621K

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
General
180° Curb-to-Curb Turning Width 38.71 ft
Fuel Tank Refill Capacity - Scraper 201 gal (US)
Maximum Depth of Cut 12.4 in
Maximum Depth of Spread 21.3 in
Overall Shipping Height 13.22 ft
Overall Width 11.71 ft
Rated Load 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Scraper Capacity - Heaped 24 yd³
Scraper Capacity - Struck 17.1 yd³
Tires - Scraper 33.25R29**E3
Tires - Tractor Drive 33.25R29**E3
Top Speed - Loaded 33.5 mile/h
Width - Cut 10.3 ft


Engine
Engine Model - Tractor Cat C13 ACERT™
Flywheel Power - Tractor 407 HP
Note Cat C13 ACERT engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Rated Engine RPM - Tractor 2000 r/min


Tractor Engine
Flywheel Power - Tractor/Scraper 304 kW (407 hp)


Scraper Bowl
Scraper Capacity - Heaped 24 yd³


Transmission
Top Speed - Loaded 33.5 mile/h


Service Refill Capacities
Cooling System 11.89 gal (US)
Crankcase 8.08 gal (US)
Diesel Exhaust Fluid 8.057 gal (US)
Fuel Tank 216.09 gal (US)
Hydraulic System 21.926 gal (US)
Transmission System 24.76 gal (US)


Dimensions
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
Length - Maximum (Push-Pull) 613.2 in
Length - Overall Machine - Standard 551.8 in
Width - Overall Machine - Ladder Down 149.2 in
Width - Rear Tire Centers 90.2 in


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


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) is 111.5 dB(A).
ROPS/FOPS Meets SAE and ISO standards


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


Travel Speeds - Runout
Transmission Gear - Eighth 33.5 mile/h
Transmission Gear - Fifth 13.6 mile/h
Transmission Gear - First 3.1 mile/h
Transmission Gear - Fourth 10.1 mile/h
Transmission Gear - Reverse 5.7 mile/h
Transmission Gear - Second 5.5 mile/h
Transmission Gear - Seventh 24.8 mile/h
Transmission Gear - Sixth 18.4 mile/h
Transmission Gear - Third 7.5 mile/h


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


BENEFITS & FEATURES


• Tractor Serviceability Improvement - The filter bank located at the rear of the engine compartment has undergone improvements for serviceability by raising the filter bank up for easier access.



• Engine Over Speed Protection - In the event of an engine over speed situation, the compression brake or brakes will automatically engage with no operator input. The machine determines the over speed condition based on rate of acceleration and applies compression brakes automatically.



• Advanced Cushion Hitch - With similar technology as the Cat® Advanced Ride Management seat suspension, this software allows the cushion hitch to prevent end stroke by having the ability to predict end stroke events and manage the rate of dampening. The desired result is improved hitch repair, reduced maintenance and improved operator ride in rough conditions.



• High Pressure Steering - 620K Series steering system design requires significantly less steering effort. The reduced steering effort will allow for decreased operator fatigue and a more efficient operator resulting in possible higher rates of production late in the work cycle.



• Draft Arm Overflow Guards - The open bowls now come standard with bowl side overflow guards to help prevent material from flowing over the bowl sides and falling onto the draft arms where material becomes lodged between the bowl side and draft arm resulting in decreased work cycle times.



• Auto Stall - In cold weather conditions the machine will use the Auto Stall feature to help warm up the transmission oil faster resulting in the machine shifting out of torque converter drive (2nd gear) faster than on previous models.



• Differential Lock Engagement Protection (Standard) - This standard feature allows the machine to prevent the operator from engaging the differential lock when damage could occur.



• Cab Improved - The interior of the K Series cabs has improved the operator comfort and visibility by redesigning the dash area and key pad placement.



• Machine Speed Limit - This feature is designed to take the place of top gear selection. If the machine top speed needs to be limited the operator can select the top speed through the display or the top speed can be set in ET. This will allow the machine to find the correct gear that works best for the engine and transmission. Allowing the engine and transmission to select the correct gear to pull the load in most cases resulting in a lower engine load factor and lower fuel burn verses using top gear selection that required the machine to run at engine speeds at or close high idle.



• Ground Speed Control - Ground Speed Control sets the desired top speed by the operator if job site conditions or segment speed limits require a speed less than full run out. Machine Speed Limit is intended for use when top speed needs to be limited for longer durations and Ground Speed Control is intended for use when the top speed needs to be reduced for shorter segments or intermediate periods of time. The operator can set the desired top speed and the machine will find the correct gear that works best for the engine and transmission. Allowing the engine and transmission to select the correct gear to pull the load in most cases will result in a lower engine load factor and lower fuel burn verses top gear selection.

EQUIPMENT
Standard Equipment

POWER TRAIN - TRACTOR
  • Cat C13 ACERT 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

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)