The Caterpillar 120H is a motor grader designed for road construction, maintenance, and site preparation. Built by Caterpillar, the 120H is known for its articulated frame, adjustable moldboard, and precise blade control, making it suitable for grading, ditching, and finishing work. It is commonly used in highway projects, municipal road maintenance, and earthmoving applications. The machine typically features a diesel engine, hydraulic controls, and a cab configured for operator visibility and control. As a Caterpillar motor grader, the 120H is part of a widely used equipment line for grading and surface shaping in construction and infrastructure work.
Circle
Caterpillar 120H Motor Grader Circle specifications
Blade Tip Angle - Front
40 degrees
Blade Tip Angle - Rear
5 degrees
Diameter
60.30 in (153.16 cm)
Max Lift Above Ground
18.00 in (45.72 cm)
Max Reach Outside Tires - Left
72.50 in (184.15 cm)
Max Reach Outside Tires - Right
75.30 in (191.26 cm)
Rotation
360 degrees
Shift Left
24.70 in (62.74 cm)
Shift Right
24.80 in (62.99 cm)
Dimensions
Caterpillar 120H Motor Grader Dimensions specifications
Blade Base
8.54 ft (2.60 m)
Front Ground Clearance
2.00 ft (0.61 m)
Height
10.17 ft (3.10 m)
Height To Top Of Isomount Cab
10.21 ft (3.11 m)
Length
28.08 ft (8.56 m)
Overall Length
27.10 ft (8.26 m)
Tandem Axle Wheelbase
4.96 ft (1.51 m)
Weight
27,600.00 lbs (12,519.16 kg)
Wheelbase
19.26 ft (5.87 m)
Width
8.00 ft (2.44 m)
Width Over Tires
8.01 ft (2.44 m)
Engine
Caterpillar 120H Motor Grader Engine specifications
Aspiration
turbocharged
Displacement
402.80 cu in (6,600.72 cu cm)
Engine Make
2236
Engine Model
3116 DITA
Max Power
140.00 hp (104.40 kw)
Net Power Gear 1-2
125.00 hp (93.21 kw)
Net Power Gear 4-6
125.00 hp (93.21 kw)
Net Power Gears 7-8
140.00 hp (104.40 kw)
Number Of Cylinders
6
Power Measured @
2000 rpm
Torque Measured @
1400 rpm
Front Axle
Caterpillar 120H Motor Grader Front Axle specifications
Ground Clearance
2.00 ft (0.61 m)
Oscillation - Total
32 degrees
Wheel Lean
18 degrees
Hydraulic System
Caterpillar 120H Motor Grader Hydraulic System specifications
Pump Flow
39.10 gpm (147.99 lpm)
Pump Type
Axial Piston
Relief Valve Pressure
3500 psi
Moldboard
Caterpillar 120H Motor Grader Moldboard specifications
Blade Down Pressure
20,062.10 lbs (9,098.46 kg)
Blade Pull At Max Weight
23,503.50 lbs (10,659.18 kg)
Max Depth Of Cut
30.60 in (77.72 cm)
Moldboard Height
24.10 in (61.21 cm)
Moldboard Thickness
0.90 in (2.29 cm)
Moldboard Width
12.10 ft (3.69 m)
Side Shift Left
20.70 in (52.58 cm)
Side Shift Right
26.00 in (66.04 cm)
Operational
Caterpillar 120H Motor Grader Operational specifications
Alternator Supplied Amperage
35 amps
Circle Gearbox Fluid Capacity
1.90 gal (7.19 l)
Cooling System Fluid Capacity
10.60 gal (40.12 l)
Fuel Capacity
75.10 gal (284.25 l)
Hydraulic System Fluid Capacity
18.00 gal (68.13 l)
Oil System Fluid Capacity
6.10 gal (23.09 l)
Operating Voltage
24 V
Rear Diff/Final Drive Fluid Capacity
12.50 gal (47.31 l)
Std Operation Weight - Front Axle
7,880.00 lbs (3,573.70 kg)
Std Operation Weight - Rear Axle
19,720.00 lbs (8,943.31 kg)
Std Operation Weight - Total
25,040.20 lbs (11,356.10 kg)
Tandem Case Fluid Capacity (Each)
13.00 gal (49.21 l)
Tire Size
13-24 10PR (G-2)
Steering
Caterpillar 120H Motor Grader Steering specifications
Articulation Angle
20 degrees
Turning Radius
23.70 ft (7.22 m)
Transmission
Caterpillar 120H Motor Grader Transmission specifications
Max Speed - Forward
26.50 mph (42.65 kph)
Max Speed - Reverse
21.00 mph (33.80 kph)
Number Of Gears - Forward
8
Number Of Gears - Reverse
6
Transmission Type
direct drive, powershift
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