Overview
The Caterpillar 621G 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 365 hp, operating weight of 124,590 lb, capacity of 22.0 yd³, travel speed of 32.0 mph, fuel capacity of 160.0 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 621G Motor Scraper against similar motor scraper models by power, weight, capacity, dimensions, speed, and other technical values.
Key Specifications
Operating Weight
124,590
lb
Net Power
365
hp
Gross Power
393
hp
Rated Payload
52,800
lb
Full Specifications
115 specs
Dimensions
Axle To Vertical Hitch Pin
17 in / 432 mm
Capacity - Struck
15.70 yd³ / 12.00 m³
Differential Fluid Capacity
38 gal / 143.8 L
Front Axel - Loaded
67,093 lb / 30,433 kg
Front Of Tractor To Front Axle
120.40 in / 3,058 mm
Gross Power
393 hp / 293.1 kW
Ground Clearance - Tractor
21.80 ft / 6.64 m
Height - Overall Shipping
145.90 in / 3,706 mm
Height - Scraper Blade Maximum
20.60 ft / 6.28 m
Height - Top Of Cab
11.24 ft / 3.43 m
Height to Top of Cab
11.25 ft / 3.43 m
Length - Overall Machine
508.50 in / 12,916 mm
Model
C15 ACERT
Net Power
365 hp / 272.2 kW
Overall Height
12.17 ft / 3.71 m
Overall Length
42.42 in / 1,077 mm
Overall Width
11.42 ft / 3.48 m
Rated Payload
52,800 lb / 23,950 kg
Rear Axle - Rear Of Machine
84.30 in / 2,141 mm
Rim Radius
17 ft / 5.18 m
Total Operating - Empty
73,789 lb / 33,470 kg
Total Operating - Loaded
126,590 lb / 57,420 kg
Tractor Ground Clearance
1.83 ft / 0.56 m
Wheel Base
25.34 in / 644 mm
Wheelbase
25.42 ft / 7.75 m
Width - Inside Of Bowl
116 in / 2,946 mm
Width - Outside Rear Tires
120 in / 3,048 mm
Width - Overall Machine
136.50 in / 3,467 mm
Width - Rear Tire Center Lines
86.60 in / 2,200 mm
Width - Tractor
123.20 in / 3,129 mm
Width Of Cut
9.20 ft / 2.80 m
Engine
1 Forward
3.20 mph / 5.1 km/h
2 Forward
5.80 mph / 9.3 km/h
3 Forward
7.50 mph / 12.1 km/h
4 Forward
10.10 mph / 16.3 km/h
5 Forward
13.60 mph / 21.9 km/h
6 Forward
18.20 mph / 29.3 km/h
7 Forward
24.20 mph / 38.9 km/h
8 Forward
32 mph / 51.5 km/h
Alternator Supplied Amperage
75 A
Apron Closure Force
24,075 lb / 10,920 kg
Apron Cylinder Bore
7.30 in / 185 mm
Apron Cylinder Stroke
23.50 in / 597 mm
Apron Opening
70
Bore
5.70 in / 145 mm
Bowl Cylinder Bore
6 in / 152 mm
Bowl Cylinder Stroke
32 in / 813 mm
Capacity Heaped
22
Caterpillar Net Power
330 hp / 246.1 kW
Compensator Settings - Cushion Hitch Circuit
2,175 psi / 150.0 bar
Cooling System Fluid Capacity
28 gal / 106.0 L
Cushion Hitch Circuit
9.80 gal/min / 37.1 L/min
Depth Of Cut - Maximum
13.10 ft / 3.99 m
Depth Of Spread - Maximum
20.40 ft / 6.22 m
Differential
32
Displacement
1,098 cu in / 18.0 L
Eec 80/1269
330
Ejector Cylinder Bore
6.50 in / 165 mm
Ejector Cylinder Stroke
61 in / 1,549 mm
Engine Oil Fluid Capacity
9.50 gal / 36.0 L
Front Axle
50,176 lb / 22,759 kg
Front Axle - Empty
50,177 lb / 22,760 kg
Front Axle Weight - Loaded
67,092 lb / 30,432 kg
Fuel Capacity
160 gal / 605.7 L
Gross Power - Gears 1-2
359 hp / 267.7 kW
Gross Power - Gears 3-8
394 hp / 293.8 kW
Ground Clearance - Maximum
20.60 ft / 6.28 m
Heaped Capacity
22 yd³ / 16.82 m³
Hyd. Penetration Force
119,600 lb / 54,250 kg
Hydraulic Output
55 gal/min / 208.2 L/min
Hydraulic Reservoir
33 gal / 124.9 L
Hydraulic System Fluid Capacity
37 gal / 140.1 L
Iso 9249
330
Max Depth Of Cut
13.10 ft / 3.99 m
Max Speed Forward
32 mph / 51.5 km/h
Max Speed Reverse
5.70 mph / 9.2 km/h
Net Power
365 hp / 272.2 kW
Net Power - Gears 1-2
330 hp / 246.1 kW
Net Power - Gears 3-8
365 hp / 272.2 kW
Number of Forward Gears
8
Number of Reverse Gears
1
Operating Voltage
24 V
Operating Weight
124,590 lb / 56,513 kg
Rated Load
52,800
Rear Axle
23,612 lb / 10,710 kg
Rear Axle - Empty
23,612 lb / 10,710 kg
Rear Axle - Loaded
59,496 lb / 26,987 kg
Rear Axle - Weight - Loaded
59,497 lb / 26,987 kg
Relief Valve - Implement Circuit
2,175 psi / 150.0 bar
Relief Valve - Steering Circuit
2,250 psi / 155.1 bar
Reverse
5.70
Sae J1349
326
Scraper Circuit
72.10 gal/min / 272.9 L/min
Scraper Shipping
22,461
Secondary Steering Circuit
52 gal/min / 196.8 L/min
Steering
Width - 180 Degrees Turn
Steering Circuit
55 gal/min / 208.2 L/min
Stroke
7.20 in / 183 mm
Struck Capacity
15.70 yd³ / 12.00 m³
Total Shipping
72,455
Tractor Engine
15
Tractor Shipping
49,994
Transmission
1 Forward
Transmission Fluid Capacity
19 gal / 71.9 L
Transmission Type
8-speed automatic Powershift with Electronic Control
Wheel Coolant - Each
12
Wheel Coolant Fluid Capacity - Each
12 gal / 45.4 L
Width - 180 Degrees Turn
35.90 ft / 10.94 m
Width - Cut - To Router Bits
119 in / 3,023 mm
Windshield Washer
1.50
Hydraulics
Cutting Edge Thickness
0.90
Other
Travel Speed - Maximum
32 mph / 51.5 km/h
Cooling System
14 gal / 53.0 L
Crankcase
10 gal / 37.9 L
Final Drive - Each
5.3
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Frequently Asked Questions
What is the operating weight of the Caterpillar 621G Motor Scraper? +
The Caterpillar 621G Motor Scraper has an operating weight of 124,590 lb (56,513 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 621G Motor Scraper engine? +
The Caterpillar 621G Motor Scraper produces 393 hp (293.1 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 621G Motor Scraper compare to similar Motor Scraper models? +
You can compare the Caterpillar 621G 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.