Tractor Engine
| Flywheel Power - Tractor/Scraper | 304 kW (407 hp) 304 kW (407 hp) |
Open Bowl Scrapers 621
Request A Price Find DealerKey Specs
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- 18.4 m³
- Top Speed - Loaded
- 33.5 mile/h
- 53.9 km/h
Overview
REDFINING YOUR PROFIT POTENTIAL
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.
Benefits
Increased Comfort
Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long
Up To 8% Improved Productivity
Improvements in fuel efficiency and responsive APECS transmission controls deliver more productivity in most applications
Additional Safety
New safety features help operators be more productive and work more efficiently all day long
Features At A Glance
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
- 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
- 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.
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.
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
- 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.
Product Specifications for 621
Scraper Bowl
| Scraper Capacity - Heaped | 24 yd³ 18.4 m³ |
Transmission
| Top Speed - Loaded | 33.5 mile/h 53.9 km/h |
Dimensions
| Width - Overall Machine | 141.1 in 3585 mm |
| Width - Tractor | 133.1 in 3381 mm |
| Width - Inside of Bowl | 120 in 3048 mm |
| Width - Outside Rear Tires | 128.9 in 3275 mm |
| Height - Overall Shipping | 158.6 in 4029 mm |
| Height - Top of Cab | 142.2 in 3612 mm |
| Ground Clearance - Tractor | 21.9 in 557 mm |
| Front of Tractor to Front Axle | 122.8 in 3119 mm |
| Axle to Vertical Hitch Pin | 21.3 in 540 mm |
| Height - Scraper Blade Maximum | 20.5 in 520 mm |
| Wheel Base | 314.9 in 7998 mm |
| Rear Axle - Rear of Machine | 114.1 in 2898 mm |
| Length - Overall Machine - Standard | 551.8 in 14015 mm |
| Length - Maximum (Push-Pull) | 613.2 in 15576 mm |
| Width - Overall Machine - Ladder Down | 149.2 in 3790 mm |
| Width - Rear Tire Centers | 90.2 in 2290 mm |
General
| Overall Shipping Height | 13.22 ft 4.03 m |
| Overall Width | 11.75 ft 3.58 m |
| Scraper Capacity - Heaped | 24 yd³ 18.4 m³ |
| Fuel Tank Refill Capacity - Scraper | 216.1 gal (US) 818 l |
| Tires - Scraper | 33.25R29**E3 33.25R29**E3 |
| Width - Cut | 10.3 ft 3.14 m |
| Maximum Depth of Spread | 21.3 in 540 mm |
| Top Speed - Loaded | 33.5 mile/h 53.9 km/h |
| Rated Load | 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons) 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons) |
| 180° Curb-to-Curb Turning Width | 38.71 ft 11.8 m |
| Scraper Capacity - Struck | 17.1 yd³ 13 m³ |
| Maximum Depth of Cut | 12.4 in 315 mm |
| Tires - Tractor Drive | 33.25R29**E3 33.25R29**E3 |
Engine
| Engine Model - Tractor | Cat C13 Cat C13 |
| Flywheel Power - Tractor | 407 hp 304 kW |
| Note | Cat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards. Cat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards. |
| Rated Engine RPM - Tractor | 2000 r/min 2000 r/min |
Service Refill Capacities
| Hydraulic System | 21.926 gal (US) 83 l |
| Crankcase | 8.08 gal (US) 30.58 l |
| Transmission System | 24.76 gal (US) 93 l |
| Cooling System | 11.89 gal (US) 45 l |
| Fuel Tank | 216.09 gal (US) 818 l |
| Diesel Exhaust Fluid | 8.0572 gal (US) 30.5 l |
Non Push-Pull
| Operating Weight - Empty | 79787 lb 36185 kg |
| Overall Length | 45.9 ft 14.02 m |
Push-Pull
| Overall Length - With Bail Down | 51.1 ft 15.58 m |
| Operating Weight - Empty | 80630 lb 36567 kg |
Cab
| Exterior Sound Level | The exterior sound power level for the standard machine (ISO 6393:2008) is 118 dB(A). The exterior sound power level for the standard machine (ISO 6393:2008) is 118 dB(A). |
| ROPS/FOPS | Meets SAE and ISO standards 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) ISO 3471:2008 for up to 17 084 kg (37,664 lb) |
| Brakes | ISO 3450:1996 ISO 3450:1996 |
| Reverse Alarm | ISO 9533:2010 ISO 9533:2010 |
| Falling Object Protective Structure (FOPS) | ISO 3449:2005 Level II ISO 3449:2005 Level II |
| Seat Belt | SAE J386:JUN1985 SAE J386:JUN1985 |
| Steering System | ISO 5010:2007 ISO 5010:2007 |
Travel Speeds - Runout
| Transmission Gear - Seventh | 24.8 mile/h 39.9 km/h |
| Transmission Gear - Fifth | 13.6 mile/h 21.9 km/h |
| Transmission Gear - First | 3.1 mile/h 5 km/h |
| Transmission Gear - Sixth | 18.4 mile/h 29.6 km/h |
| Transmission Gear - Second | 5.5 mile/h 8.9 km/h |
| Transmission Gear - Third | 7.5 mile/h 12.1 km/h |
| Transmission Gear - Fourth | 10.1 mile/h 16.3 km/h |
| Transmission Gear - Eighth | 33.5 mile/h 53.9 km/h |
| Transmission Gear - Reverse | 5.7 mile/h 9.2 km/h |
Implement Cycle Times
| Apron Raise | 2.95 s 2.95 s |
| Bowl Raise | 3 s 3 s |
| Ejector Retract | 6.7 s 6.7 s |
| Bowl Lower | 3.5 s 3.5 s |
| Apron Lower | 3.8 s 3.8 s |
| Ejector Extend | 5.2 s 5.2 s |
| Bail Lower | 3.2 s 3.2 s |
| Bail Raise | 1.8 s 1.8 s |
621 Standard Equipment
NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
POWER TRAIN - TRACTOR
- Cat C13 engine with MEUI™
- Cat engine brake
- Electric start, 24 Volt
- Air cleaner, dry type with precleaner
- Fan, hydraulic
- Ground level engine shutdown
- Radiator, aluminum unit core, 9 fins per inch
- Guard, crankcase
- Muffler (only for less or non-regulated regions engine arrangement only)
- Starting aid, ether
- Braking system: - Primary and secondary, wet disc, hydraulic - Parking, hydraulic-released, spring-applied - Throttle lock
- Transmission: - 8-speed planetary power shift - ECPC control - APECS software - Programmable top gear selection - Transmission hold - Differential lock - Guard, power train - Standard tire spin reduction - Ground speed control - Machine speed limit - Differential lock protection
POWER TRAIN - SCRAPER
- Braking system: - Primary and secondary, wet disc, hydraulic
ELECTRICAL - TRACTOR
- Alternator, 150 Amp
- Batteries (4), 12V, 1,000 CCA, maintenance free, high output
- Electrical system, 24V
- Lighting system: - Headlights, halogen - Turn signals with hazard function, LED floodlights, (2) cutting edge (1) bowl, halogen side vision (2)
- Starting/charging receptacle
ELECTRICAL - SCRAPER
- Alarm, backup
- Lighting system: - Brake lights, LED - Turn signals with hazard function, LED
OPERATOR ENVIRONMENT - TRACTOR
- HVAC system, heat, AC, defrost
- Thermostat control of HVAC system
- Coat hook
- Lunchbox platform with holding strap
- Diagnostic connection (2)
- 12V power ports (2)
- Differential lock (1)
- Dome courtesy light
- Horn, electric
- T-Handle implement control
- Mirror, rearview
- Radio ready
- ROPS/FOPS cab, pressurized
- Keypad switches: - Throttle lock - Wipers/washers - Hazard lights - Retarding level select - Work lights on, off - Information mode on Messenger Display
- Safety tab rocker switches
- Seat belt, static two-piece
- Seat, Cat Advanced Ride Management (ARM), Cat Comfort Series 3, rotates 30 degrees
- Steering wheel, tilt, telescoping, padded
- Windows, right side emergency egress
- Windows, sliding
- Windows, laminated, zipped in
- Windshield wipers, front and rear windows, includes washers
- Door lock
- Messenger Display
- Gauges, warnings include: - Coolant temperature - Engine oil temperature - Hydraulic oil temperature - DPF temperature - Fuel level - Park brake - Implement lockout - Brake system - Regeneration required - Throttle lock - System voltage - Secondary steering - Bail down - Ejector auto - Differential lock - Apron float - Transmission hold - Cushion hitch - High beam lights - Action lamp - Engine speed, rpm - Gear selection - DEF fill levels
FLUIDS
- Extended Life Coolant to -37° C (-34° F)
OTHER STANDARD EQUIPMENT - TRACTOR
- Advanced cushion hitch
- Accumulators (cushion hitch) with Canadian Registration Number (CRN)
- Fast oil change
- Fenders, non-metallic
- Heater, engine coolant 120V
- Rims (2)
- Tow pin, front
- Vandalism locks
- Heater, engine coolant 120V
OTHER STANDARD EQUIPMENT - SCRAPER
- Bowl: - 18.4 m3 (24 yd3), heaped - 14.1 m3 (18.4 yd3), struck
- Vandalism locks
- Hydraulic position sensing cylinders (bowl lift and apron)
621 Optional Equipment
NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
STEERING ARRANGEMENTS
- Secondary Steering Arrangement
INTEGRATED TECHNOLOGIES
- Sequence Assist Arrangement
- Load Assist
- Cat Grade Control with Load Assist
WORK LIGHT ATTACHMENTS
- HID work lights
AMBIENT CAPABILITY ARRANGEMENTS
- Cooling, high ambient HRC
- Cooling, low ambient HRC
- Cooling, high ambient LRC
- Cooling, low ambient LRC
OTHER ATTACHMENTS
- Camera arrangement - WAVS
- Steering lock - external
- Cab beacon
- Air horn
- Air horn and beacon
- Fender, scraper
- Guard, overflow
- Wiring group
- Year of manufacture plate
SERVICE INSTRUCTIONS
- Film arrangement - U.S. (ANSI)
- Film arrangement - International (ISO)
See how 621 compares against frequently compared products.
Wheel Tractor-Scrapers
621
Selected
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- 18.4 m³
- Top Speed - Loaded
- 33.5 mile/h
- 53.9 km/h
Wheel Tractor-Scrapers
621
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- 18.4 m³
- Top Speed - Loaded
- 33.5 mile/h
- 53.9 km/h
Wheel Tractor-Scrapers
621
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- 18.4 m³
- Top Speed - Loaded
- 33.5 mile/h
- 53.9 km/h
assignment Product Brochures and More Are Ready to Download!
Caterpillar product brochures and other informational documents are available for your growing business.
Media Gallery
Photos
Videos
360 View
621
621
621
621
621
Wheel Tractor-Scraper K Series
Wheel Tractor-Scraper K-Series Operator Testimonial
