621

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 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.

621

621

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.
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.

Flywheel Power - Tractor/Scraper

304 kW (407 hp)

Scraper Capacity - Heaped

24 yd³ / 18.4 m³

Top Speed - Loaded

33.5 mile/h / 53.9 km/h
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  • Specifications
  • Standard / Optional Features
  • Overview
    • Long Name -621 Wheel Tractor-Scraper
    • Name -621
    • Brand -Caterpillar
    • Status -Current
  • General
    • Maximum Depth of Cut - 12.4 in / 315 mm
    • Fuel Tank Refill Capacity - Scraper - 216.1 gal (US) / 818 l
    • 180° Curb-to-Curb Turning Width - 38.71 ft / 11.8 m
    • Scraper Capacity - Heaped - 24 yd³ / 18.4 m³
    • Overall Width - 11.75 ft / 3.58 m
    • Maximum Depth of Spread - 21.3 in / 540 mm
    • Overall Shipping Height - 13.22 ft / 4.03 m
    • Tires - Tractor Drive - 33.25R29**E3
    • Width - Cut - 10.3 ft / 3.14 m
    • Scraper Capacity - Struck - 17.1 yd³ / 13 m³
    • Top Speed - Loaded - 33.5 mile/h / 53.9 km/h
    • Tires - Scraper - 33.25R29**E3
    • Rated Load - 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
  • Engine
    • Note - Cat® C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
    • Flywheel Power - Tractor - 407 hp / 304 kW
    • Rated Engine RPM - Tractor - 2000 r/min / 2000 r/min
    • Engine Model - Tractor - Cat® C13
  • Tractor Engine
    • Flywheel Power - Tractor/Scraper - 304 kW (407 hp)
  • Scraper Bowl
    • Scraper Capacity - Heaped - 24 yd³ / 18.4 m³
  • Transmission
    • Top Speed - Loaded - 33.5 mile/h / 53.9 km/h
  • Service Refill Capacities
    • Fuel Tank - 216.09 gal (US) / 818 l
    • Crankcase - 8.08 gal (US) / 30.58 l
    • Hydraulic System - 21.926 gal (US) / 83 l
    • Diesel Exhaust Fluid - 8.057 gal (US) / 30.5 l
    • Cooling System - 11.89 gal (US) / 45 l
    • Transmission System - 24.76 gal (US) / 93 l
  • 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
    • Width - Overall Machine - Ladder Down - 149.2 in / 3790 mm
    • Length - Overall Machine - Standard - 551.8 in / 14015 mm
    • Length - Maximum (Push-Pull) - 613.2 in / 15576 mm
    • Width - Rear Tire Centers - 90.2 in / 2290 mm
  • Non Push-Pull
    • Overall Length - 45.9 ft / 14.02 m
    • Operating Weight - Empty - 79787 lb / 36185 kg
  • Push-Pull
    • Operating Weight - Empty - 80630 lb / 36567 kg
    • Overall Length - With Bail Down - 51.1 ft / 15.58 m
  • 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
    • Reverse Alarm - ISO 9533:2010
    • Brakes - ISO 3450:1996
    • Rollover Protection Structure (ROPS) - ISO 3471:2008 for up to 17 084 kg (37,664 lb)
    • Falling Object Protective Structure (FOPS) - ISO 3449:2005 Level II
    • Steering System - ISO 5010:2007
    • Seat Belt - SAE J386:JUN1985
  • Travel Speeds - Runout
    • Transmission Gear - Eighth - 33.5 mile/h / 53.9 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 - First - 3.1 mile/h / 5 km/h
    • Transmission Gear - Fifth - 13.6 mile/h / 21.9 km/h
    • Transmission Gear - Reverse - 5.7 mile/h / 9.2 km/h
    • Transmission Gear - Seventh - 24.8 mile/h / 39.9 km/h
    • Transmission Gear - Sixth - 18.4 mile/h / 29.6 km/h
    • Transmission Gear - Second - 5.5 mile/h / 8.9 km/h
  • Implement Cycle Times
    • Ejector Retract - 6.7 s / 6.7 s
    • Bail Raise - 1.8 s / 1.8 s
    • Apron Raise - 2.95 s / 2.95 s
    • Apron Lower - 3.8 s / 3.8 s
    • Ejector Extend - 5.2 s / 5.2 s
    • Bowl Raise - 3 s / 3 s
    • Bowl Lower - 3.5 s / 3.5 s
    • Bail Lower - 3.2 s / 3.2 s

    • 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
    • integrated technologies
      • Sequence Assist and Cat Payload Arrangement
    • 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
      • Camera arrangement - WAVS
      • 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
      • Interactive touchscreen vehicle information 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
      • Fender, 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