Create a CEG Account  /  CEG Login
☰
Parts
Buyer's Guides
Digital Issues
Videos


Caterpillar 18 Motor Grader Specs

General Specifications

Caterpillar 18 Motor Grader General Specifications specifications
Blade Width 18.00 ft (5.49 m) - Starting 2021
Engine C13 - Starting 2023
Net Power 304.00 hp (226.70 kw) - Starting 2021
Net Power - First Gear 304.00 hp (226.70 kw) - Starting 2023
Operating Weight 74,324 lb - Starting 2021
Operating Weight - Typically Equipped 74,324 lb - Starting 2024
Top Speed - Forward 32.10 mph (51.66 kph) - Starting 2023
Top Speed - Reverse 25.30 mph (40.72 kph) - Starting 2023

Air Conditioning System

Caterpillar 18 Motor Grader Air Conditioning System specifications
Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. - If equipped with R134a (Global Warming Potential = 1430), the system contains 2 kg (4.4 lb) of refrigerant which has a CO2 equivalent of 2.860 metric tonnes (3.152 tons). - Starting 2026

Blade Range

Caterpillar 18 Motor Grader Blade Range specifications
Blade Tip Range - Backward 5 degrees - Starting 2026
Blade Tip Range - Forward 40 degrees - Starting 2026
Circle Centershift - Left 27.20 in (69.09 cm) - Starting 2026
Circle Centershift - Right 22.00 in (55.88 cm) - Starting 2026
Maximum Blade Position Angle 65 degrees - Starting 2026
Maximum Depth of Cut 18.50 in (46.99 cm) - Starting 2026
Maximum Lift Above Ground 15.70 in (39.88 cm) - Starting 2026
Maximum Shoulder Reach Outside of Tires - Left 103.00 in (261.62 cm) - Starting 2026
Maximum Shoulder Reach Outside of Tires - Right 103.00 in (261.62 cm) - Starting 2026
Moldboard Sideshift - Left 29.10 in (73.91 cm) - Starting 2026
Moldboard Sideshift - Right 31.10 in (78.99 cm) - Starting 2026

Dimensions (Approximate)

Caterpillar 18 Motor Grader Dimensions (Approximate) specifications
Ground Clearance - Rear Axle 16.70 in (42.42 cm) - Starting 2026
Height - Exhaust Stack 141.10 in (358.39 cm) - Starting 2026
Height - Front Axle Center 29.90 in (75.95 cm) - Starting 2026
Height - Top of Cab 147.50 in (374.65 cm) - Starting 2026
Height - Top of Cylinders 122.60 in (311.40 cm) - Starting 2026
Length - Between Tandem Axles 72.50 in (184.15 cm) - Starting 2026
Length - Counterweight to Ripper 474.40 in (1,204.98 cm) - Starting 2026
Length - Front Axle to Mid Tandem 290.00 in (736.60 cm) - Starting 2026
Length - Front Axle to Moldboard 120.70 in (306.58 cm) - Starting 2026
Length - Front Tire to Rear of Machine - Including Tow Hitch 417.00 in (1,059.18 cm) - Starting 2026
Width - Outside Front Tires 134.30 in (341.12 cm) - Starting 2026
Width - Outside Rear Tires 134.30 in (341.12 cm) - Starting 2026
Width - Tire Center Lines 106.40 in (270.26 cm) - Starting 2026

Engine

Caterpillar 18 Motor Grader Engine specifications
Base Power (1st Gear) - Net 304.00 hp (226.70 kw) - Starting 2026
Base Power (1st Gear) - Net - Metric 309.00 hp (230.43 kw) - Starting 2026
Bore 5.10 in (12.95 cm) - Starting 2026
Derating Altitude - Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent 12,176.00 ft (3,711.24 m) - Starting 2026
Derating Altitude - Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent 12,973.00 ft (3,954.17 m) - Starting 2026
Derating Altitude - Tier 4/Stage IV/Japan 2014 (Tier 4 Final) 12,500.00 ft (3,810.00 m) - Starting 2026
Displacement 763.00 cu in (12,503.36 cu cm) - Starting 2026
Emissions (1) U.S. EPA Tier 4 Final/EU Stage V/Japan 2014 (Tier 4 Final) - Starting 2026
Emissions (2) Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent Emission Standards - Starting 2026
Emissions (3) Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent Emission Standards - Starting 2026
Engine Model Cat® C13 - Starting 2026
Maximum Torque - ISO 9249 - Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent 1,270.00 lbs ft (1,721.87 nm) - Starting 2026
Maximum Torque - ISO 9249 - Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent 1,270.00 lbs ft (1,721.87 nm) - Starting 2026
Maximum Torque - ISO 9249 - Tier 4/Stage IV/Japan 2014 (Tier 4 Final) 1,306.00 lbs ft (1,770.67 nm) - Starting 2026
Number of Cylinders 6 - Starting 2026
Optimized VHP Range - Net 227-266 kW (304-357 hp) - Starting 2026
Speed at Rated Power 2,000 rpm - Starting 2026
Standard - Ambient Capability 122 °F - Starting 2026
Standard - Fan Speed - Maximum 1,450 rpm - Starting 2026
Standard - Fan Speed - Minimum 550 rpm - Starting 2026
Stroke 6.20 in (15.75 cm) - Starting 2026
Torque Rise - Tier 2/Stage II/Japan 2001 (Tier 2) Equivalent 38% - Starting 2026
Torque Rise - Tier 3/Stage IIIA/Japan 2006 (Tier 3) Equivalent 38% - Starting 2026
Torque Rise - Tier 4/Stage IV/Japan 2014 (Tier 4 Final) 40% - Starting 2026
VHP Range - Net 227-266 kW (304-357 hp) - Starting 2026
VHP Range - Net - Metric 227-266 kW (309-362 hp) - Starting 2026

Frame

Caterpillar 18 Motor Grader Frame specifications
Circle - Blade Beam Thickness 2.00 in (5.08 cm) - Starting 2026
Circle - Diameter 71.70 in (182.12 cm) - Starting 2026
Drawbar - Height 8.00 in (20.32 cm) - Starting 2026
Drawbar - Width 3.00 in (7.62 cm) - Starting 2026
Front Axle - Height to Center 26.40 in (67.06 cm) - Starting 2026
Front Axle - Total Oscillation per Side 35 degrees - Starting 2026
Front Axle - Wheel Lean 18° Left/17° Right - Starting 2026
Front Frame Structure - Height 18.10 in (45.97 cm) - Starting 2026
Front Frame Structure - Thickness 0.60 in (1.52 cm) - Starting 2026
Front Frame Structure - Width 14.00 in (35.56 cm) - Starting 2026

Hydraulic System

Caterpillar 18 Motor Grader Hydraulic System specifications
Circuit Type Electro-hydraulic load sensing, closed center - Starting 2026
Maximum System Pressure 3590 psi - Starting 2026
Pump Output* 74.00 gpm (280.09 lpm) - Starting 2026
Pump Type Variable piston - Starting 2026
Standby Pressure 856 psi - Starting 2026

Moldboard

Caterpillar 18 Motor Grader Moldboard specifications
Arc Radius 16.30 in (41.40 cm) - Starting 2026
Blade Pull* - Base GVW 47,216.00 lbs (21,416.84 kg) - Starting 2026
Blade Pull* - Maximum GVW 52,878.00 lbs (23,985.09 kg) - Starting 2026
Blade Width 18.00 ft (5.49 m) - Starting 2026
Cutting Edge Thickness 1.40 in (3.56 cm) - Starting 2026
Cutting Edge Width 10.00 in (25.40 cm) - Starting 2026
Down Force - Base GVW 34,008.00 lbs (15,425.79 kg) - Starting 2026
Down Force - Maximum GVW 43,861.00 lbs (19,895.04 kg) - Starting 2026
End Bit - Thickness 0.75 in (1.90 cm) - Starting 2026
End Bit - Width 6.00 in (15.24 cm) - Starting 2026
Height 31.00 in (78.74 cm) - Starting 2026
Thickness 1.00 in (2.54 cm) - Starting 2026
Throat Clearance 5.00 in (12.70 cm) - Starting 2026
Width 18.00 ft (5.49 m) - Starting 2026

Operating Specifications

Caterpillar 18 Motor Grader Operating Specifications specifications
Articulation Angle - Left/Right 20 degrees - Starting 2026
Forward - 1st 2.80 mph (4.51 kph) - Starting 2026
Forward - 2nd 3.80 mph (6.12 kph) - Starting 2026
Forward - 3rd 5.50 mph (8.85 kph) - Starting 2026
Forward - 4th 7.60 mph (12.23 kph) - Starting 2026
Forward - 5th 11.80 mph (18.99 kph) - Starting 2026
Forward - 6th 16.00 mph (25.75 kph) - Starting 2026
Forward - 7th 22.00 mph (35.41 kph) - Starting 2026
Forward - 8th 32.10 mph (51.66 kph) - Starting 2026
Reverse - 1st 2.20 mph (3.54 kph) - Starting 2026
Reverse - 2nd 4.10 mph (6.60 kph) - Starting 2026
Reverse - 3rd 6.00 mph (9.66 kph) - Starting 2026
Reverse - 4th 9.30 mph (14.97 kph) - Starting 2026
Reverse - 5th 17.40 mph (28.00 kph) - Starting 2026
Reverse - 6th 25.30 mph (40.72 kph) - Starting 2026
Steering Range - Left/Right 47.5 degrees - Starting 2026
Top Speed - Forward 32.10 mph (51.66 kph) - Starting 2026
Top Speed - Reverse 25.30 mph (40.72 kph) - Starting 2026
Turning Radius - Outside Front Tires 30.50 ft (9.30 m) - Starting 2026

Optional Tire Arrangements

Caterpillar 18 Motor Grader Optional Tire Arrangements specifications
Wheel Group - 19.5×25 MP (1) Tires: 23.5R25 Bridgestone VKT 2 Star - Starting 2026
Wheel Group - 19.5×25 MP (2) Tires: 23.5R25 Bridgestone VKT 1 Star - Starting 2026
Wheel Group - 19.5×25 MP (3) Tires: 23.5R25 Bridgestone VJT 1 Star - Starting 2026
Wheel Group - 19.5×25 MP (4) Tires: 23.5R25 Michelin XHA 2 Star - Starting 2026
Wheel Group - 19.5×25 MP (5) Tires: 23.5R25 Michelin XLDD 2 Star L5 - Starting 2026

Power Train

Caterpillar 18 Motor Grader Power Train specifications
Brakes - Dynamic Brake Torque per Wheel 27,069.27 lbs ft (36,700.52 nm) - Starting 2026
Brakes - Parking Spring applied, hydraulically released - Starting 2026
Brakes - Secondary Oil-actuated, oil-disc - Starting 2026
Brakes - Service Oil-actuated, oil disc - Starting 2026
Forward/Reverse Gears 8 Forward/6 Reverse - Starting 2026
Transmission Direct drive, power shift, countershaft - Starting 2026

Ripper

Caterpillar 18 Motor Grader Ripper specifications
Machine Length Increase, Beam Raised 63.40 in (161.04 cm) - Starting 2026
Penetration Force 30,311.00 lbs (13,748.86 kg) - Starting 2026
Pry-Out Force 43,700.00 lbs (19,822.01 kg) - Starting 2026
Ripper Shank Holders 7 - Starting 2026
Ripping Depth - Maximum 17.80 in (45.21 cm) - Starting 2026
Shank Holder Spacing - Maximum 20.00 in (50.80 cm) - Starting 2026
Shank Holder Spacing - Minimum 17.50 in (44.45 cm) - Starting 2026

Service Refill

Caterpillar 18 Motor Grader Service Refill specifications
Circle Drive Housing 2.60 gal (9.84 l) - Starting 2026
Cooling System 18.50 gal (70.02 l) - Starting 2026
DEF Tank 4.20 gal (15.90 l) - Starting 2026
Engine Oil 9.50 gal (35.96 l) - Starting 2026
Front Wheel Spindle Bearing Housing 0.24 gal (0.91 l) - Starting 2026
Fuel Capacity 131.00 gal (495.84 l) - Starting 2026
Hydraulic System - Tank 18.50 gal (70.02 l) - Starting 2026
Hydraulic System - Total 38.60 gal (146.10 l) - Starting 2026
Tandem Housing - Each 34.00 gal (128.69 l) - Starting 2026
Transmission - Differential - Final Drives 26.00 gal (98.41 l) - Starting 2026

Standards

Caterpillar 18 Motor Grader Standards specifications
Brakes ISO 3450: 2011 - Starting 2026
ROPS/FOPS ISO 3471: 2008/ISO 3449: 2005 - Starting 2026
Sound ISO 6394: 2008/ISO 6395: 2008/ISO 6396: 2008 - Starting 2026
Steering ISO 5010: 2007 - Starting 2026

Tandems

Caterpillar 18 Motor Grader Tandems specifications
Drive Chain Pitch 2.50 in (6.35 cm) - Starting 2026
Height 25.50 in (64.77 cm) - Starting 2026
Sidewall Thickness - Inner 0.90 in (2.29 cm) - Starting 2026
Sidewall Thickness - Outer 0.90 in (2.29 cm) - Starting 2026
Tandem Oscillation - Front Down 25 degrees - Starting 2026
Tandem Oscillation - Front Up 15 degrees - Starting 2026
Wheel Axle Spacing 72.50 in (184.15 cm) - Starting 2026
Width 9.30 in (23.62 cm) - Starting 2026

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

Caterpillar 18 Motor Grader 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 specifications
Gear - Forward 1st 309.00 hp (230.43 kw) - Starting 2026
Gear - Forward 2nd 309.00 hp (230.43 kw) - Starting 2026
Gear - Forward 3rd 315.00 hp (234.90 kw) - Starting 2026
Gear - Forward 4th 325.00 hp (242.36 kw) - Starting 2026
Gear - Forward 5th 332.00 hp (247.58 kw) - Starting 2026
Gear - Forward 6th 341.00 hp (254.29 kw) - Starting 2026
Gear - Forward 7th 347.00 hp (258.76 kw) - Starting 2026
Gear - Forward 8th 362.00 hp (269.95 kw) - Starting 2026
Gear - Reverse 1st 309.00 hp (230.43 kw) - Starting 2026
Gear - Reverse 2nd 309.00 hp (230.43 kw) - Starting 2026
Gear - Reverse 3rd-6th 315.00 hp (234.90 kw) - Starting 2026

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

Caterpillar 18 Motor Grader 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 specifications
Gear - Forward 1st 304.00 hp (226.70 kw) - Starting 2026
Gear - Forward 2nd 304.00 hp (226.70 kw) - Starting 2026
Gear - Forward 3rd 311.00 hp (231.92 kw) - Starting 2026
Gear - Forward 4th 321.00 hp (239.37 kw) - Starting 2026
Gear - Forward 5th 327.00 hp (243.85 kw) - Starting 2026
Gear - Forward 6th 337.00 hp (251.31 kw) - Starting 2026
Gear - Forward 7th 342.00 hp (255.03 kw) - Starting 2026
Gear - Forward 8th 357.00 hp (266.22 kw) - Starting 2026
Gear - Reverse 1st 304.00 hp (226.70 kw) - Starting 2026
Gear - Reverse 2nd 304.00 hp (226.70 kw) - Starting 2026
Gear - Reverse 3rd-6th 311.00 hp (231.92 kw) - Starting 2026

Weights

Caterpillar 18 Motor Grader Weights specifications
Operating Weight - Typically Equipped 74,324.00 lbs (33,712.84 kg) - Starting 2026

Weights Tier 4 Final/Stage Iv/Japan 2014 (Tier 4 Final)*

Caterpillar 18 Motor Grader Weights Tier 4 Final/Stage Iv/Japan 2014 (Tier 4 Final)* specifications
Gross Vehicle Weight - Base** - Front Axle 19,837.00 lbs (8,997.92 kg) - Starting 2026
Gross Vehicle Weight - Base** - Rear Axle 52,461.00 lbs (23,795.94 kg) - Starting 2026
Gross Vehicle Weight - Base** - Total 72,298.00 lbs (32,793.86 kg) - Starting 2026
Gross Vehicle Weight - Maximum Tested - Front Axle 26,125.00 lbs (11,850.12 kg) - Starting 2026
Gross Vehicle Weight - Maximum Tested - Rear Axle 58,753.00 lbs (26,649.95 kg) - Starting 2026
Gross Vehicle Weight - Maximum Tested - Total 84,877.00 lbs (38,499.61 kg) - Starting 2026
Gross Vehicle Weight - Typically Equipped - Front Axle 20,494.00 lbs (9,295.93 kg) - Starting 2026
Gross Vehicle Weight - Typically Equipped - Rear Axle 53,830.00 lbs (24,416.91 kg) - Starting 2026
Gross Vehicle Weight - Typically Equipped - Total 74,324.00 lbs (33,712.84 kg) - Starting 2026
×

Stay Ahead of the Market

Get weekly equipment news, auction updates, and dealer insights — trusted by thousands of industry professionals.