308 CR Mini Hydraulic Excavator

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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
69.5 HP
Engine Model
Cat C3.3B
Bore
3.7 in
Displacement
203 in³
Stroke
4.7 in
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
69.5 HP
Gross Power - SAE J1995
74.3 HP

Weights

Operating Weight
20077 lb
Maximum Operating Weight with Cab**
20077 lb
Minimum Operating Weight with Cab*
18610 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.

Dimensions - Long Stick

Dig Depth
182.8 in
Boom In Reach
126.6 in
Boom Swing - Left
23.8 in
Boom Swing - Right
36.8 in
Cab Height
100 in
Ground Clearance
13.8 in
Maximum Blade Depth
16 in
Maximum Blade Height
14.6 in
Maximum Dig Height
277.1 in
Maximum Dump Clearance
199.7 in
Maximum Reach
300.7 in
Maximum Reach - Ground Level
293.7 in
O/A Track Width
90.6 in
O/A Undercarriage Length
113.4 in
Stick Length
92.8 in
Swing Bearing - Height
29.7 in
Tail Swing with Counterweight
62.4 in
Tail Swing without Counterweight
57.1 in
Track Belt/Shoe Width
17.7 in
Vertical Wall
134 in
Note
*Boom Height when stick is pinned in transport position with no attachments.
Note (2)
***With blade positioned at the rear of the machine.
Note (1)
**Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Height - Boom Transport - No Tools*
89 in
Height - Boom Working - With Tools**
120.1 in
Overall Shipping Length - without Counterweight
6872 mm (270.6 in)***
Overall Shipping Length - with Counterweight
6872 mm (270.6 in)***

Blade

Height
17 in
Width - Standard
90.6 in
Width - Wide
96.5 in

Dimensions - Standard Stick

Note (1)
**Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Overall Shipping Length - with Counterweight
264 in
Boom In Reach
120.4 in
Boom Swing - Left
23.8 in
Boom Swing - Right
36.8 in
Cab Height
100 in
Dig Depth
161.7 in
Ground Clearance
13.8 in
Maximum Blade Depth
16 in
Maximum Blade Height
14.6 in
Maximum Dig Height
265.2 in
Maximum Dump Clearance
187.4 in
Maximum Reach
281.1 in
Maximum Reach - Ground Level
273.6 in
O/A Track Width
90.6 in
O/A Undercarriage Length
113.4 in
Stick Length
71.7 in
Swing Bearing - Height
29.7 in
Tail Swing with Counterweight
62.4 in
Tail Swing without Counterweight
57.1 in
Track Belt/Shoe Width
17.7 in
Vertical Wall
117.8 in
Note
*Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight
258.8 in
Note (2)
***With blade positioned at the rear of the machine.
Height - Boom Working - With Tools**
104.7 in
Height - Boom Transport - No Tools*
95.7 in

Air Conditioning System

Air Conditioning
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.

Certification - Cab

Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Tip Over Protective Structure (TOPS)
ISO 12117:1997
Top Guard
ISO 10262:1998 (Level I)

Hydraulic System

Digging Force - Bucket
13946 lb
Digging Force - Stick - Long
8032 lb
Digging Force - Stick - Standard
9509 lb
Operating Pressure - Equipment
4134 psi
Operating Pressure - Swing
3626 psi
Operating Pressure - Travel
4134 psi
Pump Flow at 2,400 rpm
44 gal/min
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Maximum Auxiliary Circuit - Secondary - Flow at Pump
9 gal/min
Maximum Auxiliary Circuit - Primary - Flow at Pump
35 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
4134 psi
Maximum Auxiliary Circuit - Primary - Pressure at Pump
4134 psi
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Service Refill Capacities

Cooling System
2.6 gal (US)
Engine Oil
3 gal (US)
Fuel Tank
39 gal (US)
Hydraulic System
29 gal (US)
Hydraulic Tank
14 gal (US)

Sound

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

Swing System

Boom Swing - Left
60 degrees
Boom Swing - Right
50 degrees
Machine Swing Speed
10.6 r/min

Travel System

Gradeability - Maximum
30 degrees
Ground Pressure - Maximum Weight
5.8 psi
Ground Pressure - Minimum Weight
5.4 psi
Maximum Traction Force - High Speed
6250 lb
Maximum Traction Force - Low Speed
15175 lb
Travel Speed - High
3.2 mile/h
Travel Speed - Low
1.9 mile/h

Weight Increase from Minimum Configuration

Counterweight
552 lb
Long Stick
146 lb
Steel Tracks with Pads
752 lb