- Category: Motor Graders ➔
- Manufacturer: Caterpillar ➔
- Model: 120H ➔
The Caterpillar 120H is a motor grader designed for road construction, maintenance, and grading applications. Built by Caterpillar, the 120H is known for its articulated frame, moldboard control, and operator-focused cab layout. It is commonly used for shaping surfaces, ditching, snow removal, and fine grading on highways, municipal roads, and job sites. The machine typically features a diesel engine, hydraulic blade controls, and a rear tandem drive for traction and stability. As a Caterpillar motor grader, the 120H is recognized for durability, serviceability, and versatility in earthmoving and surface finishing operations.
Circle
| Blade Tip Angle - Front | 40 degrees
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| Blade Tip Angle - Rear | 5 degrees
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| Diameter | 60 in (153 cm)
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| Max Lift Above Ground | 18 in (46 cm)
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| Max Reach Outside Tires - Left | 73 in (184 cm)
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| Max Reach Outside Tires - Right | 75 in (191 cm)
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| Rotation | 360 degrees
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| Shift Left | 25 in (63 cm)
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| Shift Right | 25 in (63 cm)
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Dimensions
| Blade Base | 9 ft (3 m)
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| Front Ground Clearance | 2 ft (1 m)
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| Height to Top of Isomount Cab | 10 ft (3 m)
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| Overall Length | 27 ft (8 m)
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| Tandem Axle Wheelbase | 5 ft (2 m)
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| Wheelbase | 19 ft (6 m)
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| Width Over Tires | 8 ft (2 m)
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Engine
| Aspiration | turbocharged
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| Displacement | 403 cu in (6,601 cu cm)
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| Engine Model | 3116 DITA
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| Max Power | 140 hp (104 kw)
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| Net Power Gear 1-2 | 125 hp (93 kw)
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| Net Power Gear 4-6 | 125 hp (93 kw)
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| Net Power Gears 7-8 | 140 hp (104 kw)
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| Number of Cylinders | 6
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| Power Measured @ | 2000 rpm
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| Torque Measured @ | 1400 rpm
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Front Axle
| Ground Clearance | 2 ft (1 m)
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| Oscillation - Total | 32 degrees
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| Wheel Lean | 18 degrees
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Hydraulic System
| Pump Flow | 39 gpm (148 lpm)
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| Pump Type | Axial Piston
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| Relief Valve Pressure | 3500 psi
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Moldboard
| Blade Down Pressure | 20,062 lbs (9,100 kg)
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| Blade Pull at Max Weight | 23,504 lbs (10,661 kg)
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| Max Depth of Cut | 31 in (78 cm)
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| Moldboard Height | 24 in (61 cm)
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| Moldboard Thickness | 1 in (2 cm)
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| Moldboard Width | 12 ft (4 m)
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| Side Shift Left | 21 in (53 cm)
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| Side Shift Right | 26 in (66 cm)
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Operating Specifications
| Alternator Supplied Amperage | 50 amps
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| Circle Gearbox Fluid Capacity | 2 gal (7 l)
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| Cooling System Fluid Capacity | 11 gal (40 l)
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| Hydraulic System Fluid Capacity | 18 gal (68 l)
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| Oil System Fluid Capacity | 6 gal (23 l)
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| Operating Voltage | 24 volts
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| Rear Diff/Final Drive Fluid Capacity | 13 gal (47 l)
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| Std Operation Weight - Front Axle | 7,880 lbs (3,574 kg)
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| Std Operation Weight - Rear Axle | 19,720 lbs (8,945 kg)
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| Tandem Case Fluid Capacity (each) | 13 gal (49 l)
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Steering System
| Articulation Angle | 20 degrees
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| Turning Radius | 24 ft (7 m)
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Transmission
| Max Speed - Forward | 27 mph (43 kph)
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| Max Speed - Reverse | 21 mph (34 kph)
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| Number of Gears - Forward | 8
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| Number of Gears - Reverse | 6
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| Transmission Type | direct drive powershift
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