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309 CR Mini Hydraulic Excavator

309 CR Mini Hydraulic Excavator

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.

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Net Power69.5hp

Engine ModelCat C3.3B

Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/126969.5hp




Gross Power - SAE J199574.3hp

Operating Weight21091lb

Note (1)*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.

Minimum Operating Weight with Cab*19735lb

Maximum Operating Weight with Cab**21091lb

Dig Depth182.8in

Boom In Reach126.6in

Maximum Dump Clearance199.7in

Vertical Wall134in

O/A Undercarriage Length126in

Maximum Blade Depth26in

O/A Track Width97.2in

Maximum Dig Height277.1in

Stick Length92.8in

Tail Swing with Counterweight62.4in

Maximum Blade Height16.1in

Swing Bearing - Height29.7in

Track Belt/Shoe Width17.7in

Boom Swing - Right36.8in

Maximum Reach300.7in

Tail Swing without Counterweight57.1in

Cab Height100in

Maximum Reach - Ground Level293.7in

Ground Clearance14in

Height - Boom Transport - No Tools*89in

Height - Boom Working - With Tools**120.1in

Boom Swing - Left23.8in

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.

Overall Shipping Length - with Counterweight7052 mm (277.6 in)***

Overall Shipping Length - without Counterweight7052 mm (277.6 in)***


Width - Wide104in

Width - Standard97in

Gradeability - Maximum30 degrees

Ground Pressure - Minimum Weight5psi

Travel Speed - High3.1mile/h

Travel Speed - Low1.6mile/h

Maximum Traction Force - High Speed6497lb

Maximum Traction Force - Low Speed19064lb

Ground Pressure - Maximum Weight5.4psi

Engine Oil3gal (US)

Fuel Tank39gal (US)

Hydraulic System29gal (US)

Cooling System2.6gal (US)

Hydraulic Tank14gal (US)

TypeLoad Sensing Hydraulics with Variable Displacement Piston Pump

Operating Pressure - Swing3626psi

Digging Force - Stick - Standard9500lb

Digging Force - Stick - Long8023lb

Operating Pressure - Travel4134psi

Pump Flow at 2,400 rpm62gal/min

Digging Force - Bucket13943lb

Operating Pressure - Equipment4134psi

NoteFlow and pressure are not combinable. Under load, as flow rises pressure goes down.

Maximum Auxiliary Circuit - High Flow - Pressure at Pump4134lbf/in

Maximum Auxiliary Circuit - High Flow - Flow at Pump37gal/min

Maximum Auxiliary Circuit - Secondary - Flow at Pump9gal/min

Maximum Auxiliary Circuit - Primary - Pressure at Pump4134psi

Maximum Auxiliary Circuit - Primary - Flow at Pump35gal/min

Maximum Auxiliary Circuit - Secondary - Pressure at Pump4134psi

Machine Swing Speed10.6r/min

Boom Swing - Right50 degrees

Boom Swing - Left60 degrees

Roll Over Protective Structure (ROPS)ISO 12117-2:2008

Top GuardISO 10262:1998 (Level I)

Tip Over Protective Structure (TOPS)ISO 12117:1997

Steel Tracks with Pads728lb

Long Stick146lb


NoteEuropean Union Directive "2000/14/EC"

Operator Sound Pressure (ISO 6396:2008)72dB(A)

Average Exterior Sound Pressure (ISO 6395:2008)99dB(A)

Boom Swing - Right36.8in

Cab Height100in

Maximum Dump Clearance187.4in

Tail Swing without Counterweight57.1in

Maximum Reach281.1in

Maximum Reach - Ground Level273.6in

O/A Undercarriage Length126in

Boom In Reach120.4in

Swing Bearing - Height29.7in

Maximum Dig Height265.2in

Track Belt/Shoe Width17.7in

O/A Track Width97.2in

Ground Clearance14in

Tail Swing with Counterweight62.4in

Vertical Wall117.8in

Note*Boom Height when stick is pinned in transport position with no attachments.

Dig Depth161.7in

Stick Length71.8in

Boom Swing - Left23.8in

Note (2)***With blade positioned at the rear of the machine.

Maximum Blade Height16.1in

Note (1)**Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.

Maximum Blade Depth26in

Overall Shipping Length - without Counterweight266.7in

Overall Shipping Length - with Counterweight266.7in

Height - Boom Transport - No Tools*95.7in

Height - Boom Working - With Tools**104.7in

Air ConditioningThe 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.


NoteThe 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.


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)


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


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)


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


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


Greased and Lubricated Track

Tie Down Eyes on Track Frame

Dozer Blade

Dozer Float

Bolt-on, Reversible Wear Edge


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


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)


Long Stick (2360 mm/92.9 in)

Attachments including Buckets, Augers and Hammers

2nd Auxiliary Hydraulic Lines with Case Drain

Boom Lowering Check Valve

Stick Lowering Check Valve

Certified Lifting Eye


12 Volt Electrical System

60 Ampere Alternator

Circuit Breaker

900 CCA Maintenance Free Battery

Battery Disconnect

Ignition Key Stop Switch

Travel Alarm


Product Link Elite (regulations apply)

Rearview Camera

Rotating Beacon


Locks on External Enclosure Doors

Lockable Fuel Cap

Beacon Socket

Rear Reflectors


Additional Counterweight

Water Jacket Heater

Refueling Pump

Variable Angle Boom (refer to 309 CR VAB brochure for VAB specs and additional information)


Mesh Front Guard ISO 10262 1998 Level I

Heavy Duty Front Guard ISO 10262 1998 Level II

Top Guard ISO 10262 1998 Level II

Polycarbonate Front Window EN356 P5A (Cab Only)

Track Guards

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