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CAT Hydraulic Excavator 349D2

The 349D2 offers outstanding performance, excellent control, high stick and bucket forces, impressive lift capacity, simplified service and a comfortable operator station to increase your productivity and lower operating costs.

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The 349D2 offers outstanding performance, excellent control, high stick and bucket forces, impressive lift capacity, simplified service and a comfortable operator station to increase your productivity and lower operating costs.


157.0 mm
12.5 L
Gross Power
305.0 kW
Net Power - EEC 80/1269
283.0 kW
130.0 mm
Net Power - SAE J1349
283.0 kW
Flywheel Power
283.0 kW
Net Power - ISO 9249
283.0 kW
Engine Model
Cat® C13 ACERT™

Hydraulic System

Maximum Pressure - Travel
35000.0 kPa
Maximum Pressure - Swing
31400.0 kPa
Pilot System - Maximum Flow
43.0 L/min
Pilot System - Maximum Pressure
4110.0 kPa
Main System - Maximum Flow (Total)
734.0 L/min
Maximum Pressure - Equipment
35000.0 kPa
Boom Cylinder - Bore
160.0 mm
Boom Cylinder - Stroke
1440.0 mm
Stick Cylinder - Bore
190.0 mm
Stick Cylinder - Stroke (for Long Reach and Reach fronts)
1778.0 mm
Stick Cylinder - Stroke (for Mass Excavation fronts)
1758.0 mm
TB Family Bucket Cylinder - Bore
160.0 mm
TB Family Bucket Cylinder - Stroke
1356.0 mm
UB Family Bucket Cylinder - Bore
170.0 mm
UB Family Bucket Cylinder - Stroke
1396.0 mm


Operating Weight - Long Undercarriage
47122.0 kg
Operating Weight*
47122.0 kg


Number of Track Rollers (each side) - Standard
Number of Track Rollers (each side) - Variable Gauge
Number of Carrier Rollers (each side) - Long - Fixed
Number of Carrier Rollers (each side) - Standard
Number of Carrier Rollers (each side) - Variable Gauge
Number of Shoes (each side) - Long - Fixed
Number of Shoes (each side) - Standard
Number of Shoes (each side) - Variable Gauge
Number of Track Rollers (each side) - Long - Fixed

Service Refill Capacities

Engine Oil
42.0 L
Swing Drive
10.0 L
Final Drive
15.0 L
Hydraulic Tank
243.0 L
Hydraulic System (Including Tank)
570.0 L
Cooling System
35.5 L
Fuel Tank
705.0 L


Maximum Drawbar Pull
338.0 kN
Maximum Travel Speed
4.5 km/h

Sound Performance

ANSI/SAE J1166 MAY90 Meets OSHA and MSHA Requirements


SAE J1356 FEB 88 and ISO 10262-1998
SAE J1026 APR90

Swing Mechanism

Swing Torque
149.0 kN·m
Swing Speed
8.7 RPM

C13 Engine With Acert™ Technology

Built for power, reliability, economy and low emissions.


The 349D2, equipped with the C13 with ACERT Technology provides 283 kW horsepower.


ACERT Technology is a differentiated technology that reduces emissions at the point of combustion. The technology capitalizes on Caterpillar’s proven leadership in three core engine systems: fuel, air and electronics.

Fuel System

The Cat® C13 features electronic controls that govern the mechanically actuated unit fuel injection (MEUI) system. MEUI provides the high-pressure required to deliver better fuel economy through finer fuel atomization and more complete combustion.

ADEM™ A4 Engine Controller

The ADEM™ A4 electronic control module manages fuel delivery to get the best performance per liter of fuel used. The engine management system provides flexible fuel mapping, allowing the engine to respond quickly to varying application needs. It tracks engine and machine conditions while keeping the engine operating at peak efficiency.


The Cat® C13 uses a wastegate turbocharger for improved performance.

The wastegate valve controls excessive engine boost pressure by allowing exhaust to bypass the exhaust-side turbine. The wastegate also reduces turbine wear in high RPM; low load conditions and optimizes air and fuel delivery for peak engine performance. The turbocharger increases the density of the air, enabling the engine to produce more power with few effects from altitude.

Low Sound and Vibration Levels

The engine mounts are rubber-isolating mounts matched with the engine package to provide optimum sound and vibration reduction. Further noise reduction has been achieved through design changes to the isolated top cover, oil pan, multiple injection strategy, insulated timing cover, sculpted crankcase.

Air Cleaner

The radial seal air filter features a double-layered filter core for more efficient filtration and is located in a compartment behind the cab. A warning is displayed on the monitor when dust accumulates above a preset level.


Cat® hydraulics deliver power and precise control to keep material moving.

Pilot System

The pilot pump is independent from the main pumps and controls the front linkage, swing and travel operations. The pilot control valve operation is proportional to control lever movement, delivering outstanding controllability.

Component Layout

The component location and hydraulic system design provide the highest level of system efficiency. The main pumps, control valve and hydraulic tank are located as close to each other as possible. This design makes it possible to use shorter tubes and lines between components, reducing friction losses and pressure drops.

Hydraulic Cross-Sensing System

The hydraulic cross sensing system utilizes each of two hydraulic pumps to 100 percent of engine power under all operating conditions. This improves productivity with faster implement speeds and quicker, stronger pivot turns.

Boom and Stick Regeneration Circuits

A hydraulically operated stick regeneration circuit saves energy and improves multi-function performance during the stick-in operation. New on the 349D L, the boom regeneration circuit is operated electrically, and this system is managed by the machine ECM. The system improves cycle times and fuel efficiency, increasing your productivity and reducing operating costs.

Boom and Swing Priority

The hydraulic system on the 349D L provides automatic priority function for boom-up and swing operations eliminating the need for work mode buttons. When the boom or swing lever is activated, the system automatically assigns priority based on operator demand.

Hydraulic Cylinder Snubbers

Snubbers are located at the rod-end of the boom cylinders and both ends of the stick cylinders to cushion shocks while reducing sound levels and extending component and structure life.

Operator Station

Designed for simple, easy operation, the 349D L allows the operator to focus on production. The spacious, quiet and comfortable operator station assures high productivity during a long work day.

Switches, dials and controls are conveniently located within easy reach of the operator. The monitor is easy to see and helps maximize visibility. The standard air suspension seats adjust to suit the operator’s size and weight. The pressurized cab provides positive filtered ventilation and fresh or recirculated air can be selected. Visibility is maximized with the elimination of window frames for all glass except the rear window. A large, polycarbonate skylight offers excellent upward visibility.

Hydraulic Activation Control Lever

For added safety, the hydraulic activation control lever must be in the operate position to activate the machine control functions.


The 349D2 uses pilot operated control levers positioned so the operator can operate with arms on the armrests. The vertical stroke is longer than the horizontal to reduce operator fatigue. Joysticks with integrated buttons and sliding switches control all implement and swing functions. The sliding switches modulate control for hydro-mechanical tools and help increase operator comfort and reduce fatigue.

Prestart Check and Monitor Display

Prior to starting the machine, the system checks for low engine oil, hydraulic oil and engine coolant fluid levels and will warn the operator through a color Liquid Crystal Display (LCD) monitor. The LCD monitor displays vital operating and performance information in 27 different languages for operator convenience.

Cab Exterior

The exterior design uses thick steel tubing along the bottom perimeter of the cab, improving the resistance of fatigue and vibration. This design allows the FOGS to be bolted directly to the cab, at the factory or as an attachment later, enabling the machine to meet specifications and job site requirements.

Cab Mounts

The cab shell is attached to the frame with viscous rubber cab mounts, which dampen vibrations and sound levels while enhancing operator comfort.


Durable undercarriage absorbs stresses and provides excellent stability.

Undercarriage Options

Track with Positive Pin Retention 2 (PPR2) and cast idlers are available on the 349D L. The PPR2 prevents loosening of the track pin from the track link and the cast idler is designed for extended life. Both options are ideal for extreme applications or those that require a large amount of travel.

Travel Motors

Two-speed axial piston hydraulic motors provide the 349D L drive power and automatic speed selection when the high-speed position is selected. This enables the machine to automatically change between computer-controlled high and low speeds depending on drawbar-pull requirements.

Straight-Line Travel Circuit

The straight-line travel circuit is incorporated into the hydraulic system, which maintains low-speed, straight-line travel, even when operating the front linkage.

Final Drive

The three-stage planetary reduction final drives design results in a complete drive/brake unit that is compact and delivers excellent performance and reliability.


The 349D2 comes standard with a grease lubricated track called GLT4. The track links are assembled and sealed with grease to decrease internal bushing wear, reduce travel noise and extend service life lowering operating costs. The track link for the 349D L has been re-designed to avoid the concentration of stresses and improve durability and reliability.

Track Guards

The idler guard and bolt-on center guard are standard equipment. They help maintain track alignment while traveling or working on slopes. For applications that require additional track protection or alignment, optional guarding is available.


The 349D2 structural components are the backbone of the machine’s durability.


The 349D2 has three undercarriage options to meet regional transportation requirements and application needs.

Standard and Long fixed gauge for narrow transport and weight sensitive areas. Variable gauge for increased track and ground clearance and over-side lift.

Upper Frame

The rugged main frame is designed for maximum durability. Robot welding is used for consistent, high-quality welds. The main channels are box sections connected by a large diameter tube in the boom foot area to improve rigidity and strength. The outer frame utilizes curved side rails for rigidity against bending and torsional loads.


The 349D2 has several counterweight options to best match the machine to your application.

Track Roller Frame

Fixed Gauge Undercarriage. Uses a press-formed, pentagonal section for the track frame that is robot-welded for weld consistency and quality. The track frame has been designed so that the top of the track frame has a steep angle to help prevent accumulation of mud and debris. Variable Gauge Undercarriage. The track roller frame is made of thick steel plate that is bent into a U-shape and welded to the bottom plate to create a box structure. The box structure design for increased rigidity and impact resistance.

Booms, Sticks and Attachments

Designed for maximum flexibility to keep productivity and efficiency high on all jobs.

Front Linkage Attachments

Three lengths of booms and five types of sticks are available, offering a range of configurations suitable for a wide variety of application conditions.

Boom Construction

The 349D booms have large cross-sections and internal baffle plates to provide long life durability. Forged steel is used in critical high-load areas such as the boom-foot and boom cylinder connection.

7.4 M Long Reach Boom

The Long Reach boom when combined with the 4.3 m stick provides an 8.9 m of dig depth. This boom/stick combination has a significantly reduced transport height, eliminating the need to remove the stick cylinder pin.

6.9 M Reach Boom

The Reach boom is designed to balance reach, digging force bucket capacity, offering a wide range of applications as digging, loading and trenching.

6.55 M Mass Excavation Boom

The Mass boom is designed to provide maximum digging forces, bucket capacity and truck loading productivity. The mass boom comes with two stick options for further job site versatility.

Stick Construction

The 349D L sticks are made of high-tensile strength steel, use a large box section design, interior baffle plates and an additional bottom guard to provide years of service under the most demanding applications.

Power Link

The 349D2 power link improves durability, increases machine-lifting capability in key lifting positions, and is easier to use compared to the previous lift bar designs.

Work Tools

Solutions for your business.

Increase Machine Versatility

The Cat combination of machine and tool provides a total solution for just about any application. Work tools can be mounted directly to the machine or a quick coupler can be added, making it quick and easy to release one work tool and pick up another.


Caterpillar offers two quick coupler styles: dedicated and pin grabber. Each allows quick tool changes.

Cat Center-Lock™ Pin Grabber Coupler

Center-Lock is the Cat pin grabber style coupler and features a patent pending locking system. A highly visible secondary lock clearly shows the operator when the coupler is engaged or disengaged from the bucket or work tool.

Work Tools

An extensive range of Cat Work Tools for the 349D L includes buckets, hammers, grapples, shears, multi-processors and rippers. Each are designed to optimize the versatility and performance of your machine. Cat Work Tools and couplers are ready to work in a variety of applications, such as site and structure demolition, debris clean-up, truck loading, scrap processing, breaking road surfaces and bed rock.

Hydraulic Kits

Caterpillar offers field-installed hydraulic kits designed to simplify the process of ordering and installing the right kit. Modular kit designs integrate Cat Work Tools with Cat Hydraulic Excavators. Every kit is easy to install. Hoses are pre-made, tubes are pre-bent and pre-painted and there are comprehensive instructions.


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

Maintenance Services

Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling, Coolant Sampling and Technical Analysis help you avoid unscheduled repairs.


Repair, rebuild, or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice

Buckets and Teeth

Designed and built for total system performance.

Optimized Package

Caterpillar offers a wide range of buckets, each designed and field tested to function as an integral part of your excavator. All Cat Buckets feature K Series™ GET (Ground Engaging Tools). Buckets are available in four levels of durability and are built to take full advantage of the machine's power.

General Duty (GD)

General Duty buckets are designed for use in low impact, lower abrasion materials such as dirt, loam and mixed compositions of dirt and fine gravel.

Heavy Duty (HD)

Heavy Duty buckets are the most popular and a good “centerline” choice. This bucket style is a good starting point when application conditions are not known. Heavy Duty buckets are designed for a wide range of impact and abrasion conditions including mixed dirt, clay and rock.

Severe Duty (SD)

Severe Duty buckets are designed for higher abrasion conditions such as shot granite. When compared to the Heavy Duty bucket, wear bars and wear plates are substantially thicker and larger for added protection.

Extreme Duty (XD)

Extreme Duty buckets are designed for very high abrasion conditions such as granite quarries. Corner shrouds have been added and side wear plates are larger for added protection.


A wide variety of optional and factory-installed attachments are available to enhance performance and improve job site management.

Tool Control System

The optional tool control system maximizes work tool productivity by configuring hydraulic flow, pressure, and operator controls to match a specific work tool. System versatility enables a wide range of tools to be used.

Control Levers

The operator’s control lever preferences are diverse. Three types of tool controls are available:

Foot Pedal – The hydraulic modulated foot pedal is used in conjunction with the hydraulic controller.

Foot Switch – The electric on/off switch pedal is used in conjunction with either the hydraulic controller or attachment controller. The foot switch is located on cab floor.

Tool controller joysticks – Two types of the tool control joysticks are available. Joystick with modulation contains two on/off switches, one trigger switch and one modulation switch. Joystick without the modulation switch has three on/off switches and one trigger switch.

Auxiliary Hydraulic Valve

A hydraulically controlled auxiliary valve is standard on the 349D L. Control circuits are available as attachments, allowing operation of high and medium pressure tools such as shears, grapples, hammers, pulverizers, multi-processors and vibratory plate compactors.

Machine Security

An optional Machine Security System is available from the factory on the 349D L. This system controls when the machine can be operated and utilizes specific keys to prevent unauthorized machine use, a significant theft deterrent.

Product Link

Product Link is available as an option on the 349D L. The optional levels of service, including Asset Watch, Maintenance Watch, and Health Watch allow you to monitor and maintain your equipment for the lowest operating cost.

Service and Maintenance

Simplified service and maintenance save you time and money.

Extended Service Intervals

Extended service and maintenance intervals increase machine availability. The maintenance intervals for engine oil and engine oil filter have been extended to 500 hours.

Capsule Filter

The hydraulic return filters are located in the hydraulic tank. The filter elements are removable without spilling hydraulic oil.

Pilot Hydraulic System Filter

Pilot hydraulic system filter keeps contaminants from the pilot system and is located in the pump compartment.

Radial Seal Main Air Cleaner

Radial seal main air cleaner with precleaner has a double-layered filter element for more efficient filtration. No tools are required to change the element.

Fuel-Water Separator

The water separator has a primary fuel filter element and is located in the air cleaner compartment for easy access from the ground.

Service Points

Service points are centrally located with easy access to facilitate routine maintenance.

Oil Sample and Pressure Ports

Oil sample and pressure ports provide easy checking of machine condition and are standard on every machine.

Greasing Points

A concentrated remote greasing block on the boom delivers grease to hard-to-reach locations.

Complete Customer Support

Cat dealer services help you operate longer with lower costs.

Product Support

You will find nearly all parts at our dealer parts counter. Cat dealers utilize a worldwide computer network to find in-stock parts to minimize machine downtime. You can save money with Cat remanufactured components.

Machine Selection

Make detailed comparisons of the machines you are considering before you buy. What are the job requirements, machine attachments and operating hours? What production is needed? Your Cat dealer can provide recommendations.


Look past initial price. Consider the financing options available as well as day-to-day operating costs. This is also the time to look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run.

Customer Support Agreements

Cat dealers offer a variety of product support agreements, and work with customers to develop a plan that best meets specific needs. These plans can cover the entire machine, including attachments, to help protect the customer’s investment.


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

Maintenance Services

Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling, Coolant Sampling and Technical Analysis help you avoid unscheduled repairs.


Repair, rebuild or replace? Your Cat Dealer can help you evaluate the cost involved so you can make the right choice.


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