Caterpillar 120M Motor Grader

Blades

Blade Tip Range – Backward 5 degrees
Blade Tip Range – Forward 40 degrees
Circle Centershift – Left 26 in (66 cm)
Circle Centershift – Right 26 in (66 cm)
Maximum Blade Position Angle 90 degrees
Maximum Depth of Cut 28 in (72 cm)
Maximum Lift Above Ground 17 in (43 cm)
Maximum Shoulder Reach Outside of Tires – Left 69 in (174 cm)
Maximum Shoulder Reach Outside of Tires – Right 75 in (190 cm)
Moldboard Sideshift – Left 20 in (51 cm)
Moldboard Sideshift – Right 26 in (66 cm)

Circle

Blade Tip Angle – Front 40 degrees
Blade Tip Angle – Rear 5 degrees
Diameter 60 in (153 cm)
Max Lift Above Ground 17 in (43 cm)
Max Reach Outside Tires – Left 69 in (174 cm)
Max Reach Outside Tires – Right 75 in (190 cm)
Shift Left 26 in (66 cm)
Shift Right 26 in (66 cm)

Dimensions

Blade Base 8 ft (3 m)
Front Ground Clearance 2 ft (1 m)
Ground Clearance – Rear Axle 14 in (35 cm)
Height – Exhaust Stack 112 in (285 cm)
Height – Front Axle Center 23 in (57 cm)
Height – Top of Cab 11 ft (3 m)
Height – Top of Cylinders 114 in (289 cm)
Height to Top of Isomount Cab 11 ft (3 m)
Length – Between Tandem Axles 60 in (151 cm)
Length – Counterweight to Ripper 389 in (989 cm)
Length – Front Axle to Mid Tandem 233 in (591 cm)
Length – Front Axle to Moldboard 99 in (251 cm)
Length – Front Tire to Rear of Machine 334 in (849 cm)
Overall Length 28 ft (9 m)
Rear Ground Clearance 1 ft (0 m)
Tandem Axle Wheelbase 5 ft (2 m)
Wheelbase 19 ft (6 m)
Width – Outside Front Tires 98 in (248 cm)
Width – Outside Rear Tires 98 in (248 cm)
Width – Tire Center Lines 84 in (214 cm)
Width Over Tires 8 ft (2 m)

Engine

Base Power (1st Gear) – Net 138 hp (103 kw)
Base Power (1st Gear) – Net – Metric 140 hp (104 kw)
Base Power (All Gears) – Net 138 hp (103 kw)
Bore 4 in (11 cm)
Derating Altitude 11,500 ft (3,505 m)
Displacement 403 cu in (6,604 cu cm)
Emissions U.S. EPA Tier 3/EU Stage IIIA equivalent
Engine Model Cat C6.6 ACERT
High – Ambient Capability 122 degrees
High Ambient – Fan Speed – Maximum 1,650 rpm
High Ambient – Fan Speed – Minimum 600 rpm
Max Power 138 hp (103 kw)
Maximum Torque 690 lbs ft (936 nm)
Net Power Gears 7-8 138 hp (103 kw)
Number of Cylinders 6
Power Measured @ 2000 rpm
Speed at Rated Power 2,000 rpm
Standard – Ambient Capability 109 degrees
Standard – Fan Speed – Maximum 1,150 rpm
Standard – Fan Speed – Minimum 600 rpm
Stroke 5 in (13 cm)
Torque Rise – VHP Plus 40%
VHP Plus Range – Net 103-136 kW (138-182)
VHP Plus Range – Net – Metric 103-136 kW (140-185)
VHP Range – Net 103-114 kW (138-153)

Frame

Circle – Blade Beam Thickness 1 in (4 cm)
Circle – Diameter 60 in (153 cm)
Drawbar – Height 6 in (15 cm)
Drawbar – Thickness 0 in (1 cm)
Drawbar – Width 3 in (8 cm)
Front Axle – Height to Center 23 in (57 cm)
Front Axle – Total Oscillation per Side 32 degrees
Front Axle – Wheel Lean – Left/Right 18 degrees
Front Frame Structure – Height 1 ft (0 m)
Front Frame Structure – Width 1 ft (0 m)

Front Axle

Ground Clearance 2 ft (1 m)
Oscillation – Total 32 degrees
Wheel Lean 18 degrees

Hydraulic System

Circuit Type Electro-hydraulic load sensing, closed center
Maximum System Pressure 3500 psi
Pump Flow 40 gpm (151 lpm)
Pump Output 40 gpm (151 lpm)
Pump Type Variable piston
Relief Valve Pressure 3500 psi
Standby Pressure 450 psi

Moldboard

Arc Radius 16 in (41 cm)
Blade Down Pressure 28,887 lbs (13,103 kg)
Blade Down Pressure – Base GVW 16,435 lbs (7,455 kg)
Blade Down Pressure – Maximum GVW 29,125 lbs (13,211 kg)
Blade Pull – Base GVW 20,350 lbs (9,231 kg)
Blade Pull – Maximum GVW 24,218 lbs (10,985 kg)
Blade Pull at Max Weight 40,221 lbs (18,244 kg)
Blade Width 12 ft (4 m)
Cutting Edge Thickness 1 in (2 cm)
Cutting Edge Width 6 in (15 cm)
End Bit – Thickness 1 in (2 cm)
End Bit – Width 6 in (15 cm)
Max Depth of Cut 28 in (72 cm)
Moldboard – Height 24 in (61 cm)
Moldboard – Thickness 1 in (2 cm)
Moldboard – Width 12 ft (4 m)
Moldboard Height 24 in (61 cm)
Moldboard Length 12 ft (4 m)
Moldboard Thickness 1 in (2 cm)
Moldboard Width 12 ft (4 m)
Side Shift Left 20 in (51 cm)
Side Shift Right 26 in (66 cm)
Throat Clearance 5 in (13 cm)

Operating Specifications

Articulation Angle – Left/Right 20 degrees
Circle Gearbox Fluid Capacity 2 gal (7 l)
Cooling System Fluid Capacity 10 gal (39 l)
Forward – 1st 2 mph (4 kph)
Forward – 2nd 3 mph (5 kph)
Forward – 3rd 5 mph (8 kph)
Forward – 4th 7 mph (10 kph)
Forward – 5th 10 mph (16 kph)
Forward – 6th 14 mph (22 kph)
Forward – 7th 19 mph (31 kph)
Forward – 8th 28 mph (45 kph)
Fuel Capacity 90 gal (341 l)
Hydraulic System Fluid Capacity 16 gal (60 l)
Max Operation Weight – Front Axle 16,312 lbs (7,399 kg)
Max Operation Weight – Rear Axle 28,378 lbs (12,872 kg)
Max Operation Weight – Total 44,690 lbs (20,271 kg)
Operating Weight 31,069 lbs (14,093 kg)
Rear Diff/Final Drive Fluid Capacity 13 gal (50 l)
Reverse – 1st 2
Reverse – 2nd 4 mph (6 kph)
Reverse – 3rd 6 mph (9 kph)
Reverse – 4th 9 mph (14 kph)
Reverse – 5th 16 mph (26 kph)
Reverse – 6th 24 mph (38 kph)
Std Operation Weight – Front Axle 8,233 lbs (3,734 kg)
Std Operation Weight – Rear Axle 22,836 lbs (10,358 kg)
Std Operation Weight – Total 31,069 lbs (14,093 kg)
Steering Range – Left/Right 47.5 degrees
Tandem Case Fluid Capacity (each) 17 gal (64 l)
Top Speed – Forward 28 mph (45 kph)
Top Speed – Reverse 24 mph (38 kph)
Turning Radius – Outside Front Tires 25 ft (7 m)

Power Train

Brakes – Parking Multiple oil disc
Brakes – Secondary Dual circuit control system
Brakes – Service Multiple oil-disc
Brakes – Service – Surface Area 3,565 cu in (58,420 cu cm)
Forward/Reverse Gears 8 Fwd / 6 Rev
Transmission Direct drive, power shift, countershaft

Ripper

Machine Length Increase, Beam Raised 39 in (100 cm)
Penetration Force 17,705 lbs (8,031 kg)
Pry-Out Force 26,303 lbs (11,931 kg)
Ripper Shank Holder Spacing 21 in (53 cm)
Ripper Shank Holders 5
Ripping Depth – Maximum 17 in (43 cm)

Scarifier

Front, V-Type, 5 or 11 Tooth – Scarifier Shank Holder Spacing 5 in (12 cm)
Front, V-Type, 5 or 11 Tooth – Scarifying Depth, Maximum 18 in (47 cm)
Front, V-Type, 5 or 11 Tooth – Working Width 47 in (120 cm)
Mid, Straight – Scarifier Shank Holder Spacing 4 in (11 cm)
Mid, Straight – Scarifier Shank Holders 17
Mid, Straight – Scarifying Depth, Maximum 13 in (32 cm)
Mid, Straight – Working Width 71 in (180 cm)
Mid, V-Type – Scarifier Shank Holder Spacing 5 in (12 cm)
Mid, V-Type – Scarifier Shank Holders 11
Mid, V-Type – Scarifying Depth, Maximum 12 in (29 cm)
Mid, V-Type – Working Width 47 in (118 cm)
Rear – Scarifier Shank Holder Spacing 11 in (27 cm)
Rear – Scarifier Shank Holders 9
Rear – Scarifying Depth, Maximum 11 in (27 cm)
Rear – Working Width 91 in (231 cm)

Service Refill

Circle Drive Housing 2 gal (7 l)
Cooling System 9 gal (33 l)
Engine Oil 4 gal (14 l)
Front Wheel Spindle Bearing Housing 0 gal (0 l)
Fuel Capacity 90 gal (341 l)
Hydraulic System – Tank 17 gal (64 l)
Tandem Housing – Each 16 gal (59 l)
Transmission – Differential – Final Drives 17 gal (62 l)

Standards

Brakes ISO 3450:1996
ROPS/FOPS ISO 3471:1992 / ISO 3449:1992
Sound ISO 6394:1998 / ISO 6395:1988
Steering ISO 5010:1992

Steering System

Articulation Angle 20 degrees
Turning Radius 25 ft (7 m)

Tandems

Drive Chain Pitch 2 in (5 cm)
Height 20 in (50 cm)
Sidewall Thickness – Inner 1 in (1 cm)
Sidewall Thickness – Outer 1 in (2 cm)
Tandem Oscillation – Front Down 25 degrees
Tandem Oscillation – Front Up 15 degrees
Wheel Axle Spacing 60 in (151 cm)
Width 7 in (17 cm)

Transmission

Max Speed – Forward 28 mph (45 kph)
Max Speed – Reverse 24 mph (38 kph)
Number of Gears – Forward 8
Number of Gears – Reverse 6
Transmission Type direct drive, power shift, countershaft

Weights

Gross Vehicle Weight – Base – Front Axle 9,303 lbs (4,220 kg)
Gross Vehicle Weight – Base – Rear Axle 26,479 lbs (12,011 kg)
Gross Vehicle Weight – Base – Total 35,783 lbs (16,231 kg)
Gross Vehicle Weight – Maximum – Front Axle 15,077 lbs (6,839 kg)
Gross Vehicle Weight – Maximum – Rear Axle 33,523 lbs (15,206 kg)
Gross Vehicle Weight – Maximum – Total 48,601 lbs (22,045 kg)
Gross Vehicle Weight – Typically Equipped – Front Axle 11,221 lbs (5,090 kg)
Gross Vehicle Weight – Typically Equipped – Total 40,565 lbs (18,400 kg)
Operating Weight – Typically Equipped 40,565 lbs (18,400 kg)
Ask A Question