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Open Bowl Scrapers
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.
Overall Shipping Height
13.2 ft/4.03 m
Fuel Tank Refill Capacity - Scraper
201.0 gal (US)/763.0 l
Maximum Depth of Spread
21.3 in/540.0 mm
Width - Cut
10.4 ft/3.14 m
Key Features
Be More Productive
WORK IN COMFORT
DESIGNED FOR SAFETY
EASY TO OPERATE
INTERGRATED CAT TECHNOLOGIES
EXECUTE EFFICIENCY
Specifications
Metric
|
Imperial
General
Overall Shipping Height
13.2 ft
4.03 m
Fuel Tank Refill Capacity - Scraper
201.0 gal (US)
763.0 l
Maximum Depth of Spread
21.3 in
540.0 mm
Width - Cut
10.4 ft
3.14 m
Overall Width
11.8 ft
3.57 m
Tires - Scraper
33.25R29**E3
180° Curb-to-Curb Turning Width
38.71 ft
11.8 m
Rated Load
26 127 kg (57,600 lb); 26.19 tonnes (28.81 tons)
Scraper Capacity - Struck
17.1 yd³
13.0 m³
Maximum Depth of Cut
12.4 in
315.0 mm
Scraper Capacity - Heaped
24.0 yd³
18.4 m³
Tires - Tractor Drive
33.25R29**E3
Top Speed - Loaded
33.5 mile/h
53.9 km/h
Engine
Rated Engine RPM - Tractor
2000.0 r/min
2000.0 r/min
Note
Meets U.S. EPA Tier 4 Final/EU Stage V emission standards, or noncertified and equivalent to U.S. EPA Tier 2, or noncertified and equivalent to U.S. EPA Tier 3/EU Stage IIIA.
Flywheel Power - Tractor
407.0 hp
304.0 kW
Engine Model - Tractor
Cat C13
Tractor Engine
Flywheel Power - Tractor/Scraper
304 kW (407 hp)
Scraper Bowl
Scraper Capacity - Heaped
24.0 yd³
18.4 m³
Transmission
1 Forward
3.1 mile/h
5.0 km/h
2 Forward
5.5 mile/h
8.9 km/h
3 Forward
7.5 kl/h
12.1 kl/h
4 Forward
10.1 mile/h
16.3 km/h
5 Forward
13.6 mile/h
21.9 km/h
6 Forward
18.4 mile/h
29.9 km/h
7 Forward
24.8 mile/h
39.9 km/h
8 Forward
33.5 mile/h
53.9 kl/h
Reverse
5.7 mile/h
9.2 km/h
Top Speed - Loaded
33.5 mile/h
53.9 km/h
Service Refill Capacities
Transmission System
25.5 gal (US)
97.0 l
Diesel Exhaust Fluid (DEF)
8.1 gal (US)
30.5 l
Fuel Tank
216.01 gal (US)
818.0 l
Hydraulic System
21.9 gal (US)
83.0 l
Dimensions
Width - Overall Machine
141.1 in
3585.0 mm
Width - Tractor
133.1 in
3381.0 mm
Width - Inside of Bowl
120.0 in
3048.0 mm
Width - Outside Rear Tires
128.9 in
3275.0 mm
Height - Overall Shipping
158.6 in
4029.0 mm
Height - Top of Cab
142.2 in
3612.0 mm
Ground Clearance - Tractor
21.9 in
557.0 mm
Front of Tractor to Front Axle
122.8 in
3119.0 mm
Axle to Vertical Hitch Pin
21.3 in
540.0 mm
Height - Scraper Blade Maximum
20.5 in
520.0 mm
Wheel Base
314.9 in
7998.0 mm
Rear Axle - Rear of Machine
114.1 in
2898.0 mm
Length - Overall Machine - Standard
551.8 in
14015.0 mm
Width - Overall Machine - Ladder Down
149.2 in
3790.0 mm
Length - Maximum (Push-Pull)
613.2 in
15576.0 mm
Width - Rear Tire Centers
90.2 in
2290.0 mm
Non Push-Pull
Operating Weight - Empty
79774.0 lb
36185.0 kg
Overall Length
45.10 ft
14.02 m
Push-Pull
Operating Weight - Empty
79774.0 lb
36185.0 kg
Overall Length - With Bail Down
51.1 ft
15.58 m
Cab
Exterior Sound Level
The exterior sound power level for the standard machine (ISO 6395:2008) is 114 dB(A).
ROPS/FOPS
Meets ISO standards
Safety Criteria Compliance Standards
Seat Belt
SAE J386:JUN1985
Rollover Protection Structure (ROPS)
ISO 3471:2008 for up to 17 084 kg (37,664 lb)
Steering System
ISO 5010:2007
Brakes
ISO 3450:2011
Falling Object Protective Structure (FOPS)
ISO 3449:2005 Level II
Reverse Alarm
ISO 9533:2010
Travel Speeds - Runout
Transmission Gear - Eighth
33.5 mile/h
53.9 km/h
Transmission Gear - Seventh
24.8 mile/h
39.9 km/h
Transmission Gear - Second
5.5 mile/h
8.9 km/h
Transmission Gear - Third
7.5 mile/h
12.1 km/h
Transmission Gear - Fifth
13.6 mile/h
21.9 km/h
Transmission Gear - Sixth
18.4 mile/h
29.6 km/h
Transmission Gear - Reverse
5.7 mile/h
9.2 km/h
Transmission Gear - Fourth
10.1 mile/h
16.3 km/h
Transmission Gear - First
3.1 mile/h
5.0 km/h
Implement Cycle Times
Ejector Retract
6.7 s
6.7 s
Bail Lower
3.2 s
3.2 s
Ejector Extend
5.2 s
5.2 s
Apron Raise
2.95 s
2.95 s
Bowl Raise
3.0 s
3.0 s
Bail Raise
1.8 s
1.8 s
Bowl Lower
3.5 s
3.5 s
Apron Lower
3.8 s
3.8 s
Equipment
Standard Equipment
Optional Equipment