12H Motor Grader

Overview & Specifications

Engine

Base Power (1st gear) – Net

144.83 hp

108 kW

Engine Model

Cat® C-9 ETA VHP

Cat® C-9 ETA VHP

VHP - gears 4-8 Net

165 hp

123 kW

VHP Plus - gears 1-3 Net

145 hp

108 kW

VHP Plus - gears 4-6 Net

165 hp

123 kW

VHP Plus - gears 7-8 Net

185 hp

138 kW

Base Power (all gears) Gross

156 hp

116 kW

VHP - gears 1-3 Gross

156 hp

116 kW

VHP - gears 4-8 Gross

176 hp

131 kW

VHP Plus - gears 1-3 Gross

156 hp

116 kW

VHP Plus - gears 4-6 Gross

176 hp

131 kW

VHP Plus - gears 7-8 Gross

196 hp

146 kW

Bore

4.4 in

112 mm

Stroke

5.9 in

149 mm

Speed @ Rated Power

2000 RPM

2000 RPM

Base Power (all gears) – Net

145 hp

108 kW

Maximum Torque

728.71 lb ft

988 N·m

Torque Rise

50%

50%

Displacement

537 in3

8.8 L

VHP - gears 1-3 Net

145 hp

108 kW

Number of Cylinders

6

6

Derating Altitude

10000 ft

3048 m

Standard – Fan Speed – Maximum

1210 RPM

1210 RPM

Standard – Fan Speed – Minimum

500 RPM

500 RPM

High Ambient – Fan Speed – Maximum

1350 RPM

1350 RPM

High Ambient – Fan Speed – Minimum

500 RPM

500 RPM

High Ambient Capability

122 ° F

50 ° C

Power Train

Forward/Reverse Gears

8 fwd / 6 rev

8 fwd / 6 rev

Transmission

Direct drive, power shift

Direct drive, power shift

Brakes – Service

Air actuated multiple oil disc

Air actuated multiple oil disc

Brakes – Service, Surface Area

3712 in2

23948 cm2

Brakes – Parking

Air-actuated, multiple oil-disc

Air-actuated, multiple oil-disc

Brakes – Secondary

Dual circuit

Dual circuit

Hydraulic System

Circuit Type

Closed center load sense

Closed center load sense

Pump Type

Variable piston

Variable piston

Pump Output

51.9 gal/min

196 L/min

Maximum System Pressure

3500 psi

24150 kPa

Reservoir tank capacity

10.04 gal

38 L

Standby Pressure

450 psi

3100 kPa

Operating Specifications

Top Speed – Forward

27.4 mph

44 km/h

Top Speed – Reverse

21.6 mph

34.7 km/h

Turning Radius, Outside Front Tires

24.25 ft

7.4 m

Steering Range – Left/Right

50 degrees

50 degrees

Articulation Angle – Left/Right

20 degrees

20 degrees

Forward – 1st

2.3 mph

3.8 km/h

Forward – 2nd

3.2 mph

5.1 km/h

Forward – 3rd

4.6 mph

7.4 km/h

Forward – 4th

6.4 mph

10.3 km/h

Forward – 5th

10 mph

16.2 km/h

Forward – 6th

13.7 mph

22 km/h

Forward – 7th

18.8 mph

30.3 km/h

Forward – 8th

27.4 mph

44 km/h

Reverse – 1st

1.8 mph

3 km/h

Reverse – 2nd

3.5 mph

5.6 km/h

Reverse – 3rd

5 mph

8.1 km/h

Reverse – 4th

7.9 mph

12.8 km/h

Reverse – 5th

14.8 mph

23.9 km/h

Reverse – 6th

21.6 mph

34.7 km/h

Service Refill

Fuel Capacity

100 gal

378 L

Cooling System

11.6 gal

44 L

Hydraulic System – Total

19.5 gal

74 L

Hydraulic System – Tank

9.9 gal

38 L

Engine Oil

6.3 gal

24 L

Transmission/Differential/Final Drives

12.2 gal

47 L

Tandem Housing (each)

16.9 gal

64 L

Front Wheel Spindle Bearing Housing

0.13 gal

0.5 L

Circle Drive Housing

1.8 gal

7 L

Frame

Circle – Diameter

60.2 in

1530 mm

Circle – Blade Beam Thickness

1.2 in

30 mm

Drawbar – Height

5 in

127 mm

Front-Top/Bottom Plate – Width

12 in

305 mm

Front-Top/Bottom Plate – Thickness

1 in

25 mm

Front-Side Plates – Width

9.5 in

242 mm

Front-Side Plates – Thickness

0.5 in

12 mm

Front-linear weights - min

112 lb/ft

165 kg/m

Front-linear weights - max

144 lb/ft

213 kg/m

Front-section modulus - min

127 in3

2083 cm3

Front-section modulus - max

291 in3

4785 cm3

Front Axle – Height to Center

23.75 in

608 mm

Front Axle – Wheel Lean, Left/Right

18°

18°

Front Axle – Total Oscillation per Side

32°

32°

Tandems

Height

19.9 in

506 mm

Width

7.9 in

201 mm

Sidewall Thickness – Inner

0.63 in

16 mm

Sidewall Thickness – Outer

0.71 in

18 mm

Drive Chain Pitch

2 in

51 mm

Wheel Axle Spacing

60 in

1522 mm

Tandem Oscillation – Front Up

15°

15°

Tandem Oscillation – Front Down

25°

25°

Moldboard

Blade Width

12 ft

3.658 m

Moldboard – Height

24 in

610 mm

Moldboard – Thickness

0.87 in

22 mm

Arc Radius

16.25 in

413 mm

Throat Clearance

4.7 in

120 mm

Cutting Edge – Width

6 in

152 mm

Cutting Edge – Thickness

0.63 in

16 mm

End Bit – Width

6 in

152 mm

End Bit – Thickness

0.63 in

16 mm

Blade Pull – Base GVW

20677 lb

9379 kg

Blade Pull – Maximum GVW

28867 lb

13094 kg

Blade Down Pressure – Base GVW

14447 lb

6555 kg

Blade Down Pressure – Max GVW

23800 lb

10799 kg

Blade Range

Circle Centershift – Right

28.7 in

728 mm

Circle Centershift – Left

27.4 in

695 mm

Moldboard Sideshift – Right

26 in

660 mm

Moldboard Sideshift – Left

20.6 in

524 mm

Maximum Blade Position Angle

90°

90°

Blade Tip Range – Forward

40°

40°

Blade Tip Range – Backward

5°

5°

Maximum Shoulder Reach Outside of Tires – Right

71.2 in

1809 mm

Maximum Shoulder Reach Outside of Tires – Left

73.6 in

1859 mm

Maximum Lift above Ground

18.9 in

480 mm

Maximum Depth of Cut

28.9 in

735 mm

Ripper

Ripping Depth – Maximum

18.2 in

462 mm

Ripper Shank Holders

5

5

Shank Holder Spacing – Minimum

21 in

533 mm

Penetration Force

17740 lb

8047 kg

Pryout Force

20460 lb

9281 kg

Machine Length Increase, Beam Raised

38.2 in

970 mm

Scarifier

Front, V-Type – Scarifier shank holder spacing

4.6 in

116 mm

Front, V-Type – Scarifier shank holders

11

11

Front, V-Type – Scarifying depth, maximum

11.5 in

292 mm

Front, V-Type: Working width

46.6 in

1184 mm

Front, straight: Working width

71 in

1800 mm

Front, straight: Scarfying depth, maximum

12.5 in

317 mm

Front, straight: Scarifier shank holders

17

17

Front, straight: Scarifier shank holder spacing

4.38 in

111 mm

Rear – Working Width

91 in

2300 mm

Rear – Scarifier Shank Holders

9

9

Rear – Scarifier Shank Holder Spacing

10.5 in

267 mm

Weights

Gross Vehicle Weight – Maximum – Front Axle

13744 lb

6234 kg

Gross Vehicle Weight – Maximum – Rear Axle

32074 lb

14549 kg

Gross Vehicle Weight – Base – Front Axle

8346 lb

3784 kg

Gross Vehicle Weight – Base – Rear Axle

22974 lb

10416 kg

Gross Vehicle Weight – Maximum – Total

45818 lb

20783 kg

Gross Vehicle Weight – Base – Total

31320 lb

14200 kg

Dimensions

Height – Top of Cab

122 in

3107 mm

Height - high profile cab

131 in

3332 mm

Height - no cab

122 in

3090 mm

Length - counterweight to ripper

394.2 in

10012 mm

Width – Outside Front Tires

96 in

2440 mm

Length – Front Axle to Mid Tandem

239.6 in

6086 mm

Length – Front Tire to Rear of Machine

337.4 in

8571 mm

Length – Front Axle to Moldboard

101.3 in

2575 mm

Length – Between Tandem Axles

60 in

1523 mm

Width – Outside Rear Tires

95.3 in

2422 mm

Width – Tire Center Lines

81.8 in

2077 mm

Height – Front Axle Center

23.4 in

594 mm

Height to Exhaust Stack

122 in

3090 mm

Height to Top of Cylinders

119 in

3030 mm

Ground Clearance at Rear Axle

13.4 in

341.5 mm