Since its introduction in the 1990s, the 300 Series family of excavators has become the industry standard for production and performance. The all-new E Series and the 318E continue that trend-setting standard.

Engine Model Cat® C4.4 ACERT™
Flywheel Power 113.0 hp
Bore 4.13 in
Stroke 5.0 in
Displacement 269.0 in3
Gross Power - SAE J1995 120.0 hp
Net Power - SAE J1349 113.0 hp

Operating Weight 41010.0 lb
Maximum Operating Weight 42340.0 lb
Maximum Operating Weight** 42340.0 lb
Minimum Operating Weight 41010.0 lb
Minimum Operating Weight* 41010.0 lb

Maximum Drawbar Pull 46510.0 lb
Maximum Travel Speed 2.4 mph

Swing Mechanism
Swing Torque 37390.0 lb ft
Swing Speed 8.85 RPM

Hydraulic System
Maximum Pressure - Travel 5080.0 psi
Maximum Pressure - Swing 3340.0 psi
Pilot System - Maximum Pressure 600.0 psi
Boom Cylinder - Bore 4.0 in
Boom Cylinder - Stroke 47.0 in
Stick Cylinder - Bore 5.0 in
Stick Cylinder - Stroke 52.0 in
Bucket Cylinder - Bore 4.0 in
Bucket Cylinder - Stroke 41.0 in
Main System - Maximum Flow (Total) 79.0 gal/min
Maximum Pressure - Equipment (Boom Up) 5080.0 psi
Maximum Pressure - Equipment (Other) 4640.0 psi
Pilot System - Maximum Flow 26.1 L/min (1,590 in3/min)
Swing System - Maximum Flow 40.0 gal/min

Service Refill Capacities
Cooling System 6.3 gal
Final Drive (each) 2.1 gal
Hydraulic System (including tank) 32.0 gal
Hydraulic Tank 28.0 gal
Engine Oil (with filter) 3.6 gal
Fuel Tank Capacity 76.0 gal
Swing Drive 2.1 gal

Operator - ISO 6396 71.0 dB(A)
Spectator - ISO 6395 101.0 dB(A)

Number of Carrier Rollers (each side) 2 pieces
Number of Shoes (each side) 45 pieces
Number of Track Rollers (each side) 7 pieces

You can count on reduced emissions, economical and reliable performance.


The Cat® C4.4 ACERT™ engine is built to meet your demanding needs all day every day. There is no interruption to your job process as our new regeneration system works automatically with no operator intervention required.

Power Modes
The 318E features two power modes: High power mode is when you need maximum production; economy mode is when you need to balance performance with fuel economy. Two additional fuel-saving features are on demand engine power and engine idle shutdown. On demand engine power keeps engine speed low during light loading and automatically adjusts speed up when it senses a heavier load; engine idle shutdown automatically shuts the engine off when it’s been idling for more than a specified amount of time that you set, which can save you significant amounts of fuel, reduce your emissions, and even reduce your accumulated service hours, which will extend service intervals and improve resale value.

Biodiesel-Ready Fuel System
You have added flexibility with the C4.4 ACERT engine because it’s equipped to run on B20 biodiesel fuel that meets ASTM 6751 standards. Just fill it up and go.

You can move dirt, rock, and debris with speed, precision, and efficiency.


Hydraulic System
One of the biggest contributors to your productivity and fuel savings is a well-designed hydraulic system, and this is where Cat excavators stand apart. The 318E is loaded with several unique features that will put more power to the ground with less money out of your pocket.

Pumps and Valves
The main control valve is built to work with any tool, allowing you to take on multiple tasks with one machine. The main pumps are located side by side and are driven directly by the engine for the highest level of efficiency to reduce your fuel costs.

Boom Regeneration
Electric boom regeneration results in less pressure loss, higher controllability, more productivity, and lower operating costs for you; it works by reusing the flow of oil that travels from the head of the boom cylinder to the rod end of the boom cylinder during your operator’s everyday “boom down” operation. During boom regeneration, engine speed is controlled to be low in order to save extra oil flow from going to the boom cylinders, which saves energy.

Operator Station
Your operators will enjoy the incredibly quiet and comfortable cab.

Operator Station

Your operators can adjust the right and left joysticks for individual preferences, helping the operator become more comfortable, more productive, and more alert.

Your operators can keep safely focused on the job at hand with a high-resolution LCD monitor (1) that is programmable in 44 languages to support today’s diverse workforce. It also projects the image from the rearview camera, further enhancing your job site safety and productivity.

Power Supply and Auxiliary Audio Port
To keep your operators happy, comfortable and connected, two 12-volt power supply sockets are located on the radio near key storage areas for charging electronic devices such as an MP3 player and cell phone. An auxiliary port on the radio allows your operators to plug and play MP3 audio through the cab’s speakers.

Your operators can store their gear in storage spaces located in the front, rear, and side consoles. A dedicated space near the auxiliary power supply will hold an MP3 player and cell phone. The drink holder accommodates large mugs with handles, and a shelf behind the seat stores large lunch or toolboxes.

Automatic Climate Control
An automatic climate control system features five air outlets with filtered ventilation to make your operators comfortable in either hot or cold climates.

Three seat options help give your operators all the comfort they need for a long day of work. Air suspension, heated, and air-cooled seats are available. All seats include a reclining back, upper and lower seat slide adjustments, and height and tilt angle adjustments.

Structures & Undercarriage
You can take on a variety of tough tasks with this built-to-last machine.

Structures & Undercarriage

You can expect excellent quality, reliability, and durability with the 318E’s reinforced lower and upper frames (1). Both are built to handle a hard day’s work over and over again.

Long undercarriage (2) supports any type of work you can do with an 18 metric ton machine. The track rollers are a double solid-pin-type design to improve reliability; an optional two-piece guiding guard helps maintain track alignment and improves the machine’s overall performance.

Whether you’re on flat ground hogging dirt or on a slope surgically placing rip rap over drainage pipe, the 3.4 mt (3.8 t) counterweight (3) provides plenty of weight out back to keep you balanced and productive. With integrated links, you can also easily - and safely - remove the counterweight for maintenance or shipping.

Work Tools
You can dig, hammer, rip, and cut with confidence.

Work Tools

You can extend the versatility and performance of your machine with the full lineup of Cat work tools. Each tool equips your machine to perform many different tasks found at a variety of job sites.

Couplers: Quick Tool Changes
Imagine the productivity you’ll achieve with a quick coupler. Combine a robust coupler with a common work tool inventory that can be shared between same size machines and you’ll get performance and flexibility on every job. The Cat Center-Lock™ pin grabber coupler features a patented locking system and highly visible lock. You can clearly see when the coupler is engaged or disengaged from the attachment.

Work Tools: Cut, Crush, Pulverize and Load
No matter your specialty, Caterpillar provides tools that are perfectly matched to get the most out of your Cat machine - quickly and efficiently. Field-installed hydraulic kits are uniquely designed to integrate any Cat work tool with your 318E.

Buckets: Dig, Move, Load
Cat buckets are designed to fill efficiently so you notice a fast, smooth cycle, which means high productivity each time you dig. Wear characteristics of general duty, heavy duty, and severe duty buckets give you solid performance in a wide variety of material abrasions. Ditch cleaning and other specialty buckets are available when needed.

Front Linkage
You’ll experience a long service life even in the harshest of conditions.

Front Linkage

Your uptime and service intervals are increased with high quality, durable, and reliable booms, sticks, and linkage pins. Each boom and stick is built with internal baffle plates for additional durability, and each undergoes ultrasound inspection to ensure the expected Cat durability and reliability for any tough application you might take on. A reach boom and a choice of two stick configurations provide all the utility you need. The R3.1 m (10'2") stick is best for when you need deep trenching, longer reach, and excellent truck loading capabilities. The R2.6 m (8'6") stick provides greater breakout force and increases productivity when you primarily plan on using hydro-mechanical work tools.

Integrated Technologies
You can make your team’s work much easier and more efficient.

Integrated Technologies

Cat Grade Control Depth and Slope
Cat Grade Control Depth and Slope is a standalone factory offering that allows your operator to reference a site elevation and input simple elevation and slope targets into the display to give them real-time bucket tip position through the cab monitor. This allows them to cut or fill to the target elevation the first time, which minimizes the need and cost for traditional grade checking. It also enhances job site safety and helps your team complete jobs quicker with fewer cycles, which means you’ll save money on fuel. For enhanced site features and more complex designs, Cat Grade Control Depth and Slope can be upgraded with Cat AccuGrade™ components like GPS and Universal Total Station (UTS). These positioning technologies interface with site infrastructure to allow your operators to know exactly where the bucket tip is in regards to an engineer’s digital design, which saves your operators benching time and improves their productivity and accuracy.

Cat Product Link
You can monitor and improve your fleet management with Cat Product Link™. The integrated system reports events, diagnostic codes, hours, fuel consumption, location, and other pieces of detailed machine information to the secured web-based application called Vision Link™. The powerful tools within Vision Link communicate with you and your authorized Cat dealer to allow them to help you avoid downtime and better maintain your fleet.

You can depend on safe, fast, and easy access.


Ground-Level Compartments
Your service technicians have ground-level access to the radiator, pump, and air cleaner compartments through wide service doors, making it easy for them to reach, check, and replace fluids and filters.

Cooling System
The cooling package features an improved oil cooler and engine radiator design mounted side by side and the air-to-air aftercooler and A/C condenser mounted in front. The radiator uses an aluminum square wave fin to prevent clogging, and the air-to-air aftercooler swings up and A/C condenser swings out of the way to make cleaning cores easy - a major service convenience.

Other Service Benefits
The engine oil dipstick is conveniently located in the front of the engine compartment. The fuel tank’s remote drain cock makes it easy and simple to remove water and sediment during routine maintenance. Risk of overfilling the fuel tank is significantly reduced with an integrated fuel level indicator.

Several built-in features will help protect your people.


Roll-Over Protective Structure (ROPS) Cab
Your operators will benefit from the enhanced protection of a ROPS-certified cab. It is also built to accommodate a Falling Object Guard Structure (FOGS) for industrial applications.

Sound Proofing
Roof lining and sealing make your operator’s sound experience inside the cab comparable to any of today’s top pickup trucks.

Anti-Skid Plates
Your operator and service technicians’ slipping hazards are reduced with anti-skid plates on the surface of the upper structure and the top of the storage box area.

Steps, Hand and Guard Rails
Your service technicians can work securely on the machine with extended hand and guard rails to the upper deck and steps on the track frame and storage box.

Time Delay Lights
The cab and boom lights can be programmed to stay on for up to 90 seconds after the engine has been turned off to help your operators safely exit the machine.

High Intensity Discharge (HID) Lights
You can upgrade to HID lights (1) for greater visibility in low-light conditions.

You can easily store both the upper and lower windows (2) in the cab. Your overhead visibility and lighting are enhanced with a large skylight that can double as an emergency exit.

Rearview Camera
Your operator has a clear view behind the machine through the monitor with an optional rearview camera, which is integrated in the counterweight for enhanced protection.

Complete Customer Care
Your Cat dealer will support you like no other.

Complete Customer Care

Product Support
You can maximize your machines’ uptime with the Cat worldwide dealer network. You can also decrease your repair costs by utilizing Cat remanufactured components while contributing to sustainable development.

Machine Selection
What are your job requirements and machine attachments? What production do you need? Your Cat dealer can provide recommendations to help you make the right machine configuration.

You can ensure lower owning and operating costs by utilizing unique Cat dealer services and financing options.

Customer Support Agreements
Cat dealers offer a variety of customer support agreements and work with you to develop a plan to meet your specific needs. These plans can cover the entire machine, including attachments, to help protect your investment.

You can boost your profits by improving your operators’ techniques. Your Cat dealer has videos, literature, and other ideas to help increase productivity. Caterpillar also offers simulators and certified operator training to help maximize the return on your investment.

Repair, rebuild, or replace? Your Cat dealer can help you evaluate the cost involved so you can make the best choice for your business.

Your machine is designed to benefit generations ahead.


  • The 318E is an efficient, productive machine that’s designed to conserve your financial resources for generations ahead.
  • The C4.4 ACERT engine ensures you meet U.S. EPA Tier 4 Interim emission standards.
  • The 318E has the flexibility of running on either ultra-low-sulfur diesel (ULSD) fuel with 15 ppm of sulfur or less or biodiesel (B20) fuel blended with ULSD that meets ASTM 6751 standards.
  • An overfill indicator rises when the fuel tank is full to help your service technicians avoid spilling.
  • You can ensure fast, easy, and secure changing of engine and hydraulic oil with the QuickEvac™ option.
  • A unique engine oil filter eliminates the need for painted metal cans and aluminum top plates. The cartridge-style spin-on housing enables the internal filter to be separated and replaced; the used internal element can be incinerated to help reduce waste.

Standard Equipment

  • C4.4 diesel engine
  • Biodiesel capable
  • EPA Tier 4 Interim
  • 2300 m (7,500 ft) altitude capability
  • Electric priming pump
  • Automatic engine speed control: - Economy and high power modes
  • Two-speed travel
  • Side-by-side cooling system
  • Radial seal air filter
  • Primary filter with water separator and water separator indicator
  • Secondary filter
  • Screen filter in fuel line
  • Cold weather battery -25° C (-13° F)
  • Jump start receptacle
  • Regeneration circuit for boom and stick
  • Reverse swing damping valve
  • Automatic swing parking brake
  • High-performance hydraulic return filter
  • Capability of installing hp stackable valve and medium and QC valve
  • Capability of installing additional auxiliary pump and circuit
  • Capability of installing boom lowering control device and stick lowering check valve
  • Fine swing control
  • Pressurized operator station with positive filtration
  • Sliding upper door window (left-hand cab door)
  • Glass-breaking safety hammer
  • Removable lower windshield with in cab storage bracket
  • Coat hook
  • Beverage holder
  • Literature holder
  • AM/FM radio
  • Radio with MP3 auxiliary audio port
  • Two 12V stereo speakers
  • Storage shelf suitable for lunch or toolbox
  • Color LCD display with indicators, filter/fluid change, and working hour information
  • Adjustable armrest
  • Height adjustable joystick consoles
  • Neutral lever (lock out) for all controls
  • Travel control pedals with removable hand levers
  • Capability of installing two additional pedals
  • Two power outlets, 10 amp (total)
  • Travel alarm
  • Laminated glass front upper window and tempered other windows
  • Sunscreen
  • 600 mm (24") triple grouser shoes
  • Grease Lubricated Track GLT2, resin seal
  • Towing eye on base frame Swivel guard
  • Center track guiding guard
  • 5.1 m (16'9") reach boom
  • 3.1 m (10'2") stick
  • 3.4 mt (3.8 t)
  • 80 amp alternator
  • Circuit breaker
  • Capability to electrically connect a beacon
  • Working lights, cab mounted with time delay
  • Halogen boom lights (left and right)
  • Time delay function for boom light and cab light
  • Exterior lights
  • Cat one key security system
  • Door locks
  • Cap locks on fuel and hydraulic tanks
  • Lockable external tool/storage box
  • Signaling/warning horn
  • Secondary engine shutoff switch
  • Openable skylight
  • Rearview camera-ready

Optional Equipment

  • Quick drains, engine and hydraulic oil
  • Control pattern quick-changer, two way
  • Auxiliary hydraulics
  • Boom and stick lines
  • High-pressure line
  • Medium-pressure line
  • Cat quick coupler line - high-pressure capable
  • Boom lowering and stick lowering control device
  • Cat Bio hydraulic oil
  • Cab hatch emergency exit
  • Seat, high-back air suspension with heater and cooling
  • Seat, high-back air suspension with heater
  • Seat, high-back mechanical suspension
  • Windshield wiper, lower with washer
  • Air pre-filter
  • Left pedal
  • Straight travel pedal
  • Rain protector
  • Cab mirror
  • Ashtray
  • 500 mm (20") triple grouser shoes
  • 700 mm (28") triple grouser shoes
  • Full-length track guiding guard
  • Guard, heavy-duty bottom
  • Segmented (2 piece) track guiding guard
  • Quick coupler
  • Bucket linkage, without lifting eye
  • 2.6 m (8'6") stick
  • HID lights, cab mounted with time delay
  • FOGS, bolt-on
  • Side steel bumper
  • Guard, cab front, mesh
  • Rearview camera
  • Cat Grade Control Depth and Slope
  • Product Link



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