| Cylinder Liners | Full-length water-cooled cylinder liners provide maximum heat transfer. |
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| Electronic Controls | Electronic controls allow smooth, on-the-go shifting for greater productivity. |
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| Sight Gauges | Makes fluid levels checks quick and easy. |
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| Torque Converter | High capacity torque converter delivers more power to the wheels for superior power train efficiency. |
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| Differential | No spin rear differential reduces tire wear and maximizes traction in uneven terrain. |
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| Suspension Seat | Suspension seat provides optimal driving position and enhances operator comfort, all shift long. |
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| Pistons | Oil cooled pistons increase heat dissipation and promote longer piston life. |
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| Scheduled Oil Sampling | S•O•SSM sampling valves speed sampling and analysis reliability. |
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| Turbocharged and Aftercooled | Air-to-air aftercooling provides improved fuel economy by packing cooler, denser air into cylinders for more complete combustion of fuel and lower emissions. The turbocharger enhances performance and efficiency. |
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| Mechanically Actuated, Electronic Unit Injection ( | Proven high-pressure, direct injection fuel system electronically monitors operator demands and sensor inputs to optimize engine performance. |
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| Power Train - Engine | The Cat® C15 engine with ACERT™ Technology delivers the power and reliability necessary to perform in the most demanding underground mining applications. | 
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| Cat C15 Engine with ACERT™ Technology | The Cat C15 engine with ACERT™ Technology is U.S. EPA Tier 3 and EU Stage III compliant. It features efficient fuel management for quick response, high productivity and exceptional service life. A new, sculptured cylinder block provides greater strength and lighter weight. |
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| High Torque Rise | Provides unequalled lugging force while digging, tramming and traversing steep grades. Torque rise effectively matches transmission shift points for maximum efficiency and fast cycle times. |
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| Radiator | Modular radiator with swing-out grill provides easy access for cleaning or repair. Built in sight gauge allows for quick, safe coolant level checks. |
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| ADEM™ IV System | Controls the fuel injector solenoids to monitor fuel injection. This system provides automatic altitude compensation, air filter restriction indication and it will not allow the engine to fire until it has oil pressure, acting as cold start protection and a form of pre-lube. |
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| Crankshaft | The crankshaft is forged and induction hardened for long-term durability. |
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| Robust Design | Designed for rugged underground mining conditions, the proven planetary power shift transmission is built for long life between overhauls. |
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| Power Train - Transmission | Designed for durability, the Cat power shift transmission delivers smooth, responsive performance and reliability in tough conditions. | 
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| Power Shift Transmission | The Cat four-speed planetary power shift transmission is matched with the C15 engine with ACERT™ Technology to deliver constant power over a wide range of operating speeds.
- Hydraulic modulation cushions the shift and reduces stress on components.
- High contact pump drive and output transfer gears are used to reduce sound levels.
- Pump drive and output transfer use high contact gear ratios to reduce sound levels.
- Perimeter mounted, large diameter clutch packs con
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| Electronic Autoshift Transmission | The electronic autoshift transmission increases operator efficiencies and optimizes machine performance. The operator can choose between manual or auto shift modes. |
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| Transmission Neutralizer | Using the left brake pedal, the operator can engage the service brakes and neutralize the transmission, maintaining high engine rpm for full hydraulic flow, enhancing digging and loading functions. |
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| Final Drives | Cat final drives work as a system with the planetary power shift transmission to deliver maximum power to the ground. Built to withstand the forces of high torque and impact loads, final drives provide high torque multiplication to further reduce drive train stress. |
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| Axles | Heavy duty axles are built rugged for long-life in the most demanding environments. |
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| Oscillating Rear Axle | Oscillating rear axle ensures four-wheel ground contact for maximum traction and stability at all times. |
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| Duo-Cone™ Seals | Duo-Cone™ seals between the axle spindle and housings keep lubrication in and contaminants out. |
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| Brakes | Fully enclosed oil immersed disc brakes incorporate independent service and parking brake pistons. Hydraulic actuated independent circuits provide improved performance and reliability. |
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| Service Brakes | Self-adjusting, fluid applied, spring released service brakes feature modulated engagement. Independent front and rear circuits use separate brake accumulators for greater performance. |
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| Parking Brake | Self-adjusting, Spring Applied Fluid Released (SAFR™) parking brake is applied by a spring force when fluid pressure is released. An independent piston acts directly on the inboard axle mounted brake disc on each wheel. |
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| Cat Electronic Technician | Cat ET service tool provides service technicians with easy access to stored diagnostic data through the Cat Data Link to simplify problem diagnosis and increase availability. |
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| Diagnostic Capability | Critical data from the transmission controls provide service technicians with enhanced diagnostic capability to reduce downtime and operating costs. |
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| Hydraulics | Cat hydraulics deliver the power and control to keep material moving. | 
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| Hydraulic System | Powerful Cat hydraulics deliver exceptional digging and lifting forces for fast cycle times. |
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| Lift and Tilt System | High hydraulic flow rates provide fast hydraulic cylinder response and powerful lift forces. Large-bore lift and tilt cylinder delivers exceptional strength, performance and durability. |
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| Pilot Controls | Low effort, pilot operated joystick implement control with simultaneous lift and tilt functions optimizes operating efficiency. |
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| Optional Ride Control | The optional ride control system uses a nitrogen filled oil accumulator in the hydraulic lift circuit to act as a shock absorber for the bucket and lift arms. The lift arm and bucket response to movement is dampened over rough ground, reducing fore and aft pitch, improving cycle times and load retention. A smoother, more comfortable ride gives operators the confidence to travel at speeds above 5 km/h (3 mph) during load and carry operations. |
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| Cat Hydraulic Hose | Field proven Cat high pressure XT™ hydraulic hoses are exceptionally strong and flexible for maximum system reliability and long life in the most demanding conditions. Reusable couplings with O-ring face seals provide superior, leak free performance and prolong hose assembly life. |
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| Structures | Designed for maximum strength and durability in the harshest operating environments. | 
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| Frame Design | The frame features robust structural components for outstanding durability in the toughest loading conditions. Caterpillar integrates advanced processes in the design and manufacture of Cat frames and structures. Computer modeling and Finite Element Analysis (FEA) are used extensively throughout design. |
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| Steel Frame | Strong steel frame structures are designed to resist twisting forces, torsional shock and stresses generated during the loading cycle while protecting drive line and hydraulic system components. |
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| Lift Arms | Solid steel lift arms absorb high stresses generated during loading without sacrificing strength or durability. The linkage design offers excellent reach and dump clearance for better productivity. Lift arm support pins prevent lowering the lift arms during service and maintenance. |
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| Loader Tower | The four plate loader tower provides a solid mount for lift arms, lift cylinders and Z-bar tilt lever. The loader frame is designed and built to absorb twisting, impact and high loading forces. |
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| Cast-Steel Cross Tube | The cast steel cross tube provides excellent resistance to torsion and impact loads, keeping pin bores aligned and extending component service life. |
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| Z-Bar Loader Linkage | Proven Z-Bar loader linkage geometry generates powerful breakout force and an increased rack back angle for better bucket loading and material retention. |
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| Sealed Pins | Sealed colleted pins are fitted to all bucket and lift arm hinge points for longer pin and bushing life. This reduces maintenance costs and extends service intervals. The sealed joints retain lubrication and prevent contaminant entry. |
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| Operator Station | Setting a new industry standard for comfort and efficiency. | 
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| Ergonomic Layout | The operator station is ergonomically designed for total machine control in a comfortable, productive and safe environment. All controls, levers switches and gauges are positioned to maximize productivity and minimize operator fatigue. |
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| Pilot Controls | Low-effort pilot operated joystick controls integrate steering, transmission and implement functions for smoother, faster cycles with less operator fatigue. |
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| Hitch | Spread hitch design widens the distance between upper and lower hitch plates to distribute forces and increase bearing life. Thicker hitch plates reduce deflection. The wide opening provides easy service access. Upper and lower hitch pins pivot on roller bearings to distribute horizontal and vertical loads over a greater surface area. Shim adjusted preload reduces maintenance time. An on-board steering frame lock pin is fitted to prevent articulation during maintenance and service. |
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| Electronic Autoshift | Allows the operator to choose automatic or manual shifting. In auto mode, the operator uses a dash mounted switch to select the highest gear they wish the machine to shift to. In this mode, the transmission shifts at factory preset shift points so that each shift occurs at optimum torque and ground speed for maximum machine performance. |
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| Dual-Pedal Braking | Dual brake pedals function as a brake and a transmission neutralizer so the operator can maintain high engine rpm for full hydraulic flow and fast cycle times. |
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| Protective Structure | Integral to the cab and frame, the Rollover Protective Structure (ROPS) is resiliently mounted to the frame to isolate the operator from vibration for a more comfortable ride. |
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| STIC™ Steering Control | STIC™ combines directional selection, gear selection and steering into a single lever for maximum responsiveness. Simple side-to-side motion turns machine right or left. Transmission shifting (forward/neutral/reverse) is controlled using a three position rocker switch. The thumb operated upshift and downshift button controls manual shifting. | 
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| Optional Enclosed Cab | Optional sound-suppressed ROPS cab provides a quiet, secure working environment. Large window openings offer excellent visibility in all directions. Enclosed design provides fresh, pressurized, temperature-controlled air circulation with air-conditioned comfort and a more comfortable working environment. |
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| Optional Ride Control | The system uses a nitrogen filled oil accumulator in the hydraulic lift circuit to act as a shock absorber for the bucket and lift arms. The lift arm bucket response to movement is dampened over rough ground, reducing fore and aft pitch, improving cycle times and load retention. A smoother, more comfortable ride gives operators the confidence to travel at higher speeds during load and carry applications. |
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| Monitoring System | Caterpillar Electronic Monitoring System (CEMS) continuously provides critical machine data to keep the machine performing at top production levels. A warning system alerts the operator of immediate or impending problems with engine oil pressure, parking brake engagement, brake oil pressure, electrical system, low fuel, hydraulic oil temperature, coolant level/temperature, transmission oil temperature and impending brake application. |
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| • Message Center | Three-category warning system alerts operator of abnormal machine health conditions. |
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| • Gauge Cluster | Maintains a constant display of vital machine functions, including: engine coolant temperature, brake oil temperature, air system pressure and fuel level. | 
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| • Speedometer/Tachometer Module | Monitors three systems: engine speed, ground speed and gear indicator. | 
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| Buckets | Cat buckets provide the flexibility to match the machine to the material and conditions. | 
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| Buckets | Aggressive Cat bucket designs deliver unmatched productivity in the most demanding applications. Underground mining buckets are designed for optimal loadability and structural reliability to increase productivity and help lower your cost-per-ton. |
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| Service Access | Easy access to daily service points simplifies servicing and reduces time spent on regular maintenance procedures. |
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| Ground-Level Access | Allows convenient servicing to all tanks, air filters, lubrication points and compartment drains. |
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| Air Filters | Radial seal air filters are easy to change, reducing time required for air filter maintenance. |
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| Bucket Selection | Cat underground loader buckets are available in standard and penetration configurations to meet a range of loading, hauling and dumping conditions. | 
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| Bucket Capacities | Buckets are available in a range of sizes and capacities to suit most material types and densities. |
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| Wear Packages | Weld-on wear plates in high wear areas are standard. Additional wear packages are available, including sacrificial wear strips and Cat heel shrouds, protect the edges from damage for longer bucket life and reduce the need for costly bucket rebuilds. |
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| Cutting Edges | Cat half arrow and cast half arrow cutting edges extend bucket life in high wear applications. |
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| Serviceability | Less time spent on maintenance means more time being productive. | 
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| Diagnostics | Cat Electronic Technician (Cat ET) Service Tool enables quick electronic diagnosis of machine performance and key diagnostic data for effective maintenance and repairs. |
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| Sealed Electrical Connectors | Electrical connectors are sealed to lock out dust and moisture. Harnesses are externally sealed with flame resistant sleeves/covers for protection. Wires are color and number coded for easy diagnosis and repair. |
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| Customer Support | Caterpillar dealers have what it takes to keep mining underground equipment productive. | 
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| Commitment Makes the Difference | Cat dealers offer a wide range of solutions, services and products that help you lower costs, enhance productivity and manage your operation more efficiently. Support goes far beyond parts and service. From the time you select a piece of Cat equipment until the day you rebuild, trade or sell it, the support you get from your Cat dealer makes the difference that counts. |
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| Dealer Capability | Cat dealers will provide the level of support you need, on a global scale. Dealer expert technicians have the knowledge, experience, training and tooling necessary to handle your repair and maintenance needs, when and where you need them. |
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| Product Support | Cat dealers believe superior products deserve superior support. When Cat products reach the field, they are supported by a worldwide network of parts distribution facilities, dealer service centers, and technical training facilities to keep your equipment up and running. Cat customers rely on prompt, dependable parts availability and expertise through our global dealer network, ready to meet your needs 24/7. |
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| Service Support | Every piece of Cat equipment is designed and built to provide maximum productivity and operating economy throughout its working life. Cat dealers offer a wide range of service plans that will maximize uptime and return on your investment, including:
- Preventive Maintenance Programs
- Diagnostic Programs, such as Scheduled Oil Sampling and Technical Analysis
- Rebuild and Reman Options
- Customer Support Agreements
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| Technology Products | Cat dealers offer a range of advanced technology products designed to improve fleet efficiency, increase productivity, and lower costs. |
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| www.cat.com | For more complete information on Cat products, dealer services, and industry solutions, visit us on the web at www.cat.com. |
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| Operation | With today’s complex products, equipment operators must have a thorough understanding of machine systems and operating techniques to maximize efficiency and profitability. Your Cat dealer can arrange training programs to help operator's improve productivity, decrease downtime, reduce operating costs, enhance safety, and improve return on the investment you make in Cat products. |
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| Safety | Caterpillar mining machines and systems are designed with safety as their first priority. | 
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| Product Safety | Caterpillar has been and continues to be proactive in developing mining machines that meet or exceed safety standards. Safety is an integral part of all machine and systems designs. |
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| Engine Shut Off Switch | A secondary engine shutoff switch is located at ground level. |
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| Integral ROPS Cab | Integral to the cab and frame, the ROPS is resiliently mounted to the frame to isolate the operator from vibration for a more comfortable ride. |
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| Brake Systems | Four corner oil-cooled braking system provides excellent control. The service brakes system is actuated by modulated hydraulic pressure, while the parking break function is spring applied and hydraulic released. This system assures braking in the event of loss of hydraulic failure. |
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| Standard Safety Features | - Anti-skid upper deck surfaces
- Lower cab light
- Ground level compartment sight glasses
- Increased visibility
- 3-point access to cab and machine
- Push out safety glass
- Suspension seat
- Inertia reel retractable seat belt
- Bucket control group safety pins
- Hot and cold side of engine
- Articulation lock
- Hinged belly guards
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