621K Wheel Tractor-Scraper

621K Wheel Tractor-Scraper

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Quick loading, high travel speeds and the ability to load and dump on the run yield fast cycle times, allowing Cat Wheel Tractor-Scrapers to consistently deliver high productivity at the lowest cost per ton.

General Data

180° Curb-to-Curb Turning Width
38.71 ft
Fuel Tank Refill Capacity: Scraper
201.0 gal
Maximum Depth of Cut
12.4 in
Maximum Depth of Spread
21.3 in
Overall Shipping Height
13.22 ft
Overall Width
11.71 ft
Rated Load
26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Scraper Capacity: Heaped
24.0 yd3
Scraper Capacity: Struck
17.1 yd3
Tires: Scraper
33.25R29**E3
Tires: Tractor Drive
33.25R29**E3
Top Speed (Loaded)
33.5 mph
Width of Cut
10.3 ft

Engine

Engine Model: Tractor
Cat C13 ACERTâ„¢
Flywheel Power: Tractor
407.0 hp
Note
Cat C13 ACERT engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Rated Engine RPM: Tractor
2000.0 RPM

Tractor Engine

Flywheel Power: Tractor/Scraper
304 kW (407 hp)

Scraper Bowl

Scraper Capacity: Heaped
24.0 yd3

Transmission

Top Speed (Loaded)
33.5 mph

Service Refill Capacities

Cooling System
11.89 gal
Crankcase
8.08 gal
Diesel Exhaust Fluid
8.0572 gal
Fuel Tank
216.09 gal
Hydraulic System
21.926 gal
Transmission System
24.76 gal

Dimensions

Width - Overall Machine
141.1 in
Width - Tractor
133.1 in
Width - Inside of Bowl
120.0 in
Width - Outside Rear Tires
128.9 in
Height - Overall Shipping
158.6 in
Height - Top of Cab
142.2 in
Ground Clearance - Tractor
21.9 in
Front of Tractor to Front Axle
122.8 in
Axle to Vertical Hitch Pin
21.3 in
Height - Scraper Blade Maximum
20.5 in
Wheelbase
314.9 in
Rear Axle to Rear of Machine
114.1 in
Length - Maximum (Push-Pull)
613.2 in
Length - Overall Machine (Standard)
551.8 in
Width - Overall Machine - Ladder Down
149.2 in
Width - Rear Tire Centers
90.2 in

Non Push-Pull

Operating Weight (Empty)
79787.0 lb
Overall Length
45.9 ft

Push-Pull

Operating Weight (Empty)
80630.0 lb
Overall Length (With Bail Down)
51.1 ft

Cab

Exterior Sound Level
The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
ROPS/FOPS
Meets SAE and ISO standards

Safety Criteria Compliance Standards

Brakes
ISO 3450:1996
Falling Object Protective Structure (FOPS)
ISO 3449:2005 Level II
Reverse Alarm
ISO 9533:2010
Rollover Protection Structure (ROPS)
ISO 3471:2008 for up to 17 084 kg (37,664 lb)
Seat Belt
SAE J386:JUN1985
Steering System
ISO 5010:2007

Travel Speeds (Runout)

Transmission Gear: Eighth
33.5 mph
Transmission Gear: Fifth
13.6 mph
Transmission Gear: First
3.1 mph
Transmission Gear: Fourth
10.1 mph
Transmission Gear: Reverse
5.7 mph
Transmission Gear: Second
5.5 mph
Transmission Gear: Seventh
24.8 mph
Transmission Gear: Sixth
18.4 mph
Transmission Gear: Third
7.5 mph

Implement Cycle Times

Apron Lower
3.8 Seconds
Apron Raise
2.95 Seconds
Bail Lower
3.2 Seconds
Bail Raise
1.8 Seconds
Bowl Lower
3.5 Seconds
Bowl Raise
3.0 Seconds
Ejector Extend
5.2 Seconds
Ejector Retract
6.7 Seconds
  • STEERING ARRANGEMENTS
    • Secondary Steering Arrangement
  • INTEGRATED TECHNOLOGIES
    • Sequence Assist Arrangement
    • Load Assist
    • Cat Grade Control with Load Assist
  • OTHER ATTACHMENTS
    • Camera arrangement - WAVS
    • Steering lock - external
    • Cab beacon
    • Air horn
    • Air horn and beacon
    • Fender, scraper
    • Guard, overflow
    • Wiring group
  • WORK LIGHT ATTACHMENTS
    • HID work lights
  • AMBIENT CAPABILITY ARRANGEMENTS
    • Cooling, high ambient HRC
    • Cooling, low ambient HRC
    • Cooling, high ambient LRC
    • Cooling, low ambient LRC
  • OTHER ATTACHMENTS
    • Year of manufacture plate
  • SERVICE INSTRUCTIONS
    • Film arrangement - U.S. (ANSI)
    • Film arrangement - International (ISO)