WHEEL TRACTOR-SCRAPERS


621G WHEEL TRACTOR SCRAPER
621G Wheel Tractor Scraper

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SPECIFICATIONS

Units: US | Metric

Tractor Engine

Transmission

Units: US | Metric

1 Forward

3.2 mph

5.1 km/h

2 Forward

5.8 mph

9.3 km/h

3 Forward

7.5 mph

12.1 km/h

4 Forward

10.1 mph

16.3 km/h

5 Forward

13.6 mph

21.9 km/h

6 Forward

18.2 mph

29.3 km/h

7 Forward

24.2 mph

38.9 km/h

8 Forward

32 mph

51.5 km/h

Reverse

5.7 mph

9.2 km/h

Travel Speed Maximum

32 mph

51.5 km/h

Scraper Bowl

Apron Closure Force

24075 lb

107 kN

Apron Opening

70 in

1780 mm

Capacity Heaped

22 yd3

17 m3

Capacity Struck

15.7 yd3

12 m3

Cutting Edge - thickness

0.88 in.

22 mm

Depth of Cut - max.

13.1 in

333 mm

Depth of Spread - max.

20.4 in

519 mm

Ground Clearance - max.

20.6 in

522 mm

Rated Load

52800 lb

23950 kg

Width of Cut, to Router Bits

119 in

3023 mm

Hydraulics

Apron Cylinder Bore

7.25 in

184 mm

Apron Cylinder Stroke

23.5 in

597 mm

Bowl Cylinder Bore

6 in

152 mm

Bowl Cylinder Stoke

32 in

813 mm

Compensator Setting - Cushion Hitch Circuit

2175 psi

16000 kPa

Cushion Hitch Circuit

9.8 gal/min

37 L/min

Ejector Cylinder Bore

6.5 in

165 mm

Ejector Cylinder Stroke

61 in

1549 mm

Relief Valve - Implement Circuit

2175 psi

15000 kPa

Relief Valve - Steering Circuit

2250 psi

15500 kPa

Scraper Circuit

72.1 gal/min

273 L/min

Secondary Steering Circuit

52 gal/min

147 L/min

Steering Circuit

55 gal/min

209 L/min

Dimensions

Axle to Vertical Hitch Pin

17 in

432 mm

Front of Tractor to Front Axle

120.4 in

3058 mm

Ground Clearance, Tractor

21.8 in

553 mm

Height - overall shipping

145.9 in

3705 mm

Height - scraper blade max.

20.6 in

522 mm

Height - top of cab

134.8 in

3423 mm

Length - overall machine

508.5 in

12917 mm

Rear Axle to Rear of Machine

84.3 in

2142 mm

Rim radius

17 in

432 mm

Wheelbase

304 in

7722 mm

Width - inside of bowl

116 in

2946 mm

Width - outside rear tires

120 in

3048 mm

Width - overall machine

136.5 in

3467 mm

Width - rear tire center lines

86.6 in

2200 mm

Width - tractor

123.2 in

3130 mm

Tractor Engine

Bore

5.7 in

145 mm

Caterpillar Net Power

330 hp

246 kW

Displacement

1098 in3

18 L

EEC 80/1269

330 hp

246 kW

Gross Power - Gears 1-2

359 hp

268 kW

Gross Power - Gears 3-8

394 hp

294 kW

ISO 9249

330 hp

246 kW

Net Power - Gears 1-2

330 hp

246 kW

Net Power - Gears 3-8

365 hp

272 kW

Net Power - Tractor/Scraper

SAE J1349

326 hp

243 kW

Stroke

7.2 in

183 mm

Service Refill Capacities - Tractor

Cooling System

14 gal

73 L

Crankcase

10 gal

38 L

Differential

32 gal

121 L

Final Drive (per side)

5.3 gal

20 L

Hydraulic Reservoir

33 gal

125 L

Transmission

18 gal

68 L

Wheel Coolant (each)

12 gal

45 L

Windshield Washer

1.5 gal

6 L

Weights - Standard, tandem

Front Axle

50176 lb

22760 kg

Front Axle Weight - loaded

67092 lb

30433 kg

Rear Axle

23612 lb

10710 kg

Rear Axle Weight - loaded

59497 lb

26987 kg

Scraper Shipping

22461 lb

10118 kg

Total Operating - empty

73789 lb

33470 kg

Total Operating - loaded

126589 lb

57420 kg

Total Shipping

72455 lb

32865 kg

Tractor Shipping

49994 lb

22677 kg

Steering

Hydraulic Output

55 gal/min

209 L/min

Steering Angle - left

Steering Angle - right

Width - 180° Turn

35.9 ft

10.9 m

Engine

Tractor Engine

ACERT technology reduces emissions during the combustion process by using advanced technology in the air and fuel systems, in conjunction with integrated electronics. Caterpillar meets emission regulations at the combustion source rather than recycling exhaust gases.

Electronically controlled Caterpillar planetary power shift transmission with 8 forward and one reverse speed. Gears 1 & 2 operate in converter drive for increased torque capability during cut and fill operations. Gears 3 – 8 operate in direct-drive for efficiency during the haul. Reverse gear operates in converter drive.

The electrical system has been redesigned to utilize three electronic control modules (ECM) on the tractor instead of four.

Simple and easy to operate, the joystick enhances the productivity of operators of all skill levels. Requires less force to control the critical scraper functions and requires less lever travel. 1) Bowl (forward & back) 2) Ejector (side to side) 3) Apron (thumb rocker switch) 4) Transmission Hold 5) Cushion Hitch 6) Trigger (not shown - is on front of joystick) * Standard open bowl does not have a trigger.

Features a new quad-gauge layout showing engine coolant temp, transmission / torque converter oil temp, fuel level, and system air pressure.

Maintenance and service points for the engine are grouped on the right-hand side for easy access. They include the engine air cleaner, engine oil check and fill, fuel filters and priming, coolant level sight glass, window washer bottle, air conditioning dryer cartridge, ether starting aid canister, engine oil filter, fan drive lubrication, and sampling ports for the engine oil and coolant. · Spin-on fluid filters for all but the main hydraulic filter · Cab wiring harness redesigned and relocated for better serviceability

621G STANDARD EQUIPMENT
ELECTRICAL
OPERATOR ENVIRONMENT
POWER TRAIN
OTHER STANDARD EQUIPMENT
621G OPTIONAL EQUIPMENT
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