Heavy Equipment
Motor Graders
| 12M Motor Grader |
12M Technical Data
Specifications below are provided online by Caterpillar.
| Engine | |
|---|---|
| Base Power (all gears) Net | 118 kW / 158 hp |
| Engine Model | Cat® C6.6 ACERT™ VHP |
| Displacement | 6.6 L / 403 in³ |
| Bore | 105 mm / 4.13 in |
| Stroke | 125 mm / 4.92 in |
| Speed @ rated power | 2000 RPM |
| Number of cylinders | 6 |
| Derating altitude | 3505 m / 11500 ft |
| Std - Fan speed - max | 1150 RPM |
| Std - Fan speed - min | 550 RPM |
| Std - Ambient Capability | 43 ° C / 109 ° F |
| Hi Ambient - Fan speed - max | 1650 RPM |
| Hi Ambient - Fan speed - min | 550 RPM |
| Hi Ambient Capability | 50 ° C / 122 ° F |
| Power Train | |
|---|---|
| Forward/Reverse Gears | 8 Fwd / 6 Rev |
| Transmission | Direct drive, power shift, countershaft |
| Brakes - Service | Multiple oil-disc |
| Brakes - Service, surface area | 23000 cm² / 3565 in² |
| Brakes - Parking | Multiple oil disc |
| Brakes - Secondary | Dual circuit control system |
| Hydraulic System | |
|---|---|
| Circuit type | Electro-hydraulic closed center, load sensing, |
| Pump type | Variable piston |
| Pump output | 193 L/min / 51 gal/min |
| Maximum system pressure | 24100 kPa / 3500 psi |
| Standby Pressure | 3100 kPa / 450 psi |
| Operating Specifications | |
|---|---|
| Top Speed - Fwd. | 44.5 km/h / 27.7 mph |
| Top Speed - Rev. | 37.8 km/h / 23.5 mph |
| Turning radius, outside front tires | 7.46 m / 24.5 ft |
| Steering range - left/right | 47.5° |
| Articulation angle - left/right | 20° |
| Fwd. 1st | 3.9 km/h / 2.4 mph |
| Fwd. 2nd | 5.3 km/h / 3.3 mph |
| Fwd. 3rd | 7.6 km/h / 4.75 mph |
| Fwd. 4th | 10.5 km/h / 6.5 mph |
| Fwd. 5th | 16.4 km/h / 10.2 mph |
| Fwd. 6th | 22.2 km/h / 13.8 mph |
| Fwd. 7th | 30.6 km/h / 19 mph |
| Fwd. 8th | 44.5 km/h / 27.7 mph |
| Rev. 1st | 3.3 km/h / 2 mph |
| Rev. 2nd | 6.2 km/h / 3.8 mph |
| Rev. 3rd | 8.9 km/h / 5.6 mph |
| Rev. 4th | 13.9 km/h / 8.6 mph |
| Rev. 5th | 26 km/h / 16.1 mph |
| Rev. 6th | 37.8 km/h / 23.5 mph |
| Service Refill | |
|---|---|
| Fuel Capacity | 341 L / 90 gal |
| Cooling system | 40 L / 10.4 gal |
| Hydraulic system - tank | 60 L / 16 gal |
| Engine Oil | 15.5 L / 4.1 gal |
| Trans./Diff./Final Drives | 50 L / 13.2 gal |
| Tandem housing (each) | 61 L / 16.9 gal |
| Front wheel spindle bearing housing | .5 L / .1 gal |
| Circle drive housing | 7 L / 1.8 gal |
| Frame | |
|---|---|
| Drawbar - thickness | 9.5 mm / .4 in |
| Drawbar - yoke bar thickness | 19.1 mm / .75 in |
| Drawbar - width | 76.2 mm / 3 in |
| Circle - diameter | 1530 mm / 60.2 in |
| Circle - blade beam thickness | 35 mm / 1.4 in |
| Drawbar - height | 152 mm / 6 in |
| Front axle - height to center | 572 mm / 22.5 in |
| Front axle - wheel lean, left/right | 18° |
| Front axle - total oscillation per side | 32° |
| Tandems | |
|---|---|
| Height | 502 mm / 19.76 in |
| Width | 172 mm / 6.76 in |
| Sidewall thickness - inner | 14 mm / .5 in |
| Sidewall thickness - outer | 16 mm / .6 in |
| Drive chain pitch | 44.5 mm / 1.8 in |
| Wheel axle spacing | 1510 mm / 59.5 in |
| Tandem oscillation - front up | 15° |
| Tandem oscillation - front down | 25° |
| Moldboard | |
|---|---|
| Blade width | 3.7 m / 12 ft |
| Moldboard - height | 609.6 mm / 24 in |
| Moldboard - thickness | 22 mm / .87 in |
| Arc radius | 413 mm / 16.3 in |
| Throat clearance | 124 mm / 4.88 in |
| Cutting edge - width | 152.4 mm / 6 in |
| Cutting edge - thickness | 16 mm / .6 in |
| End Bit - width | 152.4 mm / 6 in |
| End Bit - thickness | 16 mm / .6 in |
| Blade Pull - base GVW | 9448 kg / 20830 lb |
| Blade Pull - max GVW | 11731 kg / 25862 lb |
| Down Pressure - base GVW | 7968 kg / 17566 lb |
| Down Pressure - max GVW | 12816 kg / 28254 lb |
| Blade Range | |
|---|---|
| Circle centershift - right | 656 mm / 25.8 in |
| Circle centershift - left | 656 mm / 25.8 in |
| Moldboard sideshift - right | 660 mm / 26 in |
| Moldboard sideshift - left | 510 mm / 20.1 in |
| Maximum blade position angle | 90° |
| Blade tip range - forward | 40° |
| Blade tip range - backward | 5° |
| Maximum shoulder reach outside of tires - right | 1905 mm / 75 in |
| Maximum shoulder reach outside of tires - left | 1742 mm / 68.6 in |
| Maximum lift above ground | 427 mm / 16.8 in |
| Maximum depth of cut | 720 mm / 28.3 in |
| Ripper | |
|---|---|
| Penetration force | 8578 kg / 18911 lb |
| Pryout force | 11781 kg / 25972 lb |
| Machine length increase, beam raised | 995 mm / 39.2 in |
| Scarifier | |
|---|---|
| Rear: Working width | 2300 mm / 91 in |
| Rear: Scarifier shank holders | 9 |
| Rear: Scarifier shank holder spacing | 267 mm / 10.5 in |
| Weights | |
|---|---|
| Gross Vehicle Weight - base | 14998 kg / 33064 lb |
| Gross Vehicle Weight, max | 20271 kg / 44690 lb |
| Gross Vehicle Wt, max - front axle | 7237 kg / 15954 lb |
| Gross Vehicle Wt, max - rear axle | 13034 kg / 48736 lb |
| Gross Vehicle Wt, base - front axle | 4499 kg / 9919 lb |
| Gross Vehicle Wt, base - rear axle | 10498 kg / 23145 lb |
| Dimensions | |
|---|---|
| Height - top of cab | 3278 mm / 129 in |
| Length - counterweight to ripper | 9889 mm / 389.3 in |
| Width - outside front tires | 2481 mm / 97.7 in |
| Length - front axle to mid tandem | 5915 mm / 232.8 in |
| Length - front tire to rear of machine | 8488 mm / 334.1 in |
| Length - front axle to moldboard | 2511 mm / 98.85 in |
| Length - between tandem axles | 1511 mm / 59.5 in |
| Width - outside rear tires | 2481 mm / 97.7 in |
| Width - tire center lines | 2136 mm / 84.1 in |
| Height - front axle center | 572 mm / 22.5 in |
| Height to exhaust stack | 2855 mm / 112.4 in |
| Height to top of cylinders | 2890 mm / 113.7 in |
| Ground clearance at rear axle | 347 mm / 13.6 in |