Our wheel tractor-scrapers have long been considered the basic method of moving volumes of material, and the Cat® 621 Wheel Tractor-Scraper is no exception. Known for its ability to be push-loaded and high travel speeds, it’s always an earthmover’s first tool of choice when working in challenging load areas. With an open bowl and a single engine, this machine is designed to handle a wide range of material types ranging from sand to ripped rock 609.6 mm (24 “) or less in size.
Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long
Improvements in fuel efficiency and responsive APECS transmission controls deliver more productivity in most applications
New safety features help operators be more productive and work more efficiently all day long
| Maximum Depth of Cut | 12.4 in |
|---|---|
| Fuel Tank Refill Capacity - Scraper | 216.1 gal (US) |
| 180° Curb-to-Curb Turning Width | 38.71 ft |
| Scraper Capacity - Heaped | 24 yd³ |
| Overall Width | 11.75 ft |
| Maximum Depth of Spread | 21.3 in |
| Overall Shipping Height | 13.22 ft |
| Tires - Tractor Drive | 33.25R29**E3 |
| Width - Cut | 10.3 ft |
| Scraper Capacity - Struck | 17.1 yd³ |
| Top Speed - Loaded | 33.5 mile/h |
| Tires - Scraper | 33.25R29**E3 |
| Rated Load | 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons) |
| Note | Cat® C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards. |
|---|---|
| Flywheel Power - Tractor | 407 hp |
| Rated Engine RPM - Tractor | 2000 r/min |
| Engine Model - Tractor | Cat® C13 |
| Flywheel Power - Tractor/Scraper | 304 kW (407 hp) |
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| Scraper Capacity - Heaped | 24 yd³ |
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| Top Speed - Loaded | 33.5 mile/h |
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| Fuel Tank | 216.09 gal (US) |
|---|---|
| Crankcase | 8.08 gal (US) |
| Hydraulic System | 21.926 gal (US) |
| Diesel Exhaust Fluid | 8.057 gal (US) |
| Cooling System | 11.89 gal (US) |
| Transmission System | 24.76 gal (US) |
| Width - Overall Machine | 141.1 in |
|---|---|
| Width - Tractor | 133.1 in |
| Width - Inside of Bowl | 120 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 |
| Wheel Base | 314.9 in |
| Rear Axle - Rear of Machine | 114.1 in |
| Width - Overall Machine - Ladder Down | 149.2 in |
| Length - Overall Machine - Standard | 551.8 in |
| Length - Maximum (Push-Pull) | 613.2 in |
| Width - Rear Tire Centers | 90.2 in |
| Overall Length | 45.9 ft |
|---|---|
| Operating Weight - Empty | 79787 lb |
| Operating Weight - Empty | 80630 lb |
|---|---|
| Overall Length - With Bail Down | 51.1 ft |
| Exterior Sound Level | The exterior sound power level for the standard machine (ISO 6393:2008) is 118 dB(A). |
|---|---|
| ROPS/FOPS | Meets SAE and ISO standards |
| Reverse Alarm | ISO 9533:2010 |
|---|---|
| Brakes | ISO 3450:1996 |
| 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 |
| Steering System | ISO 5010:2007 |
| Seat Belt | SAE J386:JUN1985 |
| Transmission Gear - Eighth | 33.5 mile/h |
|---|---|
| Transmission Gear - Third | 7.5 mile/h |
| Transmission Gear - Fourth | 10.1 mile/h |
| Transmission Gear - First | 3.1 mile/h |
| Transmission Gear - Fifth | 13.6 mile/h |
| Transmission Gear - Reverse | 5.7 mile/h |
| Transmission Gear - Seventh | 24.8 mile/h |
| Transmission Gear - Sixth | 18.4 mile/h |
| Transmission Gear - Second | 5.5 mile/h |
| Ejector Retract | 6.7 s |
|---|---|
| Bail Raise | 1.8 s |
| Apron Raise | 2.95 s |
| Apron Lower | 3.8 s |
| Ejector Extend | 5.2 s |
| Bowl Raise | 3 s |
| Bowl Lower | 3.5 s |
| Bail Lower | 3.2 s |
