Caterpillar 120K Motor Grader Specs

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

The Caterpillar 120K is a motor grader designed for road construction, maintenance, and surface finishing applications. It is part of Caterpillar's 120-series grader line and is commonly used for grading, ditching, slope work, and material spreading. The 120K features a front-mounted blade, articulated frame, and operator controls suited to precise blade positioning and grade control. It is typically powered by a diesel engine and configured for municipal, highway, mining, and site preparation work. The model is known for its balance of maneuverability, visibility, and control in grading operations across varied terrain and jobsite conditions.

General Specifications

Caterpillar 120K Motor Grader General Specifications specifications
Displacement	439.00 cu in (7.20 L) - Starting 2010
Electrical - Std. Alternator	115 amp - Starting 2015
Electrical - Std. Battery CCA @ 0° F	750 - Starting 2010
Electrical - System Size	24V - Starting 2010
Engine Model	C7 ACERT VHP - Starting 2010
Front Axle/Steering - Articulation Angle	20 deg - Starting 2010
Front Axle/Steering - Minimum Turning Radius	287.00 in (7.30 m) - Starting 2015
Front Axle/Steering - Minimum Turning Radius**	287.00 in (7.30 m) - Starting 2018
Front Axle/Steering - Oscillation Angle	32 deg - Starting 2010
Front Axle/Steering - Steering Angle	47.5 deg - Starting 2010
Front Axle/Steering - Wheel Lean Angle	18 deg - Starting 2010
Front Frame Section Modulus - Max.	225.00 sq in (3,681.00 sq cm) - Starting 2010
Front Frame Section Modulus - Min.	99.00 sq in (1,619.00 sq cm) - Starting 2010
Fuel Tank Capacity	80.60 US gal (305.00 L) - Starting 2010
Gear 3	145.00 hp (108.00 kW) - Starting 2012
Gear 3 (cid:3)	135.00 hp (101.00 kW) - Starting 2010
Gears 1-2	145.00 hp (108.00 kW) - Starting 2012
Gears 1-2 (cid:3)	125.00 hp (93.00 kW) - Starting 2010
GENERAL DIMENSIONS - Blade Base	102.00 in (2.60 m) - Starting 2010
GENERAL DIMENSIONS - Height	24.00 in (610.00 mm) - Starting 2010
GENERAL DIMENSIONS - Height (No Cab/Canopy)	114.00 in (2.88 m) - Starting 2010
GENERAL DIMENSIONS - Height (No Cab/Canopy)***	114.00 in (2.88 m) - Starting 2018
GENERAL DIMENSIONS - Height (to top of ROPS)	131.00 in (3.33 m) - Starting 2010
GENERAL DIMENSIONS - Lift Above Ground	16.00 in (410.00 mm) - Starting 2010
GENERAL DIMENSIONS - Overall Length	324.00 in (8.24 m) - Starting 2010
GENERAL DIMENSIONS - Overall Width (at top of front tires)	97.00 in (2.46 m) - Starting 2010
GENERAL DIMENSIONS - Standard Blade: Height	24.00 in (610.00 mm) - Starting 2013
GENERAL DIMENSIONS - Standard Blade: Length	144.00 in (3.66 m) - Starting 2010
GENERAL DIMENSIONS - Standard Blade: Thickness	0.87 in (22.00 mm) - Starting 2013
GENERAL DIMENSIONS - Thickness	0.87 in (22.00 mm) - Starting 2010
GENERAL DIMENSIONS - Wheelbase	231.00 in (5.87 m) - Starting 2010
GENERAL DIMENSIONS - With Ripper and Pushplate	385.00 in (9.77 m) - Starting 2010
Hydraulics: Pump Type	Variable Piston - Starting 2010
Implement Pressure: Max.	3,699.00 psi (25,500.00 kPa) - Starting 2010
Implement Pressure: Min.	522.00 psi (3,600.00 kPa) - Starting 2013
Max. Pump Flow	55.70 US gpm (210.00 L/min) - Starting 2015
Max. Shoulder Reach - Frame Straight - left	69.00 in (1.76 m) - Starting 2012
Max. Shoulder Reach - Frame Straight - right	76.00 in (1.93 m) - Starting 2012
Max. Shoulder Reach: (cid:4) - Frame Straight - left	69.00 in (1.76 m) - Starting 2010
Max. Shoulder Reach: (cid:4) - Frame Straight - right	76.00 in (1.93 m) - Starting 2010
Max. Torque	571.00 lb-ft (774.00 N-m) - Starting 2012
Min.	522.00 psi (3,600.00 kPa) - Starting 2010
Net Flywheel Power: Gear 3	135.00 hp (101.00 kW) - Starting 2015
Net Flywheel Power: Gears 1-2	125.00 hp (93.00 kW) - Starting 2015
Net Flywheel Power: Gears 4-8	145.00 hp (108.00 kW) - Starting 2010
Net Power	125-145 hp - Starting 2012
No. Circle Support Shoes	4 - Starting 2010
No. of Cylinders	6 - Starting 2010
No. of Speeds Forward/Reverse	8/6 - Starting 2010
Operating Weight (Typical)	30,519.00 lbs (13,843.00 kg) - Starting 2015
Operating Weight (Typical)*	30,519.00 lbs (13,843.00 kg) - Starting 2018
Operating Weight - Typically Equipped	30,455 lb - Starting 2012
Rated Engine RPM	2000 rpm - Starting 2010
Reservoir Tank Capacity	14.50 US gal (55.00 L) - Starting 2010
Reverse	22.40 mph (36.10 km/h) - Starting 2010
Standard Blade Length	12.00 ft (3.66 m) - Starting 2012
Std. Tires - Front and Rear	14.00-24 12 PR (G-2 - Starting 2013
Top Speed: Forward	29.50 mph (47.50 km/h) - Starting 2015
Top Speed: Reverse	23.30 mph (37.50 km/h) - Starting 2015

Dimensions

Caterpillar 120K Motor Grader Dimensions specifications
Height	10.92 ft (3.33 m)
Length	32.08 ft (9.78 m)
Weight	37,478.00 lbs (16,999.76 kg)
Width	8.08 ft (2.46 m)

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Caterpillar 120K Motor Grader Specs

General Specifications

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