M318 Wheeled Excavator

M318 Wheeled Excavator

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The Cat® M318 Wheeled Excavator provides top performance with 14 percent more swing torque and features unmatched versatility with full tiltrotator integration and advanced hydraulics. Save time and money with ...
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Engine Power - ISO 14396
Engine Model
Note (1)
Meets U.S. EPA Tier 4 Final, EU Stage V, and Korea Tier 4 Final emission standards.
Note (2)
Net power advertised is the power available at the flywheel when engine is equipped with fan, air cleaner, CEM exhaust gas aftertreatment, alternator, and cooling fan running at intermediate speed.
Note (3)
Recommended for use up to 3000 m (9,843 ft) altitude with engine power derate above 3000 m (9,843 ft).
Note (4)
Rated speed 2,200 rpm.
Engine Power - Maximum Gross - ISO 14396 - Metric
131 kW (176 hp) (PS)

Machine Weight

Operating Weight Maximum
Operating Weight Minimum
Note (1)
Operating weight includes full fuel tank, operator, bucket 610 kg (1,340 lb), and dual pneumatic tires. Weight varies depending on configuration.
Note (2)
Typical configurations include 2500 mm (8'2") medium stick and 3700 kg (8,157 lb) counterweight.


Maximum Travel Speed

Hydraulic System

Main System - Maximum Flow - Implement
Maximum Pressure - Equipment
Maximum Pressure - Swing
Maximum Pressure - Travel

Service Refill Capacities

Cooling System
8.5gal (US)
Diesel Exhaust Fluid (DEF)
5.3gal (US)
Hydraulic System - Including Tank
68.7gal (US)
Hydraulic Tank
31.7gal (US)
Final Drive
0.7gal (US)
Fuel Tank
92.5gal (US)


5205 mm (17'1")
0.91 m³ GD (1.19 yd³)
2.5 m (8' 2")
Shipping Height - Top of Cab
Shipping Length
Counterweight Clearance
Ground Clearance
Support Point
Tail Swing Radius
Wheel Base

Working Ranges and Forces

Boom Type
VA Boom
0.91 m³ GD (1.19 yd³)
Digging Height
2.5 m (8' 2")
Reach at Ground Level
Vertical Wall Digging Depth
Note (1)
Range values are with dual pneumatic tires (10.00-20). Range values are calculated with a GD bucket (CW) and CW-30 quick coupler with a tip radius of 1484 mm (4'10"). Force values are calculated with heavy lift on, a GD bucket (pin-on), and a tip radius o
Bucket Forces (ISO)
Stick Forces (ISO)
Cutting Height

Swing Mechanism

Maximum Swing Speed
Swing Speed

Service Refill

Engine Oil
2.9gal (US)

Air Conditioning System

The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg of refrigerant which has a CO2 equivalent of 1.216 metric tonnes.


  • The Cat engine matches to your performance and production needs. The engine meets U.S. EPA Tier 4 Final, EU Stage V, and Korea Tier 4 Final emission standards.
  • Travel between sites easier with travel speeds up to 35 kph (21.7 mph).
  • From dirt to asphalt, the excavator matches your needs to get the job done in a timely, efficient manner.
  • The advanced hydraulic system provides the optimum balance of power and efficiency, while giving you the control you need for precise working requirements.
  • With up to 14 percent more swing torque, you can get the job done faster to move on to the next one. The dedicated swing pump provides consistent power for better multitasking capabilities.
  • Auxiliary hydraulic options give you the versatility to use a wide range of Cat attachments.
  • Don't let the temperature stop you from working. The excavator has a standard high-ambient temperature capability of 52° C (125° F) and cold start capability of -18° C (0° F).


  • Choose between Deluxe and Premium cab options.
  • The Deluxe seat is heated and air adjustable, while the Premium seat is heated, cooled, and adjusts automatically.
  • Get in and out of the cab easier using the tip-up left console.
  • Feel more comfortable in the cab while you work with reduced cab vibrations from advanced viscous mounts.
  • Control the excavator comfortably with easy-to-reach controls.
  • Stow your gear with plenty of in-cab storage beneath and behind the seat, overhead, and in the consoles. A cup holder, bottle holder, and coat hook are also provided.
  • Bluetooth® integrated radio allows for seamless mobile phone connection to listen to music, podcasts, and hands-free calling.
  • Easily adjust to your ideal temperature with the touchscreen monitor or jog dial.


  • Quickly check and service your machine with daily maintenance points accessible from ground level.
  • Check the engine oil level quickly and safely from the ground.
  • Save up to 10 percent in maintenance parts with the new, longer lasting filters.
  • Track your machine's filter life and maintenance intervals on the in-cab monitor.
  • Two levels of fuel filtration protect the engine from dirty diesel.
  • The new hydraulic oil filter provides improved filtration performance, anti-drain valves to keep oil clean when the filter is replaced, and longer life with a 3,000-hour replacement interval - 50 percent longer than previous filter designs.
  • S•O•S SM ports are located at ground level, simplifying maintenance and allowing for quick, easy extraction of fluid samples for analysis.


  • Start the engine with the push-to-start button, a Bluetooth key fob, or the unique operator ID function.
  • Program your power mode and joystick preferences using operator ID; the excavator remembers your settings each time you go to work.
  • Navigate quickly on the standard high-resolution 254 mm (10 in) touchscreen monitor or with the aid of the jog dial control.
  • Not sure how a function works or how to maintain the excavator? Simply access the operator's manual on the touchscreen monitor.
  • The auto axle lock presses the pedal for you to reduce your overall number of actions. The machine automatically detects when the service brake and axle need to be locked or unlocked. It releases automatically when you press the travel pedal.


  • Access daily maintenance points from ground level.
  • Keep your excavator secure with operator ID. Use your PIN code on the monitor to enable the push-button starting feature.
  • The standard ROPS cab meets ISO 12117-2:2008 requirements.
  • Enjoy better visibility into trenches, in each swing direction and behind you, with the help of smaller cab pillars, larger windows, and a flat engine hood design. Rearview and sideview cameras are standard.
  • The service platform design provides easy, safe, and quick access to the upper service platform; the service platform steps use antiskid punch plate to prevent slipping.
  • The standard hydraulic lockout lever isolates all hydraulic and travel functions in the lowered position.
  • Travel and swing lock prevent front linkage from moving as you travel.
  • Ground level shutoff switch stops all fuel to the engine when activated and shuts down the machine.

Boost Efficiency and Productivity with Integrated Cat Technologies

  • Boost productivity versus traditional grading with optional Cat Grade with 2D system.
  • Optional Cat Payload on-board weighing system: Achieve precise load targets and increase loading efficiency with on-the-go weighing and real-time estimates of your payload without swinging.
  • Combine Payload with VisionLink® and remotely manage your production targets or take payload data with you. The monitor’s USB port lets you download your results from one shift all the way up to 30 days of work so can manage your progress without needing an internet connection or VisionLink subscription.
  • Upgrade to optional Cat Grade with Advanced 2D: Create and edit grade designs with ease on a second high-resolution 254 mm (10 in) touchscreen monitor.
  • Upgrade to optional Cat Grade with 3D: Create and edit designs with ease and see the front linkage’s full range of motion on a second high-resolution touchscreen monitor.
  • Optional 2D E-fence is integrated right out of the factory to prevent the excavator from moving outside operator defined set points.
  • All Cat Grade systems are compatible with radios and base stations from Trimble, Topcon, and Leica. Already invested in a grade infrastructure? You can install grade systems from Trimble, Topcon, and Leica onto the machine.

Standard Equipment:

Optional Equipment:

    • Standard and optional equipment may vary. Consult your Cat dealer for details.
    • Deluxe cab
    • Premium cab
    Cat Technologies
    • Cat Grade with 2D
    • Cat Grade with Advanced 2D
    • Cat Grade with 3D
    • Payload
    • 2D E-Fence
    Hydraulic System
    • Boom/stick lowering check valves
    • SmartBoom
    • Ride control
    • Cat TRS support
    • Joystick steering
    • Slider joysticks (2 types)
    • Combined flow/high-pressure auxiliary circuit
    • Quick coupler circuit
    Boom And Sticks
    • 5205 mm (17'1") variable adjustable boom
    • 2200 mm (7'3") stick
    • 2500 mm (8'2") stick
    • 2900 mm (9'6") stick
    • 5100 mm (16'9") One-piece boom
    • 5100 mm (16'9") One-piece boom
    Undercarriage And Structures
    • 10.00-20 16 PR, dual tires
    • 315/70R22.5, no gap dual tires
    • 445/70R 19.5, single tires
    • 3700 kg (8,157 lb) counterweight
    • 4200 kg (9,259 lb) counterweight
    Electrical System
    • LED lights on chassis (left-hand, right-hand) and counterweight
    • Electrical refueling pump
    Service And Maintenance
    • Automatic lubrication system for implement and swing system
    Safety And Security
    • 360° visibility
    • Rotating beacon