Overview
The Caterpillar 621B Motor Scraper is a motor scraper listed in the Heavy Equipment Hub equipment database with structured specifications for comparison, research, and machine selection. Key specification points include engine power of 330 hp, capacity of 20.1 yd³, travel speed of 29.9 mph and fuel capacity of 135.0 gal. This model can be reviewed for high-volume earthmoving, haul road production, cut-and-fill work, and scraper fleet comparison. Use the full specifications table to compare the Caterpillar 621B Motor Scraper against similar motor scraper models by power, weight, capacity, dimensions, speed, and other technical values.
Key Specifications
Net Power
330
hp
Rated Payload
47,994.70
lb
Overall Length
41.67
in
Overall Width
11.32
ft
Full Specifications
22 specs
Dimensions
Front Axel - Loaded
63,021 lb / 28,586 kg
Model
3406
Net Power
330 hp / 246.1 kW
Overall Height
11.91 ft / 3.63 m
Overall Length
41.67 in / 1,058 mm
Overall Width
11.32 ft / 3.45 m
Rated Payload
47,995 lb / 21,770 kg
Total Operating - Empty
66,591 lb / 30,205 kg
Total Operating - Loaded
114,585 lb / 51,975 kg
Wheelbase
25.33 ft / 7.72 m
Width Of Cut
10 ft / 3.05 m
Engine
Displacement
891 cu in / 14.6 L
Front Axle - Empty
46,612 lb / 21,143 kg
Fuel Capacity
135 gal / 511.0 L
Heaped Capacity
20.10 yd³ / 15.37 m³
Max Depth Of Cut
13.40 ft / 4.08 m
Max Speed Forward
29.90 mph / 48.1 km/h
Number of Forward Gears
8
Power Measured @
1,900 rpm
Rear Axle - Empty
19,977 lb / 9,062 kg
Rear Axle - Loaded
51,564 lb / 23,389 kg
Struck Capacity
14 yd³ / 10.70 m³
Related Machines
Related Guides & Articles
Frequently Asked Questions
How powerful is the Caterpillar 621B Motor Scraper engine? +
The Caterpillar 621B Motor Scraper produces 330 hp (246.1 kW) of engine power. This output is typical for its weight class and designed to handle demanding Motor Scraper work cycles efficiently.
How does the Caterpillar 621B Motor Scraper compare to similar Motor Scraper models? +
You can compare the Caterpillar 621B Motor Scraper side by side with any other model using the Heavy Equipment Hub compare tool. Key comparison points include engine power, operating weight, digging depth, hydraulic flow, and overall dimensions.