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
Top Speed - Loaded 33.5 mile/h
Width - Overall Machine 141.1 in
Flywheel Power - Tractor/Scraper 304 kW (407 hp)
Scraper Capacity - Heaped 24yd³
Top Speed - Loaded 33.5mile/h
Axle to Vertical Hitch Pin 21.3in
Front of Tractor to Front Axle 122.8in
Ground Clearance - Tractor 21.9in
Height - Overall Shipping 158.6in
Height - Scraper Blade Maximum 20.5in
Height - Top of Cab 142.2in
Length - Maximum (Push-Pull) 613.2in
Length - Overall Machine - Standard 551.8in
Rear Axle - Rear of Machine 114.1in
Wheel Base 314.9in
Width - Inside of Bowl 120in
Width - Outside Rear Tires 128.9in
Width - Overall Machine 141.1in
Width - Overall Machine - Ladder Down 149.2in
Width - Rear Tire Centers 90.2in
Width - Tractor 133.1in
180° Curb-to-Curb Turning Width 38.71ft
Fuel Tank Refill Capacity - Scraper 216.1gal (US)
Maximum Depth of Cut 12.4in
Maximum Depth of Spread 21.3in
Overall Shipping Height 13.22ft
Overall Width 11.75ft
Rated Load 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Scraper Capacity - Heaped 24yd³
Scraper Capacity - Struck 17.1yd³
Tires - Scraper 33.25R29**E3
Tires - Tractor Drive 33.25R29**E3
Top Speed - Loaded 33.5mile/h
Width - Cut 10.3ft
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
Cooling System 11.89gal (US)
Crankcase 8.08gal (US)
Diesel Exhaust Fluid 8.057gal (US)
Fuel Tank 216.09gal (US)
Hydraulic System 21.926gal (US)
Transmission System 24.76gal (US)
Operating Weight - Empty 79787lb
Overall Length 45.9ft
Operating Weight - Empty 80630lb
Overall Length - With Bail Down 51.1ft
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
Brakes ISO 3450:1996
Falling Object Protective Structure (FOPS) ISO 3449:2005 Level II
Reverse Alarm ISO 9533:2010
Rollover Protection Structure (ROPS) ISO 3471:2008 for up to 17 084 kg (37,664 lb)
Seat Belt SAE J386:JUN1985
Steering System ISO 5010:2007
Transmission Gear - Eighth 33.5mile/h
Transmission Gear - Fifth 13.6mile/h
Transmission Gear - First 3.1mile/h
Transmission Gear - Fourth 10.1mile/h
Transmission Gear - Reverse 5.7mile/h
Transmission Gear - Second 5.5mile/h
Transmission Gear - Seventh 24.8mile/h
Transmission Gear - Sixth 18.4mile/h
Transmission Gear - Third 7.5mile/h
Apron Lower 3.8s
Apron Raise 2.95s
Bail Lower 3.2s
Bail Raise 1.8s
Bowl Lower 3.5s
Bowl Raise 3s
Ejector Extend 5.2s
Ejector Retract 6.7s
Standard and optional equipment may vary. Consult your Cat dealer for details.
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
Braking system: - Primary and secondary, wet disc, hydraulic
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
Alarm, backup
Lighting system: - Brake lights, LED - Turn signals with hazard function, LED
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
Extended Life Coolant to -37° C (-34° F)
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
Bowl: - 18.4 m3 (24 yd3), heaped - 14.1 m3 (18.4 yd3), struck
Vandalism locks
Hydraulic position sensing cylinders (bowl lift and apron)
Standard and optional equipment may vary. Consult your Cat dealer for details.
Secondary Steering Arrangement
Sequence Assist Arrangement
Load Assist
Cat Grade Control with Load Assist
HID work lights
Cooling, high ambient HRC
Cooling, low ambient HRC
Cooling, high ambient LRC
Cooling, low ambient LRC
Camera arrangement - WAVS
Steering lock - external
Cab beacon
Air horn
Air horn and beacon
Fender, scraper
Guard, overflow
Wiring group
Year of manufacture plate
Film arrangement - U.S. (ANSI)
Film arrangement - International (ISO)
