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K Series Motor Graders

Cat motor graders continue their reputation for offering world-class cab and controls, advanced electronics and hydraulics, and optimum productivity... to match your needs in any application.

120K Motor Grader

The Cat® 120K 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 ACERT™ engine, direct-drive power shift transmission and load sensing hydraulics work together ensuring you have the power and precision you need when you need it.

  • Specification Summary

  • Base Power (1st gear) – Net93 kW
  • Engine ModelCat C7 ACERT
  • VHP – gears 1-2 NetNet power is tested per ISO 9249, SAE J1349, and EEC 80/1269 standards in effect at the time of manufacture. kW
  • VHP – gear 3 NetNet power advertised is the power available at rated speed of 2,000 rpm, measured at the flywheel when engine is equipped with f kW
  • Displacement7.2 L
  • Product Brochure

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Product Details

Engine

Base Power (1st gear) – Net 93 kW
Engine Model Cat C7 ACERT
VHP – gears 1-2 Net Net power is tested per ISO 9249, SAE J1349, and EEC 80/1269 standards in effect at the time of manufacture.
VHP – gear 3 Net Net power advertised is the power available at rated speed of 2,000 rpm, measured at the flywheel when engine is equipped with f
Displacement 7.2 L
Bore 105 mm
Stroke 127 mm
Speed @ rated power 2000 RPM
Number of cylinders Maximum torque measured at 1,000 rpm in gears 4-8.
Derating altitude 3048 m
High Ambient Capability 50 ° C
VHP Range – Net 108-118 kW (145-158 hp)
Base Power (1st gear) – Net (Metric) 93 kW
Fan Speed Maximum 1575 RPM
Maximum Torque Net 774 N·m
Torque Rise 50%

Weights

Gross Vehicle Weight – Typically Equipped 14340 kg
Gross Vehicle Weight: Base – total 12743 kg
Gross Vehicle Weight: Maximum – total 3274 kg
Gross Vehicle Weight: Typically Equipped – front axle 9469 kg
Gross Vehicle Weight: Typically Equipped – rear axle 14340 kg
Gross Vehicle Weight: Typically Equipped – total 4203 kg
Gross Vehicle Weight: Base – front axle 10137 kg
Gross Vehicle Weight: Base – rear axle 17000 kg
Gross Vehicle Weight: Maximum – front axle 5197 kg
Gross Vehicle Weight: Maximum – rear axle 11803 kg

Moldboard

Blade Width 3.7 m
Moldboard – height 610 mm
Moldboard – thickness 22 mm
Arc Radius 413 mm
Throat Clearance 58 mm
Cutting Edge – width 152 mm
Cutting Edge – thickness 16 mm
End Bit – width 152 mm
End Bit – thickness 16 mm

Weights – Typically Equipped

Operating Weight – Typically Equipped Base weight calculated on standard machine configuration with 13.00-24 12PR (G-2) tires, SP Rims, full fuel tank, coolant, lubri
Gross Vehicle Weight Typical operating weight calculated on standard machine configuration with HVAC ROPS Cab, 13.00-24 12PR (G-2) tires, MP Rims, MM

Blade Range

Circle Centershift – right 656 mm
Circle Centershift – left 658 mm
Moldboard Sideshift – right 663 mm
Moldboard Sideshift – left 512 mm
Blade Tip Range – forward 40°
Blade Tip Range – backward
Maximum shoulder reach outside of tires – right 1928 mm
Maximum shoulder reach outside of tires – left 1764 mm
Maximum lift above ground 410 mm
Maximum depth of cut 775 mm

Frame

Circle – diameter 1530 mm
Circle – blade beam thickness 30 mm
Front axle – wheel lean, left/right 18°
Front axle – total oscillation per side 32°

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