Cat 309 CR

Mini Excavators

About the Cat 309 CR

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.

Specifications

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

Engine

Net Power	69.5 HP
Engine Model	Cat C3.3B
Displacement	203 in³
Bore	3.7 in
Stroke	4.7 in
Gross Power - SAE J1995	74.3 HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269	69.5 HP

Weights

Operating Weight	21091 lb
Maximum Operating Weight with Cab**	21091 lb
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*	19735 lb

Weight Increase from Minimum Configuration

Steel Tracks with Pads	728 lb
Long Stick	146 lb
Counterweight	552 lb

Travel System

Gradeability - Maximum	30 degrees
Ground Pressure - Minimum Weight	5 psi
Ground Pressure - Maximum Weight	5.4 psi
Travel Speed - High	3.1 mile/h
Travel Speed - Low	1.6 mile/h
Maximum Traction Force - High Speed	6497 lb
Maximum Traction Force - Low Speed	19064 lb

Service Refill Capacities

Engine Oil	3 gal (US)
Fuel Tank	39 gal (US)
Hydraulic System	29 gal (US)
Cooling System	2.6 gal (US)
Hydraulic Tank	14 gal (US)

Hydraulic System

Type	Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing	3626 psi
Digging Force - Stick - Standard	9500 lb
Digging Force - Stick - Long	8023 lb
Operating Pressure - Travel	4134 psi
Pump Flow at 2,400 rpm	62 gal/min
Digging Force - Bucket	13943 lb
Operating Pressure - Equipment	4134 psi
Note	Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump	9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump	4134 psi
Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump	37 gal/min
Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump	4134 psi

Swing System

Machine Swing Speed	10.6 r/min
Boom Swing - Right	50 degrees
Boom Swing - Left	60 degrees

Blade

Height	17 in
Width - Wide	104 in
Width - Standard	97 in

Certification - Cab

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

Sound

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

Dimensions - Standard Stick

Boom Swing - Right	36.8 in
Maximum Dump Clearance	187.4 in
Tail Swing without Counterweight	57.1 in
Maximum Reach - Ground Level	273.6 in
O/A Undercarriage Length	126 in
Cab Height	100 in
Swing Bearing - Height	29.7 in
Maximum Dig Height	265.2 in
Track Belt/Shoe Width	17.7 in
O/A Track Width	97.2 in
Ground Clearance	14 in
Maximum Reach	281.1 in
Tail Swing with Counterweight	62.4 in
Boom In Reach	120.4 in
Vertical Wall	117.8 in
Dig Depth	161.7 in
Stick Length	71.8 in
Boom Swing - Left	23.8 in
Maximum Blade Height	16.1 in
Maximum Blade Depth	26 in
Note	*Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight	266.7 in
Overall Shipping Length - with Counterweight	266.7 in
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.
Height - Boom Transport - No Tools*	95.7 in
Height - Boom Working - With Tools**	104.7 in

Dimensions - Long Stick

Dig Depth	182.8 in
Maximum Dump Clearance	199.7 in
Boom In Reach	126.6 in
Vertical Wall	134 in
Maximum Blade Depth	26 in
O/A Undercarriage Length	126 in
O/A Track Width	97.2 in
Stick Length	92.8 in
Maximum Blade Height	16.1 in
Maximum Dig Height	277.1 in
Tail Swing with Counterweight	62.4 in
Maximum Reach	300.7 in
Cab Height	100 in
Ground Clearance	14 in
Swing Bearing - Height	29.7 in
Track Belt/Shoe Width	17.7 in
Boom Swing - Left	23.8 in
Boom Swing - Right	36.8 in
Tail Swing without Counterweight	57.1 in
Maximum Reach - Ground Level	293.7 in
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.
Height - Boom Transport - No Tools*	89 in
Overall Shipping Length - with Counterweight	7052 mm (277.6 in)***
Height - Boom Working - With Tools**	120.1 in
Overall Shipping Length - without Counterweight	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 1.0 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.

Features

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, and blade float allows for easy clean up.

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.