.00 mm
Boom In Reach
98.00 in
2485.00 mm
Boom Swing - Right
36.00 in
910.00 mm
Transport Height
69.00 in
1755.00 mm
Tail Swing with Counterweight
58.00 in
1475.00 mm
Cab Height
100.00 in
2545.00 mm
Width over Upper House
77.00 in
1950.00 mm
Maximum Dump Clearance
170.00 in
4325.00 mm
Tail Swing without Counterweight
53.00 in
1350.00 mm
Boom Swing - Left
29.00 in
735.00 mm
O/A Undercarriage Length
102.00 in
2580.00 mm
Maximum Dig Height
230.00 in
5835.00 mm
Maximum Blade Depth
24.00 in
600.00 mm
O/A Track Width
78.00 in
1980.00 mm
Dig Depth
146.00 in
3710.00 mm
O/A Shipping Length
235.00 in
5975.00 mm

Dimensions - Long Stick

Dig Depth
162.00 in
4110.00 mm
Maximum Blade Height
16.00 in
415.00 mm
O/A Track Width
78.00 in
1980.00 mm
Track Belt/Shoe Width
16.00 in
400.00 mm
Tail Swing with Counterweight
58.00 in
1475.00 mm
Vertical Wall
125.00 in
3165.00 mm
Boom In Reach
117.00 in
2960.00 mm
Maximum Blade Depth
24.00 in
600.00 mm
Maximum Dig Height
241.00 in
6130.00 mm
Transport Height
95.00 in
2410.00 mm
Stick Length
78.00 in
1980.00 mm
Ground Clearance
12.00 in
306.00 mm
Swing Bearing - Height
27.00 in
672.00 mm
Width over Upper House
77.00 in
1950.00 mm
O/A Undercarriage Length
102.00 in
2580.00 mm
O/A Shipping Length
234.00 in
5950.00 mm
Cab Height
100.00 in
2545.00 mm
Maximum Reach
263.00 in
6685.00 mm
Boom Swing - Left
29.00 in
735.00 mm
Tail Swing without Counterweight
53.00 in
1350.00 mm
Boom Swing - Right
36.00 in
910.00 mm
Maximum Dump Clearance
182.00 in
4610.00 mm
Maximum Reach - Ground Level
257.00 in
6535.00 mm

Air Conditioning System

Air Conditioning
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1287). The system contains 0.9 kg of refrigerant which has a CO2 equivalent of 1.287 metric tonnes.

Swing System

Boom Swing - Right
65 degrees
Boom Swing - Left
60 degrees
Features

ALL DAY COMFORT

  • Your choice of a canopy (availability dependent on region) or a sealed and pressurized cab 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 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!

BIG PERFORMANCE IN A MINI DESIGN

  • Increased lifting, swinging, travel and multi-functioning performance help you get the job done more efficiently.

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. An optional 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.

CHOICES

  • Configure the machine to meet your specific application needs with a straight blade, angle blade, or Extra Tool Carrier (XTC).

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.
Standard Equipment
  • OPERATOR ENVIRONMENT – CAB AND CANOPY
    • 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
    • Hydraulic Lockout Controls
    • High Back, Suspension Seat
    • Retractable Seat Belt (75 mm/3 in)
    • Coat Hook
    • Cup Holder
    • Literature Holder
    • Mounting Bosses for Top and Front Guards
    • Signaling/Warning Horn
    • Cab and (left side) Boom Work Lights
    • Utility Space for Mobile Phone
    • Next Generation Color LCD Monitor (IP66)
      – 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
  • OPERATOR ENVIRONMENT – CAB ONLY
    • Operator Sound Pressure 72 dB(A) ISO 6396:2008
    • HVAC with Automatic Temperature Control
    • Integrated Lower Front Window
    • Assisted Front Window Overhead Storage
    • Rear Window Emergency Exit
    • LED Interior Light
    • 12V Power Socket
    • Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only)
    • Skylight
    • Jog dial interface
  • UNDERCARRIAGE
    • Greased and Lubricated Track
    • Hydraulic Track Adjusters
    • Tie Down Eyes on Track Frame
    • Dozer Straight Blade
    • Dozer Float
    • Bolt-on, Reversible Wear Edge
    • Rubber Tracks
  • BOOM, STICK AND LINKAGES
    • One Piece Boom (3055 mm/120.3 in)
    • Standard Stick (1580 mm/62.2 in)
    • Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler for Cat Tools
    • Thumb Ready
  • ELECTRICAL
    • 12 Volt Electrical System
    • 90 Ampere Alternator
    • 650 CCA Maintenance Free Battery
    • Battery Disconnect
    • Circuit Breaker
    • Ignition Key Stop Switch
    • Signaling/Warning Horn
    • Product Link™ Basic (regulations apply)
    • Travel Alarm
  • OTHER
    • Locks on External Enclosure Doors
    • Lockable Fuel Cap
    • Beacon Socket
    • Rear Reflectors
Optional Equipment
  • OPERATOR ENVIRONMENT – CAB AND CANOPY
    • 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
  • OPERATOR ENVIRONMENT – CAB ONLY
    • Cab Heat Only
    • Air Suspension Heated Seat
  • UNDERCARRIAGE
    • Angle Blade
    • Extra Tool Carrier (XTC)
    • Steel Tracks (450 mm/17.7 in wide)
    • Steel Track with Rubber Pads
  • BOOM, STICK AND LINKAGES
    • Long Stick (190 mm/78 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)
    • Camera
    • Rotating Beacon
  • GUARDING
    • Heavy Duty Front Guard ISO 10262 1998 Level II
    • Mesh Front Guard ISO 10262 1998 Level I
    • Overhead Cab Guard ISO 10262 1998 Level II
    • Polycarbonate Front Window EN356 P5A (Cab Only)
    • Track Guards
  • OTHER
    • Additional Counterweight
    • Water Jacket Heater
    • Refueling Pump