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    621 Wheel Tractor-Scraper
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    651 Wheel Tractor-Scraper
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    657 Wheel Tractor-Scraper
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    Tractor Engine
    Flywheel Power - Tractor/Scraper 304 kW (407 hp) 469kW (629 hp) 469kW (629 hp) / 353 kW (473 hp)
    Net Power - 469 kW/637 hp 469 kW/637 hp
    Gross Power (SAE J1995) - 637 hp 637 hp
    Net Power (ISO 14396) - 585 hp 637 hp
    Net Power (SAE J1349/ISO 9249) - 592 hp 592 hp
    Bore - 5.7 in 5.7 in
    Stroke - 7.2 in 7.2 in
    Displacement - 1105 in³ 1105 in³

    Scraper Bowl
    Scraper Capacity - Heaped 24 yd³ 44 yd³ 44 yd³
    Rated Load - 104058 lb 104058 lb
    Capacity - Struck - 32 yd³ 32 yd³
    Depth of Cut - Maximum - 17.3 in 16.4 in
    Width - Cut - To Router Bits - 12.5 ft 12.5 ft
    Ground Clearance - Maximum - 2.3 ft 2.3 ft
    Hyd. Penetration Force - 657G - 121000 lb 121000 lb
    Depth of Spread - Maximum - 26 in 26 in
    Apron Opening - 92 in 92 in
    Apron Closure Force - 39200 lb 39200 lb

    Transmission
    Top Speed - Loaded 33.5 mile/h 34.9 mile/h 33 mile/h
    1 Forward - 3.5 mile/h 3.5 mile/h
    2 Forward - 6.5 mile/h 6.5 mile/h
    3 Forward - 7.8 mile/h 7.8 mile/h
    4 Forward - 10.6 mile/h 10.6 mile/h
    5 Forward - 14.2 mile/h 14.2 mile/h
    6 Forward - 19.2 mile/h 19.2 mile/h
    7 Forward - 25.7 mile/h 25.7 mile/h
    8 Forward - 34.9 mile/h 34.9 mile/h
    Reverse - 6.7 mile/h 6.7 mile/h

    Dimensions
    Width - Overall Machine 141.1 in 14.3 ft 14.3 ft
    Width - Tractor 133.1 in 12.3 ft 12.3 ft
    Width - Inside of Bowl 120 in 12.07 ft 12.07 ft
    Width - Outside Rear Tires 128.9 in - -
    Height - Overall Shipping 158.6 in 15.29 ft 15.29 ft
    Height - Top of Cab 142.2 in 12.86 ft 12.86 ft
    Ground Clearance - Tractor 21.9 in 2.3 ft 2.3 ft
    Front of Tractor to Front Axle 122.8 in 14.93 ft 14.93 ft
    Axle to Vertical Hitch Pin 21.3 in 1.8 ft 1.8 ft
    Height - Scraper Blade Maximum 20.5 in 2.17 ft 2.17 ft
    Wheel Base 314.9 in 32.68 ft 32.68 ft
    Rear Axle - Rear of Machine 114.1 in 8.07 ft 8.07 ft
    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 - -
    Width - Rear Tire Center Lines - 9.21 ft 9.21 ft
    Width - Outside Bowl - Shipping Width - 12.98 ft 12.98 ft
    Length - Overall Machine - 58.96 ft 58.96 ft

    General
    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) - -

    Engine
    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 - -
    Tractor Engine - Cat C18 Cat C18
    Scraper Engine - - Cat C15

    Service Refill Capacities
    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) - -

    Non Push-Pull
    Overall Length 45.9 ft - -
    Operating Weight - Empty 79787 lb - -

    Push-Pull
    Operating Weight - Empty 80630 lb - -
    Overall Length - With Bail Down 51.1 ft - -

    Cab
    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 - -

    Safety Criteria Compliance 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 - -

    Travel Speeds - Runout
    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 - -

    Implement Cycle Times
    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 - -

    Weights - Push-Pull
    Total Shipping - 160505 lb 160505 lb
    Tractor Shipping - 93635 lb 93635 lb
    Scraper Shipping - 64068 lb 64068 lb
    Total Operating - Empty - 164244 lb 164244 lb
    Front Axle - 93842 lb 93842 lb
    Rear Axle - 66663 lb 66663 lb
    Total Operating - Loaded - 268302 lb 268302 lb
    Front Axle - Loaded - 134165 lb 134165 lb
    Rear Axle - Loaded - 130340 lb 130340 lb

    Steering
    Width - 180° Turn - Right - 44.6 ft 45.4 ft
    Width - 180° Turn - Left - 47.57 ft 47.57 ft
    Steering Angle - Right - 90 90
    Steering Angle - Left - 85 85

    Service Refill Capacities - Tractor
    Crankcase - 13.7 gal (US) 13.7 gal (US)
    Transmission - 35.9 gal (US) 35.9 gal (US)
    Differential - 36 gal (US) 36 gal (US)
    Final Drive - Each - 6 gal (US) 6 gal (US)
    Cooling System - 23.4 gal (US) 23.4 gal (US)
    Hydraulic Reservoir - 39.6 gal (US) 39.6 gal (US)
    Windshield Washer - 0.5 gal (US) 0.5 gal (US)

    Hydraulics
    Bowl Cylinder Bore - 7.08 in 7.08 in
    Bowl Cylinder Stroke - 37.4 in 37.4 in
    Apron Cylinder Bore - 7.08 in 7.08 in
    Apron Cylinder Stroke - 29.92 in 29.92 in
    Steering Circuit (@ High Idle) - 76.08 gpm 76.08 gpm
    Cushion Hitch Circuit - 19.54 gpm 19.54 gpm
    Secondary Steering Circuit - 14.52 gal/hr 14.52 gal/hr
    Relief Valve - Steering Circuit - 1959 psi 1959 psi
    Relief Valve - Implement Circuit - 1999 psi 1999 psi
    Compensator Settings - Cushion Hitch Circuit - 3002 psi 3002 psi
    Ejector Cylinder Stroke (Stage 1/ Stage 2) - - 38.32 in
    Implement Circuit (@ High Idle) - - 517 L/min

    Service Refill Capacities - Scraper
    Fuel Tank - 430 gal (US) 430 gal (US)
    Differential - 44 gal (US) 44 gal (US)
    Final Drive - Each - 7.8 gal (US) 7.8 gal (US)
    Transmission - 31.9 gal (US) 31.9 gal (US)
    Crankcase - 8.9 gal (US) 8.9 gal (US)
    Cooling System - 16.6 gal (US) 16.6 gal (US)

    Scraper Engine
    Net Power - - 353 kW/447 hp
    Gross Power (SAE J1995) - - 481 hp
    Net Power (ISO 14396) - - 480 hp
    Net Power (SAE J1349/ISO 9249) - - 415 hp
    Bore - - 5.4 in
    Stroke - - 6.75 in
    Displacement - - 928 in³
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