New CAT Equipment

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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General

Overall Shipping Height	13.22 ft
Overall Width	11.75 ft
Scraper Capacity - Heaped	24 yd³
Fuel Tank Refill Capacity - Scraper	216.1 gal (US)
Tires - Scraper	33.25R29**E3
Width - Cut	10.3 ft
Maximum Depth of Spread	21.3 in
Top Speed - Loaded	33.5 mile/h
Rated Load	26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
180° Curb-to-Curb Turning Width	38.71 ft
Scraper Capacity - Struck	17.1 yd³
Maximum Depth of Cut	12.4 in
Tires - Tractor Drive	33.25R29**E3

Engine

Engine Model - Tractor	Cat C13
Flywheel Power - Tractor	407 HP
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

Tractor Engine

Flywheel Power - Tractor/Scraper

304 kW (407 hp)

Scraper Bowl

Scraper Capacity - Heaped

24 yd³

Transmission

Top Speed - Loaded

33.5 mile/h

Service Refill Capacities

Hydraulic System	21.926 gal (US)
Crankcase	8.08 gal (US)
Transmission System	24.76 gal (US)
Cooling System	11.89 gal (US)
Fuel Tank	216.09 gal (US)
Diesel Exhaust Fluid	8.057 gal (US)

Dimensions

Width - Overall Machine	141.1 in
Width - Tractor	133.1 in
Width - Inside of Bowl	120 in
Width - Outside Rear Tires	128.9 in
Height - Overall Shipping	158.6 in
Height - Top of Cab	142.2 in
Ground Clearance - Tractor	21.9 in
Front of Tractor to Front Axle	122.8 in
Axle to Vertical Hitch Pin	21.3 in
Height - Scraper Blade Maximum	20.5 in
Wheel Base	314.9 in
Rear Axle - Rear of Machine	114.1 in
Length - Overall Machine - Standard	551.8 in
Length - Maximum (Push-Pull)	613.2 in
Width - Overall Machine - Ladder Down	149.2 in
Width - Rear Tire Centers	90.2 in

Non Push-Pull

Operating Weight - Empty	79787 lb
Overall Length	45.9 ft

Push-Pull

Overall Length - With Bail Down	51.1 ft
Operating Weight - Empty	80630 lb

Cab

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

Safety Criteria Compliance Standards

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

Travel Speeds - Runout

Transmission Gear - Seventh	24.8 mile/h
Transmission Gear - Fifth	13.6 mile/h
Transmission Gear - First	3.1 mile/h
Transmission Gear - Sixth	18.4 mile/h
Transmission Gear - Second	5.5 mile/h
Transmission Gear - Third	7.5 mile/h
Transmission Gear - Fourth	10.1 mile/h
Transmission Gear - Eighth	33.5 mile/h
Transmission Gear - Reverse	5.7 mile/h

Implement Cycle Times

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

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