Caterpillar

309 CR Mini Hydraulic Excavator

Name: 309 CR Mini Hydraulic Excavator
Brand: Caterpillar

Net Power

69.5 hp

51.8 kW

Operating Weight

21091 lb

9565 kg

Dig Depth

182.8 in

4642 mm

Overview

The Cat® 309 CR Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications.The 309 CR also features high flow hydraulics to handle power hungry attachments such as mulchers and brushcutters.

Media

See the new Cat 7-10 Ton Mini Excavators in action.

Learn about the features and benefits of the new Cat 7-10 Ton Mini Excavators.

Easy to read monitor lets you adjust machine settings to your operating preference.

Easily switch from traditional travel controls with levers and pedals to joystick controls with a push of a button.

Hear how Webb Excavating in Tennessee uses their Cat 309 CR Mini Excavator to help their business succeed.

Learn about the recommended Daily Maintenance and Inspection for the Cat 7 to 10 Ton Mini Excavators in this quick video.

Learn about the Safety Features on the Cat 7 to 10 Ton Mini Excavators in this quick video.

Exterior

Model shown represents features on all Cat® Mini Excavators except where indicated.

Interior

Model shown represents features on all Cat® Mini Excavators except where indicated.

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Features

ALL DAY COMFORT

EASY TO OPERATE

STICK STEER TRAVEL MODE

BIG PERFORMANCE IN A MINI DESIGN

HIGH FLOW

SAFETY ON THE JOB SITE

SIMPLE SERVICE FOR LESS DOWNTIME

LOWER OPERATING COSTS

UNMATCHED DEALER SUPPORT

SUSTAINABILITY

Specifications

US Metric

Engine

Spec	Value
Net Power	69.5 hp 51.8 kW
Displacement	203 in³ 3.33 l
Bore	3.7 in 94 mm
Stroke	4.7 in 120 mm
Gross Power – SAE J1995	74.3 hp 55.4 kW
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
Engine Model	Cat C3.3B Cat C3.3B

Specifications

Spec	Value
Note	The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage. The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.

Weights

Spec	Value
Operating Weight	21091 lb 9565 kg
Maximum Operating Weight with Cab**	21091 lb 9565 kg
Note (1)	Minimum Weight is based on steel tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket. Minimum Weight is based on steel 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.
Minimum Operating Weight with Cab*	19735 lb 8950 kg

Dimensions - Long Stick

Spec	Value
Dig Depth	182.8 in 4642 mm
Maximum Dump Clearance	199.7 in 5072 mm
Boom In Reach	126.6 in 3215 mm
Vertical Wall	134 in 3404 mm
Maximum Blade Depth	26 in 671 mm
O/A Undercarriage Length	126 in 3200 mm
O/A Track Width	97.2 in 2470 mm
Stick Length	92.8 in 2358 mm
Maximum Blade Height	16.1 in 408 mm
Maximum Dig Height	277.1 in 7039 mm
Tail Swing with Counterweight	62.4 in 1585 mm
Maximum Reach	300.7 in 7637 mm
Cab Height	100 in 2541 mm
Ground Clearance	14 in 356 mm
Swing Bearing – Height	29.7 in 756 mm
Track Belt/Shoe Width	17.7 in 450 mm
Boom Swing – Left	23.8 in 604 mm
Boom Swing – Right	36.8 in 935 mm
Tail Swing without Counterweight	57.1 in 1450 mm
Maximum Reach – Ground Level	293.7 in 7460 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.
Note (2)	*With blade positioned at the rear of the machine. *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. 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
Overall Shipping Length – with Counterweight	7052 mm (277.6 in)* 7052 mm (277.6 in)*
Height – Boom Working – With Tools**	120.1 in 3050 mm
Overall Shipping Length – without Counterweight	7052 mm (277.6 in)* 7052 mm (277.6 in)*

Weight Increase from Minimum Configuration

Spec	Value
Steel Tracks with Pads	728 lb 330 kg
Long Stick	146 lb 66 kg
Counterweight	552 lb 250 kg

Travel System

Spec	Value
Gradeability – Maximum	30 degrees 30 degrees
Ground Pressure – Minimum Weight	5 psi 34.7 kPa
Ground Pressure – Maximum Weight	5.4 psi 37.1 kPa
Travel Speed – High	3.1 mile/h 4.9 km/h
Travel Speed – Low	1.6 mile/h 2.6 km/h
Maximum Traction Force – High Speed	6497 lb 28.9 kN
Maximum Traction Force – Low Speed	19064 lb 84.8 kN

Service Refill Capacities

Spec	Value
Engine Oil	3 gal (US) 11.2 l
Fuel Tank	39 gal (US) 147 l
Hydraulic System	29 gal (US) 110 l
Cooling System	2.6 gal (US) 10 l
Hydraulic Tank	14 gal (US) 53 l

Hydraulic System

Spec	Value
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure – Swing	3626 psi 250 bar
Digging Force – Stick – Standard	9500 lb 42.3 kN
Digging Force – Stick – Long	8023 lb 35.7 kN
Operating Pressure – Travel	4134 psi 285 bar
Pump Flow at 2,400 rpm	62 gal/min 233 l/min
Digging Force – Bucket	13943 lb 62 kN
Operating Pressure – Equipment	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.
Maximum Auxiliary Circuit – Secondary – Flow at Pump	9 gal/min 33 l/min
Maximum Auxiliary Circuit – Primary – Pressure at Pump	4134 psi 285 bar
Maximum Auxiliary Circuit – Primary – Flow at Pump	35 gal/min 131 l/min
Maximum Auxiliary Circuit – Secondary – Pressure at Pump	4134 psi 285 bar
Maximum Auxiliary Circuit – High Flow – Pressure at Pump	4134 lbf/in 285 bar
Maximum Auxiliary Circuit – High Flow – Flow at Pump	37 gal/min 140 l/min

Swing System

Spec	Value
Machine Swing Speed	10.6 r/min 10.6 r/min
Boom Swing – Right	50 degrees 50 degrees
Boom Swing – Left	60 degrees 60 degrees

Blade

Spec	Value
Height	17 in 431 mm
Width – Wide	104 in 2640 mm
Width – Standard	97 in 2470 mm

Certification - Cab

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

Sound

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

Dimensions - Standard Stick

Spec	Value
Boom Swing – Right	36.8 in 935 mm
Maximum Dump Clearance	187.4 in 4760 mm
Tail Swing without Counterweight	57.1 in 1450 mm
Maximum Reach – Ground Level	273.6 in 6949 mm
O/A Undercarriage Length	126 in 3200 mm
Cab Height	100 in 2541 mm
Swing Bearing – Height	29.7 in 756 mm
Maximum Dig Height	265.2 in 6736 mm
Track Belt/Shoe Width	17.7 in 450 mm
O/A Track Width	97.2 in 2470 mm
Ground Clearance	14 in 356 mm
Maximum Reach	281.1 in 7141 mm
Tail Swing with Counterweight	62.4 in 1585 mm
Boom In Reach	120.4 in 3059 mm
Vertical Wall	117.8 in 2991 mm
Dig Depth	161.7 in 4108 mm
Stick Length	71.8 in 1820 mm
Boom Swing – Left	23.8 in 604 mm
Maximum Blade Height	16.1 in 408 mm
Maximum Blade Depth	26 in 671 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.
Overall Shipping Length – without Counterweight	266.7 in 6774 mm
Overall Shipping Length – with Counterweight	266.7 in 6774 mm
Note (2)	*With blade positioned at the rear of the machine. *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. Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
Height – Boom Transport – No Tools*	95.7 in 2430 mm
Height – Boom Working – With Tools**	104.7 in 2660 mm

Air Conditioning System

Spec	Value
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. 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.

Sustainability

Spec	Value
Recyclability	96% 96%

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
Dedicated Auxiliary Hydraulic Pump
Power On Demand
Hydraulic Temperature Monitoring
Certified Accumulator
HYDO Advanced Hydraulic Oil
Ecology Drain

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
Travel Alarm

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