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308 CR Mini Hydraulic Excavator

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Product Description

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.

Specifications
Us
Metric
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
20771 lb
9420 kg
Minimum Operating Weight with Cab*
18754 lb
8505 kg
Maximum Operating Weight with Cab**
20771 lb
9420 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, (500 kg/1,103 lb) counterweight, operator, full fuel tank, long stick, blade and no bucket.
Weight Increase from Minimum Configuration
Counterweight
551 lb
250 kg
Counterweight (extra)
1103 lb
500 kg
Long Stick
146 lb
66 kg
Steel Tracks with Pads
752 lb
341 kg
Angle Blade
490 lb
222 kg
Travel System
Travel Speed - High
3.2 mile/h
5.1 km/h
Travel Speed - Low
1.9 mile/h
3.1 km/h
Maximum Traction Force - High Speed
6250 lbf
27.8 kN
Maximum Traction Force - Low Speed
15175 lbf
67.5 kN
Ground Pressure - Minimum Weight
5.4 psi
37.2 kPa
Ground Pressure - Maximum Weight
6 psi
41.2 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
39 gal (US)
147 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
9509 lbf
42.3 kN
Digging Force - Stick - Long
8032 lbf
35.7 kN
Digging Force - Bucket
13946 lbf
62 kN
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Swing System
Machine Swing Speed
10.6 r/min
10.6 r/min
Boom Swing - Left
60 degrees
Boom Swing - Right
50 degrees
Blade
Width - Standard
90.6 in
2300 mm
Width - Wide
96.5 in
2450 mm
Height
17 in
431 mm
Angle Blade Width
90.6 in
2300 mm
Angle Blade Height
17.5 in
441 mm
Angle Blade - Left
25 degrees
Angle Blade - Right
25 degrees
Certification - Cab
Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Top Guard
ISO 10262:1998 (Level I)
Dimensions - Standard Stick
Dig Depth
161.7 in
4108 mm
Vertical Wall
117.8 in
2991 mm
Maximum Reach - Ground Level
273.6 in
6949 mm
Maximum Reach
281.1 in
7141 mm
Maximum Dig Height
265.2 in
6736 mm
Maximum Dump Clearance
187.4 in
4760 mm
Boom In Reach
120.4 in
3059 mm
Tail Swing with Counterweight
62.4 in
1585 mm
Tail Swing without Counterweight
57.1 in
1450 mm
Maximum Blade Height
14.6 in
370 mm
Maximum Blade Depth
16 in
407 mm
Height - Boom Transport - No Tools*
95.7 in
2430 mm
Height - Boom Working - With Tools**
104.7 in
2660 mm
Cab Height
100 in
2541 mm
Swing Bearing - Height
29.7 in
756 mm
O/A Undercarriage Length
113.4 in
2880 mm
Overall Shipping Length - with Counterweight
264 in
6706 mm
Overall Shipping Length - without Counterweight
258.8 in
6574 mm
Boom Swing - Right
36.8 in
935 mm
Boom Swing - Left
23.8 in
604 mm
Track Belt/Shoe Width
17.7 in
450 mm
O/A Track Width
90.6 in
2300 mm
Ground Clearance
13.8 in
350 mm
Stick Length
71.7 in
1820 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
182.8 in
4643 mm
Vertical Wall
134 in
3404 mm
Maximum Reach - Ground Level
293.7 in
7460 mm
Maximum Reach
300.7 in
7637 mm
Maximum Dig Height
277.1 in
7039 mm
Maximum Dump Clearance
199.7 in
5072 mm
Boom In Reach
126.6 in
3215 mm
Tail Swing with Counterweight
62.4 in
1585 mm
Tail Swing without Counterweight
57.1 in
1450 mm
Maximum Blade Height
14.6 in
370 mm
Maximum Blade Depth
16 in
407 mm
Height - Boom Transport - No Tools*
89 in
2260 mm
Height - Boom Working - With Tools**
120.1 in
3050 mm
Cab Height
100 in
2541 mm
Swing Bearing - Height
29.7 in
756 mm
O/A Undercarriage Length
113.4 in
2880 mm
Overall Shipping Length - with Counterweight
6872 mm (270.6 in)***
Overall Shipping Length - without Counterweight
6872 mm (270.6 in)***
Boom Swing - Right
36.8 in
935 mm
Boom Swing - Left
23.8 in
604 mm
Track Belt/Shoe Width
17.7 in
450 mm
O/A Track Width
90.6 in
2300 mm
Ground Clearance
13.8 in
350 mm
Stick Length
92.8 in
2358 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 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%
Standard/Optional

Standard Equipment

ENGINE
HYDRAULICS
OPERATOR ENVIRONMENT
TECHNOLOGY
UNDERCARRIAGE
BOOM, STICK AND LINKAGES
GUARDING
ELECTRICAL
OTHER

Optional Equipment

OPERATOR ENVIRONMENT
UNDERCARRIAGE
BOOM, STICK AND LINKAGES
ELECTRICAL
GUARDING
OTHER
TECHNOLOGY
HYDRAULICS
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