Overview
The Caterpillar 621F 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, operating weight of 70,715 lb, capacity of 20.1 yd³, travel speed of 31.7 mph, fuel capacity of 215.1 gal and hydraulic capacity of 37.0 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 621F Motor Scraper against similar motor scraper models by power, weight, capacity, dimensions, speed, and other technical values.
Key Specifications
Operating Weight
70,715
lb
Gross Power
330
hp
Rated Payload
47,994.70
lb
Overall Length
42.43
in
Full Specifications
90 specs
Dimensions
Axle To Vertical Hitch Pin
17 in / 432 mm
Capacity - Struck
14 yd³ / 10.70 m³
Front Of Tractor To Front Axle
125 in / 3,175 mm
Gross Power
330 hp / 246.1 kW
Ground Clearance - Tractor
22 ft / 6.71 m
Height - Overall Shipping
132 in / 3,353 mm
Height - Scraper Blade Maximum
21 ft / 6.40 m
Height - Top Of Cab
11.09 ft / 3.38 m
Length - Overall Machine
507 in / 12,878 mm
Model
3406CTA
Overall Height
12.18 ft / 3.71 m
Overall Length
42.43 in / 1,078 mm
Overall Width
11.39 ft / 3.47 m
Rated Payload
47,995 lb / 21,770 kg
Rear Axle - Rear Of Machine
85 in / 2,159 mm
Total Operating - Empty
70,746 lb / 32,090 kg
Total Operating - Loaded
118,707 lb / 53,845 kg
Wheel Base
25.34 in / 644 mm
Wheelbase
25.33 ft / 7.72 m
Width - Inside Of Bowl
116 in / 2,946 mm
Width - Outside Rear Tires
120 in / 3,048 mm
Width - Overall Machine
136 in / 3,454 mm
Width - Rear Tire Center Lines
87 in / 2,210 mm
Width - Tractor
117 in / 2,972 mm
Width Of Cut
10 ft / 3.05 m
Engine
1 Forward
3.10 mph / 5.0 km/h
2 Forward
5.60 mph / 9.0 km/h
3 Forward
7.10 mph / 11.4 km/h
4 Forward
9.60 mph / 15.4 km/h
5 Forward
12.90 mph / 20.8 km/h
6 Forward
17.50 mph / 28.2 km/h
7 Forward
23.60 mph / 38.0 km/h
8 Forward
31.90 mph / 51.3 km/h
Apron Closure Force
24,075 lb / 10,920 kg
Apron Cylinder Bore
7.30 in / 185 mm
Apron Cylinder Stroke
24 in / 610 mm
Apron Opening
70.10
Bore
5.40 in / 137 mm
Bowl Cylinder Bore
6 in / 152 mm
Bowl Cylinder Stroke
32 in / 813 mm
Caterpillar Net Power
333 hp / 248.3 kW
Cushion Hitch Circuit
9.70 gal/min / 36.7 L/min
Depth Of Cut - Maximum
13.20 ft / 4.02 m
Depth Of Spread - Maximum
70.10 ft / 21.37 m
Differential
43
Displacement
893 cu in / 14.6 L
Eec 80/1269
330
Ejector Cylinder Bore
6.50 in / 165 mm
Ejector Cylinder Stroke
61 in / 1,549 mm
Front Axle
48,109 lb / 21,822 kg
Front Axle Weight - Loaded
62,915 lb / 28,538 kg
Fuel Capacity
215.10 gal / 814.2 L
Gross Power - Gears 1-2
347 hp / 258.8 kW
Ground Clearance - Maximum
20.50 ft / 6.25 m
Ground-Driven Secondary Steering System
39.90 gal/min / 151.0 L/min
Heaped Capacity
20.10 yd³ / 15.37 m³
Hyd. Penetration Force - 621g
33,840 lb / 15,350 kg
Hydraulic Output
52 gal/min / 196.8 L/min
Hydraulic Reservoir
37 gal / 140.1 L
Iso 9249
330
Max Depth Of Cut
13.20 ft / 4.02 m
Max Speed Forward
31.70 mph / 51.0 km/h
Net Power - Gears 1-2
330 hp / 246.1 kW
Operating Weight
70,715 lb / 32,076 kg
Rated Load
48,000
Rear Axle
22,638 lb / 10,268 kg
Rear Axle - Weight - Loaded
55,792 lb / 25,307 kg
Relief Valve - Implement Circuit
2,150 psi / 148.2 bar
Relief Valve - Steering Circuit
2,250 psi / 155.1 bar
Reverse
5.70
Sae J1349
327
Scraper Capacity - Heaped
30
Scraper Circuit
65.50 gal/min / 247.9 L/min
Scraper Shipping
21,715
Secondary Steering Circuit
37 gal/min / 140.1 L/min
Steering
Width - 180 Degrees Turn
Steering Circuit
52 gal/min / 196.8 L/min
Stroke
6.50 in / 165 mm
Struck Capacity
14 yd³ / 10.70 m³
Total Shipping
69,658
Tractor Engine
3,406
Tractor Shipping
47,943
Transmission
1 Forward
Wheel Coolant - Each
12
Width - 180 Degrees Turn
35.80 ft / 10.91 m
Width - Cut - To Router Bits
119 in / 3,023 mm
Hydraulics
Cutting Edge Thickness
1.20
Other
Cooling System
22 gal / 83.3 L
Crankcase
9.50 gal / 36.0 L
Final Drive - Each
5
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Frequently Asked Questions
What is the operating weight of the Caterpillar 621F Motor Scraper? +
The Caterpillar 621F Motor Scraper has an operating weight of 70,715 lb (32,076 kg). This places it in a class suited for motor scraper applications where ground pressure and transport weight are key considerations.
How powerful is the Caterpillar 621F Motor Scraper engine? +
The Caterpillar 621F 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 621F Motor Scraper compare to similar Motor Scraper models? +
You can compare the Caterpillar 621F 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.