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Caterpillar 120M Motor Grader

Blades

Blade Tip Range - Backward5 °
Blade Tip Range - Forward40 °
Circle Centershift - Left25.8 in (66 cm)
Circle Centershift - Right25.8 in (66 cm)
Maximum Blade Position Angle90 °
Maximum Depth of Cut28.3 in (72 cm)
Maximum Lift Above Ground16.8 in (43 cm)
Maximum Shoulder Reach Outside of Tires - Left68.6 in (174 cm)
Maximum Shoulder Reach Outside of Tires - Right75 in (191 cm)
Moldboard Sideshift - Left20.1 in (51 cm)
Moldboard Sideshift - Right26 in (66 cm)

Circle

Blade Tip Angle - Front40 °
Blade Tip Angle - Rear5 °
Diameter60.2 in (153 cm)
Max Lift Above Ground16.8 in (43 cm)
Max Reach Outside Tires - Left68.6 in (174 cm)
Max Reach Outside Tires - Right75 in (191 cm)
Shift Left25.8 in (66 cm)
Shift Right25.8 in (66 cm)

Dimensions

Blade Base8.3 ft (3 m)
Front Ground Clearance1.9 ft (1 m)
Ground Clearance - Rear Axle13.6 in (35 cm)
Height - Exhaust Stack112.4 in (286 cm)
Height - Front Axle Center22.5 in (57 cm)
Height - Top of Cab10.8 ft (3 m)
Height - Top of Cylinders113.7 in (289 cm)
Height to Top of Isomount Cab10.8 ft (3 m)
Length - Between Tandem Axles59.5 in (151 cm)
Length - Counterweight to Ripper389.3 in (989 cm)
Length - Front Axle to Mid Tandem232.8 in (591 cm)
Length - Front Axle to Moldboard98.9 in (251 cm)
Length - Front Tire to Rear of Machine334.1 in (849 cm)
Overall Length27.9 ft (9 m)
Rear Ground Clearance1.2 ft (0 m)
Tandem Axle Wheelbase5 ft (2 m)
Wheelbase19.4 ft (6 m)
Width - Outside Front Tires97.7 in (248 cm)
Width - Outside Rear Tires97.7 in (248 cm)
Width - Tire Center Lines84.1 in (214 cm)
Width Over Tires8.2 ft (3 m)

Engine

Base Power (1st Gear) - Net138 hp (103 kw)
Base Power (1st Gear) - Net - Metric140 hp (104 kw)
Base Power (All Gears) - Net138 hp (103 kw)
Bore4.2 in (11 cm)
Derating Altitude11500 ft (3,505 m)
Displacement403 cu in (0 m)
EmissionsU.S. EPA Tier 3/EU Stage IIIA equivalent
Engine ModelCat C6.6 ACERT
High - Ambient Capability122 °
High Ambient - Fan Speed - Maximum1,650 rpm
High Ambient - Fan Speed - Minimum600 rpm
Max Power138 hp (103 kw)
Maximum Torque690 lbs/ft
Net Power Gears 7-8138 hp (103 kw)
Number of Cylinders6
Power Measured @2000 rpm
Speed at Rated Power2,000 rpm
Standard - Ambient Capability109 °
Standard - Fan Speed - Maximum1,150 rpm
Standard - Fan Speed - Minimum600 rpm
Stroke5 in (13 cm)
Torque Rise - VHP Plus40%
VHP Plus Range - Net103-136 kW (138-182)
VHP Plus Range - Net - Metric103-136 kW (140-185)
VHP Range - Net103-114 kW (138-153)

Frame

Circle - Blade Beam Thickness1.4 in (4 cm)
Circle - Diameter60.2 in (153 cm)
Drawbar - Height6 in (15 cm)
Drawbar - Thickness0.4 in (1 cm)
Drawbar - Width3 in (8 cm)
Front Axle - Height to Center22.5 in (57 cm)
Front Axle - Total Oscillation per Side32 °
Front Axle - Wheel Lean - Left/Right18 °
Front Frame Structure - Height0.9 ft (0 m)
Front Frame Structure - Width0.9 ft (0 m)

Front Axle

Ground Clearance1.9 ft (1 m)
Oscillation - Total32 °
Wheel Lean18 °

Hydraulic System

Circuit TypeElectro-hydraulic load sensing, closed center
Maximum System Pressure3500 psi
Pump Flow40 gal/min (151 l/min)
Pump Output40 gal/min (151 l/min)
Pump TypeVariable piston
Relief Valve Pressure3500 psi
Standby Pressure450 psi

Moldboard

Arc Radius16.3 in (41 cm)
Blade Down Pressure28887.2 lbs (13,103 kg)
Blade Down Pressure - Base GVW16435 lbs (7,455 kg)
Blade Down Pressure - Maximum GVW29125 lbs (13,211 kg)
Blade Pull - Base GVW20350 lbs (9,231 kg)
Blade Pull - Maximum GVW24218 lbs (10,985 kg)
Blade Pull at Max Weight40221 lbs (18,244 kg)
Blade Width12 ft (4 m)
Cutting Edge Thickness0.6 in (2 cm)
Cutting Edge Width6 in (15 cm)
End Bit - Thickness0.6 in (2 cm)
End Bit - Width6 in (15 cm)
Max Depth of Cut28.3 in (72 cm)
Moldboard - Height24 in (61 cm)
Moldboard - Thickness0.9 in (2 cm)
Moldboard - Width12 ft (4 m)
Moldboard Height24 in (61 cm)
Moldboard Length12 ft (4 m)
Moldboard Thickness0.9 in (2 cm)
Moldboard Width12 ft (4 m)
Side Shift Left20.1 in (51 cm)
Side Shift Right26 in (66 cm)
Throat Clearance5.2 in (13 cm)

Operating Specifications

Articulation Angle - Left/Right20 °
Circle Gearbox Fluid Capacity1.8 gal (7 l)
Cooling System Fluid Capacity10.4 gal (39 l)
Forward - 1st2.4 mph (4 kph)
Forward - 2nd3.3 mph (5 kph)
Forward - 3rd4.8 mph (8 kph)
Forward - 4th6.5 mph (10 kph)
Forward - 5th10.2 mph (16 kph)
Forward - 6th13.8 mph (22 kph)
Forward - 7th19 mph (31 kph)
Forward - 8th27.7 mph (45 kph)
Fuel Capacity90 gal (341 l)
Hydraulic System Fluid Capacity15.9 gal (60 l)
Max Operation Weight - Front Axle16312 lbs (7,399 kg)
Max Operation Weight - Rear Axle28378 lbs (12,872 kg)
Max Operation Weight - Total44690 lbs (20,271 kg)
Operating Weight 31069 lbs (14,093 kg)
Rear Diff/Final Drive Fluid Capacity13.2 gal (50 l)
Reverse - 1st2 mph
Reverse - 2nd3.8 mph (6 kph)
Reverse - 3rd5.6 mph (9 kph)
Reverse - 4th8.6 mph (14 kph)
Reverse - 5th16.1 mph (26 kph)
Reverse - 6th23.5 mph (38 kph)
Std Operation Weight - Front Axle8233 lbs (3,735 kg)
Std Operation Weight - Rear Axle22836 lbs (10,358 kg)
Std Operation Weight - Total31069 lbs (14,093 kg)
Steering Range - Left/Right47.5 °
Tandem Case Fluid Capacity (each)16.9 gal (64 l)
Top Speed - Forward27.7 mph (45 kph)
Top Speed - Reverse23.5 mph (38 kph)
Turning Radius - Outside Front Tires24.5 ft (7 m)

Power Train

Brakes - ParkingMultiple oil disc
Brakes - SecondaryDual circuit control system
Brakes - ServiceMultiple oil-disc
Brakes - Service - Surface Area3565 cu in (0 m)
Forward/Reverse Gears8 Fwd / 6 Rev
TransmissionDirect drive, power shift, countershaft

Ripper

Machine Length Increase, Beam Raised39.2 in (100 cm)
Penetration Force17705 lbs (8,031 kg)
Pry-Out Force26303 lbs (11,931 kg)
Ripper Shank Holder Spacing21 in (53 cm)
Ripper Shank Holders5
Ripping Depth - Maximum17 in (43 cm)

Scarifier

Front, V-Type, 5 or 11 Tooth - Scarifier Shank Holder Spacing4.6 in (12 cm)
Front, V-Type, 5 or 11 Tooth - Scarifying Depth, Maximum18.4 in (47 cm)
Front, V-Type, 5 or 11 Tooth - Working Width47.4 in (120 cm)
Mid, Straight - Scarifier Shank Holder Spacing4.4 in (11 cm)
Mid, Straight - Scarifier Shank Holders17
Mid, Straight - Scarifying Depth, Maximum12.5 in (32 cm)
Mid, Straight - Working Width71 in (180 cm)
Mid, V-Type - Scarifier Shank Holder Spacing4.6 in (12 cm)
Mid, V-Type - Scarifier Shank Holders11
Mid, V-Type - Scarifying Depth, Maximum11.5 in (29 cm)
Mid, V-Type - Working Width46.6 in (118 cm)
Rear - Scarifier Shank Holder Spacing10.5 in (27 cm)
Rear - Scarifier Shank Holders9
Rear - Scarifying Depth, Maximum10.5 in (27 cm)
Rear - Working Width91 in (231 cm)

Service Refill

Circle Drive Housing1.8 gal (7 l)
Cooling System8.7 gal (33 l)
Engine Oil3.7 gal (14 l)
Front Wheel Spindle Bearing Housing0.1 gal (0 l)
Fuel Capacity90 gal (341 l)
Hydraulic System - Tank16.9 gal (64 l)
Tandem Housing - Each15.6 gal (59 l)
Transmission - Differential - Final Drives16.5 gal (62 l)

Standards

BrakesISO 3450:1996
ROPS/FOPSISO 3471:1992 / ISO 3449:1992
SoundISO 6394:1998 / ISO 6395:1988
SteeringISO 5010:1992

Steering System

Articulation Angle 20 °
Articulation Angle20 °
Turning Radius24.5 ft (7 m)

Tandems

Drive Chain Pitch1.8 in (5 cm)
Height19.8 in (50 cm)
Sidewall Thickness - Inner0.5 in (1 cm)
Sidewall Thickness - Outer0.6 in (2 cm)
Tandem Oscillation - Front Down25 °
Tandem Oscillation - Front Up15 °
Wheel Axle Spacing59.5 in (151 cm)
Width6.8 in (17 cm)

Transmission

Max Speed - Forward27.7 mph (45 kph)
Max Speed - Reverse23.5 mph (38 kph)
Number of Gears - Forward8
Number of Gears - Reverse6
Transmission Typedirect drive, power shift, countershaft

Weights

Gross Vehicle Weight - Base - Front Axle9303 lbs (4,220 kg)
Gross Vehicle Weight - Base - Rear Axle26479 lbs (12,011 kg)
Gross Vehicle Weight - Base - Total35783 lbs (16,231 kg)
Gross Vehicle Weight - Maximum - Front Axle15077 lbs (6,839 kg)
Gross Vehicle Weight - Maximum - Rear Axle33523 lbs (15,206 kg)
Gross Vehicle Weight - Maximum - Total48601 lbs (22,045 kg)
Gross Vehicle Weight - Typically Equipped - Front Axle11221 lbs (5,090 kg)
Gross Vehicle Weight - Typically Equipped - Total40565 lbs (18,400 kg)
Operating Weight - Typically Equipped40565 lbs (18,400 kg)

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