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Caterpillar 12H Motor Grader
Caterpillar 12H Motor GraderThe 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. |  |  |
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| Base Power (all gears) Net | 145 hp / 108 kW |
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| VHP - gears 1-3 Net | 145 hp / 108 kW |
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| VHP - gears 4-8 Net | 165 hp / 123 kW |
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| VHP Plus - gears 1-3 Net | 145 hp / 108 kW |
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| VHP Plus - gears 4-6 Net | 165 hp / 123 kW |
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| VHP Plus - gears 7-8 Net | 185 hp / 138 kW |
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| Base Power (all gears) Gross | 156 hp / 116 kW |
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| VHP - gears 1-3 Gross | 156 hp / 116 kW |
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| VHP - gears 4-8 Gross | 176 hp / 131 kW |
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| VHP Plus - gears 1-3 Gross | 156 hp / 116 kW |
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| VHP Plus - gears 4-6 Gross | 176 hp / 131 kW |
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| VHP Plus - gears 7-8 Gross | 196 hp / 146 kW |
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| Engine Model | CatŪ C-9 ETA VHP |
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| Displacement | 537 in3 / 8.8 L |
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| Bore | 4.4 in / 112 mm |
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| Stroke | 5.9 in / 149 mm |
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| Speed @ rated power | 2000 RPM |
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| Number of cylinders | 6 |
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| Derating altitude | 10000 ft / 3048 m |
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| Std - Fan speed - max | 1210 RPM |
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| Std - Fan speed - min | 500 RPM |
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| Hi Ambient - Fan speed - max | 1350 RPM |
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| Hi Ambient - Fan speed - min | 500 RPM |
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| Hi Ambient Capability | 122 ° F / 50 ° C |
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| Gross Vehicle Weight - base | 31320 lb / 14200 kg |
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| Gross Vehicle Weight, max | 45818 lb / 20783 kg |
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| Gross Vehicle Wt, max - front axle | 13744 lb / 6234 kg |
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| Gross Vehicle Wt, max - rear axle | 32074 lb / 14549 kg |
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| Gross Vehicle Wt, base - front axle | 8346 lb / 3784 kg |
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| Gross Vehicle Wt, base - rear axle | 22974 lb / 10416 kg |
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| Blade width | 12 ft / 3.658 m |
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| Moldboard - height | 24 in / 610 mm |
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| Moldboard - thickness | .87 in / 22 mm |
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| Arc radius | 16.25 in / 413 mm |
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| Throat clearance | 4.7 in / 120 mm |
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| Cutting edge - width | 6 in / 152 mm |
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| Cutting edge - thickness | .63 in / 16 mm |
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| End Bit - width | 6 in / 152 mm |
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| End Bit - thickness | .63 in / 16 mm |
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| Blade Pull - base GVW | 20677 lb / 9379 kg |
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| Blade Pull - max GVW | 28867 lb / 13094 kg |
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| Down Pressure - base GVW | 14447 lb / 6555 kg |
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| Down Pressure - max GVW | 23800 lb / 10799 kg |
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| Top Speed - Fwd. | 27.4 mph / 44 km/h |
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| Top Speed - Rev. | 21.6 mph / 34.7 km/h |
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| Turning radius, outside front tires | 24.25 ft / 7.4 m |
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| Steering range - left/right | 50 degrees |
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| Articulation angle - left/right | 20 degrees |
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| Fwd. 1st | 2.3 mph / 3.8 km/h |
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| Fwd. 2nd | 3.2 mph / 5.1 km/h |
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| Fwd. 3rd | 4.6 mph / 7.4 km/h |
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| Fwd. 4th | 6.4 mph / 10.3 km/h |
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| Fwd. 5th | 10 mph / 16.2 km/h |
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| Fwd. 6th | 13.7 mph / 22 km/h |
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| Fwd. 7th | 18.8 mph / 30.3 km/h |
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| Fwd. 8th | 27.4 mph / 44 km/h |
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| Rev. 1st | 1.8 mph / 3 km/h |
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| Rev. 2nd | 3.5 mph / 5.6 km/h |
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| Rev. 3rd | 5 mph / 8.1 km/h |
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| Rev. 4th | 7.9 mph / 12.8 km/h |
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| Rev. 5th | 14.8 mph / 23.9 km/h |
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| Rev. 6th | 21.6 mph / 34.7 km/h |
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| Fuel Capacity | 100 gal / 378 L |
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| Cooling system | 11.6 gal / 44 L |
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| Hydraulic system - total | 19.5 gal / 74 L |
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| Hydraulic system - tank | 9.9 gal / 38 L |
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| Engine Oil | 6.3 gal / 24 L |
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| Trans./Diff./Final Drives | 12.2 gal / 47 L |
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| Tandem housing (each) | 16.9 gal / 64 L |
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| Front wheel spindle bearing housing | .13 gal / .5 L |
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| Circle drive housing | 1.8 gal / 7 L |
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| Forward/Reverse Gears | 8 fwd / 6 rev |
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| Transmission | Direct drive, power shift |
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| Brakes - Service | Air actuated multiple oil disc |
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| Brakes - Service, surface area | 3712 in2 / 23948 cm2 |
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| Brakes - Parking | Air-actuated, multiple oil-disc |
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| Brakes - Secondary | Dual circuit |
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| Circuit type | Closed center load sense |
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| Pump type | Variable piston |
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| Pump output | 51.9 gal/min / 196 L/min |
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| Maximum system pressure | 3500 psi / 24150 kPa |
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| Reservoir tank capacity | 10.04 gal / 38 L |
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| Standby Pressure | 450 psi / 3100 kPa |
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| Circle - diameter | 60.2 in / 1530 mm |
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| Circle - blade beam thickness | 1.2 in / 30 mm |
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| Drawbar - height | 5 in / 127 mm |
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| Front-top/bottom plate - width | 12 in / 305 mm |
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| Front-top/bottom plate - thickness | 1 in / 25 mm |
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| Front-side plates - width | 9.5 in / 242 mm |
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| Front-side plates - thickness | .5 in / 12 mm |
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| Front-linear weights - min | 112 lb/ft / 165 kg/m |
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| Front-linear weights - max | 144 lb/ft / 213 kg/m |
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| Front-section modulus - min | 127 in3 / 2083 cm3 |
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| Front-section modulus - max | 291 in3 / 4785 cm3 |
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| Front axle - height to center | 23.75 in / 608 mm |
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| Front axle - wheel lean, left/right | 18° |
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| Front axle - total oscillation per side | 32° |
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| Circle centershift - right | 28.7 in / 728 mm |
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| Circle centershift - left | 27.4 in / 695 mm |
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| Moldboard sideshift - right | 26 in / 660 mm |
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| Moldboard sideshift - left | 20.6 in / 524 mm |
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| Maximum blade position angle | 90° |
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| Blade tip range - forward | 40° |
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| Blade tip range - backward | 5° |
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| Maximum shoulder reach outside of tires - right | 71.2 in / 1809 mm |
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| Maximum shoulder reach outside of tires - left | 73.6 in / 1859 mm |
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| Maximum lift above ground | 18.9 in / 480 mm |
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| Maximum depth of cut | 28.9 in / 735 mm |
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| Ripping depth, maximum | 18.2 in / 462 mm |
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| Ripper shank holders | 5 |
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| Shank holder spacing - min | 21 in / 533 mm |
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| Penetration force | 17740 lb / 8047 kg |
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| Pryout force | 20460 lb / 9281 kg |
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| Machine length increase, beam raised | 38.2 in / 970 mm |
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| Front, straight: Working width | 71 in / 1800 mm |
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| Front, straight: Scarfying depth, maximum | 12.5 in / 317 mm |
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| Front, straight: Scarifier shank holders | 17 |
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| Front, straight: Scarifier shank holder spacing | 4.38 in / 111 mm |
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| Rear: Working width | 91 in / 2300 mm |
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| Rear: Scarifier shank holders | 9 |
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| Rear: Scarifier shank holder spacing | 10.5 in / 267 mm |
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| Height | 19.9 in / 506 mm |
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| Width | 7.9 in / 201 mm |
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| Sidewall thickness - inner | .63 in / 16 mm |
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| Sidewall thickness - outer | .71 in / 18 mm |
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| Drive chain pitch | 2 in / 51 mm |
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| Wheel axle spacing | 60 in / 1522 mm |
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| Tandem oscillation - front up | 15° |
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| Tandem oscillation - front down | 25° |
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| Height - top of cab | 122 in / 3107 mm |
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| Height - high profile cab | 131 in / 3332 mm |
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| Height - no cab | 122 in / 3090 mm |
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| Length - counterweight to ripper | 394.2 in / 10012 mm |
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| Width - outside front tires | 96 in / 2440 mm |
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| Length - front axle to mid tandem | 239.6 in / 6086 mm |
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| Length - front tire to rear of machine | 337.4 in / 8571 mm |
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| Length - front axle to moldboard | 101.3 in / 2575 mm |
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| Length - between tandem axles | 60 in / 1523 mm |
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| Width - outside rear tires | 95.3 in / 2422 mm |
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| Width - tire center lines | 81.8 in / 2077 mm |
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| Height - front axle center | 23.4 in / 594 mm |
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| Height to exhaust stack | 122 in / 3090 mm |
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| Height to top of cylinders | 119 in / 3030 mm |
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| Ground clearance at rear axle | 13.4 in / 341.5 mm |
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