- Category: Mini Excavators ➔
- Manufacturer: Caterpillar ➔
- Model: 309 CR ➔
The Caterpillar 309 CR Mini Excavator is a powerful and versatile machine designed for various construction and excavation tasks. With a net power of 70.3 hp and a hydraulic system featuring load sensing hydraulics with a variable displacement piston pump, this excavator offers impressive digging forces and operating pressures. Equipped with a long stick boom and standard stick options, as well as a maximum reach of 300.7 inches, this compact excavator is ideal for reaching into tight spaces while maintaining stability. The Caterpillar 309 CR also boasts efficient travel speeds, impressive weight capacities, and comprehensive service refill capacities, making it a reliable choice for any job site.
General Specifications
Engine | C3.3B Starting 2021 Model Year |
Max Digging Depth | 97 ft (30 m) Starting 2021 Model Year |
Net Power | 70 hp (52 kw) Starting 2021 Model Year |
Operating Weight | 21,091 lbs (9,567 kg) Starting 2021 Model Year |
Blades
Blade Height | 17 in (43 cm)
|
Dimensions - Long Stick
Boom In Reach | 127 in (322 cm)
|
Boom Swing - Left | 24 in (61 cm)
|
Boom Swing - Right | 37 in (94 cm)
|
Dig Depth | 183 in (465 cm)
|
Maximum Blade Depth | 27 in (68 cm)
|
Maximum Blade Height | 14 in (34 cm)
|
Maximum Dig Height | 277 in (703 cm)
|
Maximum Dump Clearance | 199 in (506 cm)
|
Maximum Reach | 301 in (764 cm)
|
Maximum Reach - Ground Level | 294 in (746 cm)
|
O/A Shipping Length | 262 in (666 cm)
|
O/A Track Width | 97 in (247 cm)
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O/A Undercarriage Length | 126 in (320 cm)
|
Stick Length | 93 in (236 cm)
|
Swing Bearing - Height | 29 in (73 cm)
|
Track Belt/Shoe Width | 18 in (45 cm)
|
Vertical Wall | 134 in (341 cm)
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Dimensions - Standard Stick
Boom In Reach | 120 in (306 cm)
|
Boom Swing - Left | 24 in (61 cm)
|
Boom Swing - Right | 37 in (94 cm)
|
Dig Depth | 162 in (411 cm)
|
Maximum Blade Depth | 27 in (68 cm)
|
Maximum Blade Height | 14 in (34 cm)
|
Maximum Dig Height | 265 in (673 cm)
|
Maximum Dump Clearance | 187 in (475 cm)
|
Maximum Reach | 281 in (714 cm)
|
Maximum Reach - Ground Level | 274 in (695 cm)
|
O/A Shipping Length | 259 in (658 cm)
|
O/A Track Width | 97 in (247 cm)
|
O/A Undercarriage Length | 126 in (320 cm)
|
Stick Length | 72 in (182 cm)
|
Swing Bearing - Height | 29 in (73 cm)
|
Track Belt/Shoe Width | 18 in (45 cm)
|
Vertical Wall | 118 in (300 cm)
|
Engine
Bore | 4 in (9 cm)
|
Displacement | 203 cu in (3,327 cu cm)
|
Engine Model | Cat C3.3B
|
Net Power | 70 hp (52 kw)
|
Stroke | 5 in (12 cm)
|
Hydraulic System
Auxiliary Circuit - Secondary - Flow | 9 gpm (34 lpm)
|
Auxiliary Circuit - Secondary - Pressure | 4134 psi
|
Digging Force - Bucket | 13,943 lbs (6,324 kg)
|
Digging Force - Stick - Long | 8,023 lbs (3,639 kg)
|
Digging Force - Stick - Standard | 9,500 lbs (4,309 kg)
|
Hydraulic System Type | Load Sensing Hydraulics with Variable Displacement Piston Pump
|
Operating Pressure - Equipment | 4134 psi
|
Operating Pressure - Swing | 3626 psi
|
Operating Pressure - Travel | 4134 psi
|
Pump Flow at 2,400 rpm | 62 gpm (235 lpm)
|
Service Refill Capacities
Cooling System | 3 gal (10 l)
|
Engine Oil | 3 gal (11 l)
|
Fuel Tank | 39 gal (148 l)
|
Hydraulic System | 28 gal (106 l)
|
Hydraulic Tank | 14 gal (53 l)
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Swing System
Machine Swing Speed | 10.6 rpm
|
Travel System
Gradeability - Maximum | 30 degrees
|
Ground Pressure - Maximum Weight | 6 psi
|
Ground Pressure - Minimum Weight | 6 psi
|
Maximum Traction Force - High Speed | 6,497 lbs (2,947 kg)
|
Maximum Traction Force - Low Speed | 19,064 lbs (8,647 kg)
|
Travel Speed - High | 3 mph (5 kph)
|
Travel Speed - Low | 2 mph (3 kph)
|
Weights
Operating Weight | 20,731 lbs (9,403 kg)
|