306 CR

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An extensive line of Cat® mini hydraulic excavators offers the performance to dig in and be productive on every job.

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Specifications

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.

Blade

Straight Blade Width

78 in 1980 mm
Angle Blade Width

78 in 1980 mm
Straight Blade Height

15.4 in 390 mm
Angle Blade Height

15.7 in 400 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

Dimensions - Long Stick

Dig Depth

162 in 4110 mm
Maximum Blade Height

16 in 415 mm
O/A Track Width

78 in 1980 mm
Track Belt/Shoe Width

16 in 400 mm
Tail Swing with Counterweight

58 in 1475 mm
Vertical Wall

125 in 3165 mm
Boom In Reach

117 in 2960 mm
Maximum Blade Depth

24 in 600 mm
Maximum Dig Height

241 in 6130 mm
Transport Height

95 in 2410 mm
Stick Length

78 in 1980 mm
Ground Clearance

12 in 306 mm
Swing Bearing - Height

27 in 672 mm
Width over Upper House

77 in 1950 mm
O/A Undercarriage Length

102 in 2580 mm
O/A Shipping Length

234 in 5950 mm
Cab Height

100 in 2545 mm
Maximum Reach

263 in 6685 mm
Boom Swing - Left

29 in 735 mm
Tail Swing without Counterweight

53 in 1350 mm
Boom Swing - Right

36 in 910 mm
Maximum Dump Clearance

182 in 4610 mm
Maximum Reach - Ground Level

257 in 6535 mm

Dimensions - Standard Stick

Track Belt/Shoe Width

16 in 400 mm
Maximum Reach

248 in 6295 mm
Stick Length

62 in 1580 mm
Vertical Wall

107 in 2710 mm
Swing Bearing - Height

27 in 672 mm
Maximum Reach - Ground Level

241 in 6130 mm
Maximum Blade Height

16 in 415 mm
Ground Clearance

12 in 306 mm
Boom In Reach

98 in 2485 mm
Boom Swing - Right

36 in 910 mm
Transport Height

69 in 1755 mm
Tail Swing with Counterweight

58 in 1475 mm
Cab Height

100 in 2545 mm
Width over Upper House

77 in 1950 mm
Maximum Dump Clearance

170 in 4325 mm
Tail Swing without Counterweight

53 in 1350 mm
Boom Swing - Left

29 in 735 mm
O/A Undercarriage Length

102 in 2580 mm
Maximum Dig Height

230 in 5835 mm
Maximum Blade Depth

24 in 600 mm
O/A Track Width

78 in 1980 mm
Dig Depth

146 in 3710 mm
O/A Shipping Length

235 in 5975 mm

Engine

Net Power

55.9 hp 41.7 kW
Gross Power - ISO 14396

57.9 hp 43.2 kW
Displacement

148 in³ 2.43 l
Bore

3.4 in 87 mm
Stroke

4 in 102.4 mm
Engine Model

Cat C2.4 Turbo
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269

55.9 hp 41.7 kW

Hydraulic System

Operating Pressure - Travel

3553 psi 24500 kPa
Auxiliary Circuit - Primary - Flow

24 gal/min 90 l/min
Digging Force - Bucket

11578 lbf 51.5 kN
Auxiliary Circuit - Primary - Pressure

3553 psi 24500 kPa
Type

Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary - Flow

9 gal/min 33 l/min
Operating Pressure - Equipment

3553 psi 24500 kPa
Auxiliary Circuit - Secondary - Pressure

3553 psi 24500 kPa
Digging Force - Stick - Standard

6632 lbf 29.5 kN
Operating Pressure - Swing

3263 psi 22500 kPa
Digging Force - Stick - Long

5957 lbf 26.5 kN
Pump Flow at 2,400 rpm

40 gal/min 151 l/min

Service Refill Capacities

Cooling System

2.6 gal (US) 10 l
Hydraulic System

27.5 gal (US) 104 l
Hydraulic Tank

14 gal (US) 53 l
Engine Oil

2.1 gal (US) 8 l
Fuel Tank

34.3 gal (US) 130 l

Sound

Operator Sound Pressure (ISO 6396:2008)

72 dB(A) 72 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008)

99 dB(A) 99 dB(A)
Note

European Union Directive “2000/14/EC”

Sustainability

Recyclability

96%

Swing System

Boom Swing - Right

65 degrees
Boom Swing - Left

60 degrees
Machine Swing Speed

11 r/min 11 r/min

Travel System

Ground Pressure - Minimum Weight

5.1 psi 35.4 kPa
Ground Pressure - Maximum Weight

5.7 psi 39.1 kPa
Gradeability - Maximum

30 degrees
Maximum Traction Force - High Speed

6969 lbf 31 kN
Maximum Traction Force - Low Speed

12589 lbf 56 kN
Travel Speed - High

3.1 mile/h 5 km/h
Travel Speed - Low

1.7 mile/h 2.8 km/h

Weight Increase from Minimum Configuration

Counterweight

551 lb 250 kg
Long Stick

97 lb 44 kg
Steel Tracks with Pads

827 lb 375 kg
Angle Blade

225 lb 102 kg
XTC Carriage (no tool)

141 lb 64 kg

Weights

Operating Weight

15766 lb 7150 kg
Minimum Operating Weight with Canopy*

14134 lb 6410 kg
Maximum Operating Weight with Canopy**

15633 lb 7090 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 lb 7150 kg
Minimum Operating Weight with Cab*

14266 lb 6470 kg
Note (1)

*Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.

Benefits

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.

SUSTAINABILITY

The Cat® C2.4 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)

Equipment Info