Categories ↠ Motor Graders ↠ Caterpillar 12G

Caterpillar 12G Motor Grader

Category: Motor Graders ➔
Manufacturer: Caterpillar ➔
Model: 12G ➔

The Caterpillar 12G is a motor grader designed for road construction, maintenance, and site preparation. Built by Caterpillar, the 12G features a moldboard for grading, leveling, and shaping surfaces, along with a front axle and articulated frame for maneuverability. It is commonly used in highway work, mining support, and municipal grading applications. The machine is known for its mechanical drivetrain, operator cab, and hydraulic blade control systems typical of its era. As a Caterpillar motor grader, the 12G remains a recognized model in used equipment, parts, and equipment reference searches for grading and earthmoving applications.

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Circle

Blade Tip Angle - Front	90 degrees
Blade Tip Angle - Rear	90 degrees
Diameter	60.30 in (153.16 cm)
Max Lift Above Ground	17.30 in (43.94 cm)
Max Reach Outside Tires - Left	72.10 in (183.13 cm)
Max Reach Outside Tires - Right	73.70 in (187.20 cm)
Rotation	360 degrees

Dimensions

Blade Base	8.50 ft (2.59 m)
Height to Top of Isomount Cab	11.00 ft (3.35 m)
Overall Length	27.30 ft (8.32 m)
Tandem Axle Wheelbase	5.00 ft (1.52 m)
Wheelbase	19.50 ft (5.94 m)
Width Over Tires	8.00 ft (2.44 m)

Engine

Displacement	640.80 cu in (10,500.85 cu cm)
Max Power	135.00 hp (100.67 kw)
Net Power Gear 5-6	135.00 hp (100.67 kw)
Number of Cylinders	6
Power Measured @	2200 rpm

Front Axle

Ground Clearance	2.10 ft (0.64 m)
Oscillation - Total	32 degrees
Wheel Lean	18 degrees

Hydraulic System

Pump Flow	51.00 gpm (193.04 lpm)
Pump Type	closed-center constant-pressure system w/ variable displacement piston
Relief Valve Pressure	2150 psi

Moldboard

Max Depth of Cut	17.80 in (45.21 cm)
Moldboard Height	24.10 in (61.21 cm)
Moldboard Thickness	0.90 in (2.29 cm)
Moldboard Width	12.00 ft (3.66 m)
Side Shift Left	26.40 in (67.06 cm)
Side Shift Right	20.50 in (52.07 cm)

Operating Specifications

Alternator Supplied Amperage	19 amps
Cooling System Fluid Capacity	12.50 gal (47.31 l)
Fuel Capacity	74.80 gal (283.12 l)
Hydraulic System Fluid Capacity	20.10 gal (76.08 l)
Max Operation Weight - Front Axle	9,987.00 lbs (4,530.03 kg)
Max Operation Weight - Rear Axle	21,605.40 lbs (9,800.06 kg)
Max Operation Weight - Total	31,592.30 lbs (14,330.04 kg)
Oil System Fluid Capacity	7.70 gal (29.14 l)
Operating Voltage	24 volts
Std Operation Weight - Front Axle	7,870.60 lbs (3,570.05 kg)
Std Operation Weight - Rear Axle	20,128.30 lbs (9,130.05 kg)
Std Operation Weight - Total	27,998.80 lbs (12,700.06 kg)
Tandem Case Fluid Capacity (each)	17.00 gal (64.35 l)
Transmission Fluid Capacity	23.00 gal (87.06 l)

Steering System

Articulation Angle	50 degrees
Turning Radius	24.00 ft (7.32 m)

Transmission

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
Transmission Type	Cat-built direct drive power shift

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