320E LRR

The 320E RR, with its 6’7” tail swing, works efficiently in tight spaces, while retaining a full-size cab and excellent service access. Lift capacity has been increased by up to 5 percent, and a new lower emissions engine improves fuel efficiency. An enhanced operator station, new safety features and numerous serviceability improvements help you optimize productivity, uptime and profit potential.

Engine Model Cat® C6.6 ACERT™
Net Flywheel Power 153.0 hp
Bore 4.1 in
Stroke 5.0 in
Displacement 403.0 in3
Gross Power - SAE J1995 164.0 hp
Net Power - SAE J1349 153.0 hp

Operating Weight 56440.0 lb
Maximum Operating Weight** 56440.0 lb
Maximum Weight 56440.0 lb
Minimum Operating Weight* 52250.0 lb
Minimum Weight 52250.0 lb

Maximum Drawbar Pull 46086.0 lb
Maximum Travel Speed 3.5 mph

Hydraulic System
Pilot System - Maximum Flow 6.4 gal/min
Pilot System - Maximum Pressure 569.0 psi
Boom Cylinder - Bore 4.7 in
Boom Cylinder - Stroke 49.6 in
Stick Cylinder - Bore 5.5 in
Stick Cylinder - Stroke 59.2 in
B1 Bucket Cylinder - Bore 4.7 in
B1 Bucket Cylinder - Stroke 43.5 in
Main System - Maximum Flow (Total) 113.1 gal/min
Maximum Pressure - Equipment - Heavy Lift 5511.0 psi
Maximum Pressure - Equipment - Normal 5076.0 psi
Maximum Pressure - Swing 3626.0 psi
Maximum Pressure - Travel 5076.0 psi

Service Refill Capacities
Fuel Tank Capacity 76.6 gal
Cooling System 7.9 gal
Swing Drive 2.1 gal
Final Drive (each) 2.1 gal
Hydraulic System (including tank) 54.2 gal
Hydraulic Tank 30.4 gal
Engine Oil (with filter) 6.1 gal

Sound Performance
Operator Noise (Closed) - ISO 6396 71.0 dB(A)
Spectator Noise - ISO 6395 103.0 dB(A)

Brakes ISO 10265 2008
Cab/FOGS ISO 10262 1998
Cab/ROPS ISO 12117-2 2008

Swing Mechanism
Swing Speed 11.2 RPM
Swing Torque 45581.0 lb ft

Number of Shoes (each side) - Long Undercarriage 49 pieces
Number of Track Rollers (each side) - Long Undercarriage 8 pieces
Number of Carrier Rollers (each side) - Long Undercarriage 2 pieces

Reduced emissions, economical and reliable performance


Cat® C6.6 ACERT™ Engine
The Cat C6.6 ACERT engine delivers more horsepower using less fuel than the previous series engine.

Emissions Solution
Equipped to meet U.S. Tier 4 emission standards, the 320E LRR’s C6.6 ACERT engine features an aftertreatment regeneration solution that requires no operator intervention. The regeneration process automatically starts once the filtering system reaches a certain level - with no interruption to machine performance or the work process.

Biodiesel-Ready Fuel System
The C6.6 ACERT engine is equipped with an electronic-controlled high-pressure fuel system that includes an electric priming pump and three-layer fuel hoses to allow the use of biodiesel (meeting ASTM 6751 or EN 14214) up to B20 (biodiesel 20% mixture).

Cooling System
The cooling system features an air-to-air aftercooler and A/C condenser positioned for easy servicing; the viscous fan automatically adjusts to ambient temperatures to help reduce fuel consumption and noise.

Speed and Power Control
The 320E LRR features speed control to maintain a constant speed - regardless of load - to improve fuel economy. Three different power modes are offered: high power, standard power, and economy power. The operator can easily change between modes through the monitor or console switch to meet the needs for the job at hand - all to help manage and conserve fuel.

Operator Station
Comfort and convenience to keep people productive

Operator Station

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

The right and left joystick consoles (1) can be adjusted to meet individual preferences, improving operator comfort and productivity during the course of a day. With the touch of a button, one-touch idle reduces engine speed to help save fuel; touch it again or move the joystick and the machine returns to normal operating level.

The 320E LRR is equipped with a 7" LCD (Liquid Crystal Display) monitor (2) that’s 40% bigger than the previous model’s with higher resolution for better visibility. In addition to an improved keypad and added functionality, it’s programmable to provide information in a choice of 42 languages to support today’s diverse workforce. An “Engine Shutdown Setting” accessible through the monitor allows owners and operators to specify how long the machine should idle before shutting down the engine, which can save significant amounts of fuel. The image of the rearview camera is displayed directly on the monitor. Up to two different camera images can be displayed on the screen.

Power Supply
Two 12-volt power supply sockets are located near key storage areas for charging electronic devices.

Storage spaces are located in the front, rear, and side consoles. A specific space near the auxiliary power supply holds MP3 players and cell phones. The drink holder accommodates large mugs with handles, and a shelf behind the seat stores large lunch or toolboxes.

Automatic Climate Control
The climate control system features five air outlets with positive filtered ventilation, which makes working in the heat and cold much more pleasant.

Reduced Radius
Designed for high maneuverability in confined spaces

Reduced Radius

Reduced Radius
The 320E LRR’s tail swing radius is 2080 mm (6'10") compared to 2830 mm (9'3") on the 320E. When rotated 90 degrees and working over the side, just 500 mm (1'6")* hangs over the side, allowing the 320E LRR to work well in road construction applications and other space-restricted areas. *With 790 mm (31") shoe.

The 320E LRR offers a stable platform for all applications. When compared to 320E L, the 320E LRR delivers up to 16% additional lift over the side with the heavier counterweight. One of the main contributors is the use of an additional counterweight, which allows the balance of the machine to be comparable to a standard machine with a longer tail swing.

While the length of the upper structure is reduced to accommodate the work at hand, the cab of the 320E LRR is the same size with all the amenities and attachments found inside the 320E L.

Power to move more dirt, rock, and debris with speed and precision


Hydraulic Horsepower
Hydraulic horsepower is the actual machine power available to do work through implements and work tools. It’s much more than just the engine power under the hood - it’s a core strength that differentiates Cat machines from other brands.

Hydraulic Pumps
The 320E LRR uses a two-pump, high-pressure hydraulic system to tackle the toughest work in short order. A highly efficient and simple back-to-back main control valve improves fuel consumption and allows for greater tool versatility.

Heavy Lift
The 320E LRR features a heavy lift function to give more lift capacity over the front. With a touch of a button, pressure increases and engine speed reduces to give better control in lifting those extra-tough-to-move materials like concrete pipe and road construction barriers.

Swing Priority Circuit
The swing priority circuit on the 320E LRR uses an electric valve that’s operated by the machine’s Electronic Control Module (ECM). Compared to using a hydraulic valve, an electric valve allows for more finely tuned control, which is critical during material loading.

Electric Boom Regeneration Valve
This valve minimizes pump flow when the boom lowers down, which helps improve fuel efficiency. It is optimized for any dial speed setting being used by the operator, which results in enhanced boom lowering speed for greater controllability.

Structures & Undercarriage
Built to work in rugged environments

Structures & Undercarriage

The 320E LRR features a solid foundation that’s built to absorb the stresses of every day work. The main frame utilizes high-tensile-strength steel and a one-piece swing table to improve strength and reliability. The X-shaped carbody is designed to resist bending and twisting forces. The upper frame includes reinforced mountings to support the Roll-Over Protective Structure (ROPS) cab; the lower frame is reinforced to increase component durability.

The undercarriage is built to support various work applications. Precision-forged carrier rollers, press-fit pin master joints, and enhanced track shoe bolts improve durability and reduce the risk of machine downtime and the need and cost to replace components. Heavy-duty rollers and idlers are sealed and lubricated to extend service lift. Track links are assembled and sealed with grease to decrease internal wear and increase life compared to dry seal undercarriage. Also, a segmented two-piece guiding guard is now offered to help maintain track alignment and improve performance in multiple applications.

Two counterweight options are available: 6.2 mt (6.8 ton) and 6.9 mt (7.6 ton). Integrated links enable easy removal of the counterweight for maintenance or shipping.

Front Linkage
Made for high stress and long service life

Front Linkage

Booms and Sticks
The 320E LRR is offered with a range of booms and sticks (see list below). Each is built with internal baffle plates for added durability, and each undergoes 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. The boom nose retention method is a durable captured flag design. Boom durability is improved with a number of plate thickness changes. Also, the front linkage pins’ inner bearing surfaces are welded, and a self-lubricated bearing is used to extend service intervals and increase uptime.

There are two basic boom options: HD and ES.
  • HD = Heavy Duty - This type of boom is designed to balance reach, digging force, and bucket capacity. It covers the vast majority of applications such as digging, loading, trenching, and working with hydraulic tools.
  • ES = Extreme Service - This type of boom is best used for demolition or extreme applications where stress loads on the boom are increased. It should be used for demanding, harsh applications like 100% rock and extensive hammer use.

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 320E LRR.

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.

Integrated Technologies
Solutions that make work easier and more efficient

Integrated Technologies

Cat® Grade Control Depth and Slope
This optional system combines traditional machine control and guidance with standard factory-installed and calibrated components, making the system ready to go to work the moment it leaves the factory. The system utilizes internal front linkage sensors - well protected from the harsh working environment - to give operators real-time bucket tip position information through the cab monitor (1), which minimizes the need and cost for traditional grade checking and improves job site safety. It also helps the operator complete jobs in fewer cycles, which means less fuel use.

Cat Product Link
This optional system is deeply integrated into the machine monitoring system and is designed to help customers improve their overall fleet management effectiveness. Events and diagnostic codes as well as hours, fuel consumption, idle time, machine location, and other detailed information are transmitted to a secure web based application (2 and 3) called VisionLink™, which uses powerful tools to communicate to users and dealers.

Fast, easy and safe access built in


Service Doors
Wide service doors (1) and a one-piece hood (2) provide easy access to the cooling and engine compartments. Both doors and hood feature enhanced hardware and a new screen design to help minimize debris entry.

The compartments are designed to provide technicians with quick access to major components and regular service items like filters. The fresh air filter (3), for example, is located on the side of the cab to make it easy to reach and replace as needed.

Other Service Enhancements
The water separator with water level sensor has a primary fuel filter element located in the pump compartment near ground level. The fuel tank features a remote drain cock located in the pump compartment to make it easy to remove water and sediment during maintenance. The engine oil check gauge is situated in front of the engine compartment for easy access, and a uniquely designed drain cock helps prevent spills. Hydraulic lash adjusters automatically adjust valve opening and closing events to help reduce fuel consumption and engine noise. They also eliminate the need for a valve lash, which reduces maintenance for the customer.

Features to help protect people


The ROPS-certified cab allows a Falling Object Guard Structure (FOGS) to be bolted directly to it.

Sound Proofing
Improved sealing and cab roof lining lower noise levels by 5 dB inside the cab - a significant benefit to operators.

Anti-Skid Plates
The surface of the upper structure and the top of the storage box area are covered with anti-skid plates to help prevent service personnel and operators from slipping during maintenance.

Steps, Hand and Guard Rails
Steps (1) on the track frame and storage box along with extended hand and guard rails (2) to the upper deck enable operators to securely work on the machine.

Time Delay Cab and Boom Lights
After the engine start key has been turned to the “OFF” position, lights will be illuminated to enhance visibility. The time delay can vary from 0 to 90 seconds, which can be set through the monitor.

High Intensity Discharge (HID) Lights
Cab lights can be upgraded to HID for greater visibility.

Two windshield options are available: The 70/30 split configuration features an upper window equipped with handles on the top and both sides so the operator can slide it to store in the ceiling. The lower window is removable and can be stored on the left wall of the cab shell. The large skylight provides great overhead visibility, excellent natural lighting, and good ventilation. The skylight can be opened completely to become an emergency exit.

Monitor Warning System
The machine’s advanced diagnostic system features a buzzer in the monitor to communicate to operators critical events like full filters or low hydraulic fluid levels so they can take immediate action.

Rearview Camera
The standard rearview camera (3) is housed in the counterweight. The image projects through the cab monitor to give the operator a clear view of what is behind the machine.

Complete Customer Care
Service you can count on

Complete Customer Care

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

Machine Selection
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.

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.

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.

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.

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 C6.6 ACERT engine is very quiet and meets U.S. Tier 4 Interim emission standards.
  • The 320E LRR can run 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.
  • Even when operating in high horsepower and high production applications, the 320E LRR performs a similar amount of work as the previous D Series model with much less fuel consumption.
  • A ground-level overfill indicator rises when the tank is full to help the operator avoid spilling.
  • The QuickEvac™ option ensures fast, easy, and secure changing of engine and hydraulic oil.
  • The 320E LRR is built to be rebuilt with major structures and components capable of being remanufactured to reduce waste and replacement costs.
  • An eco-friendly 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 320E LRR is an efficient, productive machine that’s designed to conserve our natural resources for generations ahead.

Standard Equipment

  • C6.6 diesel engine
  • Biodiesel capable
  • EPA Tier 4 Interim
  • 2300 m (7,500 ft) altitude capability
  • 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 switch
  • Starting kit, cold weather, -18° C (0° F)
  • Screen fuel filter in fuel line
  • Primary fuel filter
  • Secondary fuel filter
  • Quick drains, engine and hydraulic oil (QuickEvac)
  • Regeneration circuit for boom and stick
  • Reverse swing dampening 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
  • Capability of installing Cat Bio hydraulic oil
  • Fine swing control
  • Pressurized operator station with positive filtration
  • Mirror package
  • 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 warning, 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)
  • Laminated glass front upper window and tempered other windows
  • Grease Lubricated Track GLT2, resin seal
  • Towing eye on base frame
  • 80 amp alternator
  • Circuit breaker
  • Capability to electrically connect a beacon
  • Boom light with time delay
  • Exterior lights integrated into storage box
  • 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 for emergency exit
  • Rearview camera
  • Travel alarm
  • Product Link

Optional Equipment

  • Starting kit, cold weather, -25° C (-13° F)
  • Jump start receptacle
  • Radiator screen
  • Block heater (jacket water heater)
  • Control pattern quick-changer, two way
  • Additional circuit
  • Boom and stick lines
  • High-pressure line
  • Medium-pressure line
  • Cat quick coupler line - high-pressure capable
  • Electronic Control device, 1/2P, one-way circuit
  • Electronic Control device (Common), 1/2P, common circuit
  • Electronic Control device, 1P, two-way circuit
  • Cab hatch emergency exit
  • Seat, high-back air suspension with heater
  • Seat, high-back mechanical suspension
  • Sunscreen
  • Windshield wiper with washer
  • Left foot switch
  • Left pedal
  • Straight travel pedal
  • 600 mm (24") triple grouser shoes
  • 700 mm (28") triple grouser shoes
  • 790 mm (31") triple grouser shoes
  • Guard, full length for long FG undercarriage
  • Guard, heavy-duty bottom
  • Center track guiding guard
  • Segmented (2 piece) track guiding guard
  • HD track roller
  • 6.2 mt (6.8 t) without lifting eye
  • 6.9 mt (7.6 t) without lifting eye
  • Quick coupler
  • Bucket linkage, B1 family with and without lifting eye
  • 5.7 m (18'7") heavy duty and extreme service booms
  • 2.9 m (9'6") heavy-duty stick
  • Working lights, cab mounted with time delay
  • HID lights, cab mounted with time delay
  • Halogen boom lights
  • FOGS, bolt-on
  • Side rubber bumper
  • Cat MSS (anti-theft device)
  • Cat Grade Control Depth and Slope



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