Wheel Tractor-Scraper K Series Wheel Tractor-Scraper K Series
Wheel Tractor-Scraper K-Series Operator Testimonial Wheel Tractor-Scraper K-Series Operator Testimonial
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Flywheel Power - Tractor/Scraper304 kW (407 hp)
Scraper Capacity - Heaped24 yd³ (18.4 m³)
Top Speed - Loaded33.5 mile/h (53.9 km/h)
Width - Overall Machine141.1 in (3585 mm)
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/Scraper304 kW (407 hp)
Scraper Capacity - Heaped24 yd³ (18.4 m³)
Top Speed - Loaded33.5 mile/h (53.9 km/h)
Width - Overall Machine141.1 in (3585 mm)
Width - Tractor133.1 in (3381 mm)
Width - Inside of Bowl120 in (3048 mm)
Width - Outside Rear Tires128.9 in (3275 mm)
Height - Overall Shipping158.6 in (4029 mm)
Height - Top of Cab142.2 in (3612 mm)
Ground Clearance - Tractor21.9 in (557 mm)
Front of Tractor to Front Axle122.8 in (3119 mm)
Axle to Vertical Hitch Pin21.3 in (540 mm)
Height - Scraper Blade Maximum20.5 in (520 mm)
Wheel Base314.9 in (7998 mm)
Rear Axle - Rear of Machine114.1 in (2898 mm)
Reverse AlarmISO 9533:2010
BrakesISO 3450:1996
Exterior Sound LevelThe exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
ROPS/FOPSMeets SAE and ISO standards
Overall Length - With Bail Down51.1 ft (15.58 m)
Seat BeltSAE J386:JUN1985
Steering SystemISO 5010:2007
Falling Object Protective Structure (FOPS)ISO 3449:2005 Level II
Rollover Protection Structure (ROPS)ISO 3471:2008 for up to 17 084 kg (37,664 lb)
Transmission Gear - Seventh24.8 mile/h (39.9 km/h)
Bowl Raise3 s (3 s)
Ejector Retract6.7 s (6.7 s)
Ejector Extend5.2 s (5.2 s)
Apron Raise2.95 s (2.95 s)
Apron Lower3.8 s (3.8 s)
Bail Raise1.8 s (1.8 s)
Bail Lower3.2 s (3.2 s)
Transmission Gear - Fourth10.1 mile/h (16.3 km/h)
Operating Weight - Empty79787 lb (36185 kg)
Transmission Gear - Eighth33.5 mile/h (53.9 km/h)
Transmission Gear - First3.1 mile/h (5 km/h)
Transmission Gear - Third7.5 mile/h (12.1 km/h)
Transmission Gear - Second5.5 mile/h (8.9 km/h)
Transmission Gear - Reverse5.7 mile/h (9.2 km/h)
Transmission Gear - Fifth13.6 mile/h (21.9 km/h)
Transmission Gear - Sixth18.4 mile/h (29.6 km/h)
Operating Weight - Empty80630 lb (36567 kg)
Maximum Depth of Cut12.4 in (315 mm)
Overall Length45.9 ft (14.02 m)
Rated Engine RPM - Tractor2000 r/min (2000 r/min)
180° Curb-to-Curb Turning Width38.71 ft (11.8 m)
Scraper Capacity - Struck17.1 yd³ (13 m³)
Tires - Scraper33.25R29**E3
Overall Width11.71 ft (3.57 m)
Overall Shipping Height13.22 ft (4.03 m)
Width - Cut10.3 ft (3.14 m)
Tires - Tractor Drive33.25R29**E3
Top Speed - Loaded33.5 mile/h (53.9 km/h)
Fuel Tank Refill Capacity - Scraper201 gal (US) (763 l)
Scraper Capacity - Heaped24 yd³ (18.4 m³)
Rated Load26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Engine Model - TractorCat C13
Width - Overall Machine - Ladder Down149.2 in (3790 mm)
Flywheel Power - Tractor407 HP (304 kW)
NoteCat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Hydraulic System21.926 gal (US) (83 l)
Cooling System11.89 gal (US) (45 l)
Fuel Tank216.09 gal (US) (818 l)
Crankcase8.08 gal (US) (30.58 l)
Diesel Exhaust Fluid8.057 gal (US) (30.5 l)
Transmission System24.76 gal (US) (93 l)
Maximum Depth of Spread21.3 in (540 mm)
Length - Maximum (Push-Pull)613.2 in (15576 mm)
Length - Overall Machine - Standard551.8 in (14015 mm)
Width - Rear Tire Centers90.2 in (2290 mm)
Bowl Lower3.5 s (3.5 s)

Benefits and Features

  • Machine Speed Limit 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 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.

  • The interior of the K Series cabs has improved the operator comfort and visibility by redesigning the dash area and key pad placement.
  • Advanced Cushion Hitch prevents 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.
  • 621K 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.

  • Differential Lock Engagement Protection feature allows the machine to prevent the operator from engaging the differential lock when damage could occur.
  • 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.
  • 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.

  • 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.
  • 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.

Standard Equipment

  • 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
  • Braking system: - Primary and secondary, wet disc, hydraulic
  • 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
  • Alarm, backup
  • Lighting system: - Brake lights, LED - Turn signals with hazard function, LED
  • 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
  • Extended Life Coolant to -37° C (-34° F)
  • 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: - 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

  • Secondary Steering Arrangement
  • Sequence Assist Arrangement
  • Load Assist
  • Cat Grade Control with Load Assist
  • Camera arrangement - WAVS
  • Steering lock - external
  • Cab beacon
  • Air horn
  • Air horn and beacon
  • Fender, scraper
  • Guard, overflow
  • Wiring group
  • Year of manufacture plate
  • Cooling, high ambient HRC
  • Cooling, low ambient HRC
  • Cooling, high ambient LRC
  • Cooling, low ambient LRC
  • Film arrangement - U.S. (ANSI)
  • Film arrangement - International (ISO)