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Caterpillar

621K Wheel Tractor-Scraper

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

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.

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Exterior

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Interior

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Features

Details

Specifications

Spec Value
Maximum Depth of Cut 12.4 in 315 mm
Maximum Depth of Spread 21.3 in 540 mm
180° Curb-to-Curb Turning Width 38.71 ft 11.8 m
Scraper Capacity – Struck 17.1 yd³ 13 m³
Tires – Scraper 33.25R29**E3 33.25R29**E3
Overall Width 11.71 ft 3.57 m
Overall Shipping Height 13.22 ft 4.03 m
Width – Cut 10.3 ft 3.14 m
Tires – Tractor Drive 33.25R29**E3 33.25R29**E3
Top Speed – Loaded 33.5 mile/h 53.9 km/h
Fuel Tank Refill Capacity – Scraper 201 gal (US) 763 l
Scraper Capacity – Heaped 24 yd³ 18.4 m³
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)
Spec Value
Rated Engine RPM – Tractor 2000 r/min 2000 r/min
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.
Spec Value
Flywheel Power – Tractor/Scraper 304 kW (407 hp) 304 kW (407 hp)
Spec Value
Scraper Capacity – Heaped 24 yd³ 18.4 m³
Spec Value
Top Speed – Loaded 33.5 mile/h 53.9 km/h
Spec Value
Hydraulic System 21.926 gal (US) 83 l
Cooling System 11.89 gal (US) 45 l
Fuel Tank 216.09 gal (US) 818 l
Crankcase 8.08 gal (US) 30.58 l
Diesel Exhaust Fluid 8.057 gal (US) 30.5 l
Transmission System 24.76 gal (US) 93 l
Spec Value
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 – Maximum (Push-Pull) 613.2 in 15576 mm
Length – Overall Machine – Standard 551.8 in 14015 mm
Width – Rear Tire Centers 90.2 in 2290 mm
Width – Overall Machine – Ladder Down 149.2 in 3790 mm
Spec Value
Overall Length 45.9 ft 14.02 m
Operating Weight – Empty 79787 lb 36185 kg
Spec Value
Operating Weight – Empty 80630 lb 36567 kg
Overall Length – With Bail Down 51.1 ft 15.58 m
Spec Value
ROPS/FOPS Meets SAE and ISO standards Meets SAE and ISO standards
Exterior Sound Level The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A). The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
Spec Value
Brakes ISO 3450:1996 ISO 3450:1996
Seat Belt SAE J386:JUN1985 SAE J386:JUN1985
Steering System ISO 5010:2007 ISO 5010:2007
Reverse Alarm ISO 9533:2010 ISO 9533:2010
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)
Falling Object Protective Structure (FOPS) ISO 3449:2005 Level II ISO 3449:2005 Level II
Spec Value
Transmission Gear – Sixth 18.4 mile/h 29.6 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 – Second 5.5 mile/h 8.9 km/h
Transmission Gear – Third 7.5 mile/h 12.1 km/h
Transmission Gear – First 3.1 mile/h 5 km/h
Transmission Gear – Eighth 33.5 mile/h 53.9 km/h
Transmission Gear – Fourth 10.1 mile/h 16.3 km/h
Transmission Gear – Seventh 24.8 mile/h 39.9 km/h
Spec Value
Bail Lower 3.2 s 3.2 s
Bail Raise 1.8 s 1.8 s
Apron Lower 3.8 s 3.8 s
Apron Raise 2.95 s 2.95 s
Ejector Extend 5.2 s 5.2 s
Ejector Retract 6.7 s 6.7 s
Bowl Raise 3 s 3 s
Bowl Lower 3.5 s 3.5 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

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)

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