The 3408C engine is a field proven engine that delivers excellent reliability and durability in all applications.
High Torque Rise
The 18 liter engine delivers a high torque rise, providing excellent lugging capacity to move heavier loads more efficiently.
The mechanically controlled engine provides easy maintenance and repair in remote areas where diagnostic tools may not be available.
High Tensile Strength Block
The 3408C block is cast from high-tensile-strength gray iron. The one piece casting is stabilized to maintain internal dimensions under all operating conditions.
Four Valve Cylinder Heads
The engine uses two intake and two exhaust valves with hardened valve faces that are designed to be reground. Rotators turn the valves about three degrees each lift to distribute wear and maintain heat transfer. Valve stems are made from hardened, chrome plated steel to provide excellent wear and heat resistance.
An internal top-deck cooling shelf increases coolant flow to the top of the cylinders for long cylinder liner and piston life. The deep-skirted lower structure and heavy internal ribbing add strength and rigidity to the block.
Carbon Steel Forged Crankshaft
The crankshaft is a carbon steel forging, fully heat-treated, super-finished and dynamically balanced.
Two Pass Cooling System
Circulates coolant from the sectioned bottom tank up through one side of the cooling element and down through the other side returning it to the bottom tank.
The cooling elements are individual core modules that are connected to a sectioned bottom tank. There is no top tank to remove.
- With standard 9 steel fins per inch, a lower fin density reduces plugging.
- Brass tube construction within each core for improved reliability.
- Optional core configurations are available for high ambient and/or high wear applications.
Servicing can be performed without tilting the radiator guard. Each core module can be replaced individually (without removing the entire radiator), saving considerable cost and repair time.
Protection From Leaks
To reduce the potential for coolant leaks, brass tubes are welded to a large, thick header, improving strength of the tube-to-header joint.
In conditions with airborne abrasive materials an optional coated blower fan and sand blast grid should be used to minimize radiator damage.
The proven Cat planetary power shift transmission operates with three speeds forward and three speeds reverse. With this design, many gears share the load as it gets transferred to the axles. In contrast, with a countershaft transmission, just one gear carries the load.
Bevel Gear Design
Helical and spiral bevel transfer gears reduce operator and spectator sound levels by design as well as location, being placed in the rear case of the machine.
Oil Cooled Clutch Packs
The transmission features large oil-cooled clutch packs that efficiently absorb the energy of directional shifts for smooth machine performance and excellent operator comfort. Proprietary F37 clutch material extends clutch life, especially in applications where extensive maneuvering is used to maintain peak machine productivity. This material also minimizes transmission oil contamination compared to materials used in other manufacturers’ transmissions.
Separate Transmission Oil Reservoir
The transmission oil sump is separate from both final drive reservoirs, controlling cross contamination in the event of a failure of either system. This allows the use of modular components to maximize uptime over the life of the tractor.
Hand levers with combined steering, control clutch disengagement and brake application for each track.
In terms of serviceability, the planetary transmission provides significant advantages. The modular design simplifies removal and installation. Since the bevel gears and pinions are manufactured to such a high degree of accuracy, they do not need to be lapped and mated into sets, reducing repair costs.
Torque Divider Performance
An improved single-stage torque converter sends 75% of engine torque through a converter and 25% through a direct drive shaft for greater driveline efficiency and higher torque multiplication. The torque divider provides improved efficiency and a broader range of performance in second gear dozing and scraper push loading.
Operating Efficiency and Driveline Reliability
The torque divider shields the driveline from sudden torque shocks and vibration.
Improves torque divider efficiency. During machine operation under low drawbar loads, the stator is permitted to rotate to achieve peak efficiency. The result is a reduction in heat and an increase in fuel efficiency.
Key Benefits of Torque Dividers
- High reliability.
- Proven component design.
- Low dynamic torque.
- Optimum combination of operator efficiency and driveline reliability.
- Components are designed to absorb full engine power.
- High torque multiplication to get heavy loads moving.
A minor, but important, by-product of the torque divider is its tendency to increase engine lug all the way to converter stall. This gives the operator additional feedback concerning tractor speed and drawbar pull.
Provides the operator instant feedback on the condition of operating systems and records performance data to help diagnose problems. Gauges monitor fuel level and the temperature of the engine coolant, hydraulic oil, and power train oil. Includes alert indicators that monitor engine oil pressure, coolant flow, electrical system and transmission oil filter.
Interior Storage and Amenities
Includes intermittent windshield wipers, 12-volt power outlet, first aid kit storage, inside door releases, lunch box tie-downs, cup holder, console pads, standard 24 to 12 volt converter, speakers and antenna.
An optional isolation-mounted cab reduces noise and vibration. The Cat Comfort Series Seat is fully adjustable and designed for comfort and support. The seat and back cushions are thicker to reduce pressure on the lower back and thighs while allowing unrestricted arm and leg movement.
Wide Panoramic View
A tapered hood and “notched” fuel tank give the operator a clear line of sight to the front and rear work areas. The low rear window lets the operator see the ripper tip. The large single-pane door windows allow clear sight to each side without leaning.
Isolation-Mounted Operators Platform
The D9R features an isolation-mounted operators platform with standard ROPS/FOPS.
The D9R mainframe is built to absorb high impact shock loads and twisting forces encountered during severe dozing and ripping applications.
Heavy Steel Castings
The main case, equalizer bar saddle, and front cross member are heavy duty steel castings incorporated into highly loaded areas of the mainframe to improve stress distribution for improved durability.
Full box section, designed to keep components rigidly aligned.
Top and Bottom Rails
Top and bottom rails are made from continuous rolled sections providing superior mainframe durability.
Elevates the final drives well above the ground level work area to protect them from impact loads, abrasion and contaminants.
Pivot Shaft and Pinned Equalizer Bar
Maintain track roller frame alignment and allow the roller frame to oscillate for smoother ride.
Equalizer Bar End Pins
Proper grease lubrication on working surfaces can significantly extend component life and help lower maintenance cost. Remote lubrication is performed from a service point conveniently located on the left hand side of the engine compartment and allows an operator or service technician to lubricate both the left hand and right hand equalizer bar pin bearings and pins from one service point.
Tag-Link blade mounting brings the blade closer to the machine for excellent maneuverability, machine balance and blade penetration. This design also eliminates the need for diagonal bracing by transferring side loads to the mainframe, instead of the dozer push arms.
The elevated sprocket and fully suspended undercarriage work together, increasing traction while creating a smoother ride for your operators. The elevated sprocket design transfers implement shock loads to the mainframe, so final drives, axles and steering components are isolated from harsh impacts. These benefits translate into higher production and longer component life.
- Bogie Suspension allows the track to conform to ground condition, providing up to 15% more ground contact, especially in hard, uneven terrain. Higher traction means less slippage, better balance, and a smoother ride.
- Roller frames are tubular to resist bending and twisting, with added reinforcement where operating loads are highest.
- The undercarriage idler guard provides additional wear protection from abrasive material to the moving undercarriage. Includes rubber idler protectors.
Positive Pin Retention (PPR) Sealed and Lubricated Track
Designed for high-impact and high load applications. The PPR exclusive Caterpillar design locks the link to the pin reducing the opportunity for premature loss of lubrication. Sealed design permanently coats the track pin with lubricant, minimizing metal-to-metal contact and virtually eliminating internal pin and bushing wear.
All blades feature a strong box-section design that resists twisting and cracking. Blades are made of high tensile strength steel that stands up to the most demanding applications.
- High-Capacity Universal Blade – Efficient at moving big loads over long distances.
- Semi-Universal Blade – Built for tough applications in tightly packed material where penetration is important.
- Optional Dual Tilt – Allows the operator to optimize the blade pitch angle.
- Cutting Edges and End Bits – Cutting edges are DH-2™ steel. End bits are DH-3™ to provide maximum service life in tough materials. For extremely severe applications, moldboard wear plates, extended wear life end bits and cutting edges are available.
- Cat Work Tools offer a range of special application blades, including coal stockpile blade, cushion dozer blade, reclamation blades and wood chip blade.
- Single-Shank Ripper – Built for tough ripping conditions and greater ripping depth. Operator can adjust the shank depth from the seat using an optional single-shank pin puller. Large one piece shank, available in deep rip configuration.
- Multi-Shank Ripper – Generally for lighter duty ripping applications in less severe materials. Provides high levels of productivity. Tailors the tractor to the material by using one, two or three shanks.
CapSure™ Hammerless Ripper Tip and Shank Protector Retention System
The tip and shank protector are easily installed with a 180 degree turn of a ¾ inch ratchet. This simple installation means no hammering and therefore improved safety. It also means quicker change outs and less downtime.
Provide proper tractor balance to maximize dozing production. Recommended if dozer is not equipped with any other rear attachment.
Built-In Servicing Ease
Major components are made as modules and can be removed without disturbing or removing others.
Spin-on fuel and engine oil filters save changing time. Further time is saved with fast fuel and quick oil change attachments.
To improve electrical system reliability and servicing, sealed electrical connectors are used in most locations. The harness connectors lock out dust and moisture better than “bullet” or “metal twist” connectors.
Provide an environmentally safer method to drain fluids. Included on the radiator, hydraulic tank and major power train components.
Easier Maintenance and Repair
Experience easier maintenance and repair through monitoring key functions and logging critical indicators. Electronic diagnostic access is possible with a single tool, the Electronic Technician (Cat ET).
Quick Disconnect Fittings
Allow for fast diagnosis of the power train and implement oil systems.
Increased fuel tank capacity for a full, non-stop shift between refills. Fast fuel attachment with positive fuel shut-off to prevent fuel spillage.
Dealers committed to fast, quality customer support. Your Cat dealer’s investment in service begins with the fastest and most complete parts availability in the industry.
Make detailed comparisons of the machines you are considering before you buy. How long do components last? What is the cost of preventive maintenance? What is the true cost of lost production? Your Cat dealer can give you answers to these questions.
Plan for effective maintenance before buying equipment. Choose from your dealer’s wide range of maintenance services at the time you purchase your machine. Programs such as Custom Track Service (CTS), S·O·SSM analysis, Technical Analysis and guaranteed maintenance contracts give peak life and performance to your machine.
You will find nearly all parts at your dealer parts counter. Cat dealers use a world-wide computer network to find in-stock parts to minimize machine down time. Ask about your Cat dealer’s exchange program for major components. This can shorten repair time and lower costs.
Save money with remanufactured parts. You receive the same warranty and reliability as new products at a cost savings of 40 to 70 percent.
Cellular Product Link (optional) is deeply integrated into your machine, helping you take the guesswork out of equipment management. Cellular Product Link transmits basic health, machine location, and utilization data for remote machine monitoring via the on-line VisionLink user interface which can help you effectively manage your fleet and lower operating costs.