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621 Partial Wheel Tractor-Scraper
631 Partial Wheel Tractor-Scraper

Engine

Tractor Engine Cat® C13 Cat® C18 -
Flywheel Power - Tractor 407 hp 570 hp -
Note Meets U.S. EPA Tier 4 Final or EU Stage V emission standards, or equivalent to U.S. EPA Tier 2, or equivalent to U.S. EPA Tier 3 and EU Stage IIIA. Meets U.S. EPA Tier 4 Final or EU Stage V emission standards, or equivalent to U.S. EPA Tier 2, or equivalent to U.S. EPA Tier 3 and EU Stage IIIA. -

Transmission

Top Speed - Loaded 33.5 mile/h 34.7 mile/h -
1 Forward 3.1 mile/h 3.4 mile/h -
2 Forward 5.5 mile/h 6.2 mile/h -
3 Forward 7.5 mile/h 7.7 mile/h -
4 Forward 10.1 mile/h 10.5 mile/h -
5 Forward 13.6 mile/h 14.1 mile/h -
6 Forward 18.4 mile/h 19 mile/h -
7 Forward 24.8 mile/h 25.7 mile/h -
8 Forward 33.5 mile/h 34.7 mile/h -
Reverse 5.7 mile/h 6.2 mile/h -

Standards

Brakes ISO 3450:2011 ISO 3450:2011 -
ROPS/FOPS ROPS: ISO 3471:2008 for up to 17 084 kg (37,664 lb). FOPS: ISO 3449:2005 Level II. ROPS: ISO 3471:2008. FOPS:ISO 3449:2005 Level II. -
Cab Seat Belt: SAE J386:JUN1985 Seat Belt: SAE J386:FEB2006 -

Steering

Width - 180° Turn 38.6 ft 40.2 ft -

Service Refill Capacities - Tractor

Fuel Tank 216.1 gal (US) 231 gal (US) -
Crankcase 9.7 gal (US) 13.7 gal (US) -
Transmission 25.5 gal (US) 29 gal (US) -
Differential 41.7 gal (US) 41.7 gal (US) -
Final Drive - Each 5 gal (US) 5 gal (US) -
Cooling System 11 gal (US) 19.8 gal (US) -
Hydraulic Reservoir 21.9 gal (US) 37.5 gal (US) -
Windshield Washer 1.3 gal (US) 1.3 gal (US) -
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