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Caterpillar 12G Motor Grader


Blade Tip Angle - Front90 °
Blade Tip Angle - Rear90 °
Diameter60.3 in (153 cm)
Max Lift Above Ground17.3 in (44 cm)
Max Reach Outside Tires - Left72.1 in (183 cm)
Max Reach Outside Tires - Right73.7 in (187 cm)
Rotation360 °


Blade Base8.5 ft (3 m)
Height to Top of Isomount Cab11 ft (3 m)
Overall Length27.3 ft (8 m)
Tandem Axle Wheelbase5 ft (2 m)
Wheelbase19.5 ft (6 m)
Width Over Tires8 ft (2 m)


Displacement640.8 cu in (0 m)
Max Power135 hp (101 kw)
Net Power Gear 5-6135 hp (101 kw)
Number of Cylinders6
Power Measured @2200 rpm

Front Axle

Ground Clearance2.1 ft (1 m)
Oscillation - Total32 °
Wheel Lean18 °

Hydraulic System

Pump Flow51 gal/min (193 l/min)
Pump Typeclosed-center, constant-pressure system w/ variable displacement piston
Relief Valve Pressure2150 psi


Max Depth of Cut17.8 in (45 cm)
Moldboard Height24.1 in (61 cm)
Moldboard Thickness0.9 in (2 cm)
Moldboard Width12 ft (4 m)
Side Shift Left26.4 in (67 cm)
Side Shift Right20.5 in (52 cm)

Operating Specifications

Alternator Supplied Amperage19 A
Cooling System Fluid Capacity12.5 gal (47 l)
Fuel Capacity74.8 gal (283 l)
Hydraulic System Fluid Capacity20.1 gal (76 l)
Max Operation Weight - Front Axle9987 lbs (4,530 kg)
Max Operation Weight - Rear Axle21605.4 lbs (9,800 kg)
Max Operation Weight - Total31592.3 lbs (14,330 kg)
Oil System Fluid Capacity7.7 gal (29 l)
Operating Voltage24 V V
Std Operation Weight - Front Axle7870.6 lbs (3,570 kg)
Std Operation Weight - Rear Axle20128.3 lbs (9,130 kg)
Std Operation Weight - Total27998.8 lbs (12,700 kg)
Tandem Case Fluid Capacity (each)17 gal (64 l)
Transmission Fluid Capacity23 gal (87 l)

Steering System

Articulation Angle50 °
Turning Radius24 ft (7 m)


Max Speed - Forward25.5 mph (41 kph)
Max Speed - Reverse25.5 mph (41 kph)
Number of Gears - Forward6
Number of Gears - Reverse6
Transmission TypeCat-built direct drive power shift
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    39.04690 \\ -77.49030 \\ Ashburn \\ VA