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308 CR (Fixed Boom) Mini Hydraulic Excavator
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 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!
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.
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.
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 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)
| Engine | |
|---|---|
| Net Power | 51.2 kW (69 hp) |
| Engine Model | Cat® C2.8 Turbo |
| Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC | 51.2 kW (69 hp) |
| Gross Power - ISO 14396 | 55.4 kW (74.3 hp) |
| Bore | 90 mm (3.5 in) |
| Stroke | 110 mm (4.3 in) |
| Displacement | 2.8 l (171 inu00b3) |
| 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 | 8462 kg (18659 lb) |
| Minimum Operating Weight with Cab* | 7577 kg (16707 lb) |
| Maximum Operating Weight with Cab** | 8462 kg (18659 lb) |
| 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 | 250 kg (551 lb) |
| Long Stick | 85 kg (187 lb) |
| Steel Tracks with Pads | 300 kg (662 lb) |
| Travel System | |
|---|---|
| Travel Speed - High | 4.9 km/h (3 mile/h) |
| Travel Speed - Low | 3 km/h (1.8 mile/h) |
| Maximum Traction Force - High Speed | 29.3 kN (6587 lb) |
| Maximum Traction Force - Low Speed | 71 kN (15962 lb) |
| Ground Pressure - Minimum Weight | 33.2 kPa (4.8 psi) |
| Ground Pressure - Maximum Weight | 37.9 kPa (5.4 psi) |
| Gradeability - Maximum | 30 degrees |
| Service Refill Capacities | |
|---|---|
| Cooling System | 10 l (2.6 gal (US)) |
| Engine Oil | 8.8 l (2.3 gal (US)) |
| Fuel Tank | 145 l (38 gal (US)) |
| Hydraulic Tank | 53 l (14 gal (US)) |
| Hydraulic System | 110 l (29 gal (US)) |
| Hydraulic System | |
|---|---|
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Pump Flow at 2,400 rpm | 167 L/min (44 gpm) |
| Operating Pressure - Equipment | 285 bar (4134 psi) |
| Operating Pressure - Travel | 285 bar (4134 psi) |
| Operating Pressure - Swing | 250 bar (3626 psi) |
| Maximum Auxiliary Circuit - Primary - Flow at Pump | 131 L/min (35 gpm) |
| Maximum Auxiliary Circuit - Primary - Pressure at Pump | 285 bar (4134 psi) |
| Maximum Auxiliary Circuit - Secondary - Flow at Pump | 33 L/min (9 gpm) |
| Maximum Auxiliary Circuit - Secondary - Pressure at Pump | 285 bar (4134 psi) |
| Digging Force - Stick - Standard | 41.3 kN (9285 lb) |
| Digging Force - Stick - Long | 36.7 kN (8250 lb) |
| Digging Force - Bucket | 58.9 kN (13241 lb) |
| Note | 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 | 2300 mm (90.6 in) |
| Width - Wide | 2450 mm (96.5 in) |
| Height | 431 mm (17 in) |
| Certification - Cab | |
|---|---|
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 |
| Top Guard | ISO 10262:1998 (Level I) |
| Dimensions - Standard Stick | |
|---|---|
| Dig Depth | 4145 mm (163 in) |
| Vertical Wall | 3600 mm (142 in) |
| Maximum Reach - Ground Level | 6246 mm (246 in) |
| Maximum Reach | 6391 mm (252 in) |
| Maximum Dig Height | 7392 mm (291 in) |
| Maximum Dump Clearance | 5255 mm (207 in) |
| Boom In Reach | 1681 mm (66 in) |
| Tail Swing with Counterweight | 1425 mm (56 in) |
| Tail Swing without Counterweight | 1290 mm (51 in) |
| Maximum Blade Height | 370 mm (14.6 in) |
| Maximum Blade Depth | 407 mm (16 in) |
| Height - Boom Transport - No Tools* | 2466 mm (97 in) |
| Height - Boom Working - With Tools** | 2671 mm (105 in) |
| Cab Height | 2541 mm (100 in) |
| Swing Bearing - Height | 756 mm (30 in) |
| O/A Undercarriage Length | 2880 mm (113 in) |
| Overall Shipping Length - with Counterweight | 5780 mm (228 in) |
| Overall Shipping Length - without Counterweight | 5645 mm (222 in) |
| Track Belt/Shoe Width | 450 mm (18 in) |
| O/A Track Width | 2300 mm (91 in) |
| Ground Clearance | 350 mm (14 in) |
| Stick Length | 1665 mm (66 in) |
| 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 | 4687 mm (185 in) |
| Vertical Wall | 4110 mm (162 in) |
| Maximum Reach - Ground Level | 6766 mm (266 in) |
| Maximum Reach | 6900 mm (272 in) |
| Maximum Dig Height | 7809 mm (307 in) |
| Maximum Dump Clearance | 5672 mm (223 in) |
| Boom In Reach | 2250 mm (89 in) |
| Tail Swing with Counterweight | 1425 mm (56 in) |
| Tail Swing without Counterweight | 1290 mm (51 in) |
| Maximum Blade Height | 370 mm (14.6 in) |
| Maximum Blade Depth | 407 mm (16 in) |
| Height - Boom Transport - No Tools* | 2540 mm (100 in) |
| Height - Boom Working - With Tools** | 3080 mm (121 in) |
| Cab Height | 2541 mm (100 in) |
| Swing Bearing - Height | 756 mm (30 in) |
| O/A Undercarriage Length | 2880 mm (113 in) |
| Overall Shipping Length - with Counterweight | 5800 mm (228 in)*** |
| Overall Shipping Length - without Counterweight | 5665 mm (223 in)*** |
| Track Belt/Shoe Width | 450 mm (18 in) |
| O/A Track Width | 2300 mm (91 in) |
| Ground Clearance | 350 mm (14 in) |
| Stick Length | 2208 mm (87 in) |
| 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). |
| 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" |
| Sustainability | |
|---|---|
| Recyclability | 96% |