621H Wheel Tractor-Scraper

621H Wheel Tractor-Scraper

Quick loading, high travel speeds and the ability to load and dump on the run yield fast cycle times, allowing Cat Wheel Tractor-Scrapers to consistently deliver high productivity at the lowest cost per ton.

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Tractor Engine

Flywheel Power: Tractor/Scraper
304 kW (407 hp)
Flywheel Power - Tractor/Scraper
304 kW (407 hp)

Scraper Bowl

Scraper Capacity: Heaped
24.0yd3
Rated Load
57600.0lb
Heaped Capacity
24.0yd3
Maximum Depth of Cut
12.4in
Maximum Depth of Spread
21.3in
Maximum Ground Clearance at Cutting Edge
23.4in
Maximum Hydraulic Penetration Force
130390.0lb
Struck Capacity
17.1yd3
Thickness of Cutting Edge
0.9in
Width of Cut, Outside Router Bits
123.5in
Maximum Apron Closure Force
50580lb
Maximum Apron Opening
69.6in
Scraper Capacity - Heaped
24yd³
Rated Load
57600lb
Heaped Capacity
24yd³
Maximum Depth of Cut
12.4in
Maximum Depth of Spread
21.3in
Maximum Ground Clearance at Cutting Edge
23.4in
Maximum Hydraulic Penetration Force
130390lb
Struck Capacity
17.1yd³
Thickness - Cutting Edge
0.9in
Width - Cut - Outside Router Bits
123.5in

Transmission

Top Speed (Loaded)
33.5mph
1 Forward
3.1mph
2 Forward
5.5mph
3 Forward
7.5mph
4 Forward
10.1mph
5 Forward
13.6mph
6 Forward
18.4mph
7 Forward
24.8mph
8 Forward
33.5mph
Reverse
5.7mph
Top Speed - Loaded
33.5mile/h
1 Forward
3.1mile/h
2 Forward
5.5mile/h
3 Forward
7.5mile/h
4 Forward
10.1mile/h
5 Forward
13.6mile/h
6 Forward
18.4mile/h
7 Forward
24.8mile/h
8 Forward
33.5mile/h
Reverse
5.7mile/h

Engine

Max. Power
407.0hp
Tractor
Cat® C13 ACERT™
Maximum Power
407HP
Tractor
Cat® C13 ACERT™

Tractor Engine - U.S. EPA Tier 4 Interim/EU Stage IIIB

Bore
5.1in
Displacement
763.0in3
Max. Power (All Gears) (ISO 14396)
407.0hp
Max. Power Reference Engine Speed
1700.0RPM
Stroke
6.2in
Tractor Engine
Cat® C13 ACERT™
Bore
5.1in
Displacement
763in³
Maximum Power - All Gears - ISO 14396
407HP
Maximum Power Reference Engine Speed
1700r/min
Stroke
6.2in
Tractor Engine
Cat® C13 ACERT™

Tractor Engine - Prior U.S. EPA Tier 3/EU Stage IIIA configuration*

Bore
5.1in
Displacement
763.0in3
Max. Power (All Gears) (ISO 14396)
407.0hp
Max. Power Reference Engine Speed
1700.0RPM
Stroke
6.2in
Tractor Engine
Cat® C13 ACERT™

Service Refill Capacities - Scraper

Fuel Tank
201.6gal
Non-Powered Wheel
1.1gal
Fuel Tank
201.6gal (US)
Non-Powered Wheel
1.1gal (US)

Service Refill Capacities - Tractor

Engine Crankcase
8.75gal
Windshield Washer Reservoir
1.3gal
Transmission
18.5gal
Differential
45.8gal
Final Drive (per side)
5.0gal
Cooling System
17.0gal
Hydraulic Reservoir
22.0gal
Engine Crankcase
8.75gal (US)
Windshield Washer Reservoir
1.3gal (US)
Transmission
18.5gal (US)
Differential
45.8gal (US)
Final Drive - Each
5gal (US)
Cooling System
17gal (US)
Hydraulic Reservoir
22gal (US)

Standards

Standards
Standards
Standards
Standards

Hydraulics

Cushion Hitch Circuit Flow
10.6gal/min
Cushion Hitch Cylinder Bore
5.5in
Cushion Hitch Cylinder Stroke
9.9in
Scraper Circuit Flow
66.0gal/min
Secondary Steering Circuit Flow
10.3gal/min
Steering Circuit Flow
61.8gal/min
Steering Cylinder Bore
5.0in
Steering Cylinder Stroke
44.4in
Bowl Cylinder Bore
5.5in
Bowl Cylinder Stroke
33.3in
Apron Cylinder Bore
5.9in
Apron Cylinder Stroke
22.2in
Ejector Cylinder Bore
5.5in
Ejector Cylinder Stroke
61.0in
Push/Pull Bail Cylinder Bore
3.5in
Push/Pull Bail Cylinder Stroke
16.3in
Cushion Hitch Circuit Flow
10.6gal/min
Cushion Hitch Cylinder Bore
5.5in
Cushion Hitch Cylinder Stroke
9.9in
Scraper Circuit Flow
66gal/min
Secondary Steering Circuit Flow
10.3gal/min
Steering Circuit Flow
61.8gal/min
Steering Cylinder - Bore
5in
Steering Cylinder - Stroke
44.4in
Bowl Cylinder Bore
5.5in
Bowl Cylinder Stroke
33.3in
Apron Cylinder Bore
5.9in
Apron Cylinder Stroke
22.2in
Ejector Cylinder Bore
5.5in
Ejector Cylinder Stroke
61in

Steering

Steering Angle - Right
85º
Steering Angle - Left
82º
Steering Angle - Right
85º
Steering Angle - Left
82º

Weights - Machines Meeting U.S. EPA Tier 4 Interim/EU Stage IIIB Emission Standards

Push-Pull - Loaded - Based on a Rated Load
141141lb
Push-Pull - Operating Weight - Full Fuel Tanks
82541lb
Push-Pull - Shipping Weight - 10% Fuel
81090lb
Standard - Loaded, Based on a Rated Load
137374lb
Standard - Operating Weight - Full Fuel Tanks
79774lb
Standard - Shipping Weight - 10% fuel
78279lb

Weights - Machines Achieving Prior U.S. EPA Tier 3/EU Stage IIIA Emission Levels

Push-Pull - Loaded - Based on a Rated Load
135597lb
Push-Pull - Operating Weight - Full Fuel Tanks
81996lb
Push-Pull - Shipping Weight - 10% Fuel
80502lb
Standard - Loaded, Based on a Rated Load
136830lb
Standard - Operating Weight - Full Fuel Tanks
79230lb
Standard - Shipping Weight - 10% fuel
77735lb

Tractor Engine - Prior U.S. EPA Tier 3/EU Stage IIIA Configuration*

Bore
5.1in
Displacement
763in³
Maximum Power - All Gears - ISO 14396
407HP
Maximum Power Reference Engine Speed
1700r/min
Stroke
6.2in
Tractor Engine
Cat® C13 ACERT™