The D Series incorporates innovations for improved performance and versatility. Increased lifting capacity, improved cycle times and ease of operation lead to increased productivity and lower operating costs.
Engine Model | Cat® C6.6 with ACERT™ Technology |
Net Power | — |
Maximum Travel Speed | — |
Engine Model | Cat® C6.6 with ACERT™ Technology |
Net Power | — |
Gross Power | — |
Bore | — |
Stroke | — |
Displacement | — |
Cylinders | 6 |
Maximum Torque - 1,400 rpm | — |
Net Power - 80/1269/EEC | — |
Net Power - ISO 9249 | — |
Net Power - 1,800 rpm - ISO 9249 | — |
Ratings | — |
Dozer Blade | — |
Outriggers | — |
Counterweight | — |
One-Piece Boom* - Rear Dozer Only | — |
Sticks - Long (2800 mm) | — |
Sticks - Short (2200 mm) | — |
VA Boom* - Rear Dozer Only | — |
Operating Weight | 18 200 to 20 100 kg (40,124 to 44,313 lb) |
One-Piece Boom* - Rear Dozer, Front Outriggers | — |
One-Piece Boom* - Front and Rear Outriggers | — |
Sticks - Medium (2500 mm) | — |
Sticks - Industrial (3300 mm) | — |
VA Boom* - Front and Rear Outriggers | — |
VA Boom* - Rear Dozer, Front Outriggers | — |
Swing Speed | — |
Swing Torque | — |
Maximum Flow - Implement/Travel Circuit | — |
Maximum Pressure - Auxiliary Circuit - High Pressure | — |
Maximum Pressure - Swing Mechanism | — |
Maximum Flow - Auxiliary Circuit - High Pressure | — |
Tank Capacity | — |
Maximum Pressure - Auxiliary Circuit - Medium Pressure | — |
Maximum Pressure - Implement Circuit - Normal | — |
System | — |
Maximum Flow - Swing Mechanism | — |
Maximum Flow - Auxiliary Circuit - Medium Pressure | — |
Maximum Pressure - Implement Circuit - Heavy Lift | — |
Maximum Pressure - Travel Circuit | — |
Drawbar Pull | — |
Maximum Gradeability | 60% |
Creeper Speed - 2nd Gear | — |
Creeper Speed - 1st Gear | — |
Forward/Reverse - 2nd Gear | — |
Forward/Reverse - 1st Gear | — |
Cooling | — |
Engine Crankcase | — |
Rear Axle - Housing (Differential) | — |
Front Steering Axle - Differential | — |
Final Drive | — |
Powershift Transmission | — |
Fuel Tank | — |
Standard | 1) 10.00-20 (dual pneumatic) |
Optional | 1) 11.00-20 (dual pneumatic) 2) 18 R 19.5 XF (single pneumatic) 3) 10.00-20 (dual solid rubber) |
Ground Clearance | — |
Minimum Turning Radius - Wide Axle - End of One-Piece Boom | — |
Minimum Turning Radius - Standard Axle - Outside of Tire | — |
Oscillation Axle Angle | ±9° |
Minimum Turning Radius - Standard Axle - End of One-Piece Boom | — |
Minimum Turning Radius - Wide Axle - End of VA Boom | — |
Maximum Steering Angle | 35° |
Minimum Turning Radius - Standard Axle - End of VA Boom | — |
Minimum Turning Radius - Wide Axle - Outside of Tire | — |
Bucket Capacities | 0.38 to 1.26 m3 (0.50 to 1.65 yd3) |
Maximum Reach - Ground Level | — |
Maximum Digging Depth | — |
Maximum Travel Speed | — |
Exterior Sound | Exterior Sound |
Standards | Standards |
The Cat® C6.6 engine with ACERT™ Technology introduces a series of evolutionary, incremental improvements that provide breakthrough engine performance. The building blocks of ACERT Technology are fuel delivery, air management and electronic control. ACERT Technology optimizes engine performance while meeting EU Stage IIIA engine emission regulations. The Cat C6.6 engine in the M318D delivers a maximum gross power of 130 kW at a rated speed of 1,800 rpm. This is 9% more horsepower as compared to the 3056E in the M318C.
The C6.6 is electronically controlled and uses the new Cat Common Rail Fuel System and fuel pump. This combination provides outstanding fuel consumption during both production and travel. When the system recognizes roading application the engine will operate at the most efficient system operating point to save fuel without compromising road performance.
The Cat C6.6 design improves operator comfort by reducing sound and vibration.
An electronically controlled, hydraulic motor drives a variable speed on-demand fan for engine coolant and hydraulic oil. The optimum fan speed is determined based on coolant and hydraulic oil temperature resulting in reduced fuel consumption and lower sound levels. The electronic engine control continuously compensates for the varying fan load, providing consistent net power, regardless of operating conditions.
The two stage, one-touch Automatic Engine Speed Control reduces engine speed if no operation is performed, maximizing fuel efficiency and reducing sound levels.
A dedicated variable displacement piston pump and fixed displacement piston motor power the swing mechanism. This closed hydraulic circuit maximizes swing performance without reducing power to the other hydraulic functions, resulting in smoother combined movements.
This mode maximizes lifting performance by boosting the lifting capability of the excavator by 7%.
This function allows the operator to adjust the aggressiveness of the machine according to the application. For precision work, one of four different levels of aggressiveness can be preselected.
The stick regeneration circuit increases efficiency and helps increase controllability for higher productivity and lower operating costs.
The machine can be optionally equipped with a dedicated hydraulic circuit to operate hydraulic quick couplers.
Caterpillar integrates its cylinder snubber technology into all Wheel Excavator boom and stick cylinders. These snubbers help cushion shocks, reduce sound and increase cylinder life.
Scraping rock and finishing work is easy and fast. SmartBoom™ simplifies the task and allows the operator to concentrate on stick and bucket, while boom freely goes up and down without using pump flow.
The front parts automatically follow the hammer while penetrating the rock. Blank shots or excessive force on the hammer are avoided resulting in longer life for the hammer and the machine. Similar advantages with vibratory plate compactors.
Loading trucks from a bench is more productive and fuel efficient as the return cycle is reduced while the boom down function does not require pump flow.
The D Series Wheel Excavators are designed for outstanding performance with high fuel efficiency. This means more work done in a day, less fuel consumed and minimal impact on our environment.
The new Cat® C6.6 engine meets the new EU Stage IIIA emissions regulations while offering increased performance, reliability and reduced fuel consumption and sound levels.
Operator and spectator noise levels are extremely low as a result of the new variable speed fan and remote cooling system.
The optional biodegradable hydraulic oil (Cat BIO HYDO Advanced HEES™) is formulated to provide excellent high-pressure and high temperature characteristics, and is fully compatible with all hydraulic components. Cat BIO HYDO Advanced HEES™ is fully decomposed by soil or water microorganisms, providing a more environmentally sound alternative to mineral-based oils.
Lubricant fillers and drains are designed to minimize spills. Cat O-Ring Face Seals, Cat XT™ Hose and hydraulic cylinders are all designed to help prevent fluid leaks that can reduce the machine performance and cause harm to the environment.
Working closely with your Cat dealer can help extend service intervals for engine oil, hydraulic oil, axle oil and coolant. Meaning fewer required fluids and fewer disposal, all adding up to lower operating costs.
Improved visibility and ergonomics are some of the many new features of the D Series Wheel Excavators. The operator station provides maximum space and is designed for simplicity and functionality. Frequently used switches are centralized and are situated on the right-hand switch console. The left-hand seat console controls dozer blade and/or outriggers, and is tiltable for easy access to the cab. The fully automatic climate control adjusts temperature and air flow for exceptional operator comfort. Other comfort features include a cigar lighter, ashtray, cup/can holder, magazine rack and integrated mobile phone holder.
The exterior design uses thick steel tubing along the bottom perimeter of the cab, improving the resistance to fatigue and vibration. This design allows the falling object guards to be bolted directly to the cab. The cab shell is attached to the frame with rubber mounts that limit vibration and sound transmitted from the frame, substantially reducing interior noise levels.
Another new feature is electrically heated mirrors, increasing safety and visibility in cold conditions.
The parallel wiper system maximizes visibility in poor weather conditions. The wiper virtually covers the entire front windshield, cleaning the operator's immediate line of sight.
The new optional deluxe seat, equipped with an active seat climate system, improves operator comfort. Cooled air flows through the seat cushions to reduce body perspiration. On cold days, a two-step seat heater keeps the operator warm and comfortable. The fully adjustable seat with adjustable lumbar support automatically adjusts to the driver's weight providing a more relaxed and comfortable environment.
A large storage compartment is located behind the operator's seat. The compartment provides sufficient room to store items such as a lunch box. A cover secures the contents during machine operation.
Two-way pedals for travel and auxiliary circuits provide increased floor space, reducing the need to change positions. The foot pedal for auxiliary high-pressure circuit can be locked in the off position and used as a footrest for greater operator comfort.
The rearview camera displays on the operator monitor. Together with the best in class visibility to the front, up, left and right, the rearview camera ensures the safe operation of the machine and fulfills the requirements of ISO 5006/EN474.
The maximum travel speed for the M318D has been increased from 34 to 37 km/h, reducing travel time between sites and increasing productivity.
The D Series Wheel Excavator undercarriage provides rigidity and long life. Effective hydraulic line routing, transmission protection and heavy-duty axles make the undercarriage perfect for wheel excavator applications. The front axle offers wide oscillating and steering angles. The transmission is mounted directly on the rear axle for protection and optimum ground clearance.
The disc brake system acts directly on the hub instead of the drive shaft to avoid planetary gear backlash. This solution minimizes the rocking effect associated with working free on wheels. The axle design lowers maintenance and lifetime costs. Oil change intervals are at 2,000 working hours, further reducing owning and operating costs.
The optional fenders provide excellent coverage of the front and rear tires, protecting the machine from mud and dirt. Water cannot splash up on the windscreen or cooler. The fenders further protect the machine from stones and debris being thrown up by the tires, providing additional safety for the machine, other vehicles and personnel working close to the excavator.
Booms and sticks are welded, box section structures with thick, multiplate fabrications in high stress areas, for rugged performance and long service life.
The choice of two booms and four sticks provides the right balance of reach and digging forces for all applications.
The VA boom offers improved right side visibility and machine roading balance. When working in tight quarters or lifting heavy loads, the VA boom offers the best flexibility.
The one-piece boom fits best for all standard applications such as truck loading and digging. A unique straight section in the curve of the side plate reduces stress flow and helps increase boom life.
Cat work tools are designed to function as an integral part of your excavator and to provide the best possible performance in your particular application. All work tools are performance-matched to Cat machines.
Quick Couplers enable the operator to simply release one work tool and connect to another, making your hydraulic excavator highly versatile. Productivity also increases, as a carrier no longer needs to be idle between jobs. Caterpillar offers hydraulic and spindle quick coupler versions.
Caterpillar offers a wide range of specialized buckets, each designed and tested to function as an integral part of your excavator. Buckets feature the new Cat K Series™ Ground Engaging Tools.
Cat® hammer series deliver very high blow rates, increasing the productivity of your tool carriers in demolition and construction applications. Wide oil flow acceptance ranges make the Cat hammers suitable for a wide range of carriers and provide a system solution from one safe source.
The Orange Peel Grapple is constructed of high-strength, wear-resistant steel, with a low and compact design that makes it ideal for dump clearance. There are several choices of tine and shell versions.
The Multi-Grapple with unlimited left and right rotation is the ideal tool for stripping, sorting, handling and loading. The powerful closing force of the grab shells combined with fast opening/closing time ensures rapid cycle time which translates to more tons per hour.
Thanks to its single basic housing design, the Multi-Processor series of hydraulic demolition equipment makes it possible to use a range of jaw sets that can handle any demolition job. The Multi-Processor is the most versatile demolition tool on the market.
Cat compactors are performance-matched to Cat machines, and integrate perfectly with the Cat hammer line - brackets and hydraulic kits are fully interchangeable between hammers and compactors.
Cat shears provide superior and effective scrap processing, and are highly productive in demolition environments. Shears are compatible with a matching Cat excavator, and bolt-on brackets are available for either stick or boom-mounted options.
Caterpillar designed its D Series Wheel Excavators with the operator and service technician in mind. Gull-wing doors, with pneumatically-assisted lift cylinders, effortlessly lift up to allow critical maintenance to be performed quickly and efficiently while maintaining operator safety.
The D Series Wheel Excavator service and maintenance intervals have been extended to reduce machine service time, increase machine availability and reduce operating costs. Using S·O·SSM Scheduled Oil Sampling analysis, hydraulic oil change intervals can be extended up to 6,000 hours.
Cat engine oil is formulated to optimize engine life and performance. The specially formulated oil is more cost effective and increases engine oil change interval to 500 hours, providing industry leading performance and savings.
Cat air filters eliminate the use of service tools, reducing maintenance time. The air filter features a double-element construction with wall flow filtration in the main element and built-in mini-cyclone precleaners for superior cleaning efficiency. The air filters are constantly monitored for optimum performance. If airflow becomes restricted, a warning is displayed by the way of the in-cab monitor.
The hydraulic return filter, a capsule filter, prevents contaminants from entering the system when the hydraulic oil is changed.
Cat high efficiency fuel filters with a Stay-Clean Valve™ features a special media that removes more than 98% of particles, increasing fuel injector life. Both the primary and secondary fuel filters are located in the engine compartment and can be easily changed from ground level.
The D Series is equipped with a primary fuel filter with water separator located in the engine compartment. For ease of service, the water separator can be easily accessed from ground level.
The durable, corrosion-free tank has a remote drain located at the bottom of the upper frame to remove water and sediment. The tank drain with hose connection allows simple, spill-free fluid draining.
The front compartment hood can be opened vertically, providing outstanding ground level access to the batteries, air-to-air aftercooler, air conditioner condenser and the air cleaner filter.
The air conditioning condenser swings out horizontally to allow complete cleaning on both sides as well as excellent access to the air-to-air aftercooler.
Caterpillar has specially developed S·O·SSM Oil Sampling Analysis to help ensure better performance, longer life and increased customer satisfaction. This thorough and reliable early warning system detects traces of metals, dirt and other contaminants in your engine, axle and hydraulic oil. It can predict potential trouble avoiding costly failures. Your Cat dealer can give you results and specific recommendations shortly after receiving your sample.
The engine can be accessed from both ground level and the upper structure. The longitudinal layout ensures that all daily inspection items can be accessed from ground level.
They cover the top of the steps and upper structure to help prevent slipping during maintenance. The Anti-Skid plates reduce the accumulation of mud on the upper structure, improving the cleanliness and safety.
Flat fins on all coolers reduce clogging, making it easier to remove debris. The main cooling fan and air conditioner condenser are both hinged for easier cleaning.
For those hard to reach locations, greasing blocks have been provided to reduce maintenance time.
Large handrails and steps assist the operator in climbing on and off the machine.
Standard Light Emitting Diode (LED) rear lights replace the standard lights, for increased visibility on the job site, higher durability and longer life.
The integrated Tool Control system allows the operator to select up to 10 preset combinations. This eliminates the need to reset the hydraulic parameters each time a tool is changed. Individual flow and pressure can be programmed easily as well as one-way/two-way hydraulic functions. Each of the ten-programmed tools can even be given a specific name. The unique Cat proportional sliding switches and optional auxiliary pedal provide modulation to the tool to make precision work easy.
The unique joystick steering option enables an operator to reposition the machine while traveling in first gear by the use of the slider switch on the right joystick. This enables the operator to keep both hands on the joysticks while simultaneously moving the implements and traveling. The operator can do more precise work faster with increased safety around the machine.
Product Link can assist with Fleet Management to keep track of hours, location, security and product health. The machine is prewired to accept Product Link systems to be installed in the field. Product Link is also available as a factory installed attachment.
An optional Machine Security System is available from the factory. This system controls who can operate the machine when, and utilizes specific keys to prevent unauthorized machine use.
New for the D Series, the ride control system improves operator comfort and allows the machine to travel faster over rough terrain with improved ride quality for the operator. The ride control system features accumulators acting as shock absorbers to dampen the front part motion. Ride control can be activated through a button located on the soft switch panel in the cab.
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