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.
Flywheel Power - Tractor/Scraper
304 kW (407 hp)
Scraper Capacity - Heaped
24yd³
Top Speed - Loaded
33.5mile/h
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
Width - Overall Machine - Ladder Down
149.2in
Length - Overall Machine - Standard
551.8in
Length - Maximum (Push-Pull)
613.2in
Width - Rear Tire Centers
90.2in
Maximum Depth of Cut
12.4in
Fuel Tank Refill Capacity - Scraper
216.1gal (US)
180° Curb-to-Curb Turning Width
38.71ft
Scraper Capacity - Heaped
24yd³
Overall Width
11.75ft
Maximum Depth of Spread
21.3in
Overall Shipping Height
13.22ft
Tires - Tractor Drive
33.25R29**E3
Width - Cut
10.3ft
Scraper Capacity - Struck
17.1yd³
Top Speed - Loaded
33.5mile/h
Tires - Scraper
33.25R29**E3
Rated Load
26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Note
Cat® C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Flywheel Power - Tractor
407hp
Rated Engine RPM - Tractor
2000r/min
Engine Model - Tractor
Cat® C13
Fuel Tank
216.09gal (US)
Crankcase
8.08gal (US)
Hydraulic System
21.926gal (US)
Diesel Exhaust Fluid
8.057gal (US)
Cooling System
11.89gal (US)
Transmission System
24.76gal (US)
Overall Length
45.9ft
Operating Weight - Empty
79787lb
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
Reverse Alarm
ISO 9533:2010
Brakes
ISO 3450:1996
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
Steering System
ISO 5010:2007
Seat Belt
SAE J386:JUN1985
Transmission Gear - Eighth
33.5mile/h
Transmission Gear - Third
7.5mile/h
Transmission Gear - Fourth
10.1mile/h
Transmission Gear - First
3.1mile/h
Transmission Gear - Fifth
13.6mile/h
Transmission Gear - Reverse
5.7mile/h
Transmission Gear - Seventh
24.8mile/h
Transmission Gear - Sixth
18.4mile/h
Transmission Gear - Second
5.5mile/h
Ejector Retract
6.7s
Bail Raise
1.8s
Apron Raise
2.95s
Apron Lower
3.8s
Ejector Extend
5.2s
Bowl Raise
3s
Bowl Lower
3.5s
Bail Lower
3.2s
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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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- Steering Arrangements
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- Secondary Steering Arrangement
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- Integrated Technologies
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- Cat Grade Control, Cat Payload, Sequence Assit, and Load Assist
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- Other Attachments
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- Steering lock - external
- Cab beacon with air horn
- Air horn
- Air horn and beacon
- Wiring group
- Year of manufacture plate
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- Other Standard Equipment – Scraper
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- Bowl overflow guard
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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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- Service Instructions
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- Film arrangement - U.S. (ANSI)
- Film arrangement - International (ISO)
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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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- Integrated Technologies
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- Sequence Assist and Cat Payload Arrangement
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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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- Camera arrangement - WAVS
- 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
- Interactive touchscreen vehicle information 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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- Fender, 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)
