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301.5 Mini Hydraulic Excavator 21591

301.5 Mini Hydraulic Excavator
21591 301.5 Mini Hydraulic Excavator

The Cat® 301.5 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.

CAT
Excavators
Price: Request a Quote

The Cat® 301.5 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.

Net Power
21 hp
Operating Weight
3,913 lb
Dig Depth
100 in
Engine Model
C1.1

Engine

Net Power
21 hp
Engine Model
C1.1
Displacement
69 in³
Stroke
3.2 in
Bore
3 in
Emissions
Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Note
Net power is tested per ISO 9,249:2,007 and 80/1,269/EEC.
Note (2)
Net power advertised is the power available at the flywheel when the engine is at rated speed and rated power when the engine is installed with the factory configured fan, air intake system, exhaust system, and alternator with a minimum alternator load.
Note (1)
Engine power is tested per ISO 14,396:2,002.
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC
21 hp
Gross Power - SAE J1995:2014
21.6 hp

Weights

Operating Weight
3,913 lb
Minimum Operating Weight with Canopy*
3,483 lb
Note (1)
*Minimum Weight is based on rubber tracks, operator, fixed undercarriage and full fuel tank.
Note (2)
**Maximum Weight is based on steel tracks, operator, expandable undercarriage and full fuel tank.
Note (3)
***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket.
Maximum Operating Weight with Canopy**
3,913 lb
EU: CE Plate Weight***
3,836 lb

Dimensions - Long Stick

Dig Depth
100 in
Maximum Blade Height
10.8 in
Stick Length
45.7 in
Boom Height - Shipping Position
40.9 in
Maximum Reach
155.9 in
Maximum Dig Height
137.4 in
Note
*Overall Shipping Length depends on blade position during shipment.
Tail Swing
32.3 in
O/A Undercarriage Length
57.5 in
Boom In Reach
57.1 in
O/A Shipping Height
90.9 in
Overall Shipping Length*
141.3 in
Maximum Dump Clearance
98.8 in
Minimum Ground Clearance Below Undercarriage
6.1 in
Boom Swing - Left
65 °
Vertical Wall
74.4 in
Track Width - Retracted
39 in
Track Width - Expanded
51.18 in
Maximum Blade Depth
10.2 in
Maximum Reach - Ground Level
153.1 in
Swing Bearing - Height
17.5 in
Track Belt/Shoe Width
9.1 in
Boom Swing - Right
50 °

Blade

Height
8.9 in
Note
*Expanded – 1,300 mm (51 in)
Width*
39 in

Dimensions - Standard Stick

Swing Bearing - Height
17.5 in
O/A Undercarriage Length
57.5 in
Maximum Reach - Ground Level
146.9 in
Maximum Reach
149.6 in
O/A Shipping Height
90.9 in
Maximum Blade Depth
10.2 in
Vertical Wall
70.9 in
Dig Depth
92.1 in
Track Width - Expanded
51.18 in
Track Belt/Shoe Width
9.1 in
Maximum Dig Height
135 in
Overall Shipping Length*
142.5 in
Maximum Blade Height
10.8 in
Note
*Overall Shipping Length depends on blade position during shipment.
Tail Swing
32.3 in
Boom Swing - Left
65 °
Minimum Ground Clearance Below Undercarriage
6.1 in
Stick Length
37.8 in
Boom In Reach
57.5 in
Maximum Dump Clearance
96.5 in
Boom Swing - Right
50 °
Boom Height - Shipping Position
42.9 in
Track Width - Retracted
39 in

Hydraulic System

Pump Flow at 2,400 rpm
17.4 gal/min
Digging Force - Stick - Long
1,616.4 lbf
Operating Pressure - Swing
1,493.9 psi
Auxiliary Circuit - Primary - Flow
8.7 gal/min
Auxiliary Circuit - Secondary - Pressure
3,089.3 psi
Operating Pressure - Travel
3,089.3 psi
Operating Pressure - Equipment
3,089.3 psi
Digging Force - Bucket
3,169.8 lbf
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard
1,843.4 lbf
Auxiliary Circuit - Secondary - Flow
3.7 gal/min
Auxiliary Circuit - Primary - Pressure
3,089.3 psi

Travel System

Maximum Traction Force - High Speed
2,315.5 lbf
Ground Pressure - Maximum Weight
4.4 psi
Travel Speed - High
2.7 mile/h
Travel Speed - Low
1.8 mile/h
Maximum Traction Force - Low Speed
3,597 lbf
Gradeability - Maximum
30 degrees
Ground Pressure - Minimum Weight
4 psi

Certification - Canopy

Roll Over Protective Structure (ROPS)
ISO 12,117-2:2,008
Tip Over Protective Structure (TOPS)
ISO 12,117:1,997
Top Guard
ISO 10,262:1,998 (Level I)

Service Refill Capacities

Cooling System
1 gal (US)
Engine Oil
1.2 gal (US)
Hydraulic System
6.9 gal (US)
Hydraulic Tank
4.8 gal (US)
Fuel Tank
5.8 gal (US)

Swing System

Machine Swing Speed
9.8 r/min

Weight Increase from Minimum Configuration

Long Stick
18 lb
Steel Tracks
126 lb
Expandable Undercarriage
284 lb

Sound

Note
European Union Directive “2,000/14/EC”
Average Exterior Sound Pressure (ISO 6395:2008)
93 dB(A)

Sustainability

Recyclability
95%

Standard Equipment:

  • Engine
    • Cat C1.1 Engine (U.S. EPA Tier 4 Final/EU Stage V)
    • Automatic Engine Idle
    • Automatic Engine Shutdown
    • Automatic Two Speed Travel
    • Fuel Water Separator
    • Power on Demand (not available in all regions)
    • Variable Displacement Piston Pump
    • Load Sensing/Flow Sharing Hydraulics
  • Hydraulics
    • Smart Tech Electronic Pump
    • Accumulator
    • Automatic Swing Brake
    • Auxiliary Hydraulic Lines
    • One and Two Way Auxiliary Flow
    • Continuous Auxiliary Flow
    • Auxiliary Line Quick Disconnects
  • Operator Environment
    • Tilt-up Canopy
    • Top Guard ISO 10262:1998 Level I
    • ROPS – ISO 12117-2:2008
    • TOPS – ISO 12117:1997
    • Machine 2-Point Lifting
    • Stick Steer Mode
    • Travel Cruise Control
    • Control Pattern Changer (optional in some regions)
    • Adjustable Wrist Rests
    • Washable Floor Mat
    • Travel Pedals and Hand Levers
    • Machine Security
    • Machine Security – Standard Key with Pass Code
    • Vinyl Non-Suspension Seat
    • Hydraulic Lockout – All Controls
    • Retractable High Visibility Seat Belt (75 mm/3 in)
    • Coat Hook
    • Cup Holder
    • Storage Pocket
    • Skylight
    • Mounting Bosses for Front
    • Signaling/Warning Horn
    • Boom Light, Halogen
    • Utility Space for Mobile Phone
    • Next Generation Color LCD Monitor (IP66)
      – Fuel Level and Coolant Temperature Gauges
      – Maintenance and Machine Monitoring
      – Performance and Machine Adjustments
      – Numeric Security Code
      – Multiple Languages
      – Hour Meter with Wake Up Switch
  • Undercarriage
    • Rubber Belt (230 mm/9 in wide)
    • Dozer Blade
    • Dozer Blade Float
    • Hydraulic Track Adjusters
    • Tie Downs on Track Frame
  • Boom, Stick And Linkages
    • One Piece Boom (1780 mm/70 in)
    • Standard Stick (960 mm/37.8 in)
    • Front Shovel Capable
    • Front Shovel Capable – Pin-On
    • Thumb Ready (not available in all regions)
    • Certified Lifting Eye (optional in some regions)
  • Electrical
    • 12 Volt Battery
    • Software (machine and monitor)
    • Maintenance Free Battery
    • Signaling/Warning Horn
    • 12 Volt Power Socket

Optional Equipment:

  • Operator Environment
    • Control Pattern Changer (optional in some regions)
    • No Travel Pedals and Hand Levers
    • Machine Security – Push to Start with Key Fob/Pass Code
    • Vinyl Suspension Seat
    • LED Front Lights
    • LED Front and Rear Lights
    • LED Boom Light
    • Mirrors Left and Right
  • Undercarriage
    • Steel Track (230 mm/9 in wide)
    • Expandable Undercarriage
  • Boom, Stick And Linkages
    • Long Stick (1160 mm/45.7 in)
    • Front Shovel Capable – Dual Lock Manual Coupler
    • Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
    • 2nd Auxiliary Hydraulic Lines
    • Boom Lowering Check Valve
    • Stick Lowering Check Valve
    • Hydraulic Quick Coupler Lines (not available in all regions)
  • Electrical
    • Lock Out/Tag Out Battery Disconnect
    • Product Link PL243 (regulations apply)
    • Product Link PLE643 (regulations apply)
    • Travel Alarm (standard in some regions)
  • Guarding
    • Guard, Canopy
    • Guard, Mesh
  • Other
    • Bio Oil Capable
    • Eco Drain
    • Water Jacket Heater

Specifications

Engine

Net Power
21 hp
Engine Model
C1.1
Displacement
69 in³
Stroke
3.2 in
Bore
3 in
Emissions
Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Note
Net power is tested per ISO 9,249:2,007 and 80/1,269/EEC.
Note (2)
Net power advertised is the power available at the flywheel when the engine is at rated speed and rated power when the engine is installed with the factory configured fan, air intake system, exhaust system, and alternator with a minimum alternator load.
Note (1)
Engine power is tested per ISO 14,396:2,002.
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC
21 hp
Gross Power - SAE J1995:2014
21.6 hp

Weights

Operating Weight
3,913 lb
Minimum Operating Weight with Canopy*
3,483 lb
Note (1)
*Minimum Weight is based on rubber tracks, operator, fixed undercarriage and full fuel tank.
Note (2)
**Maximum Weight is based on steel tracks, operator, expandable undercarriage and full fuel tank.
Note (3)
***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket.
Maximum Operating Weight with Canopy**
3,913 lb
EU: CE Plate Weight***
3,836 lb

Dimensions - Long Stick

Dig Depth
100 in
Maximum Blade Height
10.8 in
Stick Length
45.7 in
Boom Height - Shipping Position
40.9 in
Maximum Reach
155.9 in
Maximum Dig Height
137.4 in
Note
*Overall Shipping Length depends on blade position during shipment.
Tail Swing
32.3 in
O/A Undercarriage Length
57.5 in
Boom In Reach
57.1 in
O/A Shipping Height
90.9 in
Overall Shipping Length*
141.3 in
Maximum Dump Clearance
98.8 in
Minimum Ground Clearance Below Undercarriage
6.1 in
Boom Swing - Left
65 °
Vertical Wall
74.4 in
Track Width - Retracted
39 in
Track Width - Expanded
51.18 in
Maximum Blade Depth
10.2 in
Maximum Reach - Ground Level
153.1 in
Swing Bearing - Height
17.5 in
Track Belt/Shoe Width
9.1 in
Boom Swing - Right
50 °

Blade

Height
8.9 in
Note
*Expanded – 1,300 mm (51 in)
Width*
39 in

Dimensions - Standard Stick

Swing Bearing - Height
17.5 in
O/A Undercarriage Length
57.5 in
Maximum Reach - Ground Level
146.9 in
Maximum Reach
149.6 in
O/A Shipping Height
90.9 in
Maximum Blade Depth
10.2 in
Vertical Wall
70.9 in
Dig Depth
92.1 in
Track Width - Expanded
51.18 in
Track Belt/Shoe Width
9.1 in
Maximum Dig Height
135 in
Overall Shipping Length*
142.5 in
Maximum Blade Height
10.8 in
Note
*Overall Shipping Length depends on blade position during shipment.
Tail Swing
32.3 in
Boom Swing - Left
65 °
Minimum Ground Clearance Below Undercarriage
6.1 in
Stick Length
37.8 in
Boom In Reach
57.5 in
Maximum Dump Clearance
96.5 in
Boom Swing - Right
50 °
Boom Height - Shipping Position
42.9 in
Track Width - Retracted
39 in

Hydraulic System

Pump Flow at 2,400 rpm
17.4 gal/min
Digging Force - Stick - Long
1,616.4 lbf
Operating Pressure - Swing
1,493.9 psi
Auxiliary Circuit - Primary - Flow
8.7 gal/min
Auxiliary Circuit - Secondary - Pressure
3,089.3 psi
Operating Pressure - Travel
3,089.3 psi
Operating Pressure - Equipment
3,089.3 psi
Digging Force - Bucket
3,169.8 lbf
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard
1,843.4 lbf
Auxiliary Circuit - Secondary - Flow
3.7 gal/min
Auxiliary Circuit - Primary - Pressure
3,089.3 psi

Travel System

Maximum Traction Force - High Speed
2,315.5 lbf
Ground Pressure - Maximum Weight
4.4 psi
Travel Speed - High
2.7 mile/h
Travel Speed - Low
1.8 mile/h
Maximum Traction Force - Low Speed
3,597 lbf
Gradeability - Maximum
30 degrees
Ground Pressure - Minimum Weight
4 psi

Certification - Canopy

Roll Over Protective Structure (ROPS)
ISO 12,117-2:2,008
Tip Over Protective Structure (TOPS)
ISO 12,117:1,997
Top Guard
ISO 10,262:1,998 (Level I)

Service Refill Capacities

Cooling System
1 gal (US)
Engine Oil
1.2 gal (US)
Hydraulic System
6.9 gal (US)
Hydraulic Tank
4.8 gal (US)
Fuel Tank
5.8 gal (US)

Swing System

Machine Swing Speed
9.8 r/min

Weight Increase from Minimum Configuration

Long Stick
18 lb
Steel Tracks
126 lb
Expandable Undercarriage
284 lb

Sound

Note
European Union Directive “2,000/14/EC”
Average Exterior Sound Pressure (ISO 6395:2008)
93 dB(A)

Sustainability

Recyclability
95%

Standard/Optional Features

Standard Equipment:

  • Engine
    • Cat C1.1 Engine (U.S. EPA Tier 4 Final/EU Stage V)
    • Automatic Engine Idle
    • Automatic Engine Shutdown
    • Automatic Two Speed Travel
    • Fuel Water Separator
    • Power on Demand (not available in all regions)
    • Variable Displacement Piston Pump
    • Load Sensing/Flow Sharing Hydraulics
  • Hydraulics
    • Smart Tech Electronic Pump
    • Accumulator
    • Automatic Swing Brake
    • Auxiliary Hydraulic Lines
    • One and Two Way Auxiliary Flow
    • Continuous Auxiliary Flow
    • Auxiliary Line Quick Disconnects
  • Operator Environment
    • Tilt-up Canopy
    • Top Guard ISO 10262:1998 Level I
    • ROPS – ISO 12117-2:2008
    • TOPS – ISO 12117:1997
    • Machine 2-Point Lifting
    • Stick Steer Mode
    • Travel Cruise Control
    • Control Pattern Changer (optional in some regions)
    • Adjustable Wrist Rests
    • Washable Floor Mat
    • Travel Pedals and Hand Levers
    • Machine Security
    • Machine Security – Standard Key with Pass Code
    • Vinyl Non-Suspension Seat
    • Hydraulic Lockout – All Controls
    • Retractable High Visibility Seat Belt (75 mm/3 in)
    • Coat Hook
    • Cup Holder
    • Storage Pocket
    • Skylight
    • Mounting Bosses for Front
    • Signaling/Warning Horn
    • Boom Light, Halogen
    • Utility Space for Mobile Phone
    • Next Generation Color LCD Monitor (IP66)
      – Fuel Level and Coolant Temperature Gauges
      – Maintenance and Machine Monitoring
      – Performance and Machine Adjustments
      – Numeric Security Code
      – Multiple Languages
      – Hour Meter with Wake Up Switch
  • Undercarriage
    • Rubber Belt (230 mm/9 in wide)
    • Dozer Blade
    • Dozer Blade Float
    • Hydraulic Track Adjusters
    • Tie Downs on Track Frame
  • Boom, Stick And Linkages
    • One Piece Boom (1780 mm/70 in)
    • Standard Stick (960 mm/37.8 in)
    • Front Shovel Capable
    • Front Shovel Capable – Pin-On
    • Thumb Ready (not available in all regions)
    • Certified Lifting Eye (optional in some regions)
  • Electrical
    • 12 Volt Battery
    • Software (machine and monitor)
    • Maintenance Free Battery
    • Signaling/Warning Horn
    • 12 Volt Power Socket

Optional Equipment:

  • Operator Environment
    • Control Pattern Changer (optional in some regions)
    • No Travel Pedals and Hand Levers
    • Machine Security – Push to Start with Key Fob/Pass Code
    • Vinyl Suspension Seat
    • LED Front Lights
    • LED Front and Rear Lights
    • LED Boom Light
    • Mirrors Left and Right
  • Undercarriage
    • Steel Track (230 mm/9 in wide)
    • Expandable Undercarriage
  • Boom, Stick And Linkages
    • Long Stick (1160 mm/45.7 in)
    • Front Shovel Capable – Dual Lock Manual Coupler
    • Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
    • 2nd Auxiliary Hydraulic Lines
    • Boom Lowering Check Valve
    • Stick Lowering Check Valve
    • Hydraulic Quick Coupler Lines (not available in all regions)
  • Electrical
    • Lock Out/Tag Out Battery Disconnect
    • Product Link PL243 (regulations apply)
    • Product Link PLE643 (regulations apply)
    • Travel Alarm (standard in some regions)
  • Guarding
    • Guard, Canopy
    • Guard, Mesh
  • Other
    • Bio Oil Capable
    • Eco Drain
    • Water Jacket Heater

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