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
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
Stroke
4.7 in
Bore
3.7 in
Displacement
203 in³

Weights

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

Dimensions - Long Stick

Dig Depth
182.8 in
Boom Swing - Left
23.8 in
Maximum Dig Height
277.1 in
Maximum Blade Height
14.6 in
Track Belt/Shoe Width
17.7 in
Cab Height
100 in
Tail Swing with Counterweight
62.4 in
O/A Undercarriage Length
113.4 in
Maximum Dump Clearance
199.7 in
Boom Swing - Right
36.8 in
Maximum Blade Depth
16 in
Ground Clearance
13.8 in
Stick Length
92.8 in
Maximum Reach
300.7 in
Maximum Reach - Ground Level
293.7 in
Boom In Reach
126.6 in
Swing Bearing - Height
29.7 in
O/A Track Width
90.6 in
Tail Swing without Counterweight
57.1 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

Hydraulic System

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.
Digging Force - Bucket
13946 lb
Operating Pressure - Travel
4134 psi
Operating Pressure - Swing
3626 psi
Operating Pressure - Equipment
4134 psi
Digging Force - Stick - Long
8032 lb
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Pump Flow at 2,400 rpm
44 gal/min
Digging Force - Stick - Standard
9509 lb

Swing System

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

Dimensions - Standard Stick

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

Service Refill Capacities

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

Travel System

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

Weight Increase from Minimum Configuration

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

Certification - Cab

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

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.

Sound

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