308 CR (Fixed Boom)

Net Power: 69 hp / 51.2 kW
Operating Weight: 18659 lb / 8462 kg
Dig Depth: 185 in / 4687 mm

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.

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308 CR (Fixed Boom) Mini Excavator Product Brochure Cat Mini Hydraulic Excavators Product Line Brochure (North America) Cat Mini Hydraulic Excavators Product Line Brochure (Europe) Options And Accessories Kit Guide for Mini Hydraulic Excavators Cat Attachments for Mini Excavators Brochure Attachment Compatibility Guide for Mini Excavators

Specifications
Related Products

Engine
Net Power	69 hp / 51.2 kW
Engine Model	Cat® C2.8 Turbo
Net Power - 2,400 rpm - ISO 9249, 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.
Note (1)	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 2,400 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.
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
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 lbf / 29.3 kN
Maximum Traction Force - Low Speed	15962 lbf / 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

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
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 lbf / 41.3 kN
Digging Force - Stick - Long	8250 lbf / 36.7 kN
Digging Force - Bucket	13241 lbf / 58.9 kN
Note	Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Swing System
Machine Swing Speed	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
Top Guard	ISO 10262:1998 (Level I)

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.
Note (1)	**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.

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)***
Overall Shipping Length - without Counterweight	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.
Note (1)	**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.

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 1.0 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).

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 1.0 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)
Average Exterior Sound Pressure (ISO 6395:2008)	99 dB(A)
Note	European Union Directive "2000/14/EC"

Sustainability
Recyclability	96%

Flail Mowers

Flail Mowers are ideal for efficient cutting and mulching of vegetation and overgrowth.

Model	Working Width	Required Hydraulics	Overall Width
HMF210	39.4 in / 1000 mm	Standard Flow	46.6 in / 1184 mm

Contractors' Grapples

Contractors’ Grapples are a proven product built for your high-volume material handling needs. Designed for long-lasting durability, Contractors’ Grapples are made to help you in the toughest of applications.

Model	Machine Class	Jaw Opening	Weight
G108 Stiff link	7-9 Ton Mini Excavators	69.5 in / 1765 mm	815.7 lb / 370 kg

Demolition and Sorting Grapples

Cat® Demolition & Sorting Grapples are designed for fast, productive material handling. Capable of high-volume, production loading and precise sorting, they enhance the productivity and efficiency of your operation. The grapples can handle anything from primary and secondary demolition to recycling to get the job done.

Model	Grapple Area	Weight	Machine Class
G308	8.5 ft³ / 240 l	1084.7 lb / 492 kg	7-10 Ton Mini Excavators

Heavy Duty Buckets - Mini Excavator

High strength buckets designed for maximum performance and value over a broad range of applications.

Model	Width	Capacity	Weight
330 mm (13 in), 99 L (3.5 ft3), Pin On, 50 mm (2 in)	13 in / 330 mm	3.5 ft³ / 99.09 l	299.8 lb / 136 kg
457 mm (18 in), 150 L (5.3 ft3), Pin On, 50 mm (2 in)	18 in / 457 mm	5.3 ft³ / 150.1 l	332.9 lb / 151 kg
610 mm (24 in), 229 L (8.1 ft3), Pin On, 50 mm (2 in)	24 in / 610 mm	8.1 ft³ / 229.39 l	392.4 lb / 178 kg
762 mm (30 in), 309 L (10.9 ft3), Pin On, 50 mm (2 in)	30 in / 762 mm	10.9 ft³ / 308.7 l	456.4 lb / 207 kg
914 mm (36 in), 388 L (13.7 ft3), Pin On, 50 mm (2 in)	36 in / 914 mm	13.7 ft³ / 387.89 l	507.1 lb / 230 kg

Augers

Designed to drill holes for footings, fencing, signs and trees.

Model	Drive Shaft Torque at Maximum Pressure	Drive Method	Mounting Bracket Design
A68, 5 Ton Mini Excavators	5034.6 lb/ft / 6826 N·m	Gerotor Motor - Double Planetary Reduction	8 Ton Mini Excavator Pin On

Ditch Cleaning Buckets - Mini Excavator

Used in ditch cleaning, sloping, grading and other finishing work.

Model	Width	Weight	Tip Radius
1219 mm (48 in), 329 L (11.6 ft3), Pin On	48 in / 1219 mm	477.1 lb / 216.39 kg	31.3 in / 795 mm
1372 mm (54 in), 375 L (13.2 ft3), Pin On	54 in / 1372 mm	517 lb / 234.5 kg	31.3 in / 795 mm
1524 mm (60 in), 420 L (14.8 ft3), Pin On	60 in / 1524 mm	557.1 lb / 252.69 kg	31.3 in / 795 mm

Mulchers

High-performance cutting and mulching of vegetation and overgrowth.

Model	Overall Width	Working Width	Length
HM208	40.4 in / 1026 mm	32.2 in / 818 mm	28.1 in / 714 mm
HM210	48.3 in / 1226 mm	39.8 in / 1012 mm	28.1 in / 714 mm

Grading Buckets - Mini Excavator

For cleaning ditches, sloping, grading and other finishing work.

Model	Width	Capacity	Weight
1200 mm (47 in)	47.2 in / 1200 mm	14.5 ft³ / 410.6 l	615.3 lb / 279.1 kg
1500 mm (59 in)	59.1 in / 1500 mm	18.4 ft³ / 521 l	761.9 lb / 345.6 kg

Heavy Duty Rock Buckets - Mini Excavator

Used for aggressive bucket loading in highly abrasive applications such as severe rock.

Model	Width	Capacity	Weight
610 mm (24 in)	24 in / 610 mm	8.1 ft³ / 229.39 l	427.7 lb / 194 kg
762 mm (30 in)	30 in / 762 mm	10.9 yd³ / 308.7 m³	491.6 lb / 223 kg

Dual Lock™ Pin Grabber Couplers - Mini Excavator

Increase machine versatility and improve overall production.

Model	Weight	Width	Length
8 Ton Mini Excavators Hydraulic	211.6 lb / 96 kg	14.6 in / 370 mm	23.4 in / 595 mm

Tiltrotators

Helps you get the job done faster with the quality you expect from Cat products. Integrated to your excavator, Tiltrotators are productive, easy-to-use, and add value to your operation. Tiltrotators are a versatile solution providing enhancements to your operation.

Model	Machine Class	Weight	Interface Options: Top-Bottom
TRS8, Pin On (Pin Grabber)/Pin Grabber, 7-9 Ton Mini Excavators	7-9 Ton Mini Excavators	694.5 lb / 315 kg	Pin On (Pin Grabber) Coupler / Pin Grabber Coupler
TRS8, Pin On (Pin Grabber)/S50, 7-9 Ton Mini Excavators	7-9 Ton Mini Excavators	674.6 lb / 306 kg	Pin On (Pin Grabber) Coupler / S50 Coupler

Heavy Duty Buckets

Ideal for semi-rocky soil or where hard bank material must be broken out and removed.

Model	Width	Capacity	Weight
300 mm (12 in), 96 L (3.4 ft3), Pin Lock, Weld-On Adapters	11.8 in / 300 mm	3.4 ft³ / 96 l	249.1 lb / 113 kg
406 mm (16 in), 120 L (4.2 ft3), Pin Lock, Weld-On Adapters	16 in / 406 mm	4.2 ft³ / 120 l	297.6 lb / 135 kg
457 mm (18 in), 139 L (4.9 ft3), Pin Lock, Weld-On Adapters	18 in / 457 mm	4.9 ft³ / 139 l	304.2 lb / 138 kg
610 mm (24 in), 207 L (7.3 ft3), Pin Lock, Weld-On Adapters	24 in / 610 mm	7.3 ft³ / 207 l	370.4 lb / 168 kg
762 mm (30 in), 280 L (9.9 ft3), Pin Lock, Weld-On Adapters	30 in / 762 mm	9.9 ft³ / 280 l	443.1 lb / 201 kg
914 mm (36 in), 340 L (12 ft3), Pin Lock, Weld-On Adapters	36 in / 914 mm	12 ft³ / 340 l	509.3 lb / 231 kg

High Capacity Buckets

Ideal for work in lower density soils and light materials.

Model	Width	Capacity	Weight
406 mm (16 in), 160 L (5.7 ft3), Pin Lock, Weld-On Adapters	16 in / 406 mm	5.7 ft³ / 160 l	337.3 lb / 153 kg
457 mm (18 in), 180 L (6.4 ft3), Pin Lock, Weld-On Adapters	18 in / 457 mm	6.4 ft³ / 180 l	357.1 lb / 162 kg
610 mm (24 in), 260 L (9.2 ft3), Pin Lock, Weld-On Adapters	24 in / 610 mm	9.2 ft³ / 260 l	427.7 lb / 194 kg
762 mm (30 in), 360 L (12.7 ft3), Pin Lock, Weld-On Adapters	30 in / 762 mm	12.7 ft³ / 360 l	489.4 lb / 222 kg
914 mm (36 in), 460 L (16.2 ft3), Pin Lock, Weld-On Adapters	36 in / 914 mm	16.2 ft³ / 460 l	560 lb / 254 kg

Mobile Scrap & Demolition Shears

Cat® Scrap and Demolition Shears are industry leaders in steel processing. Power and performance in a reliable package, backed by the best dealer network in the world.

Model	Tip Force	Rotation	Jaw Opening
S308	43.3 Sh Ton / 385 kN	360 Degrees	9.4 in / 240 mm

Multi-Purpose Grapples

Works best in material handling applications where irregular surface materials are used.

Model	Grapple Area	Weight	Machine Class
G208	2.8 ft² / 0.26 m²	619.5 lb / 281 kg	7-10 Ton Mini Excavators