Overview
The Caterpillar 120M is a motor grader listed in the Heavy Equipment Hub equipment database with structured specifications for comparison, research, and machine selection. Key specification points include fuel capacity of 90.0 gal and hydraulic capacity of 15.9 gal. This model can be reviewed for equipment comparison, jobsite planning, fleet research, and specification-based machine selection. Use the full specifications table to compare the Caterpillar 120M against similar motor grader models by power, weight, capacity, dimensions, speed, and other technical values.
Key Specifications
Std Operation Weight - Total
31,069
lb
Max Power
138
hp
Moldboard Width
12
ft
Overall Length
27.85
ft
Full Specifications
191 specs
Dimensions
Blade Base
8.24 in / 209 mm
Blade Width
12 ft / 3.66 m
Front Ground Clearance
1.87 ft / 0.57 m
Ground Clearance - Rear Axle
13.60 ft / 4.15 m
Height - Exhaust Stack
112.40 in / 2,855 mm
Height - Front Axle Center
22.50 ft / 6.86 m
Height - Top Of Cab
10.75 ft / 3.28 m
Height - Top Of Cylinders
113.70 in / 2,888 mm
Height To Top Of Isomount Cab
10.75 ft / 3.28 m
Length - Between Tandem Axles
59.50 in / 1,511 mm
Length - Counterweight To Ripper
389.30 in / 9,888 mm
Length - Front Axle To Mid Tandem
232.80 in / 5,913 mm
Length - Front Axle To Moldboard
98.85 in / 2,511 mm
Length - Front Tire To Rear Of Machine
334.10 in / 8,486 mm
Machine Length Increase, Beam Raised
39.20 ft / 11.95 m
Overall Length
27.85 ft / 8.49 m
Penetration Force
17,705 lb / 8,031 kg
Pry-Out Force
26,303 lb / 11,931 kg
Rear Ground Clearance
1.13 ft / 0.34 m
Ripper Shank Holder Spacing
21
Ripper Shank Holders
5
Ripping Depth - Maximum
17 ft / 5.18 m
Tandem Axle Wheelbase
4.96 ft / 1.51 m
Wheelbase
19.40 ft / 5.91 m
Width - Outside Front Tires
97.70 in / 2,482 mm
Width - Outside Rear Tires
97.70 in / 2,482 mm
Width - Tire Center Lines
84.10 in / 2,136 mm
Width Over Tires
8.14 ft / 2.48 m
Engine
Articulation Angle
20 deg
Base Power (1st Gear) - Net
138
Base Power (1st Gear) - Net - Metric
140
Base Power (All Gears) - Net
138
Blade Down Pressure
28,887 lb / 13,103 kg
Blade Pull At Max Weight
40,221 lb / 18,244 kg
Bore
4.20 in / 107 mm
Brakes - Service - Surface Area
3,565
Circle - Blade Beam Thickness
1.40 in / 36 mm
Circle - Diameter
60.20 in / 1,529 mm
Circle Gearbox Fluid Capacity
1.80 gal / 6.8 L
Cooling System Fluid Capacity
10.40 gal / 39.4 L
Derating Altitude
11,500
Displacement
403 cu in / 6.6 L
Drawbar - Height
6 ft / 1.83 m
Drawbar - Thickness
0.40
Drawbar - Width
3 ft / 0.91 m
Drawbar - Yoke Bar Thickness
0.80
Emissions
U.S. EPA Tier 3/EU Stage IIIA equivalent
Engine Make
2236
Engine Model
C6.6 ACERT VHP
Forward/Reverse Gears
8
Front Axle - Height To Center
22.50 ft / 6.86 m
Front Frame Structure - Height
0.90 ft / 0.27 m
Front Frame Structure - Thickness
0.10
Front Frame Structure - Width
0.90 ft / 0.27 m
Fuel Capacity
90 gal / 340.7 L
Gross Vehicle Weight - Base - Front Axle
9,303 lb / 4,220 kg
Gross Vehicle Weight - Base - Rear Axle
26,479 lb / 12,011 kg
Gross Vehicle Weight - Base - Total
35,783 lb / 16,231 kg
Gross Vehicle Weight - Maximum - Front Axle
15,077 lb / 6,839 kg
Gross Vehicle Weight - Maximum - Rear Axle
33,523 lb / 15,206 kg
Gross Vehicle Weight - Maximum - Total
48,601 lb / 22,045 kg
Gross Vehicle Weight - Typically Equipped - Front Axle
11,221 lb / 5,090 kg
Gross Vehicle Weight - Typically Equipped - Rear Axle
29,343 lb / 13,310 kg
Gross Vehicle Weight - Typically Equipped - Total
40,565 lb / 18,400 kg
Ground Clearance
1.90 ft / 0.58 m
Height
19.80 ft / 6.04 m
High - Ambient Capability
122
High Ambient - Fan Speed - Maximum
1,650 rpm
High Ambient - Fan Speed - Minimum
600 rpm
Hydraulic System Fluid Capacity
15.90 gal / 60.2 L
Max Depth Of Cut
28.30 ft / 8.63 m
Max Operation Weight - Front Axle
16,312 lb / 7,399 kg
Max Operation Weight - Rear Axle
28,378 lb / 12,872 kg
Max Operation Weight - Total
44,690 lb / 20,271 kg
Max Power
138 hp / 102.9 kW
Max Speed - Forward
27.70 mph / 44.6 km/h
Max Speed - Reverse
23.50 mph / 37.8 km/h
Maximum Lift Above Ground
16.80 in / 427 mm
Maximum Torque
690 lb-ft / 936 Nm
Maximum Torque - Vhp Plus - Net
668 lb-ft / 906 Nm
Moldboard Height
24 in / 610 mm
Moldboard Thickness
0.90 in / 23 mm
Moldboard Width
12 ft / 3.66 m
Net Power Gears 7-8
138 hp / 102.9 kW
Number Of Gears - Forward
8
Number Of Gears - Reverse
6
Number of Cylinders
6
Operating Weight - Typically Equipped
40,565 lb / 18,400 kg
Oscillation - Total
32 deg
Power Measured @
2,000 rpm
Pump Flow
40 gal/min / 151.4 L/min
Rear Diff/Final Drive Fluid Capacity
13.20 gal / 50.0 L
Relief Valve Pressure
3,500 psi / 241.3 bar
Side Shift Left
20.10 in / 511 mm
Side Shift Right
26 in / 660 mm
Speed At Rated Power
2,000 rpm
Standard - Ambient Capability
109
Standard - Fan Speed - Maximum
1,150 rpm
Standard - Fan Speed - Minimum
600 rpm
Std Operation Weight - Front Axle
8,233 lb / 3,734 kg
Std Operation Weight - Rear Axle
22,836 lb / 10,358 kg
Std Operation Weight - Total
31,069 lb / 14,093 kg
Steering
ISO 5010:1992
Stroke
5 in / 127 mm
Tandem Case Fluid Capacity (Each)
16.90 gal / 64.0 L
Torque Rise - Vhp Plus
40 lb-ft / 54 Nm
Turning Radius
24.50 ft / 7.47 m
Wheel Lean
18 deg
Width
6.80 ft / 2.07 m
Hydraulics
Arc Radius
16.30 ft / 4.97 m
Blade Down Pressure - Base Gvw
16,435 lb / 7,455 kg
Blade Down Pressure - Maximum Gvw
29,125 lb / 13,211 kg
Blade Pull - Base Gvw
20,350 lb / 9,231 kg
Blade Pull - Maximum Gvw
24,218 lb / 10,985 kg
Blade Tip Angle - Front
40 deg
Blade Tip Angle - Rear
5 deg
Cutting Edge Thickness
0.60
Cutting Edge Width
6 ft / 1.83 m
Diameter
60.20 in / 1,529 mm
End Bit - Thickness
0.60
End Bit - Width
6 ft / 1.83 m
Engine Oil
3.70 gal / 14.0 L
Max Lift Above Ground
16.80 in / 427 mm
Max Reach Outside Tires - Left
68.60 ft / 20.91 m
Max Reach Outside Tires - Right
75 ft / 22.86 m
Maximum System Pressure
3,500 psi / 241.3 bar
Moldboard - Height
24 ft / 7.32 m
Moldboard - Thickness
0.90
Moldboard - Width
12 ft / 3.66 m
Pump Output
40 gal/min / 151.4 L/min
Shift Left
25.80 in / 655 mm
Shift Right
25.80 in / 655 mm
Standby Pressure
450 psi / 31.0 bar
Throat Clearance
5.20 ft / 1.58 m
Other
5 / 11
5
Circle Centershift - Left
25.80
Circle Centershift - Right
25.80
Circle Drive Housing
1.80
Drive Chain Pitch
1.80
Forward - 1st
2.40
Forward - 2nd
3.30
Forward - 3rd
4.80
Forward - 4th
6.50
Forward - 5th
10.20
Forward - 6th
13.80
Forward - 7th
19
Forward - 8th
27.70
Front Wheel Spindle Bearing Housing
0.10
Front, V-Type, 5 Or 11 Tooth - Scarifier Shank Holder Spacing
4.60
Front, V-Type, 5 Or 11 Tooth - Scarifier Shank Holders
5
Front, V-Type, 5 Or 11 Tooth - Scarifying Depth, Maximum
18.40 ft / 5.61 m
Front, V-Type, 5 Or 11 Tooth - Working Width
47.40 in / 1,204 mm
Hydraulic System - Tank
16.90 gal / 64.0 L
Maximum Depth Of Cut
28.30 ft / 8.63 m
Maximum Shoulder Reach Outside Of Tires - Left
68.60 ft / 20.91 m
Maximum Shoulder Reach Outside Of Tires - Right
75 ft / 22.86 m
Mid, Straight - Scarifier Shank Holder Spacing
4.40
Mid, Straight - Scarifier Shank Holders
17
Mid, Straight - Scarifying Depth, Maximum
12.50 ft / 3.81 m
Mid, Straight - Working Width
71 in / 1,803 mm
Mid, V-Type - Scarifier Shank Holder Spacing
4.60
Mid, V-Type - Scarifier Shank Holders
11
Mid, V-Type - Scarifying Depth, Maximum
11.50 ft / 3.51 m
Mid, V-Type - Working Width
46.60 in / 1,184 mm
Moldboard Sideshift - Left
20.10
Moldboard Sideshift - Right
26
Rear - Scarifier Shank Holder Spacing
10.50
Rear - Scarifier Shank Holders
9
Rear - Scarifying Depth, Maximum
10.50 ft / 3.20 m
Rear - Working Width
91 in / 2,311 mm
Reverse - 1st
2
Reverse - 2nd
3.80
Reverse - 3rd
5.60
Reverse - 4th
8.60
Reverse - 5th
16.10
Reverse - 6th
23.50
Rops/Fops
3,471
Sidewall Thickness - Inner
0.50
Sidewall Thickness - Outer
0.60
Sound
6,394
Steering Range - Left/Right
47.50
Tandem Housing - Each
15.60
Tandem Oscillation - Front Down
25
Tandem Oscillation - Front Up
15
Top Speed - Forward
27.70
Top Speed - Reverse
23.50
Transmission - Differential - Final Drives
16.50
Turning Radius - Outside Front Tires
24.50 ft / 7.47 m
Wheel Axle Spacing
60 lb / 27 kg
Brakes
ISO 3450:1996
Cooling System
8.70 gal / 32.9 L
Videos 1
Related Machines
Frequently Asked Questions
How does the Caterpillar 120M compare to similar Motor Grader models? +
You can compare the Caterpillar 120M side by side with any other model using the Heavy Equipment Hub compare tool. Key comparison points include engine power, operating weight, digging depth, hydraulic flow, and overall dimensions.