Back to listing page

308 CR (Fixed Boom)

Mini Excavators

The Cat® 308 CR Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications.

Show

Net Power 51.8 kW

Displacement 3.33 l

Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC 51.8 kW

Bore 94 mm

Availability

Please Call Admin

Request A Quote Download Brochure

308 CR (Fixed Boom)

Request A Quote

OVERVIEW

Mini Excavators Inspired by Our Customers

FEATURES & BENEFITS

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 d... Read more

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. Read more

STICK STEER TRAVEL MODE

Moving around the job site is even easier with Cat Stick Steer. Easily switch from traditional travel controls with levers and pedals to joystick controls with a push of... Read more

BIG PERFORMANCE IN A MINI DESIGN

Increased lifting, swinging, travel and multi-functioning performance help you get the job done more efficiently, and blade float allows for easy clean up. Read more

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... Read more

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. Read more

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 reduc... Read more

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 rea... Read more

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... Read more

SPECIFICATIONS FOR 308 CR (Fixed Boom)

Collapse All

Engine

Net Power	51.8 kW
Displacement	3.33 l
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC	51.8 kW
Bore	94 mm
Stroke	120 mm
Engine Model - U.S. EPA Tier 4 Final/EU Stage V	Cat® C3.3B
Gross Power - SAE J1995:2014	55.4 kW

Weights

Operating Weight	8025 kg
Minimum Operating Weight with Cab*	7330 kg
Maximum Operating Weight with Cab**	8025 kg
Note (1)	*Minimum Weight is based on rubber 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.

Weight Increase from Minimum Configuration

Steel Tracks with Pads	300 kg
Long Stick	85 kg
Counterweight	250 kg

Travel System

Ground Pressure - Maximum Weight	35 kPa
Travel Speed - Low	3 km/h
Travel Speed - High	4.9 km/h
Maximum Traction Force - Low Speed	71 kN
Ground Pressure - Minimum Weight	32.1 kPa
Maximum Traction Force - High Speed	29.3 kN
Gradeability - Maximum	30 degrees

Service Refill Capacities

Engine Oil	11.2 l
Cooling System	10 l
Hydraulic Tank	53 l
Hydraulic System	110 l
Fuel Tank	145 l

Hydraulic System

Digging Force - Stick - Long	36.7 kN
Operating Pressure - Swing	250 bar
Maximum Auxiliary Circuit - Secondary - Pressure at Pump	285 bar
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard	41.3 kN
Maximum Auxiliary Circuit - Primary - Pressure at Pump	285 bar
Maximum Auxiliary Circuit - Primary - Flow at Pump	131 l/min
Operating Pressure - Equipment	285 bar
Pump Flow at 2,400 rpm	167 l/min
Maximum Auxiliary Circuit - Secondary - Flow at Pump	33 l/min
Operating Pressure - Travel	285 bar
Note	Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Digging Force - Bucket	58.9 kN

Swing System

Machine Swing Speed

10.6 r/min

Blade

Height	431 mm
Width - Standard	2300 mm
Width - Wide	2450 mm

Certification - Cab

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

Sound

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

Dimensions - Standard Stick

Swing Bearing - Height	756 mm
Height - Boom Working - With Tools**	2671 mm
Ground Clearance	350 mm
Boom In Reach	1681 mm
O/A Track Width	2300 mm
Height - Boom Transport - No Tools*	2466 mm
Maximum Dig Height	7392 mm
Note (2)	**Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Maximum Reach	6391 mm
Tail Swing with Counterweight	1425 mm
Maximum Blade Height	370 mm
Vertical Wall	3600 mm
Dig Depth	4145 mm
Overall Shipping Length - with Counterweight	5780 mm
Note (1)	*Boom Height when stick is pinned in transport position with no attachments.
Maximum Blade Depth	407 mm
Tail Swing without Counterweight	1290 mm
Overall Shipping Length - without Counterweight	5645 mm
Cab Height	2541 mm
Maximum Reach - Ground Level	6246 mm
Maximum Dump Clearance	5255 mm
Track Belt/Shoe Width	450 mm
Stick Length	1665 mm
O/A Undercarriage Length	2880 mm

Dimensions - Long Stick

Dig Depth	4687 mm
Stick Length	2208 mm
O/A Track Width	2300 mm
Maximum Blade Depth	407 mm
O/A Undercarriage Length	2880 mm
Overall Shipping Length - without Counterweight	5665 mm (223 in)***
Maximum Blade Height	370 mm
Cab Height	2541 mm
Maximum Dump Clearance	5672 mm
Height - Boom Transport - No Tools*	2540 mm
Overall Shipping Length - with Counterweight	5800 mm (228 in)***
Ground Clearance	350 mm
Boom In Reach	2250 mm
Tail Swing with Counterweight	1425 mm
Maximum Dig Height	7809 mm
Note	*Boom Height when stick is pinned in transport position with no attachments.
Maximum Reach	6900 mm
Height - Boom Working - With Tools**	3080 mm
Swing Bearing - Height	756 mm
Vertical Wall	4110 mm
Maximum Reach - Ground Level	6766 mm
Note (2)	***With blade positioned at the rear of the machine.
Track Belt/Shoe Width	450 mm
Tail Swing without Counterweight	1290 mm
Note (1)	**Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.

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.