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Caterpillar 12H Motor Grader

The 12H blends productivity and durability to give you the best return on your investment. The CatŪ C-9 engine, direct-drive power shift transmission and load-sensing hydraulics are perfectly balanced, working together to deliver top productivity in all applications.


View/Download Product Brochure (PDF)


Overview &
Specifications		Features
& Benefits		Standard
Equipment		Optional
Equipment		Work Tools &
Attachments		 

Engine
Base Power (all gears) Net145 hp / 108 kW
VHP - gears 1-3 Net145 hp / 108 kW
VHP - gears 4-8 Net165 hp / 123 kW
VHP Plus - gears 1-3 Net145 hp / 108 kW
VHP Plus - gears 4-6 Net165 hp / 123 kW
VHP Plus - gears 7-8 Net185 hp / 138 kW
Base Power (all gears) Gross156 hp / 116 kW
VHP - gears 1-3 Gross156 hp / 116 kW
VHP - gears 4-8 Gross176 hp / 131 kW
VHP Plus - gears 1-3 Gross156 hp / 116 kW
VHP Plus - gears 4-6 Gross176 hp / 131 kW
VHP Plus - gears 7-8 Gross196 hp / 146 kW
Engine ModelCatŪ C-9 ETA VHP
Displacement537 in3 / 8.8 L
Bore4.4 in / 112 mm
Stroke5.9 in / 149 mm
Speed @ rated power2000 RPM
Number of cylinders6
Derating altitude10000 ft / 3048 m
Std - Fan speed - max1210 RPM
Std - Fan speed - min500 RPM
Hi Ambient - Fan speed - max1350 RPM
Hi Ambient - Fan speed - min500 RPM
Hi Ambient Capability122 ° F / 50 ° C

Weights
Gross Vehicle Weight - base31320 lb / 14200 kg
Gross Vehicle Weight, max45818 lb / 20783 kg
Gross Vehicle Wt, max - front axle13744 lb / 6234 kg
Gross Vehicle Wt, max - rear axle32074 lb / 14549 kg
Gross Vehicle Wt, base - front axle8346 lb / 3784 kg
Gross Vehicle Wt, base - rear axle22974 lb / 10416 kg

Moldboard
Blade width12 ft / 3.658 m
Moldboard - height24 in / 610 mm
Moldboard - thickness.87 in / 22 mm
Arc radius16.25 in / 413 mm
Throat clearance4.7 in / 120 mm
Cutting edge - width6 in / 152 mm
Cutting edge - thickness.63 in / 16 mm
End Bit - width6 in / 152 mm
End Bit - thickness.63 in / 16 mm
Blade Pull - base GVW20677 lb / 9379 kg
Blade Pull - max GVW28867 lb / 13094 kg
Down Pressure - base GVW14447 lb / 6555 kg
Down Pressure - max GVW23800 lb / 10799 kg

Operating Specifications
Top Speed - Fwd.27.4 mph / 44 km/h
Top Speed - Rev.21.6 mph / 34.7 km/h
Turning radius, outside front tires24.25 ft / 7.4 m
Steering range - left/right50 degrees
Articulation angle - left/right20 degrees
Fwd. 1st2.3 mph / 3.8 km/h
Fwd. 2nd3.2 mph / 5.1 km/h
Fwd. 3rd4.6 mph / 7.4 km/h
Fwd. 4th6.4 mph / 10.3 km/h
Fwd. 5th10 mph / 16.2 km/h
Fwd. 6th13.7 mph / 22 km/h
Fwd. 7th18.8 mph / 30.3 km/h
Fwd. 8th27.4 mph / 44 km/h
Rev. 1st1.8 mph / 3 km/h
Rev. 2nd3.5 mph / 5.6 km/h
Rev. 3rd5 mph / 8.1 km/h
Rev. 4th7.9 mph / 12.8 km/h
Rev. 5th14.8 mph / 23.9 km/h
Rev. 6th21.6 mph / 34.7 km/h

Service Refill
Fuel Capacity100 gal / 378 L
Cooling system11.6 gal / 44 L
Hydraulic system - total19.5 gal / 74 L
Hydraulic system - tank9.9 gal / 38 L
Engine Oil6.3 gal / 24 L
Trans./Diff./Final Drives12.2 gal / 47 L
Tandem housing (each)16.9 gal / 64 L
Front wheel spindle bearing housing.13 gal / .5 L
Circle drive housing1.8 gal / 7 L

Power Train
Forward/Reverse Gears8 fwd / 6 rev
TransmissionDirect drive, power shift
Brakes - ServiceAir actuated multiple oil disc
Brakes - Service, surface area3712 in2 / 23948 cm2
Brakes - ParkingAir-actuated, multiple oil-disc
Brakes - SecondaryDual circuit

Hydraulic System
Circuit typeClosed center load sense
Pump typeVariable piston
Pump output51.9 gal/min / 196 L/min
Maximum system pressure3500 psi / 24150 kPa
Reservoir tank capacity10.04 gal / 38 L
Standby Pressure450 psi / 3100 kPa

Frame
Circle - diameter60.2 in / 1530 mm
Circle - blade beam thickness1.2 in / 30 mm
Drawbar - height5 in / 127 mm
Front-top/bottom plate - width12 in / 305 mm
Front-top/bottom plate - thickness1 in / 25 mm
Front-side plates - width9.5 in / 242 mm
Front-side plates - thickness.5 in / 12 mm
Front-linear weights - min112 lb/ft / 165 kg/m
Front-linear weights - max144 lb/ft / 213 kg/m
Front-section modulus - min127 in3 / 2083 cm3
Front-section modulus - max291 in3 / 4785 cm3
Front axle - height to center23.75 in / 608 mm
Front axle - wheel lean, left/right18°
Front axle - total oscillation per side32°

Blade Range
Circle centershift - right28.7 in / 728 mm
Circle centershift - left27.4 in / 695 mm
Moldboard sideshift - right26 in / 660 mm
Moldboard sideshift - left20.6 in / 524 mm
Maximum blade position angle90°
Blade tip range - forward40°
Blade tip range - backward5°
Maximum shoulder reach outside of tires - right71.2 in / 1809 mm
Maximum shoulder reach outside of tires - left73.6 in / 1859 mm
Maximum lift above ground18.9 in / 480 mm
Maximum depth of cut28.9 in / 735 mm

Ripper
Ripping depth, maximum18.2 in / 462 mm
Ripper shank holders5
Shank holder spacing - min21 in / 533 mm
Penetration force17740 lb / 8047 kg
Pryout force20460 lb / 9281 kg
Machine length increase, beam raised38.2 in / 970 mm

Scarifier
Front, straight: Working width71 in / 1800 mm
Front, straight: Scarfying depth, maximum12.5 in / 317 mm
Front, straight: Scarifier shank holders17
Front, straight: Scarifier shank holder spacing4.38 in / 111 mm
Rear: Working width91 in / 2300 mm
Rear: Scarifier shank holders9
Rear: Scarifier shank holder spacing10.5 in / 267 mm

Tandems
Height19.9 in / 506 mm
Width7.9 in / 201 mm
Sidewall thickness - inner.63 in / 16 mm
Sidewall thickness - outer.71 in / 18 mm
Drive chain pitch2 in / 51 mm
Wheel axle spacing60 in / 1522 mm
Tandem oscillation - front up15°
Tandem oscillation - front down25°

Dimensions
Height - top of cab122 in / 3107 mm
Height - high profile cab131 in / 3332 mm
Height - no cab122 in / 3090 mm
Length - counterweight to ripper394.2 in / 10012 mm
Width - outside front tires96 in / 2440 mm
Length - front axle to mid tandem239.6 in / 6086 mm
Length - front tire to rear of machine337.4 in / 8571 mm
Length - front axle to moldboard101.3 in / 2575 mm
Length - between tandem axles60 in / 1523 mm
Width - outside rear tires95.3 in / 2422 mm
Width - tire center lines81.8 in / 2077 mm
Height - front axle center23.4 in / 594 mm
Height to exhaust stack122 in / 3090 mm
Height to top of cylinders119 in / 3030 mm
Ground clearance at rear axle13.4 in / 341.5 mm

 
INDIANA'S LEADING EQUIPMENT DEALER

MacAllister Machinery has 14 convenient locations throughout Indiana: Beech Grove, Bloomington, Fishers, Fort Wayne, Greensburg, Indianapolis (HQ, Power Systems), Indianapolis (West), Lafayette, Muncie, Richmond, South Bend, Terre Haute, and Washington.

Headquarters: 7515 E 30th St, Indianapolis, IN 46219
Phone: (317) 545-2151  In-State Toll Free: (800) 382-1896  Out of State Toll Free: (800) 227-3228