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Key Specs
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.
Cat Exclusives in a Mini Excavator
with improved fuel efficiency and longer service intervals
with customizable operator settings and improvements in lift, swing, travel and multifunction
| Net Power | 69.5 HP 51.8 kW |
| Displacement | 203 in³ 3.33 l |
| Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC | 69.5 HP 51.8 kW |
| Bore | 3.7 in 94 mm |
| Stroke | 4.7 in 120 mm |
| Engine Model - U.S. EPA Tier 4 Final/EU Stage V | Cat® C3.3B Cat® C3.3B |
| Gross Power - SAE J1995:2014 | 74.3 HP 55.4 kW |
| Operating Weight | 17695 lb 8025 kg |
| Minimum Operating Weight with Cab* | 16163 lb 7330 kg |
| Maximum Operating Weight with Cab** | 17695 lb 8025 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. |
| Steel Tracks with Pads | 662 lb 300 kg |
| Long Stick | 187 lb 85 kg |
| Counterweight | 551 lb 250 kg |
| Ground Pressure - Maximum Weight | 5.1 psi 35 kPa |
| Travel Speed - Low | 1.8 mile/h 3 km/h |
| Travel Speed - High | 3 mile/h 4.9 km/h |
| Maximum Traction Force - Low Speed | 15962 lb 71 kN |
| Ground Pressure - Minimum Weight | 4.7 psi 32.1 kPa |
| Maximum Traction Force - High Speed | 6587 lb 29.3 kN |
| Gradeability - Maximum | 30 degrees 30 degrees |
| Engine Oil | 3 gal (US) 11.2 l |
| Cooling System | 2.6 gal (US) 10 l |
| Hydraulic Tank | 14 gal (US) 53 l |
| Hydraulic System | 29 gal (US) 110 l |
| Fuel Tank | 38 gal (US) 145 l |
| Digging Force - Stick - Long | 8250 lb 36.7 kN |
| Operating Pressure - Swing | 3626 psi 250 bar |
| Maximum Auxiliary Circuit - Secondary - Pressure at Pump | 4134 psi 285 bar |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Digging Force - Stick - Standard | 9285 lb 41.3 kN |
| Maximum Auxiliary Circuit - Primary - Pressure at Pump | 4134 psi 285 bar |
| Maximum Auxiliary Circuit - Primary - Flow at Pump | 35 gal/min 131 l/min |
| Operating Pressure - Equipment | 4134 psi 285 bar |
| Pump Flow at 2,400 rpm | 44 gal/min 167 l/min |
| Maximum Auxiliary Circuit - Secondary - Flow at Pump | 9 gal/min 33 l/min |
| Operating Pressure - Travel | 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. |
| Digging Force - Bucket | 13241 lb 58.9 kN |
| Machine Swing Speed | 10.6 r/min 10.6 r/min |
| Height | 17 in 431 mm |
| Width - Standard | 90.6 in 2300 mm |
| Width - Wide | 96.5 in 2450 mm |
| Top Guard | ISO 10262:1998 (Level I) ISO 10262:1998 (Level I) |
| Tip Over Protective Structure (TOPS) | ISO 12117:1997 ISO 12117:1997 |
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 ISO 12117-2:2008 |
| Average Exterior Sound Pressure (ISO 6395:2008) | 99 dB(A) 99 dB(A) |
| Operator Sound Pressure (ISO 6396:2008) | 72 dB(A) 72 dB(A) |
| Note | European Union Directive "2000/14/EC" European Union Directive "2000/14/EC" |
| Swing Bearing - Height | 30 in 756 mm |
| Height - Boom Working - With Tools** | 105 in 2671 mm |
| Ground Clearance | 14 in 350 mm |
| Boom In Reach | 66 in 1681 mm |
| O/A Track Width | 91 in 2300 mm |
| Height - Boom Transport - No Tools* | 97 in 2466 mm |
| Maximum Dig Height | 291 in 7392 mm |
| Note (2) | **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. |
| Maximum Reach | 252 in 6391 mm |
| Tail Swing with Counterweight | 56 in 1425 mm |
| Maximum Blade Height | 14.6 in 370 mm |
| Vertical Wall | 142 in 3600 mm |
| Dig Depth | 163 in 4145 mm |
| Overall Shipping Length - with Counterweight | 228 in 5780 mm |
| Note (1) | *Boom Height when stick is pinned in transport position with no attachments. *Boom Height when stick is pinned in transport position with no attachments. |
| Maximum Blade Depth | 16 in 407 mm |
| Tail Swing without Counterweight | 51 in 1290 mm |
| Overall Shipping Length - without Counterweight | 222 in 5645 mm |
| Cab Height | 100 in 2541 mm |
| Maximum Reach - Ground Level | 246 in 6246 mm |
| Maximum Dump Clearance | 207 in 5255 mm |
| Track Belt/Shoe Width | 18 in 450 mm |
| Stick Length | 66 in 1665 mm |
| O/A Undercarriage Length | 113 in 2880 mm |
| Dig Depth | 185 in 4687 mm |
| Stick Length | 87 in 2208 mm |
| O/A Track Width | 91 in 2300 mm |
| Maximum Blade Depth | 16 in 407 mm |
| O/A Undercarriage Length | 113 in 2880 mm |
| Overall Shipping Length - without Counterweight | 5665 mm (223 in)*** 5665 mm (223 in)*** |
| Maximum Blade Height | 14.6 in 370 mm |
| Cab Height | 100 in 2541 mm |
| Maximum Dump Clearance | 223 in 5672 mm |
| Height - Boom Transport - No Tools* | 100 in 2540 mm |
| Overall Shipping Length - with Counterweight | 5800 mm (228 in)*** 5800 mm (228 in)*** |
| Ground Clearance | 14 in 350 mm |
| Boom In Reach | 89 in 2250 mm |
| Tail Swing with Counterweight | 56 in 1425 mm |
| Maximum Dig Height | 307 in 7809 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. |
| Maximum Reach | 272 in 6900 mm |
| Height - Boom Working - With Tools** | 121 in 3080 mm |
| Swing Bearing - Height | 30 in 756 mm |
| Vertical Wall | 162 in 4110 mm |
| Maximum Reach - Ground Level | 266 in 6766 mm |
| Note (2) | ***With blade positioned at the rear of the machine. ***With blade positioned at the rear of the machine. |
| Track Belt/Shoe Width | 18 in 450 mm |
| Tail Swing without Counterweight | 51 in 1290 mm |
| 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. |
| 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. |
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