623K Wheel Tractor-Scraper



Technical Specifications
Benefits and Features
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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.

Flywheel Power - Tractor/Scraper 304 kW (407 hp)
Engine Model Cat C13
Flywheel Power - Tractor 407 HP
Note C13 engine emits equivalent to U.S. EPA Tier 2/EU Stage II or U.S. EPA Tier 3/EU Stage III.
Rated Engine RPM 2000 r/min
Scraper Bowl
Scraper Capacity - Heaped 23 yd³
Top Speed - Loaded 33.5 mile/h
Height - Overall Shipping 158.9 in
Length - Overall Machine 542 in
Width - Overall Machine 141.1 in
Height - Top of Cab 142.6 in
Height - Scraper Blade Maximum 20.5 in
Width - Tractor 133.1 in
Width - Inside of Bowl 120 in
Width - Outside Rear Tires 128.9 in
Front of Tractor to Front Axle 122.8 in
Wheel Base 329.5 in
Rear Axle - Rear of Machine 89.7 in
Ground Clearance - Tractor 21.9 in
Axle to Vertical Hitch Pin 17 in
Height - Top of Elevator 148.3 in
Width - Overall Machine - Ladder Down 149.2 in
Width - Rear Tire Centers 90.2 in
Service Refill Capacities
Fuel Tank 216.09 gal (US)
Crankcase 8.08 gal (US)
Cooling System 11.89 gal (US)
Hydraulic System 21.926 gal (US)
Transmission System 24.76 gal (US)
Exterior Sound Level The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
ROPS/FOPS Meets ISO standards
Safety Criteria Compliance Standards
Brakes ISO 3450:2011
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
Bowl Lower 3.5 s
Bowl Raise 3 s
Ejector Extend 6.45 s
Ejector Retract 9.7 s
180° Curb-to-Curb Turning Width 38.71 ft
Elevator Flight Spacing 20 in
Fuel Tank Refill Capacity - Scraper 201 gal (US)
Maximum Depth of Cut 10.3 in
Maximum Depth of Spread 18.3 in
Maximum Floor Opening 4.4 ft
Number of Flights 15
Operating Weight - Empty 88061 lb
Overall Length 45.18 ft
Overall Shipping Height 12.37 ft
Overall Width 11.71 ft
Rated Load 25 038 kg (55,200 lb); 25.1 tonnes (27.6 tons)
Scraper Capacity - Heaped 23 yd³
Scraper Capacity - Struck 18.8 yd³
Tires - Scraper 33.25R29**E3
Tires - Tractor Drive 33.25R29**E3
Top Speed - Loaded 33.5 mile/h
Width - Cut 10.3 ft


  • Up to 7% additional elevator torque.
  • Up to 50% improvement in chain life.
  • Enhanced elevator drive sprocket for reduced chain wear.Improved scissor-style chain tension system for decreased
    sprocket wear, chain wear, and chain jumping.
  • Cat C13 engine offers increased power density with a combination
    of proven electronic, fuel, and air systems.
  • Use Ground Speed Control to set the desired top speed, and the
    machine will find the gear that works best for the engine and the
    transmission, providing a lower fuel burn.
    • The Machine Speed Limit feature replaces Top Gear Selection.
  • Advanced Productivity Electronic Control System (APECS) allows
    the engine and transmission to communicate on a high level. This
    communication allows the machine to better utilize the power
    and torque the engine is producing. The net result is moving more
  • Auto-Stall assists in quickly bringing the transmission to an
    operating temperature at start-up when the machine is working in a
    cold climate region.
  • Cat Payload Estimator for scrapers is an earthmoving solution for
    optimal payload and jobsite efficiency. Payload Estimator achieves on-the-go weighing by using bowl lift cylinder pressure during the loaded haul segment. Payload Estimator is optimized to be used with Sequence Assist, which provides increased productivity with less operator effort.


  • Reduce up to 14 individual operator commands per cycle with
    Sequence Assist (optional attachment).
  • Steer with less effort using the newly designed high-pressure
    steering system.
  • Enjoy interior improvements and a more ergonomic work
    environment with a 21% larger cab than the G Series cab.
  • Intuitive, ergonomic controls keep operators focused on their work.
  • Maintain desired cab temperature with automatic temperature


  • Brakes are hydraulically actuated wet disc brakes for the tractor
    and scraper.
  • Get in and out of the cab easier with the new powered access
    ladder system (optional attachment).
  • Enhance an operator’s awareness of site surroundings with the
    optional Work Area Vision System (WAVS).
  • Seat belt indicator provides visual and audible alerts when the seat
    belt is not in use.
  • Ground level, engine shut-off switch stops all fuel to the engine
    when activated and shuts down the machine.
  • Advanced Cushion Hitch allows the cushion hitch to prevent
    end stroke by having the ability to predict end stroke events
    and manage the rate of dampening, resulting in reduced hitch
    maintenance and improved operator ride in rough conditions.


  • The spacious cab features easy, intuitive controls and excellent
    visibility. The cab provides a comfortable working environment for
    all-day operation.
  • Cat Advanced Ride Management (ARM) seat suspension reduces
    end stroke movement of the load cylinder for a smoother ride.
  • Engine overspeed protection will automatically engage with no
    operator input when the machine is in eighth gear. The machine
    will assist in slowing the machine speed by canceling the throttle
    command and engaging the engine compression brake.


  • Monitor, manage, and enhance jobsite operations.
  • Hit target grade faster and more accurately with Cat GRADE technologies. Finish jobs in fewer passes and with less operator effort, saving you time and helping to increase profit.
  • Product Link™ collects machine data that can be viewed online through web and mobile applications (optional attachment).
  • Access information anytime, anywhere with Vision Link®– use it to make informed decisions that boost productivity, lower costs, simplify maintenance, and improve safety and security on your jobsite.
  • Shorten the learning curve for inexperienced operators with Load Assist (optional attachment).


  • The new tractor hydraulic on-demand fan helps assist in lower fuel consumption.
  • The Cat C13 tractor engine emits equivalent to U.S. EPA Tier 2 and EU Stage II and U.S. EPA Tier 3 and EU Stage IIIA, contributing to lower fuel .
  • Using draft-arm overflow guards diverts material away from the bowl, preventing material from getting caught between the draft arms and the bowl sides.
  • Cat Grade Control (optional attachment) intelligently ensures the machine does not cut below grade in a cut area or overfill in the fill area.

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Power Train - Tractor
    • Cat C13
    • 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
    • Throttle lock
    • Parking , hydraulic released, spring applied
    • Primary and secondary, wet disc, hydraulic
  • Transmission
    • 8-speed planetary power shift
    • APECS software
    • Transmission hold
    • Ground speed control
    • Machine speed limit
    • Programmable top gear selection
    • Differential lock
    • Standard tire spin reduction
    • Differential lock protection
    • Guard, power train
    • ECPC control
  • Electrical - Tractor
    • Alternator, 150 Amp
    • Batteries (4), 12V, 1,000 CCA, maintenance free, high output
    • Electrical system, 24V
    • Starting/charging receptacle
  • Lighting System - Tractor
    • Headlights, halogen
    • Halogen sdie vision (2)
    • Bowl (1)
    • LED Floodlights
    • Turn Signals with hazard Function
    • Cutting Edge (2)
  • Electrical - Scraper
    • Alarm, backup
  • Lighting System - Scraper
    • Brake lights, LED
    • Trun signals with hazard function, LED
  • Keypad Switches
    • Throttle lock
    • Retarding level select
    • Hazard lights
    • Wipers/washers
    • Work lights on/off
    • Information mode on Messenger Display
  • Safety Tab Rocker Switches
    • Regeneration control
    • Parking Brake
  • 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
    • 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
    • Cushion hitch
    • Secondary steering
    • Bail down
    • Park brake
    • Action lamp
    • Transmission hold
    • Engine oil temperature
    • High beam lights
    • Fuel level
    • Hydraulic oil temperature
    • Apron float
    • Differential lock (1)
    • Gear selection
    • Throttle lock
    • Ejector auto
    • System voltage
    • Brake system
    • Implement lockout
    • Regeneration required
    • Engine speed, rpm
  • 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
  • Bowl
    • 17.6 m³ (23 yd³), heaped
    • 13.5 m� (17.6 yd�), struck
  • Other Standard Equipment - Scraper
    • Vandalism locks
    • Elevator with 15 flights
    • 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
    • Product Link
    • Cat Grade Control with Load Assist
  • Work Light Attachments
    • HID work lights
  • Ambient Capability Arrangements
    • Cooling, high ambient HRC
    • Extended Life Coolant, -50� C (-58� F)
    • Cooling, high ambient LRC
    • Cooling, low ambient LRC
  • Other Attachments
    • Camera arrangement - WAVS
    • Steering lock - external
    • Cab beacon
    • Air horn
    • Air horn and beacon
    • Fender, scraper
    • Wiring group
    • Year of manufacture plate
  • Service Instructions
    • Film arrangement - U.S. (ANSI)
    • Film arrangement - International (ISO)

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