Caterpillar 120G Motor Grader Specs

Category: Motor Graders ➔
Manufacturer: Caterpillar ➔
Model: 120G ➔

The Caterpillar 120G is a motor grader used for road construction, maintenance, and fine grading applications. Produced by Caterpillar, the 120G is part of the company's G-series grader lineup and is commonly used for shaping surfaces, spreading material, ditching, and maintaining gravel or paved roads. It typically features a front-mounted moldboard, articulated frame, and rear tandem drive for controlled grading performance. The 120G is recognized in the used equipment market for its mechanical simplicity, serviceability, and suitability for municipal, contractor, and site preparation work. Specifications vary by configuration, year, and regional market.

General Specifications

Caterpillar 120G Motor Grader General Specifications specifications
Approx. Ship Wt.	28,350.00 lbs (12,859.00 kg) - Starting 1973
Controls	Hyd. - Starting 1973
Horse- power, Rated	125.00 hp (93.21 kw) - Starting 1973
Length	312.00 in (7.92 m) - Starting 1973
Maximum Forward Speed	25.40 mph (40.90 km/h) - Starting 1973
Maximum Reverse Speed	25.40 mph (40.90 km/h) - Starting 1973
Mold- board Length	144.00 in (3.66 m) - Starting 1973
Product Identification Prefix	11W(AUSTL) - Starting 1981
Turning Radius	264.00 in (6.70 m) - Starting 1973
Wheel- base	224.00 in (5.69 m) - Starting 1973
Width	96.00 in (2.45 m) - Starting 1973

Circle

Caterpillar 120G Motor Grader Circle specifications
Max Lift Above Ground	16.20 in (41.15 cm)

Dimensions

Caterpillar 120G Motor Grader Dimensions specifications
Blade Base	8.17 ft (2.49 m)
Height	10.75 ft (3.28 m)
Height To Top Of Isomount Cab	10.93 ft (3.33 m)
Length	26.00 ft (7.92 m)
Overall Length	26.02 ft (7.93 m)
Weight	28,350.00 lbs (12,859.36 kg)
Wheelbase	18.67 ft (5.69 m)
Width	7.75 ft (2.36 m)
Width Over Tires	7.91 ft (2.41 m)

Engine

Caterpillar 120G Motor Grader Engine specifications
Displacement	427.20 cu in (7,000.57 cu cm)
Engine Make	2236
Engine Model	3304
Max Power	125.00 hp (93.21 kw)
Net Power Gear 5-6	125.00 hp (93.21 kw)

Operational

Caterpillar 120G Motor Grader Operational specifications
Fuel Capacity	60.00 gal (227.10 l)
Std Operation Weight - Total	25,320.10 lbs (11,485.02 kg)
Tire Size	13x24 8 PR

Steering

Caterpillar 120G Motor Grader Steering specifications
Turning Radius	22.00 ft (6.71 m)

Transmission

Caterpillar 120G Motor Grader Transmission specifications
Max Speed - Forward	25.50 mph (41.04 kph)
Max Speed - Reverse	25.50 mph (41.04 kph)
Number Of Gears - Forward	6
Number Of Gears - Reverse	6

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