Caterpillar 621G Scraper

Bowl

Heaped Capacity 22 cu yd (17 cu m)
Max Depth of Cut 13 in (33 cm)
Rated Payload 52,800 lbs (23,950 kg)
Struck Capacity 16 cu yd (12 cu m)
Width of Cut 9 ft (3 m)

Dimensions

Axle to Vertical Hitch Pin 17 in (43 cm)
Front of Tractor to Front Axle 120 in (306 cm)
Ground Clearance – Tractor 22 in (55 cm)
Height – Overall Shipping 146 in (371 cm)
Height – Scraper Blade Maximum 21 in (52 cm)
Height – Top of Cab 11 ft (3 m)
Length – Overall Machine 509 in (1,292 cm)
Overall Height 12 ft (4 m)
Overall Length 43 ft (13 m)
Overall Width 12 ft (4 m)
Rear Axle – Rear of Machine 84 in (214 cm)
Rim Radius 17 in (43 cm)
Tractor Ground Clearance 2 ft (1 m)
Wheel Base 25 ft (8 m)
Wheelbase 26 ft (8 m)
Width – Inside of Bowl 116 in (295 cm)
Width – Outside Rear Tires 120 in (305 cm)
Width – Overall Machine 137 in (347 cm)
Width – Rear Tire Center Lines 87 in (220 cm)
Width – Tractor 123 in (313 cm)

Engine

Tractor Engine Cat C15 ACERT

Hydraulic System

Apron Cylinder Bore 7 in (19 cm)
Apron Cylinder Stroke 24 in (60 cm)
Bowl Cylinder Bore 6 in (15 cm)
Bowl Cylinder Stroke 32 in (81 cm)
Compensator Settings – Cushion Hitch Circuit 2175 psi
Cushion Hitch Circuit 10 gpm (37 lpm)
Ejector Cylinder Bore 7 in (17 cm)
Ejector Cylinder Stroke 61 in (155 cm)
Relief Valve – Implement Circuit 2175 psi
Relief Valve – Steering Circuit 2250 psi
Scraper Circuit 72 gpm (273 lpm)
Secondary Steering Circuit 52 gpm (197 lpm)
Steering Circuit 55 gpm (208 lpm)

Operating Specifications

Alternator Supplied Amperage 75 amps
Cooling System Fluid Capacity 28 gal (106 l)
Differential Fluid Capacity 38 gal (144 l)
Engine Oil Fluid Capacity 10 gal (36 l)
Fuel Capacity 160 gal (606 l)
Hydraulic System Fluid Capacity 37 gal (140 l)
Operating Voltage 24 volts
Tire Size 33.25-R29
Transmission Fluid Capacity 19 gal (72 l)
Wheel Coolant Fluid Capacity – each 12 gal (45 l)

Scraper Bowl

Apron Closure Force 24,075 lbs (10,920 kg)
Apron Opening 70 in (178 cm)
Capacity – Struck 16 cu yd (12 cu m)
Capacity Heaped 22 cu yd (17 cu m)
Cutting Edge Thickness 1 in (2 cm)
Depth of Cut – Maximum 13 in (33 cm)
Depth of Spread – Maximum 20 in (52 cm)
Ground Clearance – Maximum 21 in (52 cm)
Rated Load 52,800 lbs (23,950 kg)
Width – Cut – To Router Bits 119 in (302 cm)

Service Refill Capacities – Tractor

Cooling System 14 gal (53 l)
Crankcase 10 gal (38 l)
Differential 32 gal (121 l)
Final Drive – Each 5 gal (20 l)
Hydraulic Reservoir 33 gal (125 l)
Transmission 18 gal (68 l)
Wheel Coolant – Each 12 gal (45 l)
Windshield Washer 2 gal (6 l)

Steering System

Hydraulic Output 55 gpm (208 lpm)
Steering Angle – Left 85 degrees
Steering Angle – Right 90 degrees
Width – 180 degrees Turn 36 ft (11 m)

Tractor Engine

Bore 6 in (14 cm)
Caterpillar Net Power 330 hp (246 kw)
Displacement 1,098 cu in (17,993 cu cm)
EEC 80/1269 330 hp (246 kw)
Gross Power 393 hp (293 kw)
Gross Power – Gears 3-8 394 hp (294 kw)
ISO 9249 330 hp (246 kw)
Make Caterpillar
Model C15 ACERT
Net Power 365 hp (272 kw)
Net Power – Gears 1-2 330 hp (246 kw)
Net Power – Gears 3-8 365 hp (272 kw)
Net Power – Tractor/Scraper 246 kW (330)
SAE J1349 326 hp (243 kw)
Stroke 7 in (18 cm)

Transmission

1 Forward 3 mph (5 kph)
2 Forward 6 mph (9 kph)
3 Forward 8 mph (12 kph)
4 Forward 10 mph (16 kph)
5 Forward 14 mph (22 kph)
6 Forward 18 mph (29 kph)
7 Forward 24 mph (39 kph)
8 Forward 32 mph (51 kph)
Max Speed Forward 32 mph (51 kph)
Max Speed Reverse 6 mph (9 kph)
Number of Forward Gears 8
Number of Reverse Gears 1
Reverse 6 mph (9 kph)
Transmission Type 8-speed automatic Powershift with Electronic Control
Travel Speed – Maximum 32 mph (51 kph)

Weights

Front Axel – loaded 67,093 lbs (30,433 kg)
Front Axle – empty 50,177 lbs (22,760 kg)
Operating Weight 124,590 lbs (56,513 kg)
Rear Axle – empty 23,612 lbs (10,710 kg)
Rear Axle – loaded 59,496 lbs (26,987 kg)
Total Operating – empty 73,789 lbs (33,470 kg)
Total Operating – Loaded 126,590 lbs (57,420 kg)

Weights – Standard, Tandem

Front Axle 50,176 lbs (22,759 kg)
Front Axle Weight – Loaded 67,092 lbs (30,432 kg)
Rear Axle 23,612 lbs (10,710 kg)
Rear Axle – Weight – Loaded 59,497 lbs (26,987 kg)
Scraper Shipping 22,461 lbs (10,188 kg)
Total Operating – Empty 73,789 lbs (33,470 kg)
Total Operating – Loaded 126,589 lbs (57,420 kg)
Total Shipping 72,455 lbs (32,865 kg)
Tractor Shipping 49,994 lbs (22,677 kg)
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