621K Wheel Tractor-Scraper

621K Wheel Tractor-Scraper

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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 ...
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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
Width - Rear Tire Centers
90.2in
Width - Overall Machine - Ladder Down
149.2in
Length - Overall Machine - Standard
551.8in
Length - Maximum (Push-Pull)
613.2in

Safety Criteria Compliance Standards

Reverse Alarm
ISO 9533:2010
Falling Object Protective Structure (FOPS)
ISO 3449:2005 Level II
Brakes
ISO 3450:1996
Rollover Protection Structure (ROPS)
ISO 3471:2008 for up to 17 084 kg (37,664 lb)
Seat Belt
SAE J386:JUN1985
Steering System
ISO 5010:2007

Cab

ROPS/FOPS
Meets SAE and ISO standards
Exterior Sound Level
The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).

Service Refill Capacities

Transmission System
24.76gal (US)
Hydraulic System
21.926gal (US)
Fuel Tank
216.09gal (US)
Diesel Exhaust Fluid
8.057gal (US)
Crankcase
8.08gal (US)
Cooling System
11.89gal (US)

Engine

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
Rated Engine RPM - Tractor
2000r/min

General

Width - Cut
10.3ft
Top Speed - Loaded
33.5mile/h
Tires - Tractor Drive
33.25R29**E3
Tires - Scraper
33.25R29**E3
Scraper Capacity - Struck
17.1yd³
Scraper Capacity - Heaped
24yd³
Rated Load
26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Overall Width
11.71ft
Overall Shipping Height
13.22ft
Maximum Depth of Spread
21.3in
Maximum Depth of Cut
12.4in
Fuel Tank Refill Capacity - Scraper
201gal (US)
180° Curb-to-Curb Turning Width
38.71ft

Push-Pull

Operating Weight - Empty
80630lb
Overall Length - With Bail Down
51.1ft

Non Push-Pull

Operating Weight - Empty
79787lb
Overall Length
45.9ft

Travel Speeds - Runout

Transmission Gear - Eighth
33.5mile/h
Transmission Gear - Fifth
13.6mile/h
Transmission Gear - First
3.1mile/h
Transmission Gear - Fourth
10.1mile/h
Transmission Gear - Reverse
5.7mile/h
Transmission Gear - Second
5.5mile/h
Transmission Gear - Seventh
24.8mile/h
Transmission Gear - Sixth
18.4mile/h
Transmission Gear - Third
7.5mile/h

Implement Cycle Times

Apron Lower
3.8s
Apron Raise
2.95s
Bail Lower
3.2s
Bail Raise
1.8s
Bowl Lower
3.5s
Bowl Raise
3s
Ejector Extend
5.2s
Ejector Retract
6.7s

PRODUCTIVITY

PRODUCTIVITY
  • 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.

OPERATOR COMFORT AND CONTROL

OPERATOR COMFORT AND CONTROL
  • 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.

BUILT-IN SAFETY

BUILT-IN 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.

EASE OF OPERATIONS

EASE OF OPERATIONS
  • 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.

CAT TECHNOLOGY

CAT TECHNOLOGY
  • 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).

EFFICIENCY

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.

Standard Equipment:

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
    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
    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
    Service Instructions
    • Film arrangement - U.S. (ANSI)
    • Film arrangement - International (ISO)