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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.
Benefits
4
Industry First Features
Cat Exclusives in a Mini Excavator
Up to
10%
Lower Total Ownership Costs
with improved fuel efficiency and longer service intervals
Up to
20%
More Performance
with customizable operator settings and improvements in lift, swing, travel and multifunction
Features At A Glance
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, blade float allows for easy clean up and long undercarriage provides improved stability.
HIGH FLOW
Dedicated auxiliary hydraulic pump is ideal for running power-hungry attachments while allowing the machine to simultaneously travel and multifunction. This feature allows consistent pressure to the auxiliary lines with no loss of hydraulic power keeping your attachment running at full power maintaining optimal productivity.
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.
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® C3.3B 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)
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
Operating Weight
21091 lb9565 kg
Maximum Operating Weight with Cab**
21091 lb9565 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 lb8950 kg
Engine
Engine Model
Cat C3.3BCat C3.3B
Displacement
203 in³3.33 l
Bore
3.7 in94 mm
Stroke
4.7 in120 mm
Gross Power - SAE J1995
74.3 HP55.4 kW
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
69.5 HP51.8 kW
Dimensions - Long Stick
Dig Depth
182.8 in4642 mm
Maximum Dump Clearance
199.7 in5072 mm
Boom In Reach
126.6 in3215 mm
Vertical Wall
134 in3404 mm
Maximum Blade Depth
26 in671 mm
O/A Undercarriage Length
126 in3200 mm
O/A Track Width
97.2 in2470 mm
Stick Length
92.8 in2358 mm
Maximum Blade Height
16.1 in408 mm
Maximum Dig Height
277.1 in7039 mm
Tail Swing with Counterweight
62.4 in1585 mm
Maximum Reach
300.7 in7637 mm
Cab Height
100 in2541 mm
Ground Clearance
14 in356 mm
Swing Bearing - Height
29.7 in756 mm
Track Belt/Shoe Width
17.7 in450 mm
Boom Swing - Left
23.8 in604 mm
Boom Swing - Right
36.8 in935 mm
Tail Swing without Counterweight
57.1 in1450 mm
Maximum Reach - Ground Level
293.7 in7460 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 in2260 mm
Overall Shipping Length - with Counterweight
7052 mm (277.6 in)***7052 mm (277.6 in)***
Height - Boom Working - With Tools**
120.1 in3050 mm
Overall Shipping Length - without Counterweight
7052 mm (277.6 in)***7052 mm (277.6 in)***
Weight Increase from Minimum Configuration
Steel Tracks with Pads
728 lb330 kg
Long Stick
146 lb66 kg
Counterweight
552 lb250 kg
Travel System
Gradeability - Maximum
30 degrees30 degrees
Ground Pressure - Minimum Weight
5 psi34.7 kPa
Ground Pressure - Maximum Weight
5.4 psi37.1 kPa
Travel Speed - High
3.1 mile/h4.9 km/h
Travel Speed - Low
1.6 mile/h2.6 km/h
Maximum Traction Force - High Speed
6497 lb28.9 kN
Maximum Traction Force - Low Speed
19064 lb84.8 kN
Service Refill Capacities
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
Type
Load Sensing Hydraulics with Variable Displacement Piston PumpLoad Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing
3626 psi250 bar
Digging Force - Stick - Standard
9500 lb42.3 kN
Digging Force - Stick - Long
8023 lb35.7 kN
Operating Pressure - Travel
4134 psi285 bar
Pump Flow at 2,400 rpm
62 gal/min233 l/min
Digging Force - Bucket
13943 lb62 kN
Operating Pressure - Equipment
4134 psi285 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/min33 l/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump
4134 psi285 bar
Maximum Auxiliary Circuit - Primary - Flow at Pump
35 gal/min131 l/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
4134 psi285 bar
Maximum Auxiliary Circuit - High Flow - Pressure at Pump
4134 lbf/in285 bar
Maximum Auxiliary Circuit - High Flow - Flow at Pump
37 gal/min140 l/min
Swing System
Machine Swing Speed
10.6 r/min10.6 r/min
Boom Swing - Right
50 degrees50 degrees
Boom Swing - Left
60 degrees60 degrees
Blade
Height
17 in431 mm
Width - Wide
104 in2640 mm
Width - Standard
97 in2470 mm
Certification - Cab
Roll Over Protective Structure (ROPS)
ISO 12117-2:2008ISO 12117-2:2008
Top Guard
ISO 10262:1998 (Level I)ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS)
ISO 12117:1997ISO 12117:1997
Sound
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
Boom Swing - Right
36.8 in935 mm
Maximum Dump Clearance
187.4 in4760 mm
Tail Swing without Counterweight
57.1 in1450 mm
Maximum Reach - Ground Level
273.6 in6949 mm
O/A Undercarriage Length
126 in3200 mm
Cab Height
100 in2541 mm
Swing Bearing - Height
29.7 in756 mm
Maximum Dig Height
265.2 in6736 mm
Track Belt/Shoe Width
17.7 in450 mm
O/A Track Width
97.2 in2470 mm
Ground Clearance
14 in356 mm
Maximum Reach
281.1 in7141 mm
Tail Swing with Counterweight
62.4 in1585 mm
Boom In Reach
120.4 in3059 mm
Vertical Wall
117.8 in2991 mm
Dig Depth
161.7 in4108 mm
Stick Length
71.8 in1820 mm
Boom Swing - Left
23.8 in604 mm
Maximum Blade Height
16.1 in408 mm
Maximum Blade Depth
26 in671 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 in6774 mm
Overall Shipping Length - with Counterweight
266.7 in6774 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 in2430 mm
Height - Boom Working - With Tools**
104.7 in2660 mm
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 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 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.
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)
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
UNDERCARRIAGE
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
BOOM, STICK AND LINKAGES
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
ELECTRICAL
Product Link™ Elite (regulations apply)
Rearview Camera
Rotating Beacon
GUARDING
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
OTHER
Additional Counterweight
Water Jacket Heater
Refueling Pump
Variable Angle Boom (refer to 309 CR VAB brochure for VAB specs and additional information)
See how 309 CR compares against frequently compared products.
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