621 Wheel Tractor-Scraper
Our wheel tractor-scrapers have long been considered the basic method of moving volumes of material, and the Cat® 621 Wheel Tractor-Scraper is no exception. Known for its ability to be ...
Tractor Engine
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
Scraper Bowl
- Scraper Capacity - Heaped
- 24yd³
Transmission
- Top Speed - Loaded
- 33.5mile/h
Dimensions
- Width - Overall Machine
- 141.1in
- Width - Tractor
- 133.1in
- Width - Inside of Bowl
- 120in
- Width - Outside Rear Tires
- 128.9in
- Height - Overall Shipping
- 158.6in
- Height - Top of Cab
- 142.2in
- Ground Clearance - Tractor
- 21.9in
- Front of Tractor to Front Axle
- 122.8in
- Axle to Vertical Hitch Pin
- 21.3in
- Height - Scraper Blade Maximum
- 20.5in
- Wheel Base
- 314.9in
- Rear Axle - Rear of Machine
- 114.1in
- Length - Maximum (Push-Pull)
- 613.2in
- Length - Overall Machine - Standard
- 551.8in
- Width - Overall Machine - Ladder Down
- 149.2in
- Width - Rear Tire Centers
- 90.2in
Service Refill Capacities
- Diesel Exhaust Fluid
- 8.057gal (US)
- Fuel Tank
- 216.09gal (US)
- Cooling System
- 11.89gal (US)
- Transmission System
- 24.76gal (US)
- Crankcase
- 8.08gal (US)
- Hydraulic System
- 21.926gal (US)
Engine
- Rated Engine RPM - Tractor
- 2000r/min
- Note
- Cat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
- Flywheel Power - Tractor
- 407HP
- Engine Model - Tractor
- Cat C13
General
- Tires - Tractor Drive
- 33.25R29**E3
- Maximum Depth of Cut
- 12.4in
- Scraper Capacity - Struck
- 17.1yd³
- 180° Curb-to-Curb Turning Width
- 38.71ft
- Rated Load
- 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
- Top Speed - Loaded
- 33.5mile/h
- Maximum Depth of Spread
- 21.3in
- Width - Cut
- 10.3ft
- Tires - Scraper
- 33.25R29**E3
- Fuel Tank Refill Capacity - Scraper
- 216.1gal (US)
- Overall Width
- 11.75ft
- Scraper Capacity - Heaped
- 24yd³
- Overall Shipping Height
- 13.22ft
Non Push-Pull
- Operating Weight - Empty
- 79787lb
- Overall Length
- 45.9ft
Push-Pull
- Overall Length - With Bail Down
- 51.1ft
- Operating Weight - Empty
- 80630lb
Cab
- Exterior Sound Level
- The exterior sound power level for the standard machine (ISO 6393:2008) is 118 dB(A).
- ROPS/FOPS
- Meets SAE and ISO standards
Safety Criteria Compliance Standards
- Rollover Protection Structure (ROPS)
- ISO 3471:2008 for up to 17 084 kg (37,664 lb)
- Brakes
- ISO 3450:1996
- Reverse Alarm
- ISO 9533:2010
- Falling Object Protective Structure (FOPS)
- ISO 3449:2005 Level II
- Seat Belt
- SAE J386:JUN1985
- Steering System
- ISO 5010:2007
Travel Speeds - Runout
- Transmission Gear - Seventh
- 24.8mile/h
- Transmission Gear - Fifth
- 13.6mile/h
- Transmission Gear - First
- 3.1mile/h
- Transmission Gear - Sixth
- 18.4mile/h
- Transmission Gear - Second
- 5.5mile/h
- Transmission Gear - Third
- 7.5mile/h
- Transmission Gear - Fourth
- 10.1mile/h
- Transmission Gear - Eighth
- 33.5mile/h
- Transmission Gear - Reverse
- 5.7mile/h
Implement Cycle Times
- Apron Raise
- 2.95s
- Bowl Raise
- 3s
- Ejector Retract
- 6.7s
- Bowl Lower
- 3.5s
- Apron Lower
- 3.8s
- Ejector Extend
- 5.2s
- Bail Lower
- 3.2s
- Bail Raise
- 1.8s
BE MORE PRODUCTIVE
- BE MORE PRODUCTIVE
- Up to 8% improvement in productivity.
- Advanced Productivity Electronic Control System (APECS) allows
the engine and transmission to communicate on a high level. This communication allows the machine to better utilize the power
and torque the engine is producing. The net result is moving more
material. - Use Ground Speed Control to set the desired top speed and the
machine will find the gear that works best for the engine and the
transmission, providing a lower fuel burn. - The Machine Speed Limit feature replaces Top Gear Selection.
- Auto-Stall assists in quickly bringing the transmission to an
operating temperature at start-up when the machine is working in a
cold climate region. - Boost productivity with the Payload Estimator feature (optional
attachment). Payload Estimator is an automatic feature when
ordered with Sequence Assist. - Cat®Payload Estimator for scrapers is an earthmoving solution for
optimal payload and jobsite efficiency. Payload Estimator achieves on-the-go weighing by using bowl lift cylinder pressure during the
loaded haul segment. Payload Estimator is optimized to be used
with Sequence Assist, which provides increased productivity with
less operator effort.
WORK IN COMFORT
- WORK IN COMFORT
- Reduce up to 14 individual operator commands per cycle with Sequence Assist (optional attachment).
- Steer with less effort using the newly designed high-pressure
steering system. - Enjoy interior improvements and a more ergonomic work environment
with a 21% larger cab than the G Series cab. - Intuitive, ergonomic controls keep operators focused on their work.
- Maintain desired cab temperature with automatic temperature
control.
DESIGNED FOR SAFETY
- DESIGNED FOR SAFETY
- Get in and out of the cab easier with the new powered access
ladder system (optional attachment). - Enhance an operator’s awareness of site surroundings with the
optional Work Area Vision System (WAVS). - Seat belt indicator provides visual and audible alerts when the seat
belt is not in use. - Advanced Cushion Hitch allows the cushion hitch to prevent end
stroke by having the ability to predict end stroke events and manage
the rate of dampening, resulting in reduced hitch maintenance and
improved operator ride in rough conditions.
- Get in and out of the cab easier with the new powered access
EASY TO OPERATE
- EASY TO OPERATE
- The spacious cab features easy, intuitive controls and excellent
visibility. The cab provides a comfortable working environment for
all-day operation. - Cat Advanced Ride Management (ARM) seat suspension reduces
end stroke movement of the load cylinder for a smoother ride. - Engine overspeed protection will automatically engage with no
operator input when the machine is in eighth gear. The machine
will assist in slowing the machine speed by canceling the throttle
command and engaging the engine compression brake.
- The spacious cab features easy, intuitive controls and excellent
INTEGRATED CAT TECHNOLOGIES
- INTEGRATED CAT TECHNOLOGIES
- Monitor, manage, and enhance jobsite operations.
- Hit target grade faster and more accurately with Cat GRADE technologies. Finish jobs in fewer passes and with less operator effort, saving you time and helping to increase profit.
- Product Link™ collects machine data that can be viewed online through web and mobile applications (optional attachment).
- Access information anytime, anywhere with Vision Link®– use it to make informed decisions that boost productivity, lower costs, simplify maintenance, and improve safety and security on your jobsite.
- Shorten the learning curve for inexperienced operators with Load Assist (optional attachment).
EXECUTE EFFICIENCY
- EXECUTE EFFICIENCY
- The new tractor hydraulic on-demand fan helps assist in lower fuel consumption.
- The Cat C13 tractor engine meets U.S. EPA Tier 4 Final or EU Stage V emission standards, contributing to lower fuel consumption.
- Using draft-arm overflow guards diverts material away from the bowl, preventing material from getting caught between the draft arms and the bowl sides.
- Cat Grade Control (optional attachment) intelligently ensures the machine does not cut below grade in a cut area or overfill in the fill area.