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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 18.4 m³

Top Speed - Loaded 53.9 km/h

Width - Overall Machine 3585 mm
Width - Tractor 3381 mm
Width - Inside of Bowl 3048 mm
Height - Overall Shipping 4029 mm
Height - Top of Cab 3612 mm
Ground Clearance - Tractor 557 mm
Front of Tractor to Front Axle 3119 mm
Axle to Vertical Hitch Pin 540 mm
Height - Scraper Blade Maximum 520 mm
Wheel Base 7998 mm
Rear Axle - Rear of Machine 2898 mm
Length - Maximum (Push-Pull) 15576 mm
Length - Overall Machine - Standard 14015 mm
Width - Outside Rear Tires 3275 mm
Width - Overall Machine - Ladder Down 3790 mm
Width - Rear Tire Centers 2290 mm

Fuel Tank 818 l
Cooling System 45 l
Crankcase 30.58 l
Diesel Exhaust Fluid 30.5 l
Hydraulic System 83 l
Transmission System 93 l

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

Engine Model - Tractor Cat C13
Flywheel Power - Tractor 304 kW
Note Cat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Rated Engine RPM - Tractor 2000 r/min

180° Curb-to-Curb Turning Width 11.8 m
Fuel Tank Refill Capacity - Scraper 818 l
Maximum Depth of Cut 315 mm
Maximum Depth of Spread 540 mm
Overall Shipping Height 4.03 m
Overall Width 3.58 m
Rated Load 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Scraper Capacity - Heaped 18.4 m³
Scraper Capacity - Struck 13 m³
Tires - Scraper 33.25R29**E3
Tires - Tractor Drive 33.25R29**E3
Top Speed - Loaded 53.9 km/h
Width - Cut 3.14 m

Apron Lower 3.8 s
Apron Raise 2.95 s
Bail Lower 3.2 s
Bail Raise 1.8 s
Bowl Lower 3.5 s
Bowl Raise 3 s
Ejector Extend 5.2 s
Ejector Retract 6.7 s

Operating Weight - Empty 36185 kg
Overall Length 14.02 m

Operating Weight - Empty 36567 kg
Overall Length - With Bail Down 15.58 m

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 53.9 km/h
Transmission Gear - Fifth 21.9 km/h
Transmission Gear - First 5 km/h
Transmission Gear - Fourth 16.3 km/h
Transmission Gear - Reverse 9.2 km/h
Transmission Gear - Second 8.9 km/h
Transmission Gear - Seventh 39.9 km/h
Transmission Gear - Sixth 29.6 km/h
Transmission Gear - Third 12.1 km/h

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