US
Metric

Overview

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.

Engine

Net Power
69.00 hp
51.20 kW
Engine Model
Cat® C2.8 Turbo
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC
69.00 hp
51.20 kW
Gross Power - ISO 14396
74.30 hp
55.40 kW
Bore
3.50 in
90.00 mm
Stroke
4.30 in
110.00 mm
Displacement
171.00 in³
2.80 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
18659.00 lb
8462.00 kg
Minimum Operating Weight with Cab*
16707.00 lb
7577.00 kg
Maximum Operating Weight with Cab**
18659.00 lb
8462.00 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
551.00 lb
250.00 kg
Long Stick
187.00 lb
85.00 kg
Steel Tracks with Pads
662.00 lb
300.00 kg

Travel System

Travel Speed - High
3.00 mile/h
4.90 km/h
Travel Speed - Low
1.80 mile/h
3.00 km/h
Maximum Traction Force - High Speed
6587.00 lb
29.30 kN
Maximum Traction Force - Low Speed
15962.00 lb
71.00 kN
Ground Pressure - Minimum Weight
4.80 psi
33.20 kPa
Ground Pressure - Maximum Weight
5.40 psi
37.90 kPa
Gradeability - Maximum
30 degrees

Service Refill Capacities

Cooling System
2.60 gal (US)
10.00 l
Engine Oil
2.30 gal (US)
8.80 l
Fuel Tank
38.00 gal (US)
145.00 l
Hydraulic Tank
14.00 gal (US)
53.00 l
Hydraulic System
29.00 gal (US)
110.00 l

Hydraulic System

Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Pump Flow at 2,400 rpm
44.00 gpm
167.00 L/min
Operating Pressure - Equipment
4134.00 psi
285.00 bar
Operating Pressure - Travel
4134.00 psi
285.00 bar
Operating Pressure - Swing
3626.00 psi
250.00 bar
Maximum Auxiliary Circuit - Primary - Flow at Pump
35.00 gpm
131.00 L/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump
4134.00 psi
285.00 bar
Maximum Auxiliary Circuit - Secondary - Flow at Pump
9.00 gpm
33.00 L/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
4134.00 psi
285.00 bar
Digging Force - Stick - Standard
9285.00 lb
41.30 kN
Digging Force - Stick - Long
8250.00 lb
36.70 kN
Digging Force - Bucket
13241.00 lb
58.90 kN
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Swing System

Machine Swing Speed
10.00 r/min
10.00 r/min

Blade

Width - Standard
90.60 in
2300.00 mm
Width - Wide
96.50 in
2450.00 mm
Height
17.00 in
431.00 mm

Certification - Cab

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

Dimensions - Standard Stick

Dig Depth
163.00 in
4145.00 mm
Vertical Wall
142.00 in
3600.00 mm
Maximum Reach - Ground Level
246.00 in
6246.00 mm
Maximum Reach
252.00 in
6391.00 mm
Maximum Dig Height
291.00 in
7392.00 mm
Maximum Dump Clearance
207.00 in
5255.00 mm
Boom In Reach
66.00 in
1681.00 mm
Tail Swing with Counterweight
56.00 in
1425.00 mm
Tail Swing without Counterweight
51.00 in
1290.00 mm
Maximum Blade Height
14.60 in
370.00 mm
Maximum Blade Depth
16.00 in
407.00 mm
Height - Boom Transport - No Tools*
97.00 in
2466.00 mm
Height - Boom Working - With Tools**
105.00 in
2671.00 mm
Cab Height
100.00 in
2541.00 mm
Swing Bearing - Height
30.00 in
756.00 mm
O/A Undercarriage Length
113.00 in
2880.00 mm
Overall Shipping Length - with Counterweight
228.00 in
5780.00 mm
Overall Shipping Length - without Counterweight
222.00 in
5645.00 mm
Track Belt/Shoe Width
18.00 in
450.00 mm
O/A Track Width
91.00 in
2300.00 mm
Ground Clearance
14.00 in
350.00 mm
Stick Length
66.00 in
1665.00 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
185.00 in
4687.00 mm
Vertical Wall
162.00 in
4110.00 mm
Maximum Reach - Ground Level
266.00 in
6766.00 mm
Maximum Reach
272.00 in
6900.00 mm
Maximum Dig Height
307.00 in
7809.00 mm
Maximum Dump Clearance
223.00 in
5672.00 mm
Boom In Reach
89.00 in
2250.00 mm
Tail Swing with Counterweight
56.00 in
1425.00 mm
Tail Swing without Counterweight
51.00 in
1290.00 mm
Maximum Blade Height
14.60 in
370.00 mm
Maximum Blade Depth
16.00 in
407.00 mm
Height - Boom Transport - No Tools*
100.00 in
2540.00 mm
Height - Boom Working - With Tools**
121.00 in
3080.00 mm
Cab Height
100.00 in
2541.00 mm
Swing Bearing - Height
30.00 in
756.00 mm
O/A Undercarriage Length
113.00 in
2880.00 mm
Overall Shipping Length - with Counterweight
5800 mm (228 in)***
Overall Shipping Length - without Counterweight
5665 mm (223 in)***
Track Belt/Shoe Width
18.00 in
450.00 mm
O/A Track Width
91.00 in
2300.00 mm
Ground Clearance
14.00 in
350.00 mm
Stick Length
87.00 in
2208.00 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).

Sound

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

Sustainability

Recyclability
96%

Engine

Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC
69.00 hp
51.20 kW
Features

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)