Mini Excavators 308 CR (Fixed Boom)

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Key Specs

Net Power: 69 hp; 51.2 kW

Operating Weight: 18659 lb; 8462 kg

Dig Depth: 185 in; 4687 mm

308 CR (Fixed Boom)
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Overview

Mini Excavators Inspired by Our Customers

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.

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

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.

Controls are easy to use and the intuitive Next Generation Monitor provides customizable machine operator preferences and easy to read machine information.

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 a button. The benefit of less effort and improved control is in your hands!

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

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.

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.

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.

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.

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)

Product Specifications for 308 CR (Fixed Boom)

Engine

Net Power	69 hp 51.2 kW
Engine Model	Cat® C2.8 Turbo Cat® C2.8 Turbo
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC	69 hp 51.2 kW
Gross Power - ISO 14396	74.3 hp 55.4 kW
Bore	3.5 in 90 mm
Stroke	4.3 in 110 mm
Displacement	171 in³ 2.8 l
Note	Meets U.S. EPA Tier 4 Final and EU Stage V emissions standards. Meets U.S. EPA Tier 4 Final and EU Stage V emissions standards.
Note (1)	Advertised power is tested per the specified standard in effect at the time of manufacture. Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (2)	Net power advertised is the power available at the flywheel when the engine is at the rated speed of 2,200 rpm and the engine is installed with the factory configured fan, air intake system, exhaust system and alternator with a minimum alternator load. Net power advertised is the power available at the flywheel when the engine is at the rated speed of 2,200 rpm and the engine is installed with the factory configured fan, air intake system, exhaust system and alternator with a minimum alternator load.

Weights

Operating Weight	18659 lb 8462 kg
Minimum Operating Weight with Cab*	16707 lb 7577 kg
Maximum Operating Weight with Cab**	18659 lb 8462 kg
Note (1)	Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket. 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. Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.

Dimensions - Long Stick

Dig Depth	185 in 4687 mm
Vertical Wall	162 in 4110 mm
Maximum Reach - Ground Level	266 in 6766 mm
Maximum Reach	272 in 6900 mm
Maximum Dig Height	307 in 7809 mm
Maximum Dump Clearance	223 in 5672 mm
Boom In Reach	89 in 2250 mm
Tail Swing with Counterweight	56 in 1425 mm
Tail Swing without Counterweight	51 in 1290 mm
Maximum Blade Height	14.6 in 370 mm
Maximum Blade Depth	16 in 407 mm
Height - Boom Transport - No Tools*	100 in 2540 mm
Height - Boom Working - With Tools**	121 in 3080 mm
Cab Height	100 in 2541 mm
Swing Bearing - Height	30 in 756 mm
O/A Undercarriage Length	113 in 2880 mm
Overall Shipping Length - with Counterweight	5800 mm (228 in)* 5800 mm (228 in)*
Overall Shipping Length - without Counterweight	5665 mm (223 in)* 5665 mm (223 in)*
Track Belt/Shoe Width	18 in 450 mm
O/A Track Width	91 in 2300 mm
Ground Clearance	14 in 350 mm
Stick Length	87 in 2208 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 (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.
Note (2)	*With blade positioned at the rear of the machine. *With blade positioned at the rear of the machine.

Dimensions - Standard Stick

Dig Depth	163 in 4145 mm
Vertical Wall	142 in 3600 mm
Maximum Reach - Ground Level	246 in 6246 mm
Maximum Reach	252 in 6391 mm
Maximum Dig Height	291 in 7392 mm
Maximum Dump Clearance	207 in 5255 mm
Boom In Reach	66 in 1681 mm
Tail Swing with Counterweight	56 in 1425 mm
Tail Swing without Counterweight	51 in 1290 mm
Maximum Blade Height	14.6 in 370 mm
Maximum Blade Depth	16 in 407 mm
Height - Boom Transport - No Tools*	97 in 2466 mm
Height - Boom Working - With Tools**	105 in 2671 mm
Cab Height	100 in 2541 mm
Swing Bearing - Height	30 in 756 mm
O/A Undercarriage Length	113 in 2880 mm
Overall Shipping Length - with Counterweight	228 in 5780 mm
Overall Shipping Length - without Counterweight	222 in 5645 mm
Track Belt/Shoe Width	18 in 450 mm
O/A Track Width	91 in 2300 mm
Ground Clearance	14 in 350 mm
Stick Length	66 in 1665 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 (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.
Note (2)	*With blade positioned at the rear of the machine. *With blade positioned at the rear of the machine.

Weight Increase from Minimum Configuration

Counterweight	551 lb 250 kg
Long Stick	187 lb 85 kg
Steel Tracks with Pads	662 lb 300 kg

Travel System

Travel Speed - High	3 mile/h 4.9 km/h
Travel Speed - Low	1.8 mile/h 3 km/h
Maximum Traction Force - High Speed	6587 lb 29.3 kN
Maximum Traction Force - Low Speed	15962 lb 71 kN
Ground Pressure - Minimum Weight	4.8 psi 33.2 kPa
Ground Pressure - Maximum Weight	5.4 psi 37.9 kPa
Gradeability - Maximum	30 degrees 30 degrees

Service Refill Capacities

Cooling System	2.6 gal (US) 10 l
Engine Oil	2.3 gal (US) 8.8 l
Fuel Tank	38 gal (US) 145 l
Hydraulic Tank	14 gal (US) 53 l
Hydraulic System	29 gal (US) 110 l

Hydraulic System

Type	Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump
Pump Flow at 2,400 rpm	44 gpm 167 L/min
Operating Pressure - Equipment	4134 psi 285 bar
Operating Pressure - Travel	4134 psi 285 bar
Operating Pressure - Swing	3626 psi 250 bar
Maximum Auxiliary Circuit - Primary - Flow at Pump	35 gpm 131 L/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump	4134 psi 285 bar
Maximum Auxiliary Circuit - Secondary - Flow at Pump	9 gpm 33 L/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump	4134 psi 285 bar
Digging Force - Stick - Standard	9285 lb 41.3 kN
Digging Force - Stick - Long	8250 lb 36.7 kN
Digging Force - Bucket	13241 lb 58.9 kN
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.

Swing System

Machine Swing Speed

10 r/min 10 r/min

Blade

Width - Standard	90.6 in 2300 mm
Width - Wide	96.5 in 2450 mm
Height	17 in 431 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)

Air Conditioning System

Air Conditioning

The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe). The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).

Sound

Operator Sound Pressure (ISO 6396:2008)	72 dB(A) 72 dB(A)
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"

Sustainability

Recyclability

96% 96%