309 CR Mini Excavator | Cat

Specifications

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.

Engine

Engine Model	Cat C3.3B Cat C3.3B
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

Weights

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

Weight Increase from Minimum Configuration

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

Travel System

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

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 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

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

Height	17 in 431 mm
Width - Wide	104 in 2640 mm
Width - Standard	97 in 2470 mm

Certification - Cab

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

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 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

Dimensions - Long Stick

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)*

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.