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M 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.

120M Motor Grader

The Cat® 120M Motor Grader is designed to help you get more work done in less time. Unprecedented operator comfort and ease of service help to maximize your return on investment.

Product Details

Engine

Base Power (1st gear) - Net 103.0 kW
Engine Model Cat C6.6 ACERT
Bore 105.0 mm
Stroke 127.0 mm
Speed @ Rated Power 2,000 rpm
Base Power (1st gear) - Net (Metric) 103.0 kW
Maximum Torque (VHP Plus - Net) 906.0 N·m
Torque Rise (VHP Plus) 40%
VHP Plus Range - Net 103-136 kW (138-182 hp)
VHP Plus Range - Net (Metric) 103-136 kW (140-185 hp)
Displacement 6.6 L
Number of Cylinders 6
Derating Altitude 3505.0 m
Standard - Fan Speed - Maximum 1,150 rpm
Standard - Fan Speed - Minimum 600 rpm
Standard - Ambient Capability 43.0 ° C
High Ambient - Fan Speed - Maximum 1,650 rpm
High Ambient - Fan Speed - Minimum 600 rpm
High Ambient Capability 50.0 ° C

Weights

Operating Weight - Typically Equipped 16876.0 kg
Gross Vehicle Weight - Maximum - Front Axle 6689.0 kg
Gross Vehicle Weight - Maximum - Rear Axle 13582.0 kg
Gross Vehicle Weight - Base - Front Axle 3621.0 kg
Gross Vehicle Weight - Base - Rear Axle 10872.0 kg
Gross Vehicle Weight - Maximum - Total 20271.0 kg
Gross Vehicle Weight - Base - Total 14493.0 kg
Gross Vehicle Weight - Typically Equipped - Front Axle 4524.0 kg
Gross Vehicle Weight - Typically Equipped - Rear Axle 16876.0 kg
Gross Vehicle Weight - Typically Equipped - Total 16876.0 kg

Moldboard

Blade Width 3.7 m
Moldboard - Height 610.0 mm
Moldboard - Thickness 22.0 mm
Arc Radius 413.0 mm
Throat Clearance 134.0 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 - Base GVW 9785.0 kg
Blade Pull - Maximum GVW 12223.0 kg
Down Pressure - Base GVW 6291.0 kg
Down Pressure - Maximum GVW 11622.0 kg
Moldboard - Width 3.7 m

Dimensions

Height - Top of Cab Product Link (cellular) 3378.0 mm
Length - Push Plate to Ripper 9930.0 mm
Length - Push Plate to Ripper Retracted 9612.0 mm
Height - Top of Cab 3308.0 mm
Width - Outside Front Tires 2511.0 mm
Length - Front Axle to Mid Tandem 5915.0 mm
Length - Front Tire to Rear of Machine 8436.0 mm
Length - Front Axle to Moldboard 2450.0 mm
Length - Between Tandem Axles 1511.0 mm
Width - Outside Rear Tires 2491.0 mm
Width - Tire Center Lines 2120.0 mm
Height - Front Axle Center 596.0 mm
Height to Exhaust Stack 2885.0 mm
Height to Top of Cylinders 2924.0 mm
Ground Clearance at Rear Axle 348.0 mm

Operating Specifications

Top Speed - Forward 47.5 km/h
Top Speed - Reverse 37.5 km/h
Turning Radius, Outside Front Tires 7.34 m
Steering Range - Left/Right 47.5°
Articulation Angle - Left/Right 20°
Forward - 1st 4.1 km/h
Forward - 2nd 5.6 km/h
Forward - 3rd 8.2 km/h
Forward - 4th 11.2 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 3.3 km/h
Reverse - 2nd 6.1 km/h
Reverse - 3rd 8.9 km/h
Reverse - 4th 13.8 km/h
Reverse - 5th 25.8 km/h
Reverse - 6th 37.5 km/h

Service Refill

Fuel Capacity 378.0 L
Cooling System 33.0 L
Hydraulic System - Tank 64.0 L
Engine Oil 14.0 L
Transmission/Differential/Final Drives 62.5 L
Tandem Housing (each) 59.0 L
Front Wheel Spindle Bearing Housing 0.5 L
Circle Drive Housing 7.0 L

Power Train

Forward/Reverse Gears 8 Forward/6 Reverse
Transmission Direct drive, power shift, countershaft
Brakes - Service Multiple oil disc
Brakes - Service, Surface Area 23000.0 cm2
Brakes - Parking Multiple oil disc
Brakes - Secondary Dual circuit control system

Hydraulic System

Circuit Type Electro-hydraulic load sensing, closed center
Pump Type Variable piston
Pump Output 210.0 L/min
Maximum System Pressure 24100.0 kPa
Standby Pressure 3100.0 kPa

Frame

Drawbar - Width 76.2 mm
Circle - Diameter 1530.0 mm
Circle - Blade Beam Thickness 35.0 mm
Drawbar - Height 152.0 mm
Circle - Height 134.5 mm
Front Frame Structure - Height 280.0 mm
Front Frame Structure - Thickness 22.0 mm
Front Frame Structure - Width 255.0 mm
Front Axle - Height to Center 596.0 mm
Front Axle - Wheel Lean, Left/Right 18°
Front Axle - Total Oscillation per Side 32°

Blade Range

Circle Centershift - Right 656.0 mm
Circle Centershift - Left 656.0 mm
Moldboard Sideshift - Right 660.0 mm
Moldboard Sideshift - Left 510.0 mm
Maximum Blade Position Angle 90°
Blade Tip Range - Forward 40°
Blade Tip Range - Backward
Maximum Shoulder Reach Outside of Tires - Right 1905.0 mm
Maximum Shoulder Reach Outside of Tires - Left 1742.0 mm
Maximum Lift above Ground 427.0 mm
Maximum Depth of Cut 720.0 mm

Net Power: VHP Plus - Net

Gear: Forward - 1st 103.0 kW
Gear: Forward - 2nd 106.0 kW
Gear: Forward - 3rd 110.0 kW
Gear: Forward - 4th 114.0 kW
Gear: Forward - 5th 118.0 kW
Gear: Forward - 6th 121.0 kW
Gear: Forward - 7th 125.0 kW
Gear: Forward - 8th 136.0 kW
Gear: Reverse - 1st 103.0 kW
Gear: Reverse - 2nd 106.0 kW
Gear: Reverse - 3rd-6th 110.0 kW

Standards

Brakes ISO 3450:1996
ROPS/FOPS ISO 3471:1994/ISO 3449:1992
Sound ISO 6394:2008/ISO 6395:2008
Steering ISO 5010:2007

Scarifier

Front, V-Type, 5 or 11 Tooth - Scarifier Shank Holder Spacing 116.0 mm
Front, V-Type, 5 or 11 Tooth - Scarifier Shank Holders 5/11
Front, V-Type, 5 or 11 Tooth - Scarifying Depth, Maximum 467.0 mm
Front, V-Type, 5 or 11 Tooth - Working Width 1205.0 mm
Mid, Straight - Scarifier Shank Holder Spacing 111.0 mm
Mid, Straight - Scarifier Shank Holders 17
Mid, Straight - Scarifying Depth, Maximum 317.0 mm
Mid, Straight - Working Width 1800.0 mm
Mid, V-Type - Scarifier Shank Holder Spacing 116.0 mm
Mid, V-Type - Scarifier Shank Holders 11
Mid, V-Type - Scarifying Depth, Maximum 292.0 mm
Mid, V-Type - Working Width 1184.0 mm

Ripper

Ripper Shank Holder Spacing 533.0 mm
Ripping Depth - Maximum 428.0 mm
Ripper Shank Holders 5
Penetration Force 8031.0 kg
Pryout Force 11931.0 kg
Machine Length Increase, Beam Raised 995.0 mm

Tandems

Height 502.0 mm
Width 171.7 mm
Sidewall Thickness - Inner 14.0 mm
Sidewall Thickness - Outer 16.0 mm
Drive Chain Pitch 44.5 mm
Wheel Axle Spacing 1510.0 mm
Tandem Oscillation - Front Up 15°
Tandem Oscillation - Front Down 25°
Catepillar Equipments