621K 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.
Tractor Engine
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
Scraper Bowl
- Scraper Capacity - Heaped
- 24 yd³
Transmission
- Top Speed - Loaded
- 33.5 mile/h
Dimensions
- Width - Outside Rear Tires
- 128.9 in
- Width - Overall Machine
- 141.1 ft
- Width - Tractor
- 133.1 ft
- Width - Inside of Bowl
- 120 ft
- Height - Overall Shipping
- 158.6 ft
- Height - Top of Cab
- 142.2 ft
- Ground Clearance - Tractor
- 21.9 ft
- Front of Tractor to Front Axle
- 122.8 ft
- Axle to Vertical Hitch Pin
- 21.3 ft
- Height - Scraper Blade Maximum
- 20.5 ft
- Wheel Base
- 314.9 ft
- Rear Axle - Rear of Machine
- 114.1 ft
- Width - Overall Machine - Ladder Down
- 149.2 in
- Length - Overall Machine - Standard
- 551.8 in
- Width - Rear Tire Centers
- 90.2 in
Service Refill Capacities
- Fuel Tank
- 216.09 gal (US)
- Crankcase
- 8.08 gal (US)
- Cooling System
- 11.89 gal (US)
- Hydraulic System
- 21.926 gal (US)
- Transmission System
- 24.76 gal (US)
General
- Width - Cut
- 10.3 ft
- 180° Curb-to-Curb Turning Width
- 38.71 ft
- Fuel Tank Refill Capacity - Scraper
- 201 gal (US)
- Overall Width
- 11.71 ft
- Maximum Depth of Cut
- 12.4 in
- Tires - Tractor Drive
- 33.25R29**E3
- Scraper Capacity - Struck
- 17.1 yd³
- Scraper Capacity - Heaped
- 24 yd³
- Overall Shipping Height
- 13.22 ft
- Maximum Depth of Spread
- 21.3 in
- Top Speed - Loaded
- 33.5 mile/h
- Tires - Scraper
- 33.25R29**E3
- Rated Load
- 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Cab
- Exterior Sound Level
- The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
- ROPS/FOPS
- Meets SAE and ISO standards
Travel Speeds - Runout
- Transmission Gear - Fifth
- 13.6 mile/h
- Transmission Gear - Third
- 7.5 mile/h
- Transmission Gear - Fourth
- 10.1 mile/h
- Transmission Gear - Reverse
- 5.7 mile/h
- Transmission Gear - First
- 3.1 mile/h
- Transmission Gear - Sixth
- 18.4 mile/h
- Transmission Gear - Seventh
- 24.8 mile/h
- Transmission Gear - Second
- 5.5 mile/h
- Transmission Gear - Eighth
- 33.5 mile/h
Implement Cycle Times
- Bail Lower
- 3.2 s
- Apron Raise
- 2.95 s
- Bowl Raise
- 3 s
- Bail Raise
- 1.8 s
- Ejector Extend
- 5.2 s
- Bowl Lower
- 3.5 s
- Apron Lower
- 3.8 s
- Ejector Retract
- 6.7 s
Safety Criteria Compliance Standards
- Steering System
- ISO 5010:2007
- Falling Object Protective Structure (FOPS)
- ISO 3449:2005 Level II
- Brakes
- ISO 3450:1996
- Reverse Alarm
- ISO 9533:2010
- Seat Belt
- SAE J386:JUN1985
- Rollover Protection Structure (ROPS)
- ISO 3471:2008 for up to 17 084 kg (37,664 lb)
Engine
- Flywheel Power - Tractor
- 407 HP
- Note
- Cat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
