Category : Scrapers ➔ Manufacturer : Caterpillar ➔ Model : 621F ➔
The Caterpillar 621F is a wheel tractor-scraper used for earthmoving, haul, and site preparation applications. As part of Caterpillar's scraper lineup, the 621F is designed to load, transport, and spread material efficiently across construction, mining, and large-scale grading projects. It typically features a single-engine, open bowl design with a rear push-pull arrangement or push-loading capability depending on configuration. The 621F is known for high-capacity material handling, traction, and productivity in medium to large earthmoving operations. It is commonly used for cut-and-fill work, road building, land development, and mass excavation where fast cycle times are required.
Bowl
Caterpillar 621F Scraper Bowl specifications
Heaped Capacity
20.1 cu yd
Max Depth Of Cut
13.20 in (33.53 cm)
Rated Payload
47,994.70 lbs (21,770.06 kg)
Struck Capacity
14 cu yd
Width Of Cut
10.00 ft (3.05 m)
Dimensions
Caterpillar 621F Scraper Dimensions specifications
Axle To Vertical Hitch Pin
17.00 in (43.18 cm)
Front Of Tractor To Front Axle
125.00 in (317.50 cm)
Ground Clearance - Tractor
22.00 in (55.88 cm)
Height
12.17 ft (3.71 m)
Height - Overall Shipping
132.00 in (335.28 cm)
Height - Scraper Blade Maximum
21.00 in (53.34 cm)
Height - Top Of Cab
11.09 ft (3.38 m)
Length
42.33 ft (12.90 m)
Length - Overall Machine
507.00 in (1,287.78 cm)
Overall Height
12.18 ft (3.71 m)
Overall Length
42.43 ft (12.93 m)
Overall Width
11.39 ft (3.47 m)
Rear Axle - Rear Of Machine
85.00 in (215.90 cm)
Weight
70,746.00 lbs (32,089.89 kg)
Wheel Base
25.34 ft (7.72 m)
Wheelbase
25.33 ft (7.72 m)
Width
11.33 ft (3.45 m)
Width - Inside Of Bowl
116.00 in (294.64 cm)
Width - Outside Rear Tires
120.00 in (304.80 cm)
Width - Overall Machine
136.00 in (345.44 cm)
Width - Rear Tire Center Lines
87.00 in (220.98 cm)
Width - Tractor
117.00 in (297.18 cm)
Engine
Caterpillar 621F Scraper Engine specifications
Tractor Engine
3406C
Hydraulics
Caterpillar 621F Scraper Hydraulics specifications
Apron Cylinder Bore
7.30 in (18.54 cm)
Apron Cylinder Stroke
24.00 in (60.96 cm)
Bowl Cylinder Bore
6.00 in (15.24 cm)
Bowl Cylinder Stroke
32.00 in (81.28 cm)
Cushion Hitch Circuit
9.70 gpm (36.71 lpm)
Ejector Cylinder Bore
6.50 in (16.51 cm)
Ejector Cylinder Stroke
61.00 in (154.94 cm)
Relief Valve - Implement Circuit
2150 psi
Relief Valve - Steering Circuit
2250 psi
Scraper Circuit
65.50 gpm (247.92 lpm)
Secondary Steering Circuit
37.00 gpm (140.05 lpm)
Steering Circuit
52.00 gpm (196.82 lpm)
Operational
Caterpillar 621F Scraper Operational specifications
Fuel Capacity
215.10 gal (814.15 l)
Scraper Bowl
Caterpillar 621F Scraper Scraper Bowl specifications
Apron Closure Force
24,075.00 lbs (10,920.25 kg)
Apron Opening
70.10 in (178.05 cm)
Capacity - Struck
14 cu yd
Cutting Edge Thickness
1.20 in (3.05 cm)
Depth Of Cut - Maximum
13.20 in (33.53 cm)
Depth Of Spread - Maximum
70.10 in (178.05 cm)
Ground Clearance - Maximum
20.50 in (52.07 cm)
Hyd. Penetration Force - 621g
33,840.00 lbs (15,349.58 kg)
Rated Load
48,000.00 lbs (21,772.46 kg)
Scraper Capacity - Heaped
30 cu yd
Width - Cut - To Router Bits
119.00 in (302.26 cm)
Service Refill Capacities - Tractor
Caterpillar 621F Scraper Service Refill Capacities - Tractor specifications
Cooling System
22.00 gal (83.27 l)
Crankcase
9.50 gal (35.96 l)
Differential
43.00 gal (162.76 l)
Final Drive - Each
5.00 gal (18.93 l)
Hydraulic Reservoir
37.00 gal (140.05 l)
Transmission
19.00 gal (71.92 l)
Wheel Coolant - Each
12.00 gal (45.42 l)
Steering
Caterpillar 621F Scraper Steering specifications
Ground-Driven Secondary Steering System
39.90 gpm (151.02 lpm)
Hydraulic Output
52.00 gpm (196.82 lpm)
Steering Angle - Left
85 degrees
Steering Angle - Right
90 degrees
Width - 180 Degrees Turn
35.80 ft (10.91 m)
Tractor Engine
Caterpillar 621F Scraper Tractor Engine specifications
Bore
5.40 in (13.72 cm)
Caterpillar Net Power
333.00 hp (248.32 kw)
Displacement
893.00 cu in (14,633.68 cu cm)
Eec 80/1269
330.00 hp (246.09 kw)
Gross Power
330.00 hp (246.09 kw)
Gross Power - Gears 1-2
347.00 hp (258.76 kw)
Iso 9249
330.00 hp (246.09 kw)
Net Power - Gears 1-2
330.00 hp (246.09 kw)
Sae J1349
327.00 hp (243.85 kw)
Stroke
6.50 in (16.51 cm)
Transmission
Caterpillar 621F Scraper Transmission specifications
1 Forward
3.10 mph (4.99 kph)
2 Forward
5.60 mph (9.01 kph)
3 Forward
7.10 mph (11.43 kph)
4 Forward
9.60 mph (15.45 kph)
5 Forward
12.90 mph (20.76 kph)
6 Forward
17.50 mph (28.16 kph)
7 Forward
23.60 mph (37.98 kph)
8 Forward
31.90 mph (51.34 kph)
Max Speed Forward
31.70 mph (51.02 kph)
Reverse
5.7 mile/h
Weights
Caterpillar 621F Scraper Weights specifications
Operating Weight
70,715.00 lbs (32,075.82 kg)
Total Operating - Empty
70,746.40 lbs (32,090.07 kg)
Weights - Standard, Tandem
Caterpillar 621F Scraper Weights - Standard, Tandem specifications
Front Axle
48,109.00 lbs (21,821.90 kg)
Front Axle Weight - Loaded
62,915.00 lbs (28,537.80 kg)
Rear Axle
22,638.00 lbs (10,268.44 kg)
Rear Axle - Weight - Loaded
55,792.00 lbs (25,306.86 kg)
Scraper Shipping
21,715.00 lbs (9,849.77 kg)
Total Operating - Empty
70,715.00 lbs (32,075.82 kg)
Total Operating - Loaded
118,707.00 lbs (53,844.66 kg)
Total Shipping
69,658.00 lbs (31,596.38 kg)
Tractor Shipping
47,943.00 lbs (21,746.61 kg)
