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  • 140K - K Series Motor Graders
  • 140K - K Series Motor Graders
  • 140K - K Series Motor Graders
  • 140K - K Series Motor Graders
  • 140K - K Series Motor Graders
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The K Series Motor Grader is the machine you can count on when you need to get work done. Cat motor graders help you make the most of your investment by delivering maximum productivity and durability. The Cat C7 engine, direct-drive power shift transmission and load sensing hydraulics work together to ensure the power and precision you need to work in demanding conditions. And Cat motor graders are backed by the world-class Cat dealer network to keep you up and running.

Base Power
128 kW
VHP Range
128-143 kW (171-191 hp)
Blade Width
3.7 m
Operating Weight
15108 kg
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Reliable performance

Smooth Shifting Transmission

Full Electronic Clutch Pressure Control ensures smooth shifting and directional changes. Shift Torque Management helps to smooth gear changes without the use of the inching pedal, helping the operator to remain focused on the task at hand. Load Compensation ensures consistent shift quality regardless of blade or machine load. Optional Autoshift automatically shifts the transmission at optimal points for easier operation.

Oil Disc Brakes - Completely Sealed, Adjustment Free

Oil-bathed, air actuated and spring-released, located at each tandem wheel to eliminate power train braking loads and to reduce service time. The large brake surface area provides dependable braking capability and extended life before rebuild.

Front Axle with Cat Live Spindle Design

Cat sealed spindle keeps the bearings free from contaminants and lubricated in a lightweight oil to reduce owning and operating costs. A larger tapered roller bearing is outboard where the load is greater, extending bearing life.

Maximum power and efficiency

Power Management

The Cat C7 engine with ACERT Technology uses electronic control, precision fuel delivery and refined air management to provide outstanding performance and lower emissions. Variable Horse Power (VHP) is standard to provide more power in the higher gears. The Electronic Throttle Control provides easier, more precise and consistent throttle operation. Engine Over-Speed Protection prevents downshifting until an acceptable safe travel speed has been established.

Balanced hydraulics deliver consistent, precise and responsive control

Balanced Flow, Independent Oil Supply

Hydraulic flow is proportioned to ensure all implements operate simultaneously. Independent oil supply prevents cross-contamination and provides proper oil cooling, which means less heat build-up and extended component life.

Implement Control Valves

Provide outstanding operator “feel” and predictable system response for unmatched implement control. To help maintain exact blade settings, lock valves are built into all control valves. Line relief valves are also incorporated into selected control valves to protect the cylinders from over pressurization.

Load-Sensing Hydraulics

A load sensing variable displacement pump and advanced hydraulic valves provide superior implement control and better machine performance. Continuously matching hydraulic flow and pressure to power demands creates less heat and reduces power consumption.

Consistent and Predictable Movement

The hydraulic system valves are specifically designed for each hydraulic function on the motor grader. They compensate for differences in flow requirements, based on cylinder size and the difference in surface volume between the rod end (blue) and barrel end (red) of the cylinder. The result is predictable, consistent hydraulic speeds whether extending or retracting the cylinder.

Designed for strength and durability

Frame Structure - Provides Consistency and Strength

Front frame is a continuous top and bottom plate construction. Flanged box section design removes welds from high stress areas, improving reliability and durability. The rear frame structure has two box section channels with fully welded differential case for a solid working platform. An integrated bumper ties the rear frame together into a cohesive unit to handle high stress loads.

Drawbar, Circle and Moldboard

The K Series drawbar is designed for high strength and optimum durability for any application. The circle stands up to high stress loads. Raised wear surfaces prevent circle teeth wear against the drawbar. The 64 uniformly spaced circle teeth are flame cut and heat induction hardened to resist wear, and the circle is secured to the drawbar by six support shoes for maximum support. The moldboard provides optimal curvature and large throat clearance that helps move all soil types quickly and efficiently. These features deliver excellent load distribution and minimal material buildup in the circle area while allowing large blade loads to roll freely.

Blade Lift Accumulators

This optional feature uses accumulators to help absorb impact loads to the moldboard by allowing vertical blade travel. Blade lift accumulators reduce unnecessary wear and help to avoid unintended machine movement for increased operator safety.

Allows expansion of machine versatility, utilization, and performance

Moldboard Options

Standard moldboard length is 3.7 m (12 ft), with an optional 4.3 m (14 ft) moldboard available from the factory. Moldboard extensions are available to increase moldboard surface area and extend reach capability.

Ground Engaging Tools

A wide variety of cutting edges and end bits are available, all designed for maximum service life and productivity.

Rear Ripper/Scarifier

The K Series optional ripper/scarifier is made to penetrate tough material fast and rip thoroughly for easier material movement with the moldboard. The ripper includes three shanks with the ability to add two more if needed. Nine scarifier shanks can also be added for additional versatility.

Front Mounted Groups

A front mounted push plate/counterweight or front blade can be ordered.

Mid-Mount Scarifier

Positioned between the front axle and the circle to break up tough material that the blade can then move, all in a single pass. The V-type scarifier can accommodate up to 11 teeth.

Snow Removal Work Tools

Includes snow wings, angle blades, and V-plows. Multiple mounting options are available, increasing machine versatility. (Availability may differ by region.)

Caterpillar sets the standard for comfort, convenience and visibility

Designed for Productivity

K Series cabs are designed to keep operators comfortable, relaxed and productive. Features like low effort pedals and controls, adjustable implement controls and adjustable steering wheel angle help make work easier on the operator. A clear view to the moldboard heel and tandem tires enhance productivity and safe operation. Rocker switches and transmission shifter are backlit for night time operation.

In-dash Instrument Cluster

The instrument panel, with easy-to read, high-visibility gauges and warning lamps, places vital machine information and diagnostic capability in easy view of the operator. The dash includes an engine coolant temperature gauge, an articulation gauge, voltage gauge and fuel level gauge. Service brake air pressure gauges are also standard. Speedometer and tachometer are optional. All major systems are monitored by warning lights.

Additional Cab Features

Additional cab features include storage area, an adjustable control console and coat hook. Optional offerings include power port, air conditioner/heater, suspension seat, defroster fan, sun shade, backup lights, Product Link™ ready, and AccuGrade™ System ready. NOTE: Some attachments are not available in all regions.

Solutions to make work easier and more efficient

Cat AccuGrade

AccuGrade uses positioning and guidance technologies, machine sensors, and automatic blade control to help operators get to grade faster, easier and more efficiently. Digital design plans, real-time cut/fill data, and in-cab guidance give operators detailed information to work more confidently and achieve greater accuracy, in fewer passes, using less material. Operators can stay on grade and improve productivity and accuracy by nearly 50 percent over conventional methods. Grade stakes and checkers are minimized, making the work site safe, efficient, and cost effective. AccuGrade technologies include Cross Slope, Sonic, Laser, GPS, and/or Universal Total Station (UTS).

AccuGrade Attachment Ready Option (ARO)

K Series machines can be equipped with the AccuGrade ARO. It can be ordered as a factory or dealer installed option. The attachment option includes built-in mounting points and internal wiring, making installation of the AccuGrade grade control system faster and easier.

Cat Product Link

Product Link helps take the guesswork out of equipment management with remote monitoring capabilities for your machine or your entire fleet. Track asset location, hours, fuel usage, diagnostic codes, idle time and more through the secure VisionLink™ user interface. Knowing where your equipment is, what it’s doing and how it’s performing enables you or your Cat dealer to manage your fleet in real-time so you can maximize efficiency, improve productivity, and lower operating costs.

Designed with safety in mind

ROPS/FOPS Cab Offers Low Sound and Vibration Levels

The operator sound pressure level for the cab offered by Caterpillar, when properly installed, maintained and tested with the doors closed, meets or exceeds requirements set forth in ISO 6394:2008. The quiet environment helps improve operator working conditions.

Brake Systems and Machine Protection

Brakes located at each tandem wheel offer the largest total brake surface area in the industry, delivering dependable stopping power and longer brake life. Standard circle drive slip clutch protects the drawbar, circle and moldboard from shock loads when the blade encounters an immovable object. Blade lift accumulators help absorb impact loads to the moldboard by allowing vertical blade travel.

Electrical Disconnect Switch and Engine Shutoff Switch

Disconnect switch provides ground-level lockout of the electrical system to prevent inadvertent machine starts. Engine shutoff allows anyone nearby to shut the machine down in case of an emergency.

Additional Safety Features

Laminated glass on the front windows and lockable doors to reduce theft and vandalism are available with the optional cab. Brake lights, conveniently located grab rails, back up lights and alarm also help ensure a safe work environment.

When uptime counts

Renowned Cat Dealer Support

From helping you choose the right machine to financing and ongoing support, your Cat dealer provides the best in sales and service. Manage your costs with preventive maintenance programs like S•O•SSM fluids analysis, coolant sampling and guaranteed maintenance contracts. Stay productive with best-in-class parts availability. Your Cat dealer can help you boost your profits with operator training. And when it’s time for component replacement, your Cat dealer can help you save even more. Genuine Cat Remanufactured parts carry the same warranty and reliability as new products at savings of 40 to 70 percent for power train and hydraulic components.

Thinking generations ahead

Integrated machine systems and technologies improve productivity for greater accuracy, lower fuel use and reduced machine wear. Replaceable wear parts save maintenance time and cost, and extend major component life. Ecology drains help make draining fluids more convenient and help prevent spills. Major components are built to be rebuilt, eliminating waste and saving customers money by giving the machine and/or major components a second - and even third life. A variety of safety features help safeguard operators and others on the job site.


Standard Equipment
Base Power (1st Gear) - Net 128 kW
Engine Model Cat® C7 ACERT™
VHP - Gears 1-2, Net 128 kW
VHP - Gear 3, Net 135 kW
VHP - Gears 4-8, Net 143 kW
VHP - Gears 1-2, Gross 140 kW
VHP - Gear 3, Gross 147 kW
VHP - Gears 4-8, Gross 155 kW
Displacement 7.2 l
Bore 105 mm
Stroke 127 mm
Speed at Rated Power 2000 r/min
Number of Cylinders 6
Derating Altitude 3048 m
High - Ambient Capability 50 °C
VHP Range - Net 128-143 kW (171-191 hp)
Base Power (1st Gear) - Net - Metric 128 kW
Fan Speed Maximum 1925 r/min
Maximum Torque - Net 996 N·m
Torque Rise 46 %
Standard Equipment
Forward/Reverse Gears 8 forward/6 reverse
Transmission Direct drive, Power shift
Brakes - Service Air actuated, multiple oil-disc
Brakes - Service - Surface Area 23948 cm²
Brakes - Parking Air actuated, multiple oil-disc
Brakes - Secondary Dual circuit
Standard Equipment
Top Speed - Forward 47.3 km/h
Top Speed - Reverse 37.4 km/h
Turning Radius - Outside Front Tires 7.5 m
Steering Range - Left/Right 47.5 °
Articulation Angle - Left/Right 20 °
Forward - 1st 4.1 km/h
Forward - 2nd 5.5 km/h
Forward - 3rd 8 km/h
Forward - 4th 11 km/h
Forward - 5th 17.4 km/h
Forward - 6th 23.6 km/h
Forward - 7th 32.5 km/h
Forward - 8th 47.3 km/h
Reverse - 1st 3.2 km/h
Reverse - 2nd 6 km/h
Reverse - 3rd 8.7 km/h
Reverse - 4th 13.7 km/h
Reverse - 5th 25.7 km/h
Reverse - 6th 37.4 km/h
Standard Equipment
Circuit Type Load Sensing, Closed Center, Proportional Priority Pressure Compensating System
Pump Type Variable Piston
Maximum System Pressure 25500 kPa
Standby Pressure 3600 kPa
Reservoir Tank Capacity 55 l
Optional High Output Pump 210.5 l/min
Pump Output - Standard Pump 159.1 l/min
Standard Equipment
Blade Width 3.7 m
Moldboard - Height 610 mm
Moldboard - Thickness 22 mm
Arc Radius 413 mm
Throat Clearance 120 mm
Cutting Edge Width 152 mm
Cutting Edge Thickness 16 mm
End Bit - Width 152 mm
End Bit - Thickness 16 mm
Blade Pull - Maximum GVW 13379 kg
Down Pressure - Maximum GVW 13963 kg
Blade Pull - Base GVW 9108 kg
Down Pressure - Base GVW 7278 kg
Standard Equipment
Circle Centershift - Right 728 mm
Circle Centershift - Left 752 mm
Moldboard Sideshift - Right 663 mm
Moldboard Sideshift - Left 512 mm
Maximum Blade Position Angle 90 °
Blade Tip Range - Forward 40 °
Blade Tip Range - Backward 5 °
Maximum Lift Above Ground 480 mm
Maximum Digging Depth 735 mm
Maximum Shoulder Reach Outside of Tires - Left 1896 mm
Maximum Shoulder Reach Outside of Tires - Right 1978 mm
Standard Equipment
Ripping Depth - Maximum 462 mm
Ripper Shank Holders, Quantity 5
Ripper Shank Holder Spacing 533 mm
Penetration Force 8694 kg
Pry-Out Force 11673 kg
Machine Length Increase, Beam Raised 970 mm
Scarifier Shank Holder Quantity 9
Standard Equipment
Mid, V-Type - Working Width 1184 mm
Mid, V-Type - Scarifying Depth, Maximum 229 mm
Mid, V-Type - Scarifier Shank Holders Quantity 11
Mid, V-Type - Scarifier Shank Holder Spacing 116 mm
Rear - Working Width 2300 mm
Rear - Scarifying Depth, Maximum 266 mm
Rear - Scarifier Shank Holders Quantity 9
Rear - Scarifier Shank Holder Spacing 267 mm
Standard Equipment
Front Axle - Total Oscillation 32 °
Front-Section Modulus - Maximum 4785 cm³
Front-Section Modulus - Minimum 2083 cm³
Circle - Diameter 1530 mm
Circle - Blade Beam Thickness 35 mm
Drawbar - Height 127 mm
Drawbar - Width 76.2 mm
Front Axle - Height to Center 628 mm
Front Axle - Wheel Lean - Left/Right 18 °
Front-Top/Bottom Plate - Width 305 mm
Front-Top/Bottom Plate - Thickness 25 mm
Front-Side Plates - Width 242 mm
Front-Side Plates - Thickness 12 mm
Front-Linear Weights - Minimum 165 kg/m
Front-Linear Weights - Maximum 213 kg/m
Standard Equipment
Height 506 mm
Width 201 mm
Sidewall Thickness - Inner 16 mm
Sidewall Thickness - Outer 18 mm
Drive Chain Pitch 51 mm
Wheel Axle Spacing 1522 mm
Tandem Oscillation - Front Up 15 °
Tandem Oscillation - Front Down 25 °
Standard Equipment
Fuel Capacity 305 l
Cooling System 40 l
Engine Oil 18 l
Transmission - Differential - Final Drives 60 l
Tandem Housing - Each 64 l
Front Wheel Spindle Bearing Housing 0.5 l
Circle Drive Housing 7 l
Standard Equipment
Gross Vehicle Weight - Typically Equipped 17510 kg
Gross Vehicle Weight - Base - Total 14292 kg
Gross Vehicle Weight - Maximum - Total 22870 kg
Gross Vehicle Weight - Typically Equipped - Front Axle 5053 kg
Gross Vehicle Weight - Typically Equipped - Rear Axle 12457 kg
Gross Vehicle Weight - Typically Equipped - Total 17510 kg
Gross Vehicle Weight - Base - Front Axle 4172 kg
Gross Vehicle Weight - Base - Rear Axle 10120 kg
Gross Vehicle Weight - Maximum - Front Axle 8005 kg
Gross Vehicle Weight - Maximum - Rear Axle 14866 kg
Standard Equipment
Height - ROPS Cab 3354 mm
Height - Non-ROPS Cab 3348 mm
Height - ROPS/Canopy 3354 mm
Ground Clearance - Center Front Axle 626 mm
Length - Between Tandem Axles 1523 mm
Length - Front Axle to Moldboard 2598 mm
Length - Front Axle to Mid Tandem 6086 mm
Length - Front Tire to Rear of Machine 8504 mm
Length - Counterweight to Ripper 10013 mm
Ground Clearance - Trans. Case 362 mm
Height - Top of Cylinders 3049 mm
Height - Exhaust Stack 2895 mm
Width - Tire Center Lines 2065 mm
Width - Outside Rear Tires 2452 mm
Width - Outside Front Tires 2481 mm
Standard Equipment
ROPS/FOPS ISO 3471:1994/ISO 3449:2005
Steering ISO 5010:2007
Brakes ISO 3450:1996
Sound ISO 6394:2008/ISO 6396:2008
Standard Equipment
Gross Vehicle Weight 17510 kg
Operating Weight - Typically Equipped 15108 kg
Standard Equipment
Gross Vehicle Weight 22870 kg