18 Motor Grader
More power, more efficiency, improved emissions control and a wider moldboard help the Cat® 18 rise up to the challenge of mining operations. Technologies assist the operator and work to minimize operating costs. And, Cat durability helps ensure peak availability.
Specifications
Equipment
Product Brochures
Attachments
Units:
Engine
Base Power (1st Gear) - Net
304 hp
227 kW
Engine Model
Cat® C13
Bore
5.1 in
130 mm
Stroke
6.2 in
157 mm
Speed at Rated Power
2,000 rpm
Standard - Ambient Capability
122 °F
50 °C
Base Power (1st Gear) - Net - Metric
309 hp
227 kW
VHP Range - Net
227-266 kW (304-357 hp)
Maximum Torque - ISO 9249 - Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent
1270 lb/ft
1721 N·m
Derating Altitude - Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent
12176 ft
3711 m
Derating Altitude - Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent
12973 ft
3954 m
Maximum Torque - ISO 9249 - Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent
1270 lb/ft
1721 N·m
Standard - Fan Speed - Minimum
550 rpm
Emissions (1)
U.S. EPA Tier 4 Final/EU Stage V/Japan 2014 (Tier 4 Final)
Torque Rise - Tier 4/Stage IV/Japan 2014 (Tier 4 Final)
40%
Maximum Torque - ISO 9249 - Tier 4/Stage IV/Japan 2014 (Tier 4 Final)
1306 lb/ft
1771 N·m
Derating Altitude - Tier 4/Stage IV/Japan 2014 (Tier 4 Final)
12500 ft
3810 m
Torque Rise - Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent
38%
Standard - Fan Speed - Maximum
1,450 rpm
Emissions (2)
Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent Emission Standards
Torque Rise - Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent
38%
VHP Range - Net - Metric
227-266 kW (309-362 hp)
Emissions (3)
Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards
Displacement
763 in³
12.5 l
Number of Cylinders
6
Weights
Operating Weight - Typically Equipped
74324 lb
33713 kg
Power Train
Forward/Reverse Gears
8 Forward/6 Reverse
Transmission
Direct drive, power shift, countershaft
Brakes - Parking
Spring applied, hydraulically released
Brakes - Dynamic Brake Torque per Wheel
27069.27 lb/ft
36701 N·m
Brakes - Service
Oil-actuated, oil disc
Brakes - Secondary
Oil-actuated, oil-disc
Moldboard
Blade Width
18 ft
5.5 m
Hydraulic System
Circuit Type
Electro-hydraulic load sensing, closed center
Pump Type
Variable piston
Maximum System Pressure
3590 psi
24750 kPa
Standby Pressure
856 psi
5900 kPa
Pump Output*
74 gal/min
280 l/min
Note
*Pump output measured at 2,150 rpm.
Operating Specifications
Forward - 6th
16 mile/h
25.8 km/h
Forward - 2nd
3.8 mile/h
6.1 km/h
Forward - 8th
32.1 mile/h
51.7 km/h
Forward - 5th
11.8 mile/h
19 km/h
Reverse - 3rd
6 mile/h
9.7 km/h
Turning Radius - Outside Front Tires
30.5 ft
9.3 m
Forward - 4th
7.6 mile/h
12.3 km/h
Top Speed - Reverse
25.3 mile/h
40.8 km/h
Forward - 7th
22 mile/h
35.5 km/h
Articulation Angle - Left/Right
20°
Reverse - 1st
2.2 mile/h
3.6 km/h
Forward - 3rd
5.5 mile/h
8.9 km/h
Reverse - 4th
9.3 mile/h
15 km/h
Forward - 1st
2.8 mile/h
4.5 km/h
Top Speed - Forward
32.1 mile/h
51.7 km/h
Reverse - 6th
25.3 mile/h
40.8 km/h
Steering Range - Left/Right
47.5°
Reverse - 2nd
4.1 mile/h
6.6 km/h
Reverse - 5th
17.4 mile/h
28 km/h
Service Refill
Fuel Capacity
131 gal (US)
496 l
Cooling System
18.5 gal (US)
70 l
Hydraulic System - Tank
18.5 gal (US)
70 l
Hydraulic System - Total
38.6 gal (US)
146 l
DEF Tank
4.2 gal (US)
16 l
Engine Oil
9.5 gal (US)
36 l
Transmission - Differential - Final Drives
26 gal (US)
98.5 l
Tandem Housing - Each
34 gal (US)
129 l
Front Wheel Spindle Bearing Housing
0.24 gal (US)
0.9 l
Circle Drive Housing
2.6 gal (US)
10 l
Frame
Front Frame Structure - Width
14 in
356 mm
Front Axle - Height to Center
26.4 in
670 mm
Circle - Diameter
71.7 in
1822 mm
Front Frame Structure - Thickness
0.6 in
14 mm
Front Frame Structure - Height
18.1 in
460 mm
Circle - Blade Beam Thickness
2 in
50 mm
Drawbar - Width
3 in
76 mm
Front Axle - Wheel Lean
18° Left/17° Right
Front Axle - Total Oscillation per Side
35°
Drawbar - Height
8 in
203 mm
Tandems
Sidewall Thickness - Outer
0.9 in
22 mm
Sidewall Thickness - Inner
0.9 in
22 mm
Tandem Oscillation - Front Up
15°
Tandem Oscillation - Front Down
25°
Height
25.5 in
648 mm
Width
9.3 in
236 mm
Drive Chain Pitch
2.5 in
63.5 mm
Wheel Axle Spacing
72.5 in
1841 mm
Moldboard
Arc Radius
16.3 in
413 mm
Throat Clearance
5 in
126 mm
Down Force - Maximum GVW
43861 lb
19895 kg
Blade Pull* - Base GVW
47216 lb
21417 kg
Blade Pull* - Maximum GVW
52878 lb
23985 kg
End Bit - Width
6 in
152 mm
Down Force - Base GVW
34008 lb
15426 kg
Cutting Edge Thickness
1.4 in
35 mm
Thickness
1 in
25 mm
Width
18 ft
5.5 m
Cutting Edge Width
10 in
254 mm
End Bit - Thickness
0.75 in
19 mm
Height
31 in
787 mm
Blade Range
Maximum Blade Position Angle
65°
Maximum Lift Above Ground
15.7 in
400 mm
Maximum Depth of Cut
18.5 in
470 mm
Maximum Shoulder Reach Outside of Tires - Right
103 in
2605 mm
Circle Centershift - Right
22 in
560 mm
Maximum Shoulder Reach Outside of Tires - Left
103 in
2605 mm
Moldboard Sideshift - Right
31.1 in
790 mm
Blade Tip Range - Backward
5°
Moldboard Sideshift - Left
29.1 in
740 mm
Circle Centershift - Left
27.2 in
690 mm
Blade Tip Range - Forward
40°
Ripper
Shank Holder Spacing - Minimum
17.5 in
445 mm
Ripping Depth - Maximum
17.8 in
452 mm
Ripper Shank Holders
7
Penetration Force
30311 lb
13749 kg
Pry-Out Force
43700 lb
19822 kg
Machine Length Increase, Beam Raised
63.4 in
1610 mm
Weights Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final)*
Gross Vehicle Weight - Typically Equipped - Rear Axle
53830 lb
24417 kg
Gross Vehicle Weight - Base** - Total
72298 lb
32794 kg
Gross Vehicle Weight - Maximum Tested - Rear Axle
58753 lb
26650 kg
Gross Vehicle Weight - Maximum Tested - Front Axle
26125 lb
11850 kg
Gross Vehicle Weight - Typically Equipped - Front Axle
20494 lb
9296 kg
Gross Vehicle Weight - Base** - Front Axle
19837 lb
8998 kg
Gross Vehicle Weight - Maximum Tested - Total
84877 lb
38500 kg
Gross Vehicle Weight - Typically Equipped - Total
74324 lb
33713 kg
Gross Vehicle Weight - Base** - Rear Axle
52461 lb
23796 kg
Dimensions (Approximate)
Height - Top of Cylinders
122.6 in
3115 mm
Width - Outside Rear Tires
134.3 in
3411 mm
Height - Exhaust Stack
141.1 in
3584 mm
Length - Between Tandem Axles
72.5 in
1841 mm
Length - Front Axle to Mid Tandem
290 in
7365 mm
Width - Tire Center Lines
106.4 in
2703 mm
Length - Front Axle to Moldboard
120.7 in
3066 mm
Length - Counterweight to Ripper
474.4 in
12051 mm
Height - Front Axle Center
29.9 in
760 mm
Width - Outside Front Tires
134.3 in
3411 mm
Length - Front Tire to Rear of Machine - Including Tow Hitch
417 in
10593 mm
Height - Top of Cab
147.5 in
3746 mm
Ground Clearance - Rear Axle
16.7 in
423 mm
Standards
Sound
ISO 6394: 2008/ISO 6395: 2008/ISO 6396: 2008
ROPS/FOPS
ISO 3471: 2008/ISO 3449: 2005
Brakes
ISO 3450: 2011
Steering
ISO 5010: 2007
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Metric
Gear - Forward 1st
309 hp
227 kW
Optional Tire Arrangements
Wheel Group - 19.5×25 MP (2)
Tires: 23.5R25 Bridgestone VKT 1 Star
Engine
Optimized VHP Range - Net
227-266 kW (304-357 hp)
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Net
Gear - Forward 4th
321 hp
239 kW
Gear - Reverse 2nd
304 hp
227 kW
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Metric
Gear - Forward 2nd
309 hp
227 kW
Gear - Reverse 2nd
309 hp
227 kW
Gear - Forward 4th
325 hp
239 kW
Gear - Forward 6th
341 hp
251 kW
Optional Tire Arrangements
Wheel Group - 19.5×25 MP (1)
Tires: 23.5R25 Bridgestone VKT 2 Star
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Net
Gear - Forward 1st
304 hp
227 kW
Gear - Reverse 3rd-6th
311 hp
232 kW
Gear - Forward 3rd
311 hp
232 kW
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Metric
Gear - Forward 5th
332 hp
244 kW
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Net
Gear - Forward 5th
327 hp
244 kW
Gear - Forward 7th
342 hp
255 kW
Optional Tire Arrangements
Wheel Group - 19.5×25 MP (3)
Tires: 23.5R25 Bridgestone VJT 1 Star
Ripper
Shank Holder Spacing - Maximum
20 in
500 mm
Weights Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final)*
Note (2)
**Base operating weight calculated on standard machine configuration with 23.5R25 tires, full fuel tank operator and rops cab.
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Net
Gear - Forward 2nd
304 hp
227 kW
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Metric
Gear - Forward 8th
362 hp
266 kW
Gear - Reverse 1st
309 hp
227 kW
Gear - Forward 3rd
315 hp
232 kW
Gear - Forward 7th
347 hp
255 kW
Optional Tire Arrangements
Wheel Group - 19.5×25 MP (4)
Tires: 23.5R25 Michelin XHA 2 Star
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Net
Gear - Reverse 1st
304 hp
227 kW
Weights Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final)*
Note (1)
*No Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final) emission engine: subtract 150 kg (331 lb) from rear axle wt. & total wt.
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Net
Gear - Forward 6th
337 hp
251 kW
Gear - Forward 8th
357 hp
266 kW
Variable Power Tier 4 Final/Stage IV/Japan 2014 (Tier 4 Final), Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent or Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Metric
Gear - Reverse 3rd-6th
315 hp
232 kW
Optional Tire Arrangements
Wheel Group - 19.5×25 MP (5)
Tires: 23.5R25 Michelin XLDD 2 Star L5
Operating Specifications
Note
Calculated with no slip and 23.5R25 L-3 tires.
Moldboard
Note
*Blade pull calculated at 0.9 traction coefficient, which is equal to ideal no-slip conditions, and Gross Machine Weight.
Standard Equipment
NOTE
OPERATOR ENVIRONMENT
POWER TRAIN
GUARDS
ELECTRICAL
SAFETY
OTHER STANDARD EQUIPMENT
WORK TOOLS/G.E.T.
TIRES, RIMS, AND WHEELS
FLUIDS
