621F Wheel Tractor-Scrapers

Overview & Specifications

Engine

Tractor Engine

3406C

3406C

Tractor Engine

Gross Power - Gears 1-2

347 hp

259 kW

Net Power - Gears 1-2

330 hp

246 kW

Caterpillar Net Power

333 hp

246 kW

ISO 9249

330 hp

246 kW

EEC 80/1269

330 hp

246 kW

SAE J1349

327 hp

244 kW

Bore

5.4 in

137 mm

Stroke

6.5 in

165 mm

Displacement

893 in3

14.6 L

Scraper Bowl

Scraper Capacity: Heaped

30 yd3

15.3 m3

Rated Load

48000 lb

21800 kg

Capacity Struck

14 yd3

10.7 m3

Depth of Cut - max.

13.11 in

333 mm

Width of Cut, to Router Bits

119 in

3023 mm

Ground Clearance - max.

20.5 in

522 mm

Cutting Edge - thickness

1.14 in.

29 mm

Hyd. Penetration Force - 621G

33840 lb

150.4 kN

Depth of Spread - max.

70.1 in

1780 mm

Apron Opening

70.1 in

1780 mm

Apron Closure Force

24075 lb

107 kN

Transmission

1 Forward

3.1 mph

5 km/h

2 Forward

5.6 mph

9 km/h

3 Forward

7.1 mph

11.4 km/h

4 Forward

9.6 mph

15.4 km/h

5 Forward

12.9 mph

20.8 km/h

6 Forward

17.5 mph

28.2 km/h

7 Forward

23.6 mph

38 km/h

8 Forward

31.9 mph

51.3 km/h

Reverse

5.7 mph

9.2 km/h

Hydraulics

Bowl Cylinder Bore

6 in

152 mm

Bowl Cylinder Stroke

32 in

813 mm

Apron Cylinder Bore

7.25 in

184 mm

Apron Cylinder Stroke

24 in

600 mm

Ejector Cylinder Bore

6.5 in

165 mm

Ejector Cylinder Stroke

61 in

1549 mm

Steering Circuit

52 gal/min

197 L/min

Scraper Circuit

65.5 gal/min

284 L/min

Cushion Hitch Circuit

9.7 gal/min

35.5 L/min

Secondary Steering Circuit

37 gal/min

140 L/min

Relief Valve - Steering Circuit

2250 psi

15500 kPa

Relief Valve - Implement Circuit

2150 psi

14.8 kPa

Steering

Width - 180° Turn

35.75 ft

10.9 m

Steering Angle – Right

90°

90°

Steering Angle – Left

85°

85°

Hydraulic Output

52 gal/min

197 L/min

Ground-Driven Secondary Steering System

39.9 gal/min

150 L/min

Service Refill Capacities – Tractor

Crankcase

9.5 gal

36 L

Transmission

19 gal

72 L

Differential

43 gal

163 L

Final Drive (per side)

5 gal

19 L

Cooling System

22 gal

83 L

Hydraulic Reservoir

37 gal

140 L

Wheel Coolant (each)

12 gal

45 L

Dimensions

Width - overall machine

136 in

3454 mm

Width - tractor

117 in

2972 mm

Width - rear tire center lines

87 in

2210 mm

Width - inside of bowl

116 in

2946 mm

Width - outside rear tires

120 in

3048 mm

Height - overall shipping

132 in

3353 mm

Height - top of cab

133 in

3378 mm

Ground Clearance, Tractor

22 in

559 mm

Front of Tractor to Front Axle

125 in

3175 mm

Axle to Vertical Hitch Pin

17 in

432 mm

Height - scraper blade max.

21 in

533 mm

Wheelbase

304 in

7722 mm

Length - overall machine

507 in

12878 mm

Rear Axle to Rear of Machine

85 in

2159 mm

Weights - Standard, tandem

Total Shipping

69658 lb

31591 kg

Tractor Shipping

47943 lb

21743 kg

Scraper Shipping

21715 lb

9848 kg

Total Operating - empty

70715 lb

32085 kg

Front Axle

48109 lb

21818 kg

Rear Axle

22638 lb

10267 kg

Total Operating - loaded

118707 lb

53860 kg

Front Axle Weight - loaded

62915 lb

28546 kg

Rear Axle Weight - loaded

55792 lb

25314 kg

Weights

Operating Weight

70715 lb

32085 kg