Excavatoare de talie mica Cat® 311F LRR

The Cat 311F LRR delivers fuel savings and performance - two attributes you need to be successful in your business.

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A Unique Emissions Solution

The Cat C3.4B engine meets today's EU Stage IIIB emission standards. It provides plenty of power for the utility work you do and won't consume a lot of fuel to do it - all to help keep your owning and operating costs to an absolute minimum.

Fuel-Saving Features

One built-in fuel-saving feature is engine idle shutdown, which automatically turns the engine off when it's been idling for more than a specified amount of time. You can also choose eco mode to more actively manage fuel consumption for the job at hand. Both will help you save fuel, reduce emissions, and extend your service intervals.

Biodiesel Ready

The C3.4B engine can run on B20 biodiesel fuel that meets ASTM 6751 or EN 14214 standards - all to give you more potential fuel-saving flexibility.

Proven Technology

Every EU Stage IIIB engine is equipped with a combination of proven electronic, fuel, air, and aftertreatment components. Applying proven technologies lets us meet your high expectations for productivity, fuel efficiency, reliability, and service life. The right technologies fine-tuned for the right applications result in:

  • High performance across a variety of applications
  • Maximized uptime and reduced cost with world-class support from the Cat dealer network
  • Minimized impact of emission systems - designed to be transparent to the operator without requiring interaction
  • Durable designs with long life to overhaul
  • Better fuel economy with minimized maintenance costs while providing the same great power and response

More Powerful, Reliable Engine Electronics

The electronics used in Cat EU Stage IIIB engines are more powerful and robust than ever. Enhanced features increase quality and reliability, which improves your owning and operating experience.

Next Generation Fuel Systems

As a key component of Cat EU Stage IIIB Technology, injection timing provides more control of combustion for the cleanest, most efficient fuel burn.

Innovative Air Management

Cat EU Stage IIIB engines feature innovative air-management systems that optimize airflow and enhance power, efficiency, and reliability. We apply a range of simple, reliable turbo charging solutions based on engine size and application. This allows us to match turbo performance to rated output for high productivity, excellent fuel efficiency, long life, and low operating costs for you.


Efficient Design

Major hydraulic components like pumps and valves are located close together to make it possible to use shorter tubes and lines. This design leads to less friction loss in the lines, reduced pressure drops, and more power to the ground for the work you need to get done.

Control Like No Other

Controllability is one of the main attributes of Cat excavators, and one of the key contributors to this is the main control valve. The valve puts flow where you need it when you need it, which leads to smoother operation, greater efficiency, and lower fuel consumption.

Auxiliary Hydraulics for Added Versatility

This excavator is fitted with a sophisticated auxiliary hydraulic system that makes tool changes quick and easy. Simply select your hydraulic tool from the screen, and maximum flow and pressure will automatically be set so that tool usage is optimized and components are protected. Note that medium pressure flow used for tool rotation is provided by a stand-alone pump, and the benefit to you is that it does not affect multi-operation controllability. Finally, a universal quick coupler circuit can work with either high or medium pressure, allowing the machine to adapt to virtually any quick coupler in the market.

Electric Boom and Stick Regeneration for Added Efficiency

The 311F regenerates the flow of oil from the head end of the boom cylinder to the rod end of the boom cylinder during the work cycle to save energy and improve fuel efficiency. It's optimized for any dial speed setting you select, which results in less pressure loss for higher controllability, more productivity, and lower operating costs. The machine also regenerates the flow of oil from the rod end of the stick cylinder to the head end of the stick cylinder during operation to increase speed.

Complete Customer Care

Worldwide Parts Availability

Cat dealers utilize a worldwide parts network to maximize your machines' uptime. Plus they can help you save money with Cat remanufactured components.

Advice You Can Trust

What are the job requirements and machine attachments? What production is needed? Your Cat dealer can provide recommendations to help you make the right machine choices.

Financial Options Just for You

Consider financing options and day-to-day operating costs. Look at dealer services that can be included in the machine's cost to yield lower owning and operating costs over time.

Support Agreements to Fit Your Needs

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.

Operating Techniques to Boost Your Profits

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

What's Best for You Today…and Tomorrow

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


The 311F LRR is a highly versatile machine that packs a lot of performance into a small package. You can easily expand that performance by utilizing any of the variety of attachments offered by Cat Work Tools.

Change Jobs Quickly

A quick coupler brings the ability to quickly change attachments and switch from job to job.

Dig, Finish and Compact

A wide range of buckets dig everything from top soil to highly abrasive material. For finishing and grading work, compact and shallow ditch cleaning buckets fit the need. A Cat compactor prepares the area for the next phase of construction.

Break, Demolish and Scrap

A hydraulic hammer equips the 311F for breaking sidewalks, driveways, and pavement. A shear allows you to cut metal down to size for recycling or transport.

Move and Handle All Sorts of Material

When your job requires constant material handling, a grapple may be your solution. Choose from three different grapple styles for loading, sorting and picking trash, demolition debris, or recyclables.

Set Up Your Machine for Maximum Profitability

Your Cat dealer can install hydraulic kits to properly operate all Cat Work Tool attachments - maximizing the machine's uptime and your profits.

Reduced Radius

Tight Job, Right Machine

With more and more jobs requiring work in tight spaces, a reduced radius machine is the right choice for you. The 311F LRR's tail swing radius is just 1750 mm. When rotated 90 degrees and working over the side, only 505 mm hangs over the side – ideal when you are working up against a wall, on a narrow road, or other space-restricted area.

Stable Platform

The 311F LRR offers a stable platform for all applications. One of the main contributors is the 2450 kg counterweight. This allows the shorter 311F LRR to perform like a longer tail swing machine.

Comfortable Full-Size Cab

While the length of the upper structure is reduced to accommodate the work at hand, the cab of the 311F LRR is not. It's the same size as our standard machines with all the amenities you've come to expect.

Operator Station

A Safe and Quiet Cab

The Roll-Over Protective Structure (ROPS) certified cab is not only a safety feature, but it is also a sound suppressor due to its special sealing and insulation. With the door and windows closed, you will experience a machine isolated from job site noises.

A Cool (and Warm) Environment

The automatic climate control system features multiple air outlets with filtered ventilation. Air flows on the floor, behind the seat, and in front of you to make your work in either hot or cold weather much more pleasant and productive.

Comfortable Seat Options

The seat range includes air suspension, heated, and air cooled options. Mechanical and air suspension seats include a reclining back, upper and lower slide adjustments, and height and tilt angle adjustments to meet your needs for maximum comfort.

Controls Just for You

The right and left joystick consoles can be adjusted to improve your comfort and productivity during the course of a day. Also, the right joystick features a button that will reduce engine speed when you are not working to help save fuel. Touch it once and speed reduces; touch it again and speed increases for normal operation.

An Easy-to-use Monitor

The LED monitor is easy to see and navigate. Programmable in up to 42 languages to meet today's diverse workforce, the monitor clearly displays critical information you need to operate efficiently. Plus it projects the image from the standard rearview camera to help you see what's going on around you so you can stay safely focused on the job.

Ample Storage and Auxiliary Power

Storage spaces are located in the front, rear, and side consoles of the cab. A drink holder accommodates a large mug with handle, and a shelf behind the seat stores large lunch or toolboxes. Power supply sockets are conveniently located near the key storage areas for charging your electronic devices like an MP3 player, a cell phone, or a tablet.


A Safe and Quiet Cab

You will benefit from the enhanced protection of a ROPS-certified cab. Not only is it safe, but its special roof lining and sealing make the sound inside comparable to any of today's on-highway trucks.

Secure Contact Points

Your slipping hazards are reduced with anti-skid plates on the surface of the upper structure and the top of the storage box area. The plates are effective in all types of weather conditions, and they can be removed for cleaning. Large steps as well as hand rails allow you to confidently and safely work with the machine. Steps on the track frame will get you into the cab as well as a leg up to the compartments. Extended hand rails allow you to safely climb to the upper deck. An additional hand rail above the air cleaner compartment gives you a holding point while standing on the track.

Great Visibility

Ample glass gives you excellent visibility out front and to the side, and the standard rearview camera gives you a clear field of view behind the machine through the cab monitor. The available 70/30 split-configuration windshield features an upper window with handles that make it easy to slide and store above you and a lower window that can be removed and stored on the inside wall of the cab. The large skylight provides you with enhanced visibility and also serves as an emergency exit. Halogen lights provide plenty of illumination and can be programmed to stay on for up to 90 seconds after the engine has been turned off to help you safely exit the machine.

A Worthwhile Guard Option

Optional FOGS (Falling Object Guards Systems) protect your operator and cab windows from debris damage, enhancing safety. It consists of two separate top and front guards. The front guard is easily opened to facilitate regular cleaning of the cab windshield.

Integrated Technologies

Cat Connect makes smart use of technology and services to improve your job site efficiency. Using the data from technology-equipped machines, you'll get more information and insight into your equipment and operations than ever before. Cat Connect technologies offers improvements in these key areas: Equipment Management - increase uptime and reduce operating costs. Productivity - monitor production and manage job site efficiency. Safety - enhance job site awareness to keep your people and equipment safe. Featured Cat Connect technologies include:


Link technologies provide wireless capability to machines enabling two-way transfer of information collected by on-board sensors, control modules, and other Cat Connect technologies using off-board apps, such as our VisionLink® software.

Manage Your Machine Remotely

Cat Product Link™ is an optional system that is deeply integrated into the machine monitoring system to take the guesswork out of managing your equipment. The system tracks location, hours, fuel usage, productivity, idle time, and diagnostic codes through the online VisionLink interface to help you maximize efficiency, improve productivity, and lower operating costs. Manage the data yourself or get expert advice from your Cat dealer to keep your equipment operating at peak performance.


Ground-Level Access Built In

You can easily reach most routine maintenance items like fuel and oil filters, fluid taps, and grease points from the safety and convenience of ground level. Not only do compartments feature wide service doors designed to help prevent debris entry, but they also securely latch in place to help make your service work simpler.

A Cool Design

The unique cooling package includes a screen between the radiator and AC condenser to prevent plugging. In addition, wider clearance is provided between the radiator and A/C condenser to help make blowing off debris easy for you, which can help improve your machine's reliability and performance in high ambient conditions.

A Fresh Idea

When you select ventilation inside the cab, outside air enters through the fresh air filter. The filter is conveniently located on the side of the cab to make it easy to reach and replace, and it is protected by a lockable door that can be opened with the engine key.

Other Service Benefits

The fuel tank's drain cock makes it easy and simple for you to remove water and sediment during routine maintenance. Plus an integrated fuel level indicator pops up to help you reduce the possibility of fuel tank overfilling.

Front Linkage

Booms and Sticks

The 311F LRR is offered with a 4.3 m reach boom and two stick configurations: an R2.8m and an R2.25m. The reach boom offers you excellent all-around versatility and a large working envelope. The longer stick is best for when you need deep trenching, longer reach, and top truck loading capabilities. The shorter stick provides greater breakout force and increases productivity when you primarily plan on using hydro mechanical work tools.

Built to Last

All Cat booms and sticks are built with internal baffle plates for added durability, and all undergo ultrasound inspection to ensure weld quality and reliability. Large box-section structures with thick multi-plate fabrications, castings, and forgings are used in high-stress areas such as the boom nose, boom foot, boom cylinder, and stick foot to improve durability. Also, the front linkage pins' inner bearing surfaces are welded with a self-lubricated bearing used to extend service intervals and increase uptime.

Structures and Undercarriage

Robust Frames

The 311F LRR is a well-built machine that's designed to give you a long service life. The upper frame includes special mountings made specifically to support the heavy-duty cab; the lower frame is reinforced to enhance component durability so you can count on the machine doing the work you need done.

Durable Undercarriage

Long undercarriage is standard and works extremely well in various work applications and conditions. Track shoes, links, rollers, idlers, and final drives are all built with high tensile-strength steel for long-term durability.

Great Weight

The pressed 2450 kg counterweight provides plenty of balance for your heavy lifting operations. It also has an integrated housing to protect the standard rearview camera.

Specificatii tehnice


Engine Model Cat® C3.4B
Flywheel Power 52 kW
Bore 99 mm
Stroke 110 mm
Displacement 3.4 l
Maximum Gross Power - ISO 14396 (metric) 54 kW
Net Power - ISO 14396 - Metric 54 kW
Net Power - ISO 9249 - Metric 52 kW
Gross Power - SAE J1995 - Metric 55 kW
Operating Weight 13900 kg
Minimum Operating Weight 12400 kg
Maximum Operating Weight 13900 kg
Swing Speed 10 r/min
Maximum Drawbar Pull 114 kN
Maximum Travel Speed - Low 3.6 km/h
Maximum Travel Speed - High 5.4 km/h
Maximum Travel Speed 5.4 km/h
Hydraulic System
Maximum Pressure - Travel 35 MPa
Maximum Pressure - Swing 23 MPa
Pilot System - Maximum Flow 21.9 l/min
Pilot System - Maximum Pressure 4120 kPa
Boom Cylinder - Bore 100 mm
Boom Cylinder - Stroke 1002 mm
Stick Cylinder - Bore 110 mm
Stick Cylinder - Stroke 1194 mm
Bucket Cylinder - Bore 100 mm
Bucket Cylinder - Stroke 939 mm
Maximum Pressure - Equipment 30.5 MPa
Main System - Maximum Flow - Total 125 × 2 L/min (33 × 2 gal/min)
Service Refill Capacities
Cooling System 18 l
Swing Drive - Each 3 l
Final Drive - Each 3 l
Hydraulic Tank Oil 95 l
Engine Oil - With Filter 8 l
Fuel Tank Capacity 210 l
Hydraulic System Oil - Including Tank 160 l
Exterior Sound Power Level - ISO 6395:2008* 99 dB(A)
Operator Sound Pressure Level - ISO 6396:2008 72 dB(A)
Note *European Union Directive “2000/14/EC” as amended by “2005/88/EC,” with the cooling fan speed set at 70% of maximum value.
Number of Carrier Rollers - Each Side 1 piece
Number of Shoes - Each Side 43 pieces
Number of Track Rollers - Each Side 6 pieces
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