- Category: Scrapers ➔
- Manufacturer: Caterpillar ➔
- Model: 621F ➔
The Caterpillar 621F is a wheel tractor-scraper used in earthmoving, site preparation, and large-scale grading applications. As part of Caterpillar's scraper lineup, the 621F is designed for efficient loading, hauling, spreading, and leveling of material across construction and mining sites. It typically features a single-engine tractor and open bowl scraper configuration, with articulated steering and high-capacity material handling. The 621F is used for moving soil, gravel, and other loose materials over moderate distances. It is commonly selected for highway construction, land development, and mass excavation projects where productivity, traction, and cycle efficiency are important.
Bowl
| Heaped Capacity | 20.10 cu yd (15.37 cu m)
|
| Max Depth of Cut | 13.20 in (33.53 cm)
|
| Rated Payload | 47,994.70 lbs (21,770.06 kg)
|
| Struck Capacity | 14.00 cu yd (10.70 cu m)
|
| Width of Cut | 10.00 ft (3.05 m)
|
Dimensions
| 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 - Overall Shipping | 132.00 in (335.28 cm)
|
| Height - Scraper Blade Maximum | 21.00 in (53.34 cm)
|
| Height - Top of Cab | 11.10 ft (3.38 m)
|
| Length - Overall Machine | 507.00 in (1,287.78 cm)
|
| Overall Height | 12.20 ft (3.72 m)
|
| Overall Length | 42.50 ft (12.95 m)
|
| Overall Width | 11.40 ft (3.47 m)
|
| Rear Axle - Rear of Machine | 85.00 in (215.90 cm)
|
| Wheel Base | 25.40 ft (7.74 m)
|
| Wheelbase | 25.40 ft (7.74 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
Hydraulic System
| 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)
|
Operating Specifications
| Fuel Capacity | 215.10 gal (814.15 l)
|
Scraper Bowl
| Apron Closure Force | 24,075.00 lbs (10,920.25 kg)
|
| Apron Opening | 70.10 in (178.05 cm)
|
| Capacity - Struck | 14.00 cu yd (10.70 cu m)
|
| 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 | 30.00 cu yd (22.94 cu m)
|
| Width - Cut - To Router Bits | 119.00 in (302.26 cm)
|
Service Refill Capacities - Tractor
| 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 System
| 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
| 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)
|
| 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
| 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 | 5.70 mph (9.17 kph)
|
Weights
| Operating Weight | 70,715.00 lbs (32,075.82 kg)
|
| Total Operating - empty | 70,746.40 lbs (32,090.07 kg)
|
Weights - Standard, Tandem
| 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)
|
