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621K Wheel Tractor-Scraper

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.

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

Length - Maximum (Push-Pull)

613.2in

Length - Overall Machine - Standard

551.8in

Width - Rear Tire Centers

90.2in

Width - Overall Machine - Ladder Down

149.2in

General

Maximum Depth of Cut

12.4in

Maximum Depth of Spread

21.3in

180° Curb-to-Curb Turning Width

38.71ft

Scraper Capacity - Struck

17.1yd³

Tires - Scraper

33.25R29**E3

Overall Width

11.71ft

Overall Shipping Height

13.22ft

Width - Cut

10.3ft

Tires - Tractor Drive

33.25R29**E3

Top Speed - Loaded

33.5mile/h

Fuel Tank Refill Capacity - Scraper

201gal (US)

Scraper Capacity - Heaped

24yd³

Rated Load

26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)

Engine

Rated Engine RPM - Tractor

2000r/min

Engine Model - Tractor

Cat C13

Flywheel Power - Tractor

407HP

Note

Cat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.

Service Refill Capacities

Hydraulic System

21.926gal (US)

Cooling System

11.89gal (US)

Fuel Tank

216.09gal (US)

Crankcase

8.08gal (US)

Diesel Exhaust Fluid

8.057gal (US)

Transmission System

24.76gal (US)

Non Push-Pull

Overall Length

45.9ft

Operating Weight - Empty

79787lb

Push-Pull

Operating Weight - Empty

80630lb

Overall Length - With Bail Down

51.1ft

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).

Safety Criteria Compliance Standards

Brakes

ISO 3450:1996

Seat Belt

SAE J386:JUN1985

Steering System

ISO 5010:2007

Reverse Alarm

ISO 9533:2010

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

Travel Speeds - Runout

Transmission Gear - Sixth

18.4mile/h

Transmission Gear - Fifth

13.6mile/h

Transmission Gear - Reverse

5.7mile/h

Transmission Gear - Second

5.5mile/h

Transmission Gear - Third

7.5mile/h

Transmission Gear - First

3.1mile/h

Transmission Gear - Eighth

33.5mile/h

Transmission Gear - Fourth

10.1mile/h

Transmission Gear - Seventh

24.8mile/h

Implement Cycle Times

Bail Lower

3.2s

Bail Raise

1.8s

Apron Lower

3.8s

Apron Raise

2.95s

Ejector Extend

5.2s

Ejector Retract

6.7s

Bowl Raise

3s

Bowl Lower

3.5s

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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