Specifications

Overview

The Cat® 304E2 CR Mini Hydraulic Excavator delivers efficient performance, durability and versatility in a compact design to help you work in a variety of applications.

Engine Model	Cat® C2.4
Net Power	30 kW40.2 HP
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269	30 kW40.2 HP
Operating Weight	4080 kg8996 lb
Weight - Canopy, Standard Stick	3925 kg8655 lb
Bore	87 mm3.4 in
Displacement	2.4 l146 in³
Stroke	102.4 mm4 in
Maximum Traction Force - High Speed	16.9 kN3799 lb
Maximum Traction Force - Low Speed	31 kN6969 lb
Travel Speed - High	5.2 km/h3.2 mile/h
Travel Speed - Low	3.3 km/h2.1 mile/h
Auxiliary Circuit - Primary (186 bar/2,734 psi)	70 l/min18.5 gal/min
Auxiliary Circuit - Secondary (174 bar/2,524 psi)	25 l/min6.6 gal/min
Digging Force - Stick - Long	19.5 kN4384 lb
Digging Force - Stick - Standard	21.6 kN4856 lb
Operating Pressure - Equipment	245 bar3553 psi
Operating Pressure - Swing	216 bar3132 psi
Operating Pressure - Travel	245 bar3553 psi
Pump Flow at 2,200 rpm	100 l/min26.4 gal/min
Machine Swing Speed	10 r/min10 r/min
Boom Swing - Left - With Stop*	55°
Boom Swing - Left - Without Stop*	70°
Boom Swing - Right	50°
Width	1950 mm76.8 in
Height	325 mm12.8 in
Dig Depth	470 mm18.5 in
Lift Height	400 mm15.7 in
Cooling System	5.5 l1.5 gal (US)
Engine Oil	9.5 l2.5 gal (US)
Hydraulic Tank	42.3 l11.2 gal (US)
Fuel Tank	46 l12.2 gal (US)
Hydraulic System	65 l17.2 gal (US)
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 1.4 metric tonnes.
Dynamic Operator Sound Pressure Level (ISO 6396:2008)	81 dB(A)81 dB(A)
Exterior Sound Power Level - ISO 6395:2008*	96 dB(A)96 dB(A)
Note	*European Union Directive “2000/14/EC”
Roll Over Protective Structure (ROPS)	ISO 12117-2
Tip Over Protective Structure (TOPS)	ISO 12117
Top Guard	ISO 10262 (Level I)
Boom Height - Shipping Position	1770 mm70 in
Boom In Reach	2220 mm87 in
Boom Swing - Left	670 mm26 in
Boom Swing - Right	735 mm29 in
Dig Depth	3430 mm135 in
Maximum Blade Depth	470 mm19 in
Maximum Blade Height	400 mm16 in
Maximum Dig Height	5070 mm200 in
Maximum Dump Clearance	3690 mm145 in
Maximum Reach	5590 mm220 in
Maximum Reach - Ground Level	5470 mm215 in
O/A Shipping Height	2500 mm98 in
O/A Shipping Length	4930 mm194 in
O/A Track Width	1950 mm77 in
O/A Undercarriage Length	2220 mm87 in
Swing Bearing - Height	565 mm22 in
Tail Swing	975 mm38 in
Track Belt/Shoe Width	350 mm14 in
Vertical Wall	2560 mm101 in
Boom Height - Shipping Position	1480 mm58 in
Boom In Reach	2110 mm83 in
Boom Swing - Left	670 mm26 in
Boom Swing - Right	735 mm29 in
Dig Depth	3130 mm123 in
Maximum Blade Depth	470 mm19 in
Maximum Blade Height	400 mm16 in
Maximum Dig Height	4980 mm196 in
Maximum Dump Clearance	3590 mm141 in
Maximum Reach	5350 mm211 in
Maximum Reach - Ground Level	5220 mm206 in
O/A Shipping Height	2500 mm98 in
O/A Shipping Length	4820 mm190 in
O/A Track Width	1950 mm77 in
O/A Undercarriage Length	2220 mm87 in
Swing Bearing - Height	565 mm22 in
Tail Swing	975 mm38 in
Track Belt/Shoe Width	350 mm14 in
Vertical Wall	2420 mm95 in
Emissions	*Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
Gross Power - ISO 14396	31.2 kW41.8 HP
Digging Force - Bucket	37.8 kN8498 lb
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump
Blade Down - Front	1570 kg3462 lb
Blade Down - Side	910 kg2007 lb
Blade Up - Front	820 kg1808 lb
Blade Up - Side	820 kg1808 lb
Blade Down - Front	860 kg1896 lb
Blade Down - Side	480 kg1058 lb
Blade Up - Front	430 kg948 lb
Blade Up - Side	430 kg948 lb
Machine Overhang	0 mm0 in
Stick Length - Long	1615 mm64 in
Stick Length - Standard	1315 mm52 in
Note	*Automatic swing brake, spring applied, hydraulic release.
Gradeability - Maximum	30°
Ground Pressure - Cab	29.5 kPa4.3 psi
Ground Pressure - Canopy	28.1 kPa4.1 psi
Number of Carrier Rollers	1
Number of Track Rollers	4
Track Roller Type	Center Flange
Note	*Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Weight - Cab, Long Stick	4080 kg8996 lb
Weight - Cab, Standard Stick	4050 kg8930 lb
Weight - Canopy, Long Stick	3955 kg8721 lb

304E2 CR Standard Equipment

ENGINE
- Cat C2.4 diesel engine (meets U.S. EPA Tier 4 Final emission standards for North America and EU Stage IIIA/Tier 4 Interim emission standards for all other regions)
- Automatic engine idle
- Automatic engine shut-off
- Automatic two speed travel
- Diesel Particulate Filter (North America only)
- Diesel Oxidation Catalyst (North America only)
- Fuel and water separator
- Power on demand

HYDRAULIC SYSTEM
- 1-way and 2-way (combined function)
- Accumulator
- Automatic swing parking brake
- Auxiliary hydraulic lines
- Adjustable auxiliary relief
- Auxiliary line quick disconnects
- Cat interlock system: hydraulic lockout
- Continuous auxiliary flow
- Ecology drain
- Hydraulic oil cooler
- High definition hydraulics
- Load sensing/flow sharing

OPERATOR ENVIRONMENT
- 100% pilot control ergonomic joysticks
- Adjustable armrests
- COMPASS: complete, operation, maintenance, performance and security system
  - Multiple languages
- Cup holder
- Hydraulic neutral lockout bar
- Literature holder
- Pattern changer (optional in Europe)
- Site reference system: leveling
- Tool storage area
- Travel control pedals with hand levers
- Washable floor mat

UNDERCARRIAGE
- Dozer blade with float function
- Track, rubber belt, 350 mm (14 in) width
- Tie down eyes on track frame
- Towing eye on base frame

FRONT LINKAGE
- 200 degree bucket rotation
- Certified lifting eye on bucket linkage (optional in Europe)
- Front shovel capable
- Thumb ready stick

ELECTRICAL
- 12 volt electrical system
- 60 ampere alternator
- 650 CCA maintenance free battery
- Fuse box
- Ignition key start/stop switch
- Slow blow fuse
- Warning horn

LIGHTS AND MIRRORS
- Boom light with time delay capability

SAFETY AND SECURITY
- Anti-theft system (COMPASS)
- Caterpillar Corporate “One Key” System
- Door locks
- Lockable fuel cap
- Retractable seat belt
- Roll Over Protective Structure (ROPS) (ISO 12117-2)
- Tip Over Protective Structure (TOPS) (ISO 12117)
- Top guard – ISO 10262 (Level 1)
- Travel alarm (optional in Europe)

TECHNOLOGY
- Product Link™

304E2 CR Optional Equipment

ENGINE
- Engine block heater

HYDRAULIC SYSTEM
- Quick coupler lines
- Boom lowering check valve
- Stick lowering check valve
- Secondary auxiliary hydraulic lines

OPERATOR ENVIRONMENT
- Cab:
  - Air conditioning
  - Heat
  - High back suspension seat
  - Interior light
  - Interlocking front window system
  - Radio
  - Windshield wiper

UNDERCARRIAGE
- Power angle blade
- Track, double grouser (steel), 350 mm (14 in)

FRONT LINKAGE
- Quick coupler: manual or hydraulic
- Thumb
- Buckets
- Full range of performance matched work tools
  - Auger, hammer, ripper

LIGHTS AND MIRRORS
- Light, cab with time delay capability
- Mirror, canopy right
- Mirror, canopy left
- Mirror, cab rear

SAFETY AND SECURITY
- Battery disconnect
- Beacon socket
- Front wire mesh guard
- Rearview camera
- Vandal guard

QUALITY

EFFICIENCY

VERSATILITY

PERFORMANCE

SERVICEABILITY

SAFETY

A14B

Optimal Hydraulic Flow
42-83 L/min (11-22 gpm)

Overall Height
958 mm38 in

Weight
120 kg264 lb

A19B

Optimal Hydraulic Flow
42-83 L/min (11-22 gpm)

Overall Height
875 mm35 in

Weight
94 kg207 lb

A14B

Optimal Hydraulic Flow
42-83 L/min (11-22 gpm)

Overall Height
947 mm37 in

Weight
117 kg257 lb

A19B

Optimal Hydraulic Flow
42-83 L/min (11-22 gpm)

Overall Height
875 mm35 in

Weight
92 kg205 lb

305 mm (12 in)

Width
305 mm12 in

Rated Capacity
48.1 l1.7 ft³

Weight
65 kg143.3 lb

406 mm (16 in)

Width
406 mm16 in

Rated Capacity
70.8 l2.5 ft³

Weight
74 kg163.1 lb

457 mm (18 in)

Width
457 mm18 in

Rated Capacity
82.1 l2.9 ft³

Weight
82 kg180.8 lb

508 mm (20 in)

Width
508 mm20 in

Rated Capacity
93.4 l3.3 ft³

Weight
87 kg191.8 lb

619 mm (24 in)

Width
619 mm24.4 in

Rated Capacity
118.9 l4.2 ft³

Weight
98 kg216.1 lb

762 mm (30 in)

Width
762 mm30 in

Rated Capacity
158.6 l5.6 ft³

Weight
117 kg257.9 lb

914 mm (36 in)

Width
914 mm36 in

Rated Capacity
199.9 l7.1 ft³

Weight
133 kg293.2 lb

1000 mm (40 in)

Interface Type
Pin On

Capacity
135.9 l4.8 ft³

Width
1000 mm39.4 in

1400 mm (55 in)

Interface Type
Pin On

Capacity
6.96 ft³197.1 l

Width
1400 mm55.1 in

1200 mm (47 in)

Interface Type
Pin On

Capacity
5.9 ft³167.1 l

Width
1200 mm47.2 in

1200 mm (47 in)

Width
1200 mm47.2 in

Rated Capacity
231.9 l8.19 ft³

Weight
172.8 kg380.9 lb

1200 mm (47 in)

Width
1200 mm47.2 in

Rated Capacity
158.6 m³5.6 ft³

Weight
162.3 kg357.8 lb

490 mm (19 in)

Tip Radius
650 mm26 in

Weight
45 kg99 lb

Overall Length
659 mm26 in

Specifications

Engine Model	Cat® C2.4
Net Power	30 kW40.2 HP
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269	30 kW40.2 HP
Operating Weight	4080 kg8996 lb
Weight - Canopy, Standard Stick	3925 kg8655 lb
Bore	87 mm3.4 in
Displacement	2.4 l146 in³
Stroke	102.4 mm4 in
Maximum Traction Force - High Speed	16.9 kN3799 lb
Maximum Traction Force - Low Speed	31 kN6969 lb
Travel Speed - High	5.2 km/h3.2 mile/h
Travel Speed - Low	3.3 km/h2.1 mile/h
Auxiliary Circuit - Primary (186 bar/2,734 psi)	70 l/min18.5 gal/min
Auxiliary Circuit - Secondary (174 bar/2,524 psi)	25 l/min6.6 gal/min
Digging Force - Stick - Long	19.5 kN4384 lb
Digging Force - Stick - Standard	21.6 kN4856 lb
Operating Pressure - Equipment	245 bar3553 psi
Operating Pressure - Swing	216 bar3132 psi
Operating Pressure - Travel	245 bar3553 psi
Pump Flow at 2,200 rpm	100 l/min26.4 gal/min
Machine Swing Speed	10 r/min10 r/min
Boom Swing - Left - With Stop*	55°
Boom Swing - Left - Without Stop*	70°
Boom Swing - Right	50°
Width	1950 mm76.8 in
Height	325 mm12.8 in
Dig Depth	470 mm18.5 in
Lift Height	400 mm15.7 in
Cooling System	5.5 l1.5 gal (US)
Engine Oil	9.5 l2.5 gal (US)
Hydraulic Tank	42.3 l11.2 gal (US)
Fuel Tank	46 l12.2 gal (US)
Hydraulic System	65 l17.2 gal (US)
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 1.4 metric tonnes.
Dynamic Operator Sound Pressure Level (ISO 6396:2008)	81 dB(A)81 dB(A)
Exterior Sound Power Level - ISO 6395:2008*	96 dB(A)96 dB(A)
Note	*European Union Directive “2000/14/EC”
Roll Over Protective Structure (ROPS)	ISO 12117-2
Tip Over Protective Structure (TOPS)	ISO 12117
Top Guard	ISO 10262 (Level I)
Boom Height - Shipping Position	1770 mm70 in
Boom In Reach	2220 mm87 in
Boom Swing - Left	670 mm26 in
Boom Swing - Right	735 mm29 in
Dig Depth	3430 mm135 in
Maximum Blade Depth	470 mm19 in
Maximum Blade Height	400 mm16 in
Maximum Dig Height	5070 mm200 in
Maximum Dump Clearance	3690 mm145 in
Maximum Reach	5590 mm220 in
Maximum Reach - Ground Level	5470 mm215 in
O/A Shipping Height	2500 mm98 in
O/A Shipping Length	4930 mm194 in
O/A Track Width	1950 mm77 in
O/A Undercarriage Length	2220 mm87 in
Swing Bearing - Height	565 mm22 in
Tail Swing	975 mm38 in
Track Belt/Shoe Width	350 mm14 in
Vertical Wall	2560 mm101 in
Boom Height - Shipping Position	1480 mm58 in
Boom In Reach	2110 mm83 in
Boom Swing - Left	670 mm26 in
Boom Swing - Right	735 mm29 in
Dig Depth	3130 mm123 in
Maximum Blade Depth	470 mm19 in
Maximum Blade Height	400 mm16 in
Maximum Dig Height	4980 mm196 in
Maximum Dump Clearance	3590 mm141 in
Maximum Reach	5350 mm211 in
Maximum Reach - Ground Level	5220 mm206 in
O/A Shipping Height	2500 mm98 in
O/A Shipping Length	4820 mm190 in
O/A Track Width	1950 mm77 in
O/A Undercarriage Length	2220 mm87 in
Swing Bearing - Height	565 mm22 in
Tail Swing	975 mm38 in
Track Belt/Shoe Width	350 mm14 in
Vertical Wall	2420 mm95 in
Emissions	*Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
Gross Power - ISO 14396	31.2 kW41.8 HP
Digging Force - Bucket	37.8 kN8498 lb
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump
Blade Down - Front	1570 kg3462 lb
Blade Down - Side	910 kg2007 lb
Blade Up - Front	820 kg1808 lb
Blade Up - Side	820 kg1808 lb
Blade Down - Front	860 kg1896 lb
Blade Down - Side	480 kg1058 lb
Blade Up - Front	430 kg948 lb
Blade Up - Side	430 kg948 lb
Machine Overhang	0 mm0 in
Stick Length - Long	1615 mm64 in
Stick Length - Standard	1315 mm52 in
Note	*Automatic swing brake, spring applied, hydraulic release.
Gradeability - Maximum	30°
Ground Pressure - Cab	29.5 kPa4.3 psi
Ground Pressure - Canopy	28.1 kPa4.1 psi
Number of Carrier Rollers	1
Number of Track Rollers	4
Track Roller Type	Center Flange
Note	*Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Weight - Cab, Long Stick	4080 kg8996 lb
Weight - Cab, Standard Stick	4050 kg8930 lb
Weight - Canopy, Long Stick	3955 kg8721 lb

Equipment

304E2 CR Standard Equipment

ENGINE
- Cat C2.4 diesel engine (meets U.S. EPA Tier 4 Final emission standards for North America and EU Stage IIIA/Tier 4 Interim emission standards for all other regions)
- Automatic engine idle
- Automatic engine shut-off
- Automatic two speed travel
- Diesel Particulate Filter (North America only)
- Diesel Oxidation Catalyst (North America only)
- Fuel and water separator
- Power on demand

HYDRAULIC SYSTEM
- 1-way and 2-way (combined function)
- Accumulator
- Automatic swing parking brake
- Auxiliary hydraulic lines
- Adjustable auxiliary relief
- Auxiliary line quick disconnects
- Cat interlock system: hydraulic lockout
- Continuous auxiliary flow
- Ecology drain
- Hydraulic oil cooler
- High definition hydraulics
- Load sensing/flow sharing

OPERATOR ENVIRONMENT
- 100% pilot control ergonomic joysticks
- Adjustable armrests
- COMPASS: complete, operation, maintenance, performance and security system
  - Multiple languages
- Cup holder
- Hydraulic neutral lockout bar
- Literature holder
- Pattern changer (optional in Europe)
- Site reference system: leveling
- Tool storage area
- Travel control pedals with hand levers
- Washable floor mat

UNDERCARRIAGE
- Dozer blade with float function
- Track, rubber belt, 350 mm (14 in) width
- Tie down eyes on track frame
- Towing eye on base frame

FRONT LINKAGE
- 200 degree bucket rotation
- Certified lifting eye on bucket linkage (optional in Europe)
- Front shovel capable
- Thumb ready stick

ELECTRICAL
- 12 volt electrical system
- 60 ampere alternator
- 650 CCA maintenance free battery
- Fuse box
- Ignition key start/stop switch
- Slow blow fuse
- Warning horn

LIGHTS AND MIRRORS
- Boom light with time delay capability

SAFETY AND SECURITY
- Anti-theft system (COMPASS)
- Caterpillar Corporate “One Key” System
- Door locks
- Lockable fuel cap
- Retractable seat belt
- Roll Over Protective Structure (ROPS) (ISO 12117-2)
- Tip Over Protective Structure (TOPS) (ISO 12117)
- Top guard – ISO 10262 (Level 1)
- Travel alarm (optional in Europe)

TECHNOLOGY
- Product Link™

304E2 CR Optional Equipment

ENGINE
- Engine block heater

HYDRAULIC SYSTEM
- Quick coupler lines
- Boom lowering check valve
- Stick lowering check valve
- Secondary auxiliary hydraulic lines

OPERATOR ENVIRONMENT
- Cab:
  - Air conditioning
  - Heat
  - High back suspension seat
  - Interior light
  - Interlocking front window system
  - Radio
  - Windshield wiper