621K Wheel Tractor-Scraper

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.

Specifications
Standard & Optional Equipment

Download Specifications

Rated Load ( )
Fuel Tank Refill Capacity - Scraper 201 gal (US) (763 l)
180° Curb-to-Curb Turning Width 38.71 ft (11.8 m)
Overall Shipping Height 13.22 ft (4.03 m)
Overall Width 11.71 ft (3.57 m)
Top Speed - Loaded 33.5 mile/h (53.9 km/h)
Scraper Capacity - Heaped 24 yd³ (18.4 m³)
Width - Cut 10.3 ft (3.14 m)
Maximum Depth of Cut 12.4 in (315 mm)
Tires - Scraper ( )
Maximum Depth of Spread 21.3 in (540 mm)
Scraper Capacity - Struck 17.1 yd³ (13 m³)
Rated Engine RPM - Tractor 2000 r/min (2000 r/min)
Flywheel Power - Tractor 407 HP (304 kW)
Engine Model - Tractor ( )
Scraper Capacity - Heaped 24 yd³ (18.4 m³)
Top Speed - Loaded 33.5 mile/h (53.9 km/h)
Hydraulic System 21.926 gal (US) (83 l)
Fuel Tank 216.09 gal (US) (818 l)
Front of Tractor to Front Axle 122.8 in (3119 mm)
Axle to Vertical Hitch Pin 21.3 in (540 mm)
Wheel Base 314.9 in (7998 mm)
Rear Axle - Rear of Machine 114.1 in (2898 mm)
Length - Overall Machine - Standard 551.8 in (14015 mm)
Length - Maximum (Push-Pull) 613.2 in (15576 mm)
Width - Rear Tire Centers 90.2 in (2290 mm)
Overall Length 45.9 ft (14.02 m)
Operating Weight - Empty 79787 lb (36185 kg)
Overall Length - With Bail Down 51.1 ft (15.58 m)
Operating Weight - Empty 80630 lb (36567 kg)
ROPS/FOPS ( )
Exterior Sound Level ( )
Seat Belt ( )
Reverse Alarm ( )
Rollover Protection Structure (ROPS) ( )
Brakes ( )
Falling Object Protective Structure (FOPS) ( )
Steering System ( )
Transmission Gear - Third 7.5 mile/h (12.1 km/h)
Transmission Gear - Reverse 5.7 mile/h (9.2 km/h)
Transmission Gear - First 3.1 mile/h (5 km/h)
Transmission Gear - Seventh 24.8 mile/h (39.9 km/h)
Transmission Gear - Fifth 13.6 mile/h (21.9 km/h)
Transmission Gear - Eighth 33.5 mile/h (53.9 km/h)
Transmission Gear - Fourth 10.1 mile/h (16.3 km/h)
Transmission Gear - Second 5.5 mile/h (8.9 km/h)
Transmission Gear - Sixth 18.4 mile/h (29.6 km/h)
Bail Lower 3.2 s (3.2 s)
Ejector Extend 5.2 s (5.2 s)
Apron Lower 3.8 s (3.8 s)
Bowl Raise 3 s (3 s)
Bowl Lower 3.5 s (3.5 s)
Apron Raise 2.95 s (2.95 s)
Bail Raise 1.8 s (1.8 s)
Ejector Retract 6.7 s (6.7 s)
Height - Scraper Blade Maximum 20.5 in (520 mm)
Height - Overall Shipping 158.6 in (4029 mm)
Width - Outside Rear Tires 128.9 in (3275 mm)
Width - Tractor 133.1 in (3381 mm)
Height - Top of Cab 142.2 in (3612 mm)
Ground Clearance - Tractor 21.9 in (557 mm)
Width - Overall Machine 141.1 in (3585 mm)
Tires - Tractor Drive ( )
Note ( )
Flywheel Power - Tractor/Scraper ( )
Cooling System 11.89 gal (US) (45 l)
Crankcase 8.08 gal (US) (30.58 l)
Diesel Exhaust Fluid 8.057 gal (US) (30.5 l)
Transmission System 24.76 gal (US) (93 l)
Width - Overall Machine - Ladder Down 149.2 in (3790 mm)
Width - Inside of Bowl 120 in (3048 mm)

Standard Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

POWER TRAIN - TRACTOR

Cat C13 engine with MEUI™
Cat engine brake
Electric start, 24 Volt
Air cleaner, dry type with precleaner
Fan, hydraulic
Ground level engine shutdown
Radiator, aluminum unit core, 9 fins per inch
Guard, crankcase
Muffler (only for less or non-regulated regions engine arrangement only)
Starting aid, ether
Braking system: - Primary and secondary, wet disc, hydraulic - Parking, hydraulic-released, spring-applied - Throttle lock
Transmission: - 8-speed planetary power shift - ECPC control - APECS software - Programmable top gear selection - Transmission hold - Differential lock - Guard, power train - Standard tire spin reduction - Ground speed control - Machine speed limit - Differential lock protection

POWER TRAIN - SCRAPER

Braking system: - Primary and secondary, wet disc, hydraulic

ELECTRICAL - TRACTOR

Alternator, 150 Amp
Batteries (4), 12V, 1,000 CCA, maintenance free, high output
Electrical system, 24V
Lighting system: - Headlights, halogen - Turn signals with hazard function, LED floodlights, (2) cutting edge (1) bowl, halogen side vision (2)
Starting/charging receptacle

ELECTRICAL - SCRAPER

Alarm, backup
Lighting system: - Brake lights, LED - Turn signals with hazard function, LED

OPERATOR ENVIRONMENT - TRACTOR

HVAC system, heat, AC, defrost
Thermostat control of HVAC system
Coat hook
Lunchbox platform with holding strap
Diagnostic connection (2)
12V power ports (2)
Differential lock (1)
Dome courtesy light
Horn, electric
T-Handle implement control
Mirror, rearview
Radio ready
ROPS/FOPS cab, pressurized
Keypad switches: - Throttle lock - Wipers/washers - Hazard lights - Retarding level select - Work lights on, off - Information mode on Messenger Display
Safety tab rocker switches
Seat belt, static two-piece
Seat, Cat Advanced Ride Management (ARM), Cat Comfort Series 3, rotates 30 degrees
Steering wheel, tilt, telescoping, padded
Windows, right side emergency egress
Windows, sliding
Windows, laminated, zipped in
Windshield wipers, front and rear windows, includes washers
Door lock
Messenger Display
Gauges, warnings include: - Coolant temperature - Engine oil temperature - Hydraulic oil temperature - DPF temperature - Fuel level - Park brake - Implement lockout - Brake system - Regeneration required - Throttle lock - System voltage - Secondary steering - Bail down - Ejector auto - Differential lock - Apron float - Transmission hold - Cushion hitch - High beam lights - Action lamp - Engine speed, rpm - Gear selection - DEF fill levels

FLUIDS

Extended Life Coolant to -37° C (-34° F)

OTHER STANDARD EQUIPMENT - TRACTOR

Advanced cushion hitch
Accumulators (cushion hitch) with Canadian Registration Number (CRN)
Fast oil change
Fenders, non-metallic
Heater, engine coolant 120V
Rims (2)
Tow pin, front
Vandalism locks
Heater, engine coolant 120V

OTHER STANDARD EQUIPMENT - SCRAPER

Bowl: - 18.4 m3 (24 yd3), heaped - 14.1 m3 (18.4 yd3), struck
Vandalism locks
Hydraulic position sensing cylinders (bowl lift and apron)

Optional Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

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
Year of manufacture plate

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

SERVICE INSTRUCTIONS

Film arrangement - U.S. (ANSI)
Film arrangement - International (ISO)