Engine Model Cat® C3.4B
Flywheel Power 70.0 hp
Bore 3.9 in
Stroke 4.33 in
Displacement 207.0 in3
Gross Power - SAE J1995 74.0 hp
Net Power - SAE J1349 70.0 hp
Operating Weight 30600.0 lb
Maximum Operating Weight 30600.0 lb
Minimum Operating Weight 27300.0 lb
Maximum Drawbar Pull 25700.0 lb
Maximum Travel Speed 3.4 mph
Maximum Travel Speed - High 3.4 mph
Maximum Travel Speed - Low 2.2 mph
Pilot System - Maximum Pressure 598.0 psi
Boom Cylinder - Bore 4.0 in
Boom Cylinder - Stroke 39.0 in
Stick Cylinder - Bore 4.0 in
Stick Cylinder - Stroke 47.0 in
Bucket Cylinder - Bore 4.0 in
Bucket Cylinder - Stroke 37.0 in
Main System - Maximum Flow (Total) 125 × 2 L/min (33 × 2 gal/min)
Maximum Pressure - Equipment 4424.0 psi
Maximum Pressure - Swing 3336.0 psi
Maximum Pressure - Travel 5076.0 psi
Pilot System - Maximum Flow 21.9 L/min (1,336 in3/min)
Service Refill Capacities
Cooling System 4.76 gal
Swing Drive (each) 0.79 gal
Final Drive (each) 0.79 gal
Hydraulic System (including tank) 42.3 gal
Hydraulic Tank 25.1 gal
Engine Oil (with filter) 2.1 gal
Fuel Tank Capacity 55.48 gal
ISO 6395 - Spectator Noise 99.0 dB(A)
ISO 6396 - Operator Noise (Closed) 72.0 dB(A)
Number of Carrier Rollers (each side) 1 piece
Number of Shoes (each side) 43 pieces
Number of Track Rollers (each side) 6 pieces
Swing Speed 10.0 RPM
Swing Torque 22791.0 lb ft
The right choice for your space-restricted work
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 RR’s tail swing radius is just 1750 mm (5'9"). When rotated 90 degrees and working over the side, only 505 mm (1'8") 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 RR offers a stable platform for all applications. One of the main contributors is the 2.45 mt (5,400 lb) counterweight. This allows the shorter 311F RR 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 RR is not. It’s the same size as our standard machines with all the amenities you’ve come to expect.
Powerful and fuel efficient to meet your expectations
A Unique Emissions Solution
The Cat C3.4B engine meets U.S. EPA Tier 4 Final 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 up to B20 biodiesel fuel that meets ASTM 6751 standards - all to give you more potential fuel-saving flexibility.Proven Technology
More Powerful, Reliable Engine Electronics
Every U.S. EPA Tier 4 Final ACERT™ 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 results 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
The electronics used in Cat Tier 4 Final 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 Tier 4 Technology, injection timing provides more control of combustion for the cleanest, most efficient fuel burn. To maximize your value, Caterpillar engineers specified fuel systems based on the power and performance demands for each engine.Innovative Air Management
Cat Tier 4 Final 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.
Made to move your material with speed and precision
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 opens slowly when your range of joystick lever movement is small and opens rapidly when movement is high. It 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
Auxiliary hydraulics give you greater tool versatility so you can take on more work with just one machine, and there are several options from which you can choose. A quick coupler circuit, for example, will allow you to switch from one tool to another in a matter of minutes - all from the comfort and convenience of the cab.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.
Structures and Undercarriage
Built to work in your tough utility applications
The 311F 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 available 2.45 mt (5,400 lb) counterweight has a surface that matches the 311F RR’s overall sleek appearance. It provides plenty of balance for your heavy lifting and is bolted directly to the main frame to ensure rigidity. It also has an integrated housing to protect the optional rearview camera.
Comfort and convenience to keep you productive
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 that’s as quiet as the truck you drive to work.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 cooled options. All 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 LCD 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 optional 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.
Take on your far-reaching or up-close tasks
Boom and Stick
The 311F RR is offered with a 4.3 m (14'1") reach boom and a R2.8 m (9'2") stick. This configuration offers you excellent all-around versatility and a large working envelope.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.
Monitor, manage, and enhance your job site operations
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 offer 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
Link technologies provide wireless capability to machines to enable 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.
Tools to make you productive and profitable
Get the Most Out of One Machine
The 311F RR 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. The Cat Pin Grabber coupler is the secure way to decrease downtime and increase job site flexibility and overall productivity.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
Choose a thumb to work with your bucket and gain the instant ability to move and handle brush, rocks, and debris at your construction site. When your job requires constant material handling, a grapple may be your solution. Choose from three different grapple styles for loading, sorting and picking - whether it be 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.
Features to help protect you day in and day out
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 top pickup trucks. In fact, it’s so quiet you won’t believe the machine is running.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 available rearview camera gives you a clear field of view behind the machine through the cab monitor. The 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
Easy-to-install front and door window vandal guards are available to help protect your machine from unwanted attention. They conveniently store in the lockable box that serves as an anti-skid step up to the engine platform.
Designed to make your maintenance quick and easy
Ground-Level Access Built In
You can easily reach most routine maintenance items like 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 AC 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.
Complete Customer Care
Support you can count on
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.
Generations ahead in every way
- The C3.4B engine meets U.S. EPA Tier 4 Final emission standards.
- The 311F RR performs a similar amount of work while burning less fuel than the previous D Series model. This means more efficiency, less resources consumed, and fewer emissions.
- The 311F 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 service technicians avoid spilling.
- The 311F RR is built to be rebuilt with major structures and components capable of being remanufactured to reduce waste and replacement costs.
- An efficient 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.
- The 311F is an efficient, productive machine that’s designed to conserve our natural resources for the generations ahead.