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Caterpillar 621G Wheel Tractor Scraper
Caterpillar 621G Wheel Tractor ScraperCaterpillar Wheel Tractor-Scrapers offer fast cycle times, with quick loading, high travel speeds and the ability to load and dump on the run. Rugged construction and easy maintenance assure long life with low operating costs. |  |  | |||
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 | Overview & Specifications | |  | Features & Benefits | | | Standard Equipment | | | Optional Equipment | | | Work Tools & Attachments | ||
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| Scraper Bowl | |
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| Capacity Heaped | 22 yd3 / 17 m3 |
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| Rated Load | 52800 lb / 23950 kg |
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| Capacity Struck | 15.7 yd3 / 12 m3 |
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| Depth of Cut - max. | 13.1 in / 333 mm |
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| Width of Cut, to Router Bits | 119 in / 3023 mm |
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| Ground Clearance - max. | 20.6 in / 522 mm |
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| Cutting Edge - thickness | .88 in. / 22 mm |
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| Hyd. Penetration Force - 621G | 33840 lb / 150.4 kN |
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| Depth of Spread - max. | 20.6 in / 522 mm |
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| Apron Opening | 70 in / 1780 mm |
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| Apron Closure Force | 24075 lb / 107 kN |
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| Transmission | |
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| Travel Speed Maximum | 32 mph / 51.5 km/h |
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| 1 Forward | 3.1 mph / 5 km/h |
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| 2 Forward | 4.7 mph / 7.6 km/h |
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| 3 Forward | 6.8 mph / 10.9 km/h |
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| 4 Forward | 9.2 mph / 14.8 km/h |
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| 5 Forward | 12.4 mph / 19.9 km/h |
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| 6 Forward | 16.7 mph / 26.9 km/h |
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| 7 Forward | 22.6 mph / 36.4 km/h |
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| 8 Forward | 32 mph / 51.5 km/h |
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| Reverse | 5.7 mph / 9.2 km/h |
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| Tractor Engine | |
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| Net Power - Tractor/Scraper | 246 kW (330 hp) |
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| Gross Power - Gears 1-2 | 359 hp / 268 kW |
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| Gross Power - Gears 3-8 | 394 hp / 294 kW |
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| Net Power - Gears 1-2 | 330 hp / 246 kW |
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| Net Power - Gears 3-8 | 365 hp / 272 kW |
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| Caterpillar Net Power | 330 hp / 246 kW |
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| ISO 9249 | 330 hp / 246 kW |
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| EEC 80/1269 | 330 hp / 246 kW |
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| SAE J1349 | 326 hp / 243 kW |
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| Bore | 5.5 in / 140 mm |
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| Stroke | 6.5 in / 165 mm |
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| Displacement | 928 in3 / 15.2 L |
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| Weights | |
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| Operating Weight | 124590 lb / 56513 kg |
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| Weights - Standard, tandem | |
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| Total Shipping | 72455 lb / 32865 kg |
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| Tractor Shipping | 49994 lb / 22677 kg |
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| Scraper Shipping | 22461 lb / 10118 kg |
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| Total Operating - empty | 73789 lb / 33470 kg |
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| Front Axle | 50176 lb / 22760 kg |
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| Rear Axle | 23612 lb / 10710 kg |
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| Total Operating - loaded | 126589 lb / 57420 kg |
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| Front Axle Weight - loaded | 67092 lb / 30433 kg |
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| Rear Axle Weight - loaded | 59497 lb / 26987 kg |
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| Dimensions | |
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| Width - overall machine | 136.5 in / 3467 mm |
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| Width - tractor | 123.2 in / 3130 mm |
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| Width - rear tire center lines | 85.8 in / 2180 mm |
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| Width - inside of bowl | 116 in / 2946 mm |
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| Width - outside rear tires | 120 in / 3048 mm |
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| Height - overall shipping | 145.9 in / 3705 mm |
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| Height - top of cab | 134.8 in / 3423 mm |
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| Ground Clearance, Tractor | 21.8 in / 553 mm |
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| Front of Tractor to Front Axle | 120.4 in / 3058 mm |
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| Rim radius | 17 in / 432 mm |
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| Axle to Vertical Hitch Pin | 17 in / 432 mm |
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| Height - scraper blade max. | 20.6 in / 522 mm |
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| Wheelbase | 304 in / 7722 mm |
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| Length - overall machine | 508.5 in / 12917 mm |
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| Rear Axle to Rear of Machine | 84.3 in / 2142 mm |
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| Bail Length - max. (push-pull) | 63.5 in / 1612 mm |
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| Extended Push Block (push-pull) | 109.7 in / 2786 mm |
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| Steering | |
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| Width - 180° Turn | 35.9 ft / 10.9 m |
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| Steering Angle - right | 90° |
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| Steering Angle - left | 85° |
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| Hydraulic Output | 55 gal/min / 209 L/min |
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| Service Refill Capacities - Tractor | |
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| Crankcase | 9.5 gal / 36 L |
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| Transmission | 19 gal / 72 L |
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| Differential | 38 gal / 144 L |
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| Final Drive (per side) | 5 gal / 19 L |
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| Cooling System | 28 gal / 107 L |
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| Hydraulic Reservoir | 37 gal / 140 L |
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| Wheel Coolant (each) | 12 gal / 45 L |
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| Windshield Washer | 1.5 gal / 6 L |
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| Hydraulics | |
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| Bowl Cylinder Bore | 6 in / 152 mm |
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| Bowl Cylinder Stoke | 32 in / 813 mm |
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| Apron Cylinder Bore | 7.25 in / 184 mm |
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| Apron Cylinder Stroke | 23.5 in / 597 mm |
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| Ejector Cylinder Bore | 6.5 in / 165 mm |
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| Ejector Cylinder Stroke | 61 in / 1549 mm |
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| Steering Circuit | 55 gal/min / 209 L/min |
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| Scraper Circuit | 65.5 gal/min / 284 L/min |
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| Cushion Hitch Circuit | 9.8 gal/min / 37 L/min |
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| Secondary Steering Circuit | 39.9 gal/min / 150 L/min |
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| Relief Valve - Steering Circuit | 2250 psi / 15500 kPa |
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| Relief Valve - Implement Circuit | 2175 psi / 15000 kPa |
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| Compensator Setting - Cushion Hitch Circuit | 2175 psi / 16000 kPa |
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