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.
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Tractor Engine
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- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
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Scraper Bowl
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- Scraper Capacity - Heaped
- 24yd³
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Transmission
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- Top Speed - Loaded
- 33.5mile/h
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Dimensions
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- 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 - Overall Machine - Standard
- 551.8in
- Length - Maximum (Push-Pull)
- 613.2in
- Width - Overall Machine - Ladder Down
- 149.2in
- Width - Rear Tire Centers
- 90.2in
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General
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- Overall Shipping Height
- 13.22ft
- Overall Width
- 11.75ft
- Scraper Capacity - Heaped
- 24yd³
- Fuel Tank Refill Capacity - Scraper
- 216.1gal (US)
- Tires - Scraper
- 33.25R29**E3
- Width - Cut
- 10.3ft
- Maximum Depth of Spread
- 21.3in
- Top Speed - Loaded
- 33.5mile/h
- Rated Load
- 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
- 180° Curb-to-Curb Turning Width
- 38.71ft
- Scraper Capacity - Struck
- 17.1yd³
- Maximum Depth of Cut
- 12.4in
- Tires - Tractor Drive
- 33.25R29**E3
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Engine
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- 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.
- Rated Engine RPM - Tractor
- 2000r/min
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Service Refill Capacities
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- Hydraulic System
- 21.926gal (US)
- Crankcase
- 8.08gal (US)
- Transmission System
- 24.76gal (US)
- Cooling System
- 11.89gal (US)
- Fuel Tank
- 216.09gal (US)
- Diesel Exhaust Fluid
- 8.057gal (US)
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Non Push-Pull
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- Operating Weight - Empty
- 79787lb
- Overall Length
- 45.9ft
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Push-Pull
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- Overall Length - With Bail Down
- 51.1ft
- Operating Weight - Empty
- 80630lb
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Cab
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- 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
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Safety Criteria Compliance Standards
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- 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
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Travel Speeds - Runout
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- Transmission Gear - Seventh
- 24.8mile/h
- Transmission Gear - Fifth
- 13.6mile/h
- Transmission Gear - First
- 3.1mile/h
- Transmission Gear - Sixth
- 18.4mile/h
- Transmission Gear - Second
- 5.5mile/h
- Transmission Gear - Third
- 7.5mile/h
- Transmission Gear - Fourth
- 10.1mile/h
- Transmission Gear - Eighth
- 33.5mile/h
- Transmission Gear - Reverse
- 5.7mile/h
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Implement Cycle Times
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- Apron Raise
- 2.95s
- Bowl Raise
- 3s
- Ejector Retract
- 6.7s
- Bowl Lower
- 3.5s
- Apron Lower
- 3.8s
- Ejector Extend
- 5.2s
- Bail Lower
- 3.2s
- Bail Raise
- 1.8s
Standard Equipment:
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Note
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- Standard and optional equipment may vary. Consult your Cat dealer for details.
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Power Train - Tractor
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- 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
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Power Train - Scraper
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- Braking system: - Primary and secondary, wet disc, hydraulic
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Electrical - Tractor
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- 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
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Electrical - Scraper
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- Alarm, backup
- Lighting system: - Brake lights, LED - Turn signals with hazard function, LED
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Operator Environment - Tractor
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- 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
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Fluids
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- Extended Life Coolant to -37° C (-34° F)
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Other Standard Equipment - Tractor
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- 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
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Other Standard Equipment - Scraper
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- 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:
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Note
-
- Standard and optional equipment may vary. Consult your Cat dealer for details.
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Steering Arrangements
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- Secondary Steering Arrangement
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Integrated Technologies
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- Sequence Assist Arrangement
- Load Assist
- Cat Grade Control with Load Assist
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Work Light Attachments
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- HID work lights
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Ambient Capability Arrangements
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- Cooling, high ambient HRC
- Cooling, low ambient HRC
- Cooling, high ambient LRC
- Cooling, low ambient LRC
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Other Attachments
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- Camera arrangement - WAVS
- Steering lock - external
- Cab beacon
- Air horn
- Air horn and beacon
- Fender, scraper
- Guard, overflow
- Wiring group
- Year of manufacture plate
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Service Instructions
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- Film arrangement - U.S. (ANSI)
- Film arrangement - International (ISO)
