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120K


  • 120K - K Series Motor Graders
  • 120K - K Series Motor Graders
  • 120K - K Series Motor Graders
  • 120K - K Series Motor Graders
  • 120K - K Series Motor Graders

120K

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
93.0 kW
VHP Range
93-108 kW (125-145 hp)
Blade Width
3.7 m
Operating Weight
30519.0 kg

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FEATURES & BENEFITS

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 four 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). 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.

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.

SPECIFICATION

Standard Equipment
Base Power (1st gear) - Net 93.0 kW
Engine Model Cat® C7 ACERT™
VHP - gears 1-2 Net 93.0 kW
VHP - gear 3 Net 101.0 kW
VHP - gears 4-8 Net 108.0 kW
VHP - gears 1-2 Gross 103.0 kW
VHP - gear 3 Gross 110.0 kW
VHP - gears 4-8 Gross 118.0 kW
Displacement 7.2 L
Bore 105.0 mm
Stroke 127.0 mm
Speed @ rated power 2000.0 RPM
Number of cylinders 6
Derating altitude 3048.0 m
High Ambient Capability 50.0 ° C
VHP Range - Net 93-108 kW (125-145 hp)
Base Power (1st gear) - Net (Metric) 93.0 kW
Fan Speed Maximum 1575.0 RPM
Maximum Torque Net 774.0 N·m
Torque Rise 50.0 %
Standard Equipment
Gross Vehicle Weight - Typically Equipped 13843.0 kg
Gross Vehicle Weight: Base - total 12133.0 kg
Gross Vehicle Weight: Maximum - total 17000.0 kg
Gross Vehicle Weight: Typically Equipped - front axle 3970.0 kg
Gross Vehicle Weight: Typically Equipped - rear axle 9873.0 kg
Gross Vehicle Weight: Typically Equipped - total 13843.0 kg
Gross Vehicle Weight: Base - front axle 3120.0 kg
Gross Vehicle Weight: Base - rear axle 9013.0 kg
Gross Vehicle Weight: Maximum - front axle 5197.0 kg
Gross Vehicle Weight: Maximum - rear axle 11803.0 kg
Standard Equipment
Blade Width 3.7 m
Moldboard - height 610.0 mm
Moldboard - thickness 22.0 mm
Arc Radius 413.0 mm
Throat Clearance 58.0 mm
Cutting Edge - width 152.0 mm
Cutting Edge - thickness 16.0 mm
End Bit - width 152.0 mm
End Bit - thickness 16.0 mm
Blade Pull - maximum GVW 10623.0 kg
Down Pressure - maximum GVW 9317.0 kg
Blade Pull - base GVW 8112.0 kg
Down Pressure - base GVW 5594.0 kg
Standard Equipment
Operating Weight - Typically Equipped 30519.0 kg
Gross Vehicle Weight 13843.0 kg
Standard Equipment
Forward/Reverse Gears 8 forward/6 reverse
Transmission Direct drive, Powershift
Brakes - Service Air actuated, multiple oil-disc
Brakes - Service, surface area 18606.0 cm2
Brakes - Parking Air actuated, multiple oil-disc
Brakes - Secondary Dual Circuit
Standard Equipment
Top Speed - forward 47.5 km/h
Top Speed - reverse 37.5 km/h
Turning Radius, outside front tires 7.3 m
Steering Range - left/right 47.5 Degrees
Articulation Angle - left/right 20.0 Degrees
Forward - 1st 4.1 km/h
Forward - 2nd 5.5 km/h
Forward - 3rd 8.0 km/h
Forward - 4th 11.1 km/h
Forward - 5th 17.5 km/h
Forward - 6th 23.7 km/h
Forward - 7th 32.7 km/h
Forward - 8th 47.5 km/h
Reverse - 1st 3.2 km/h
Reverse - 2nd 6.0 km/h
Reverse - 3rd 8.7 km/h
Reverse - 4th 13.8 km/h
Reverse - 5th 25.8 km/h
Reverse - 6th 37.5 km/h
Standard Equipment
Circuit Type Load Sensing, Closed Center, PPPC
Pump Type Variable Piston
Maximum System Pressure 25500.0 kPa
Standby Pressure 3600.0 kPa
Reservoir Tank Capacity 24.5 L
Optional High Output Pump 210.5 L/min
Pump Output Standard Pump 159.1 L/min
Standard Equipment
Circle Centershift - right 656.0 mm
Circle Centershift - left 658.0 mm
Moldboard Sideshift - right 663.0 mm
Moldboard Sideshift - left 512.0 mm
Maximum Blade Position Angle 90.0 Degrees
Blade Tip Range - forward 40.0 Degrees
Blade Tip Range - backward 5.0 Degrees
Maximum shoulder reach outside of tires - right 1928.0 mm
Maximum shoulder reach outside of tires - left 1764.0 mm
Maximum lift above ground 410.0 mm
Maximum depth of cut 775.0 mm
Standard Equipment
Ripping depth - maximum 262.0 mm
Ripper shank holders, quantity 5
Ripper shank holder spacing 533.0 mm
Penetration force 4083.0 kg
Pryout force 2108.0 kg
Machine length increase, beam raised 1058.0 mm
Standard Equipment
Mid, V-Type: Working width 1184.0 mm
Mid, V-Type: Scarifying depth, maximum 229.0 mm
Mid, V-Type: Scarifier shank holders quantity 11
Mid, V-Type: Scarifier shank holder spacing 116.0 mm
Standard Equipment
Gross Vehicle Weight 17000.0 kg
Standard Equipment
Front-section modulus - maximum 3681.0 cm3
Front-section modulus - minimum 1619.0 cm3
Circle - diameter 1530.0 mm
Circle - blade beam thickness 30.0 mm
Drawbar - height 127.0 mm
Drawbar - width 76.2 mm
Front axle - height to center 615.0 mm
Front axle - wheel lean, left/right 18.0 Degrees
Front axle - total oscillation per side 32.0 Degrees
Front-top/bottom plate - width 280.0 mm
Front-top/bottom plate - thickness 22.0 mm
Front-side plates - width 236.0 mm
Front-side plates - thickness 10.0 mm
Front-linear weights - minimum 134.0 kg/m
Front-linear weights - maximum 172.0 kg/m
Standard Equipment
Height 438.0 mm
Width 172.0 mm
Sidewall thickness - inner 1.0 mm
Sidewall thickness - outer 16.0 mm
Drive chain pitch 44.5 mm
Wheel axle spacing 1510.0 mm
Tandem oscillation - front up 15.0 Degrees
Tandem oscillation - front down 25.0 Degrees
Standard Equipment
Fuel Capacity 305.0 L
Cooling system 40.0 L
Engine Oil 18.0 L
Transmission/Differential/Final Drives 48.0 L
Tandem housing (each) 49.0 L
Front wheel spindle bearing housing 0.5 L
Circle drive housing 7.0 L
Standard Equipment
Height - ROPS Cab 3326.0 mm
Height - Non-ROPS Cab 3321.0 mm
Height - ROPS Canopy 3326.0 mm
Ground Clearance - Center Front Axle 602.0 mm
Length - Between Tandem Axles 1510.0 mm
Length - Front Axle to Moldboard 2598.0 mm
Length - Front Axle to Mid Tandem 5870.0 mm
Length - Front Tire to Rear of Machine 8265.0 mm
Length - Counterweight to Ripper 9769.0 mm
Ground Clearance, Trans. Case 341.0 mm
Height - Top of Cylinders 2885.0 mm
Height to Exhaust Stack 2865.0 mm
Width - Tire Center Lines 2056.0 mm
Width - Outside Rear Tires 2439.0 mm
Width - Outside Front Tires 2449.0 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