621

621 Tier 4 Stage V 2023 Global

Overview

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 push-loaded and high travel speeds, it’s always an earthmover’s first tool of choice when working in challenging load areas. With an open bowl and a single engine, this machine is designed to handle a wide range of material types ranging from sand to ripped rock 609.6 mm (24 ") or less in size.

Specifications

Units: 
Flywheel Power - Tractor/Scraper 304 kW (407 hp)
Scraper Capacity - Heaped
Top Speed - Loaded
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Benefits & Features

BE MORE PRODUCTIVE

WORK IN COMFORT

DESIGNED FOR SAFETY

  September 9, 2024

Specifications

Units: 
General
Overall Shipping Height
Overall Width
Scraper Capacity - Heaped
Fuel Tank Refill Capacity - Scraper
Tires - Scraper 33.25R29**E3
Width - Cut
Maximum Depth of Spread
Top Speed - Loaded
Rated Load 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
180° Curb-to-Curb Turning Width
Scraper Capacity - Struck
Maximum Depth of Cut
Tires - Tractor Drive 33.25R29**E3
Engine
Engine Model - Tractor Cat C13
Flywheel Power - Tractor
Note Cat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Rated Engine RPM - Tractor
Tractor Engine
Flywheel Power - Tractor/Scraper 304 kW (407 hp)
Scraper Bowl
Scraper Capacity - Heaped
Transmission
Top Speed - Loaded
Service Refill Capacities
Hydraulic System
Crankcase
Transmission System
Cooling System
Fuel Tank
Diesel Exhaust Fluid
Dimensions
Width - Overall Machine
Width - Tractor
Width - Inside of Bowl
Width - Outside Rear Tires
Height - Overall Shipping
Height - Top of Cab
Ground Clearance - Tractor
Front of Tractor to Front Axle
Axle to Vertical Hitch Pin
Height - Scraper Blade Maximum
Wheel Base
Rear Axle - Rear of Machine
Length - Overall Machine - Standard
Length - Maximum (Push-Pull)
Width - Overall Machine - Ladder Down
Width - Rear Tire Centers
Non Push-Pull
Operating Weight - Empty
Overall Length
Push-Pull
Overall Length - With Bail Down
Operating Weight - Empty
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
Transmission Gear - Fifth
Transmission Gear - First
Transmission Gear - Sixth
Transmission Gear - Second
Transmission Gear - Third
Transmission Gear - Fourth
Transmission Gear - Eighth
Transmission Gear - Reverse
Implement Cycle Times
Apron Raise
Bowl Raise
Ejector Retract
Bowl Lower
Apron Lower
Ejector Extend
Bail Lower
Bail Raise

Benefits & Features

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.

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.

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.

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)

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)

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