Caterpillar Performance Handbook, January 2017, SEBD0351-47

Specifications ● Single Engine Open Bowl ● Optional Push-Pull

Wheel Tractor-Scrapers

MODEL

621K

631K

Flywheel Power

304 kW

425 kW

407 hp

570 hp

35 808 kg

46 600 kg

Approx. OperatingWeight (Empty) ◀

78,943 lb

102,750 lb

18.3 m 3

Scraper Capacity: Struck Scraper Capacity: Heaped

13 m 3

17.1 yd 3

24 yd 3 34 yd 3

18.4 m 3

26 m 3

24 yd 3

Rated Load

26 127 kg

37 285 kg

57,610 lb

82,200 lb

Weight Distribution — Empty: Drive

65% 35%

67% 34%

Rear

Weight Distribution — Loaded: Drive

53% 47%

54% 46%

Rear

Engine Model

C13 ACERT

C18 ACERT

24

Emission Standards

Tier 4 Final/Stage IV/ Japan 2014 (Tier 4 Final)

Tier 4 Final/Stage IV/ Japan 2014 (Tier 4 Final)

Rated Engine RPM

2000

1900

18.1 L

Displacement

12.5 L

1105 in 3

763 in 3

Top Speed (Loaded)

53.9 km/h

55.8 km/h

33.5 mph

34.7 mph

180° Curb-to-CurbTurningWidth

18.25 m

19.94 m

59'11"

65'5"

Tires —Tractor/Scraper

33.25R29 ★★ E3

37.25R35 ★★ E3

Width of Cut

3.14 m

3.51 m

10'4" 12.4" 21.3"

11'6" 18.7" 17.8"

Maximum Depth of Cut Maximum Depth of Spread Fuel Tank Refill Capacity

315 mm 540 mm

475 mm 451 mm

763 L 31.5 L

874 L 31.5 L

201 U.S. gal 8.3 U.S. gal

231 U.S. gal 8.3 U.S. gal

Tractor DEF Tank

GENERAL DIMENSIONS: Non Push-Pull Height — Overall Shipping

4.03 m 7.99 m 14.02 m 3.57 m 2.29 m 2.28 m

3.89 m 8.81 m 15.04 m 3.94 m 2.46 m 2.46 m

13'2" 26'2"

12'9" 28'11" 49'4" 12'11"

Wheelbase

Overall Length Overall Width

45'10"

11'7"

Center Line of Scraper Tread Center Line of Tractor Tread

7'5" 7'4"

8'1" 8'1"

GENERAL DIMENSIONS: Push-Pull OperatingWeight (Empty) Overall Length (With Bail Down) Weight Distribution — Empty: Drive

37 154 kg 15.58 m

48 275 kg

81,910 lb

106,430 lb

16.64 m

51'1"

54'7"

65% 35%

68% 32%

Rear

Weight Distribution — Loaded: Drive

53% 47%

55%

Rear

45% ◀ Operating weight includes standard machine, coolant, lubricants, full fuel tank, and operator. Operating weights for the 621K and 631K are based on Tier 4 Final/ Stage IV/Japan 2014 (Tier 4 Final) platform machines. Deduct 243 kg (536 lb) for the operating weight for the 621K Tier 2/Stage II/Japan 2001 (Tier 2) equivalent. Deduct 430 kg (950 lb) for the operating weight for the 631K Tier 2/Stage II/Japan 2001 (Tier 2) equivalent. NOTE: WheelTractor-Scrapers are not emission certified in Japan market. Single Engine Open Bowl The Open Bowl Wheel Tractor-Scraper is available as a self-loading, 631K push pull or push-loaded hauling system with a broad material appetite.The broad material appetite allows the Open Bowl WheelTractor-Scraper to be used in general construction, heavy construction, mining, and waste applications. Open Bowl Advantages: ● Quick load/unload

Single Engine Advantages (Compared toTandem Engine): ● Lower fuel usage ● Lower gross vehicle weight ● Loads quickly with the aid of aTrack-TypeTractor and hauls to fill carrying minimum machine weight

● Spread evenly on-the-go ● Broad material appetite ● Aids in compaction ● Varying material conditions ● High production

Edition 47 24-3