- Category: Scrapers ➔
- Manufacturer: Caterpillar ➔
- Model: 621G ➔
The Caterpillar 621G is a wheel tractor-scraper used for earthmoving, site preparation, and large-scale material hauling. As part of Caterpillar's scraper lineup, the 621G is designed for loading, transporting, and spreading soil, gravel, and other loose materials across construction, mining, and roadbuilding applications. It typically features a high-capacity bowl, articulated steering, and a tractor-scraper configuration for efficient cut, haul, and dump cycles. The 621G is commonly selected for production earthmoving where cycle efficiency, traction, and material control are important. It is one of Caterpillar's heavy-duty scrapers used in bulk excavation and mass grading operations.
Bowl
| Heaped Capacity | 22.00 cu yd (16.82 cu m)
|
| Max Depth of Cut | 13.10 in (33.27 cm)
|
| Rated Payload | 52,800.00 lbs (23,949.71 kg)
|
| Struck Capacity | 15.70 cu yd (12.00 cu m)
|
| Width of Cut | 9.20 ft (2.80 m)
|
Dimensions
| Axle to Vertical Hitch Pin | 17.00 in (43.18 cm)
|
| Front of Tractor to Front Axle | 120.40 in (305.82 cm)
|
| Ground Clearance - Tractor | 21.80 in (55.37 cm)
|
| Height - Overall Shipping | 145.90 in (370.59 cm)
|
| Height - Scraper Blade Maximum | 20.60 in (52.32 cm)
|
| Height - Top of Cab | 11.30 ft (3.44 m)
|
| Length - Overall Machine | 508.50 in (1,291.59 cm)
|
| Overall Height | 12.20 ft (3.72 m)
|
| Overall Length | 42.50 ft (12.95 m)
|
| Overall Width | 11.50 ft (3.51 m)
|
| Rear Axle - Rear of Machine | 84.30 in (214.12 cm)
|
| Rim Radius | 17.00 in (43.18 cm)
|
| Tractor Ground Clearance | 1.90 ft (0.58 m)
|
| Wheel Base | 25.40 ft (7.74 m)
|
| Wheelbase | 25.50 ft (7.77 m)
|
| Width - Inside of Bowl | 116.00 in (294.64 cm)
|
| Width - Outside Rear Tires | 120.00 in (304.80 cm)
|
| Width - Overall Machine | 136.50 in (346.71 cm)
|
| Width - Rear Tire Center Lines | 86.60 in (219.96 cm)
|
| Width - Tractor | 123.20 in (312.93 cm)
|
Engine
| Tractor Engine | Cat C15 ACERT
|
Hydraulic System
| Apron Cylinder Bore | 7.30 in (18.54 cm)
|
| Apron Cylinder Stroke | 23.50 in (59.69 cm)
|
| Bowl Cylinder Bore | 6.00 in (15.24 cm)
|
| Bowl Cylinder Stroke | 32.00 in (81.28 cm)
|
| Compensator Settings - Cushion Hitch Circuit | 2175 psi
|
| Cushion Hitch Circuit | 9.80 gpm (37.09 lpm)
|
| Ejector Cylinder Bore | 6.50 in (16.51 cm)
|
| Ejector Cylinder Stroke | 61.00 in (154.94 cm)
|
| Relief Valve - Implement Circuit | 2175 psi
|
| Relief Valve - Steering Circuit | 2250 psi
|
| Scraper Circuit | 72.10 gpm (272.90 lpm)
|
| Secondary Steering Circuit | 52.00 gpm (196.82 lpm)
|
| Steering Circuit | 55.00 gpm (208.18 lpm)
|
Operating Specifications
| Alternator Supplied Amperage | 75 amps
|
| Cooling System Fluid Capacity | 28.00 gal (105.98 l)
|
| Differential Fluid Capacity | 38.00 gal (143.83 l)
|
| Engine Oil Fluid Capacity | 9.50 gal (35.96 l)
|
| Fuel Capacity | 160.00 gal (605.60 l)
|
| Hydraulic System Fluid Capacity | 37.00 gal (140.05 l)
|
| Operating Voltage | 24 volts
|
| Tire Size | 33.25-R29
|
| Transmission Fluid Capacity | 19.00 gal (71.92 l)
|
| Wheel Coolant Fluid Capacity - each | 12.00 gal (45.42 l)
|
Scraper Bowl
| Apron Closure Force | 24,075.00 lbs (10,920.25 kg)
|
| Apron Opening | 70.00 in (177.80 cm)
|
| Capacity - Struck | 15.70 cu yd (12.00 cu m)
|
| Capacity Heaped | 22.00 cu yd (16.82 cu m)
|
| Cutting Edge Thickness | 0.90 in (2.29 cm)
|
| Depth of Cut - Maximum | 13.10 in (33.27 cm)
|
| Depth of Spread - Maximum | 20.40 in (51.82 cm)
|
| Ground Clearance - Maximum | 20.60 in (52.32 cm)
|
| Rated Load | 52,800.00 lbs (23,949.71 kg)
|
| Width - Cut - To Router Bits | 119.00 in (302.26 cm)
|
Service Refill Capacities - Tractor
| Cooling System | 14.00 gal (52.99 l)
|
| Crankcase | 10.00 gal (37.85 l)
|
| Differential | 32.00 gal (121.12 l)
|
| Final Drive - Each | 5.30 gal (20.06 l)
|
| Hydraulic Reservoir | 33.00 gal (124.91 l)
|
| Transmission | 18.00 gal (68.13 l)
|
| Wheel Coolant - Each | 12.00 gal (45.42 l)
|
| Windshield Washer | 1.50 gal (5.68 l)
|
Steering System
| Hydraulic Output | 55.00 gpm (208.18 lpm)
|
| Steering Angle - Left | 85 degrees
|
| Steering Angle - Right | 90 degrees
|
| Width - 180 degrees Turn | 35.90 ft (10.94 m)
|
Tractor Engine
| Bore | 5.70 in (14.48 cm)
|
| Caterpillar Net Power | 330.00 hp (246.09 kw)
|
| Displacement | 1,098.00 cu in (17,993.04 cu cm)
|
| EEC 80/1269 | 330.00 hp (246.09 kw)
|
| Gross Power | 393.00 hp (293.06 kw)
|
| Gross Power - Gears 3-8 | 394.00 hp (293.81 kw)
|
| ISO 9249 | 330.00 hp (246.09 kw)
|
| Make | Caterpillar
|
| Net Power | 365.00 hp (272.18 kw)
|
| Net Power - Gears 1-2 | 330.00 hp (246.09 kw)
|
| Net Power - Gears 3-8 | 365.00 hp (272.18 kw)
|
| Net Power - Tractor/Scraper | 246 kW (330)
|
| SAE J1349 | 326.00 hp (243.10 kw)
|
| Stroke | 7.20 in (18.29 cm)
|
Transmission
| 1 Forward | 3.20 mph (5.15 kph)
|
| 2 Forward | 5.80 mph (9.33 kph)
|
| 3 Forward | 7.50 mph (12.07 kph)
|
| 4 Forward | 10.10 mph (16.25 kph)
|
| 5 Forward | 13.60 mph (21.89 kph)
|
| 6 Forward | 18.20 mph (29.29 kph)
|
| 7 Forward | 24.20 mph (38.95 kph)
|
| 8 Forward | 32.00 mph (51.50 kph)
|
| Max Speed Forward | 32.00 mph (51.50 kph)
|
| Max Speed Reverse | 5.70 mph (9.17 kph)
|
| Number of Forward Gears | 8
|
| Number of Reverse Gears | 1
|
| Reverse | 5.70 mph (9.17 kph)
|
| Transmission Type | 8-speed automatic Powershift with Electronic Control
|
| Travel Speed - Maximum | 32.00 mph (51.50 kph)
|
Weights
| Front Axel - loaded | 67,093.30 lbs (30,433.05 kg)
|
| Front Axle - empty | 50,177.30 lbs (22,760.07 kg)
|
| Operating Weight | 124,590.00 lbs (56,513.14 kg)
|
| Rear Axle - empty | 23,611.60 lbs (10,710.05 kg)
|
| Rear Axle - loaded | 59,496.20 lbs (26,987.06 kg)
|
| Total Operating - empty | 73,788.80 lbs (33,470.08 kg)
|
| Total Operating - Loaded | 126,589.50 lbs (57,420.10 kg)
|
Weights - Standard, Tandem
| Front Axle | 50,176.00 lbs (22,759.48 kg)
|
| Front Axle Weight - Loaded | 67,092.00 lbs (30,432.46 kg)
|
| Rear Axle | 23,612.00 lbs (10,710.24 kg)
|
| Rear Axle - Weight - Loaded | 59,497.00 lbs (26,987.42 kg)
|
| Scraper Shipping | 22,461.00 lbs (10,188.15 kg)
|
| Total Operating - Empty | 73,789.00 lbs (33,470.17 kg)
|
| Total Operating - Loaded | 126,589.00 lbs (57,419.88 kg)
|
| Total Shipping | 72,455.00 lbs (32,865.08 kg)
|
| Tractor Shipping | 49,994.00 lbs (22,676.93 kg)
|
