CAT 621K Motor Scraper


Dimensions

Rear Axle – Rear Of Machine 114.1 in (2898.14 mm)
Axle To Vertical Hitch Pin 21.3 in (541.02 mm)
Front Of Tractor To Front Axle 122.8 in (3119.12 mm)
Width – Tractor 133.1 in (3380.74 mm)
Ground Clearance – Tractor 21.9 in (556.26 mm)
Height – Overall Shipping 158.6 in (4028.44 mm)
Height – Scraper Blade Maximum 20.5 in (520.71 mm)
Height – Top Of Cab 11.85 ft in (0.31 m)
Length – Maximum (Push-Pull) 613.21 in (15575.28 mm)
Length – Overall Machine – Standard 551.8 in (14015.72 mm)
Width – Rear Tire Centers 90.2 in (2291.08 mm)
Width – Overall Machine – Ladder Down 149.2 in (3789.68 mm)
Width – Overall Machine 141.1 in (3583.94 mm)
Width – Outside Rear Tires 128.9 in (3274.06 mm)
Width – Inside Of Bowl 120 in (3048 mm)
Wheel Base 26.25 ft in (0.67 m)

General

Overall Width 11.71 ft in (3.57 m)
Fuel Tank Refill Capacity – Scraper 201 gal (760.87 L)
Scraper Capacity – Heaped 24 yd3 (18.35 m3)
Scraper Capacity – Struck 17.11 yd3 (13.08 m3)
Tires – Scraper 33.25R29**E3
Tires – Tractor Drive 33.25R29**E3
Top Speed – Loaded 33.5 mph (53.92 km/h)
180 Degrees Curb-To-Curb Turning Width 38.71 ft in (11.8 m)
Width – Cut 10.3 ft in (3.14 m)
Overall Shipping Height 13.22 ft in (4.03 m)
Maximum Depth Of Cut 12.4 in (314.96 mm)
Rated Load 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Maximum Depth Of Spread 21.3 in (541.02 mm)

Non Push-Pull

Overall Length 45.9 ft in (14 m)
Operating Weight – Empty 79787 lb (36190.78 kg)

Engine Details

Note Cat C13 ACERT engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Flywheel Power – Tractor 407 hp (303.5 kw)
Engine Model – Tractor Cat C13 ACERT
Rated Engine Rpm – Tractor 2000 rpm

Tractor Engine

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

Transmission

Top Speed – Loaded 33.5 mph (54 km/h)

Service Refill Capacities

Cooling System 11.9 gal (45.1 L)
Fuel Tank Capacity 216.1 gal (818 L)
Crankcase 8.1 gal (30.6 L)
Hydraulic System 22 gal (83 L)
Diesel Exhaust Fluid 8.1 gal (30.5 L)
Transmission System 24.8 gal (93.8 L)

Cab

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

Scraper Bowl

Scraper Capacity – Heaped 24 yd3 (18.4 m3)

Implement Cycle Times

Bowl Raise 3 s
Bowl Lower 3.5 s
Ejector Extend 5.2 s
Ejector Retract 6.7 s
Apron Raise 2.95 s
Apron Lower 3.8 s
Bail Raise 1.8 s
Bail Lower 3.2 s

Safety Criteria Compliance Standards

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

Travel Speeds – Runout

Transmission Gear – First 3.1 mph (5 km/h)
Transmission Gear – Second 5.5 mph (8.9 km/h)
Transmission Gear – Third 7.5 mph (12.1 km/h)
Transmission Gear – Fourth 10.1 mph (16.3 km/h)
Transmission Gear – Fifth 13.6 mph (21.9 km/h)
Transmission Gear – Sixth 18.4 mph (29.7 km/h)
Transmission Gear – Seventh 24.8 mph (40 km/h)
Transmission Gear – Eighth 33.5 mph (54 km/h)
Transmission Gear – Reverse 5.7 mph (9.2 km/h)

Push-Pull

Operating Weight – Empty 80630 lb (36573.2 kg)
Overall Length – With Bail Down 51.1 ft in (15.6 m)
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