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Caterpillar

621 Wheel Tractor-Scraper

Flywheel Power - Tractor/Scraper

304 kW (407 hp)

Scraper Capacity - Heaped

24 yd³

Top Speed - Loaded

33.5 mile/h

Overview

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.

Photos

Videos

  • Wheel Tractor-Scraper K-Series
  • Wheel Tractor-Scraper K-Series Operator Testimonial

360° View

Exterior

360° Exterior view. Double click on the image to zoom in on any area of the product.

Interior

360° interior view. Double click on the image to zoom in on any area of the product.

Specifications

  • General
    Spec Value
    Overall Shipping Height 13.22 ft
    Overall Width 11.75 ft
    Scraper Capacity - Heaped 24 yd³
    Fuel Tank Refill Capacity - Scraper 216.1 gal (US)
    Tires - Scraper 33.25R29**E3
    Width - Cut 10.3 ft
    Maximum Depth of Spread 21.3 in
    Top Speed - Loaded 33.5 mile/h
    Rated Load 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
    180° Curb-to-Curb Turning Width 38.71 ft
    Scraper Capacity - Struck 17.1 yd³
    Maximum Depth of Cut 12.4 in
    Tires - Tractor Drive 33.25R29**E3
  • Engine
    Spec Value
    Engine Model - Tractor Cat C13
    Flywheel Power - Tractor 407 HP
    Note 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
  • Tractor Engine
    Spec Value
    Flywheel Power - Tractor/Scraper 304 kW (407 hp)
  • Scraper Bowl
    Spec Value
    Scraper Capacity - Heaped 24 yd³
  • Transmission
    Spec Value
    Top Speed - Loaded 33.5 mile/h
  • Service Refill Capacities
    Spec Value
    Hydraulic System 21.926 gal (US)
    Crankcase 8.08 gal (US)
    Transmission System 24.76 gal (US)
    Cooling System 11.89 gal (US)
    Fuel Tank 216.09 gal (US)
    Diesel Exhaust Fluid 8.057 gal (US)
  • Dimensions
    Spec Value
    Width - Overall Machine 141.1 in
    Width - Tractor 133.1 in
    Width - Inside of Bowl 120 in
    Width - Outside Rear Tires 128.9 in
    Height - Overall Shipping 158.6 in
    Height - Top of Cab 142.2 in
    Ground Clearance - Tractor 21.9 in
    Front of Tractor to Front Axle 122.8 in
    Axle to Vertical Hitch Pin 21.3 in
    Height - Scraper Blade Maximum 20.5 in
    Wheel Base 314.9 in
    Rear Axle - Rear of Machine 114.1 in
    Length - Overall Machine - Standard 551.8 in
    Length - Maximum (Push-Pull) 613.2 in
    Width - Overall Machine - Ladder Down 149.2 in
    Width - Rear Tire Centers 90.2 in
  • Non Push-Pull
    Spec Value
    Operating Weight - Empty 79787 lb
    Overall Length 45.9 ft
  • Push-Pull
    Spec Value
    Overall Length - With Bail Down 51.1 ft
    Operating Weight - Empty 80630 lb
  • Cab
    Spec Value
    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
    Spec Value
    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
    Spec Value
    Transmission Gear - Seventh 24.8 mile/h
    Transmission Gear - Fifth 13.6 mile/h
    Transmission Gear - First 3.1 mile/h
    Transmission Gear - Sixth 18.4 mile/h
    Transmission Gear - Second 5.5 mile/h
    Transmission Gear - Third 7.5 mile/h
    Transmission Gear - Fourth 10.1 mile/h
    Transmission Gear - Eighth 33.5 mile/h
    Transmission Gear - Reverse 5.7 mile/h
  • Implement Cycle Times
    Spec Value
    Apron Raise 2.95 s
    Bowl Raise 3 s
    Ejector Retract 6.7 s
    Bowl Lower 3.5 s
    Apron Lower 3.8 s
    Ejector Extend 5.2 s
    Bail Lower 3.2 s
    Bail Raise 1.8 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

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)