The 18 builds on the success of the 16M and offers additional power, a wider moldboard and the possibility to use a more aggressive blade angle, making it an ideal fit for mining operations that run 172-tonne (190-ton) or smaller trucks. The 18 enhances operational efficiencies by increasing coverage and reducing the number of passes required to complete the width of the road in certain applications. The 18 includes features that provide large benefits on operating cost reduction, uptime & performance improvements as well as enhanced safety.
Base Power (1st Gear) - Net
304 HP
Engine Model
Cat® C13
5.1 in
Base Power (1st Gear) - Net
304 HP
Engine Model
Cat® C13
5.1 in
6.2 in
Speed at Rated Power
2,000 rpm
Standard - Ambient Capability
122 °F
Base Power (1st Gear) - Net - Metric
309 HP
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
Derating Altitude - Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent
12176 ft
Derating Altitude - Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent
12973 ft
Maximum Torque - ISO 9249 - Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent
1270 lb/ft
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)
Maximum Torque - ISO 9249 - Tier 4/Stage IV/Japan 2014 (Tier 4 Final)
1306 lb/ft
Derating Altitude - Tier 4/Stage IV/Japan 2014 (Tier 4 Final)
12500 ft
Torque Rise - Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent
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
VHP Range - Net - Metric
227-266 kW (309-362 hp)
Emissions (3)
Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards
763 in³
Number of Cylinders
Optimized VHP Range - Net
227-266 kW (304-357 hp)
Forward/Reverse Gears
8 Forward/6 Reverse
Direct drive, power shift, countershaft
Brakes - Parking
Spring applied, hydraulically released
Brakes - Dynamic Brake Torque per Wheel
27069.27 lb/ft
Brakes - Service
Oil-actuated, oil disc
Brakes - Secondary
Oil-actuated, oil-disc
Circuit Type
Electro-hydraulic load sensing, closed center
Pump Type
Variable piston
Maximum System Pressure
3590 psi
Standby Pressure
856 psi
Pump Output*
74 gal/min
*Pump output measured at 2,150 rpm.
Forward - 6th
16.0 mile/h
Forward - 2nd
3.8 mile/h
Forward - 8th
32.1 mile/h
Forward - 5th
11.8 mile/h
Reverse - 3rd
6.0 mile/h
Turning Radius - Outside Front Tires
30.5 ft
Forward - 4th
7.6 mile/h
Top Speed - Reverse
25.3 mile/h
Forward - 7th
22.0 mile/h
Articulation Angle - Left/Right
Reverse - 1st
2.2 mile/h
Forward - 3rd
5.5 mile/h
Reverse - 4th
9.3 mile/h
Forward - 1st
2.8 mile/h
Top Speed - Forward
32.1 mile/h
Reverse - 6th
25.3 mile/h
Steering Range - Left/Right
Reverse - 2nd
4.1 mile/h
Reverse - 5th
17.4 mile/h
Calculated with no slip and 23.5R25 L-3 tires.
Fuel Capacity
131 gal (US)
Cooling System
18.5 gal (US)
Hydraulic System - Tank
18.5 gal (US)
Hydraulic System - Total
38.6 gal (US)
DEF Tank
4.2 gal (US)
Engine Oil
9.5 gal (US)
Transmission - Differential - Final Drives
26 gal (US)
Tandem Housing - Each
34 gal (US)
Front Wheel Spindle Bearing Housing
0.24 gal (US)
Circle Drive Housing
2.6 gal (US)
Front Frame Structure - Width
14.0 in
Front Axle - Height to Center
26.4 in
Circle - Diameter
71.7 in
Front Frame Structure - Thickness
0.6 in
Front Frame Structure - Height
18.1 in
Circle - Blade Beam Thickness
2 in
Drawbar - Width
3 in
Front Axle - Wheel Lean
18° Left/17° Right
Front Axle - Total Oscillation per Side
Drawbar - Height
8 in
Sidewall Thickness - Outer
0.9 in
Sidewall Thickness - Inner
0.9 in
Tandem Oscillation - Front Up
Tandem Oscillation - Front Down
25.5 in
9.3 in
Drive Chain Pitch
2.5 in
Wheel Axle Spacing
72.5 in
Blade Width
18.0 ft
Arc Radius
16.3 in
Throat Clearance
5 in
Down Force - Maximum GVW
43861 lb
Blade Pull* - Base GVW
47216 lb
Blade Pull* - Maximum GVW
52878 lb
End Bit - Width
6 in
Down Force - Base GVW
34008 lb
Cutting Edge Thickness
1.4 in
1 in
18 ft
Cutting Edge Width
10 in
End Bit - Thickness
0.75 in
31 in
*Blade pull calculated at 0.9 traction coefficient, which is equal to ideal no-slip conditions, and Gross Machine Weight.
Maximum Blade Position Angle
Maximum Lift Above Ground
15.7 in
Maximum Depth of Cut
18.5 in
Maximum Shoulder Reach Outside of Tires - Right
103 in
Circle Centershift - Right
22 in
Maximum Shoulder Reach Outside of Tires - Left
103 in
Moldboard Sideshift - Right
31.1 in
Blade Tip Range - Backward
Moldboard Sideshift - Left
29.1 in
Circle Centershift - Left
27.2 in
Blade Tip Range - Forward
Shank Holder Spacing - Minimum
17.5 in
Ripping Depth - Maximum
17.8 in
Ripper Shank Holders
Penetration Force
30311 lb
Pry-Out Force
43700 lb
Machine Length Increase, Beam Raised
63.4 in
Shank Holder Spacing - Maximum
20 in
Operating Weight - Typically Equipped
74324 lb
Gross Vehicle Weight - Typically Equipped - Rear Axle
53830 lb
Gross Vehicle Weight - Base** - Total
72298 lb
Gross Vehicle Weight - Maximum Tested - Rear Axle
58753 lb
Gross Vehicle Weight - Maximum Tested - Front Axle
26125 lb
Gross Vehicle Weight - Typically Equipped - Front Axle
20494 lb
Gross Vehicle Weight - Base** - Front Axle
19837 lb
Gross Vehicle Weight - Maximum Tested - Total
84877 lb
Gross Vehicle Weight - Typically Equipped - Total
74324 lb
Gross Vehicle Weight - Base** - Rear Axle
52461 lb
Note (2)
**Base operating weight calculated on standard machine configuration with 23.5R25 tires, full fuel tank operator and rops cab.
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.
Height - Top of Cylinders
122.6 in
Width - Outside Rear Tires
134.3 in
Height - Exhaust Stack
141.1 in
Length - Between Tandem Axles
72.5 in
Length - Front Axle to Mid Tandem
290 in
Width - Tire Center Lines
106.4 in
Length - Front Axle to Moldboard
120.7 in
Length - Counterweight to Ripper
474.4 in
Height - Front Axle Center
29.9 in
Width - Outside Front Tires
134.3 in
Length - Front Tire to Rear of Machine - Including Tow Hitch
417 in
Height - Top of Cab
147.5 in
Ground Clearance - Rear Axle
16.7 in
ISO 6394: 2008/ISO 6395: 2008/ISO 6396: 2008
ISO 3471: 2008/ISO 3449: 2005
ISO 3450: 2011
ISO 5010: 2007
Gear - Forward 1st
309 HP
Gear - Forward 2nd
309 HP
Gear - Reverse 2nd
309 HP
Gear - Forward 4th
325 HP
Gear - Forward 6th
341 HP
Gear - Forward 5th
332 HP
Gear - Forward 8th
362 HP
Gear - Reverse 1st
309 HP
Gear - Forward 3rd
315 HP
Gear - Forward 7th
347 HP
Gear - Reverse 3rd-6th
315 HP
Wheel Group - 19.5×25 MP (2)
Tires: 23.5R25 Bridgestone VKT 1 Star
Wheel Group - 19.5×25 MP (1)
Tires: 23.5R25 Bridgestone VKT 2 Star
Wheel Group - 19.5×25 MP (3)
Tires: 23.5R25 Bridgestone VJT 1 Star
Wheel Group - 19.5×25 MP (4)
Tires: 23.5R25 Michelin XHA 2 Star
Wheel Group - 19.5×25 MP (5)
Tires: 23.5R25 Michelin XLDD 2 Star L5
Gear - Forward 4th
321 HP
Gear - Reverse 2nd
304 HP
Gear - Forward 1st
304 HP
Gear - Reverse 3rd-6th
311 HP
Gear - Forward 3rd
311 HP
Gear - Forward 5th
327 HP
Gear - Forward 7th
342 HP
Gear - Forward 2nd
304 HP
Gear - Reverse 1st
304 HP
Gear - Forward 6th
337 HP
Gear - Forward 8th
357 HP
  • 18 foot moldboard and straight 10 inch by 1-3/8 inch cutting edge, allowing operators to increase coverage by 12.5% compared to a 16 foot moldboard. The operator can use a more aggressive blade angle and still be able to deposit the windrow away from the tires to protect tire life. More aggressive blade angles reduce the load on the machine and maintain better ground speed for enhanced performance.
  • Variable Horse Power (VHP) provides the ideal amount of power in all gears to efficiently perform diverse motor grader applications while protecting structure and drive train components.
  • With optimized combination of weight and balance the 18delivers enhanced traction and the ability to keep ground speed, especially when carrying a large load on the board.
  • Emissions reduction technology is transparent and automated with no action required from the operator.
  • Rear Ripper / Scarifier penetrates tough material fast for easier movement with the moldboard. Standard ripper with three shanks can add four more for additional versatility.
  • Multi-color, touch screen Information Display is the operator's gateway to monitoring machine performance and offers a convenient way of modifying machine parameters to tailor performance to the current task. Provides access to service information for initial troubleshooting.
  • Cat Product Link™ Elite is deeply integrated into the machine, helping take the guesswork out of equipment management. Easy access to timely information like machine location, hours, fuel usage, idle time and event codes via the online VisionLink® user interface can help effectively manage fleets and lower operating costs.
  • Manage your fleet of machines while reducing fuel burn with Cat Production Measurement System option. The Efficiency Coach and Application Segmentation work together to monitor operators and machines simultaneously. Measure your jobsite’s efficiency and productivity from anywhere on the website.
  • The 18 helps to reduce downtime and operating costs through improved serviceability, fuel economy and reduced maintenance. Major components are modular in design, so most can be removed and reinstalled without disturbing other components.
  • Eco Mode improves fuel economy by reducing high idle engine speed while maintaining machine power. ECO Mode controls the high engine idle speed (capped at 1,900 rpm in working gears) to ensure the engine is performing as efficiently as possible. Provides significant fuel savings especially in operations that typically run light to moderate loads.
  • Center shift section of the front frame is made of heavy duty steel casting which improves stress distribution to this high load area for enhanced durability.
  • The rear frame structure is lengthened to provide easy service access to components in the engine enclosure as well as improve machine balance.
  • Front axle steering cylinder has been designed to enhance durability and hydraulic hoses have been routed to improve reliability.
  • A front guard helps protect the front axle from rocks or other debris that could damage the axle or its components.
  • The transmission guard provides a steel protection from ground debris.
  • Modular cooling package makes for simple removal and installation of components on the cooling system which reduces service time.
  • Engine enclosure doors provide complete and easy access to the engine without the impediment of any enclosure post.
  • Extended maintenance intervals reduce the number of touches and downtime.
  • Ok to Start and critically low fluid monitoring systems help prevent critical components from damage when low fluid levels are present. All information is available via the Information Display within the cab, and diagnostic codes are logged.
  • Caterpillar considers the safety of everyone in, on or around Cat equipment when developing new products or enhancing safety features for existing products.
  • The 18has numerous safety features such as but not limited to -
  1. Access to Tandem
  2. Light Emitting Diode (LED) Enclosure Service Lights
  3. Seat Belt Indication
  4. Fire Suppression Ready System
  5. Rearview Camera
  6. Optional Access Platform
  7. Optional Service Access Platform
  • Your local Cat dealer is committed to helping you succeed, by ensuring you have the right machine for the job, making parts and service readily available, offering operator training and providing you with versatile work tools.