621H

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.


SPECIFICATIONS
Engine
Maximum Power 407 HP
Tractor Cat® C13 ACERT™


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


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


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


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


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


Service Refill Capacities - Tractor
Engine Crankcase 8.75 gal (US)
Windshield Washer Reservoir 1.3 gal (US)
Transmission 18.5 gal (US)
Differential 45.8 gal (US)
Final Drive - Each 5 gal (US)
Cooling System 17 gal (US)
Hydraulic Reservoir 22 gal (US)


Service Refill Capacities - Scraper
Fuel Tank 201.6 gal (US)
Non-Powered Wheel 1.1 gal (US)


Standards
Standards Standards


Tractor Engine - U.S. EPA Tier 4 Interim/EU Stage IIIB
Bore 5.1 in
Displacement 763 in³
Maximum Power - All Gears - ISO 14396 407 HP
Maximum Power Reference Engine Speed 1700 r/min
Stroke 6.2 in
Tractor Engine Cat® C13 ACERT™


Tractor Engine - Prior U.S. EPA Tier 3/EU Stage IIIA Configuration*
Bore 5.1 in
Displacement 763 in³
Maximum Power - All Gears - ISO 14396 407 HP
Maximum Power Reference Engine Speed 1700 r/min
Stroke 6.2 in
Tractor Engine Cat® C13 ACERT™


Weights - Machines Meeting U.S. EPA Tier 4 Interim/EU Stage IIIB Emission Standards
Push-Pull - Loaded - Based on a Rated Load 141141 lb
Push-Pull - Operating Weight - Full Fuel Tanks 82541 lb
Push-Pull - Shipping Weight - 10% Fuel 81090 lb
Standard - Loaded, Based on a Rated Load 137374 lb
Standard - Operating Weight - Full Fuel Tanks 79774 lb
Standard - Shipping Weight - 10% fuel 78279 lb


Weights - Machines Achieving Prior U.S. EPA Tier 3/EU Stage IIIA Emission Levels
Push-Pull - Loaded - Based on a Rated Load 135597 lb
Push-Pull - Operating Weight - Full Fuel Tanks 81996 lb
Push-Pull - Shipping Weight - 10% Fuel 80502 lb
Standard - Loaded, Based on a Rated Load 136830 lb
Standard - Operating Weight - Full Fuel Tanks 79230 lb
Standard - Shipping Weight - 10% fuel 77735 lb