 |  | Power Train
The rugged, easy-to-service 3176C engine features the electronically controlled, direct injection fuel system for improved fuel efficiency and reduced emissions. The 3176C meets EPA Tier 2, EU Stage II, and Japan MOC Step 2 exhaust emission regulations. |
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Cat 3176C Engine
The Cat 3176C engine meets EPA Tier 2, EU Stage II, and Japan MOC Step 2 exhaust emission regulations. Major features include:
- Power of 179 kW (240 hp) for superior performance.
- Large displacement electronic engine with lower exhaust emissions and good cold start capability.
- Power train to engine link with controlled throttle shifting.
- Higher efficiency turbocharger for improved airflow.
- Fuel/Air Ratio Control to minimize acceleration smoke.
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Air Inlet Heater
Fully automatic electronic air inlet heater facilitates cold starting conditions.
- No service required.
- Replaces the ether starting aid.
- 30-second pre-heat cycle.
- Eliminates the need for conventional block heat systems down to -32°C (-26°F).
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 | | Cylinder Block
Engine durability begins with a strong foundation – the cylinder block. The 3176C cylinder block is a single-piece, deep-skirted serpentine design made from 32,000 psi (220,480 kPa) tensile strength cast iron to provide strength and maximum lower end durability. Quality is maintained through intensive process control programs. |
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 | | Cylinder Head
The cylinder head of the 3176C is designed for efficient breathing, which helps ensure excellent fuel economy. The cylinder head is a one-piece, stress-relieved, gray-iron casting with four valves per cylinder. Intake and exhaust valves are equal in size and strength to those found in larger displacement engines, to provide maximum reliability and performance. Stainless steel injector sleeves, press-fit into the head, help ensure easy serviceability. This is a critical point since fuel, coolant, and oil must be kept in separate reservoirs. |
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Valves
Stellite-faced valves, assures reliability and performance in the toughest applications. The engine uses two intake valves and two exhaust valves per cylinder. Hardened valve faces resist wear at extreme temperatures. Rotators turn the valves about three degrees each lift to distribute wear and maintain heat transfer. Hardened steel, chrome-plated valve stems provide excellent wear and heat resistance. Stellite-faced valves are designed to permit reuse at engine rebuild. |
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 | | Electronic Unit Injector (EUI)
The Electronic Unit Injection system is a unique and proven high-pressure, direct injection fuel system. This system electronically monitors operator and sensor inputs to optimize engine performance and is virtually adjustment-free. The EUI fuel system is comprised of two subsystems, the mechanical subsystem, and the electronic subsystem. The Electronic Unit Injectors included in the mechanical subsystem produce fuel injection pressures up to 30,000 psi (206700 kPa), atomizing the fuel into fine droplets. Minute fuel particles burn more completely during the combustion cycle, contributing to improved fuel economy and reduced emissions. The electronic control module (ECM), included in the electronic subsystem, is a computer that regulates time and rate of injection and controls all major engine functions. Some of the ECM features are electronic speed governing, cold start-up mode strategy, automatic altitude compensation, variable injection timing, and oil pressure and coolant warnings. These features result in precise engine speed control, unmatched cold starting, low smoke and emissions under all operating conditions, and built-in engine protection. |
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Reduced Exhaust Smoke
Exhaust smoke is significantly reduced through precise, electronic control of fuel metering and injection timing. |
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Improved Reliability
Improved reliability through simplification of mechanical linkages and by electronically protecting the engine during:
- Cold starts.
- Prolonged idling periods.
- High altitude operation.
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 | | Pistons
The two-piece, articulated piston design consists of a forged-steel crown for maximum strength and a cast aluminum skirt to reduce weight. A large piston pin holds the crown, skirt, and connecting rod together. The aluminum skirt runs cooler than conventional pistons, allowing a closer fit to the cylinder liner and providing longer life. The steel crown handles the higher internal pressures of today’s engines. |
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Design
The fuel system design eliminates external high-pressure fuel lines, providing efficient, precise fuel delivery, and timing. |
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Serviceability
Unit injectors can be serviced individually, without the need to service the entire fuel system. |
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 | | Crankshaft
Another bottom-end building block, which indicates the durability of an engine, is the crankshaft. The 3176C crankshaft is a single-piece, steel forging with induction-hardened journals and fillets. The wide center and end main journals and bearings are designed to maintain maximum oil film thickness for excellent lubrication and for cooling the bearings. The result is long life-to-overhaul. |
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Turbocharging and Aftercooling
The 3176C has a well-matched turbocharger and Separate Circuit Aftercooler, which result in high horsepower while keeping rpm and exhaust temperatures low. When you couple a turbocharger with cooler inlet air from a superior aftercooling system, it is no surprise that the 3176C engine will have:
- Cleaner emissions.
- Better response.
- Improved fuel economy.
- Longer life.
- Less heat rejection.
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Turbocharger
The 3176C turbocharger provides better bottom-end response, improved fuel economy, and less heat rejection. |
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 | | Large Air Filters
Larger air filters provide additional capacity and a longer service life in severe conditions for lower owning and operating cost. |
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Longer Component Life
The cylinder head utilizes additional coolant passages to provide maximum engine cooling. Cylinder liner inner surfaces are fully honed and induction hardened to maximize wear resistance. Oil-cooled pistons and full-length, water-cooled cylinder liners provide maximum heat transfer for longer component life. |
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 | | Advanced Modular Cooling System (AMOCS)
AMOCS utilizes an exclusive two pass cooling system and increased cooling surface area to provide significantly more cooling efficiency than conventional systems. |
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| | Two-Pass Cooling System
Using a two-pass system, the AMOCS radiator provides a more efficient heat exchange. Coolant is routed from a sectioned bottom tank up the front side, over the top of the core and down the engine side of the core to the bottom tank. This flow pattern allows the coolant to pass through the radiator twice for better cooling. |
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| | Modular Design
The cooling elements are individual core modules connected to a sectioned bottom tank. There is no top tank to remove.
Design includes:
- Standard 9 steel fins per 12.54 cm (1 in), or an optional 6 steel fins per 2.54 cm (1 in).
- Brass tube construction within each core for improved reliability.
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| | Separate Circuit Aftercooling
The 572R Series 2 features a Separate Circuit Aftercooler. Two of the AMOCS cores are dedicated to the aftercooler coolant circuit to achieve cooler inlet air temperatures, which increases performance and improves engine emissions. A separate water pump is used to circulate the aftercooler coolant. |
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| | Serviceability
Modular core design permits removal of a single core without removing the entire radiator, reducing repair costs and downtime. AMOCS eliminates the top tank, side channels and one sealing surface, making it more reliable and easier to service. Also features a site gauge for quick service checks. |
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| | 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. |
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Sand Blast Grid
In applications where airborne debris is prevalent, radiator core protection is a concern. To extend radiator life in harsh applications, a sand blast grid is available as an option to deflect the damaging debris the engine fan propels at the radiator. |
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 | | Drive Train
Rugged, durable, and reliable components deliver smooth, responsive power and lasting reliability. The Auto-shift and Auto-kickdown features enhance operator comfort. |
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| | Torque Divider
The 572R Series 2 single stage torque divider efficiently responds to changing load conditions by providing torque multiplication, therefore increasing drawbar power. Provides protection to the drive train components by preventing shock loads. The torque divider is efficiently matched to the power train components providing superior performance. |
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Torque Divider Benefits
The 572R Series 2 torque divider provides:
- High reliability.
- Proven component design.
- Low dynamic torque.
- Optimum combination of operating efficiency and driveline reliability.
- Components designed to absorb full engine power.
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Operating Efficiency and Driveline Reliability
The 572R Series 2 torque divider attains the best combination of operating efficiency and driveline reliability. Reduces shock loads to the transmission and final drives by acting as a hydrodynamic component between the engine and transmission. |
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 | | Transmission
The proven planetary power shift transmission features three speeds forward and three speeds reverse and utilizes large diameter, high capacity, oil cooled clutches. To maximize the life of the transmission, the planetary design distributes loads and stresses over multiple gears.
- Controlled throttle shifting regulates engine speed during high-energy directional shifts for smoother operation and longer component life.
- Load compensating shifting automatically adjusts the clutch engagement timing according to load factor, resulting in improved tractor performance and operator comfort. It reduces the amount of energy dissipating through the clutches to help extend transmission life.
- Electronic clutch pressure control (ECPC) allows fast speed and directional changes by controlling the speed and engagement of the clutches.
- The transmission and bevel gear set are modular by design and easily slide into the machine’s rear case.
- Forced oil flow lubricates and cools clutch packs to provide maximum clutch life.
- Oil-to-water cooler for maximum cooling capacity.
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Load Compensating Shifting
The 572R Series II automatically adjusts the clutch engagement timing according to load factor, resulting in improved performance and operator comfort during speed changes. Load compensating shifting reduces the amount of energy dissipated through the clutches helping extend transmission component life. |
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Electronic Clutch Pressure Control
The 572R Series 2 has an additional transmission-shifting feature for added performance and operator comfort — the Electronic Clutch Pressure Control (ECPC). This unique feature provides smoother shifting by regulating and modulating the individual clutches based on current operating conditions. |
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 | | Steering Clutch and Brakes
Oil cooled, hydraulically actuated, large diameter plates and clutch discs provide higher torque capacity and increased service life. |
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Thick, Large Diameter Plates and Clutch Disks
Thick, large diameter plates and disks provide torque capacity and increased service life. |
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Brake Housing
Brake housing features cast rib design for durability. |
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Cooling Oil Valve
Cooling oil valves control oil flow for brake heat dissipation, extending brake life. |
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Tapered Roller Bearings
Tapered roller bearing design provides excellent service life. |
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Electronic Steering and Transmission Controls
The 572R Series II provides Finger Tip Control for steering. Soft touch buttons located on the steering controls shift the electronically controlled transmission. |
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 | | Elevated Final Drive
Final drives are isolated from ground and work tool induced impact loads for extended power train life.
- Allows for various undercarriage configurations.
- Modular design for quicker removal and installation.
- Helps keep contamination out of the system.
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Double Reduction Planetary Final Drive
The 572R Series II uses double reduction planetary final drives. The final drives are designed with three (3) planetary gears to spread high torque loads out evenly for long final drive life. |
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Splash Lubrication and Symmetric Duo-Cone® Seals
Splash lubrication and Duo-Cone seals maximize service life. |
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 | | Finger Tip Control
Finger Tip Control (FTC) combines steering, machine direction and gear selection into a single control system. These control functions can be simultaneously operated using only one hand for enhanced operator comfort and increased productivity. |
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Three-Speed Forward/Reverse Gear Selection
Three-speed forward/reverse gear selection is achieved simply by pressing the yellow speed selection buttons. These buttons are integrated into the Finger Tip Control group.
• Automatic shifting features and reduced lever efforts for easier upshift and downshift, increased operator comfort, reduced fatigue, and precise control. |
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Electronic Clutch and Brake Steering System
The electronic clutch and brake steering system incorporates low effort finger tip levers allowing the operator to work more precisely in close areas, around structures, obstacles and grade stakes. Pulling the left or right finger paddle causes the machine to turn according to the amount of paddle displacement.
• Aimed at operator comfort is the electric vertical adjustment of the FTC control group. This positions the operator’s arm for efficient ergonomics. |
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Machine Direction
Moving the machine’s transmission forward/neutral/reverse direction lever controls machine direction. |
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Auto-shift and Auto-kickdown
The Auto-shift settings include:
- First forward to second reverse.
- Second forward to second reverse.
- Second forward to first reverse.
Auto-kickdown automatically downshifts from any gear when the machine detects a significant increase in load. It helps to improve operator efficiency. Another feature aimed at operator comfort is an electric vertical adjustment of the FTC control group. This helps position the operator’s arm for efficient ergonomics. |
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Pipelayer
Hydraulic load line and boom winches provide excellent speed capability. Counterweight and frame design provide excellent stability while offering ample viewing area. |
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 | | Winches and Boom
- Independent hydraulic winches drive boom and hook drawworks.
- Oil-disc brakes provide smooth operation, positive retention of boom and hook positions.
- Modular design allows fast replacement, easy field service, and testing.
- Infinitely variable speed controls for boom and hook allow precise control.
- Tubular, cast-steel boom is rugged, delivers better fatigue life.
- Replaceable boom-mount bearings.
- Emergency free-fall function on load line control allows the operator to drop the load quickly.
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 | | Counterweight and Frame
- The narrow profile of the counterweight minimizes impact on viewing area.
- Mainframe consists of box-section frame welded to a cast bevel gear case.
- Counterweight is extended hydraulically for load balance.
- Service latch mechanically locks counterweight in extended position.
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 | | Drawbar
- Large jaw opening and pin diameter.
- Able to tow wide range of attachments.
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 | | Operator Station
Ergonomically designed for productivity and comfort. Controls are intuitive, low-effort, and easy to reach. Instrument panel is easy to read and informative. Simplified access with ladder on the left rear side of the machine. |
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Seat
Ergonomically designed and fully adjustable for maximum comfort. The seat cushion reduces the pressure on the lower back and thighs while allowing unrestricted arm and leg movement. |
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 | | Dash
The instrument panel, with easy to read analog gauges and warning lamps, keeps the operator aware of any potential problems. All gauges and readouts are easily visible in direct sunlight. Auto-shift and Auto-kickdown controls are located within easy reach of the operator. New footpads keep the operator stable and comfortable during side slope applications. |
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Caterpillar Monitoring System
Provides gauges to monitor the temperature of the engine coolant, hydraulic oil, and power train oil, plus the fuel level. Also provides alert indicators that monitor engine oil pressure, inlet manifold temperature, coolant flow, electrical charging system, transmission oil filter, air filter service indicator, engine fault warning light, work tool warning indicator, and hydraulic filter.
The monitoring system has:
- Easy to read digital tachometer.
- Self-test at every start.
- Fault code for easy troubleshooting.
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 | | Counterweight Control
Adjusts the position of the counterweight for added machine stability. |
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Finger Tip Control
Finger Tip Control (FTC) combines steering, machine direction and gear selection into a single control system, which can be operated with one hand for enhanced operator comfort and precise control. |
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 | | Ergonomic Work Tool Controls
Pipelayer controls are low effort and allow simultaneous, precise positioning of the load line and boom with one hand. |
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Load Line Speed Range
Allows the operator to select high or low. |
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Power Supply
The voltage converter provides two 12-volt power supplies. |
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 | | Access Ladder
Direct access to the operator’s station utilizing ladder on left side of the machine. |
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 | | Structure
Mainframe is designed and built for durability using the latest technology in engineering and manufacturing. Providing solid support and perfect alignment for major components. |
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Frame and Castings
Case and frames are built to absorb high impact shock loads and torsional forces. Castings are strategically located within the frame to add additional strength. Caterpillar uses robotic welding techniques in the assembly of the case and frames. This insures quality and reliability throughout the structure. The one-piece all welded chassis provides superior strength over bolted designs, and provides stiffness and durability.
- High strength steel mainframe resists impact shock loads.
- Computer-aided finite element analysis is used to evaluate and ensure high durability of the chassis by computer modeling it and identifying high stress area.
- Full scale structural testing to test integrity of the structures.
- Robotic welding provides deep penetration and consistency for long life, and reduces the chance for errors that may be made during manual welding.
- Precision top level machining for perfect alignment of bores and surfaces minimizes out of tolerance wear patterns and improves durability.
- Non-oscillating roller frames for greater stability in pipelaying applications.
- The recoil system is sealed and lubricated.
- Improved pipelayer structure mounting.
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 | | Optional Roll Over Protective Structure
Provides for increased operator protection. |
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Undercarriage
Elevated sprocket design for optimized balance and performance. The final drives are above the work area, isolating them from ground impact for long power train component life. |
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| | Elevated Final Drive
Final drives and power train components are raised above the working area, isolating them from ground induced impact loads and implement and roller frame alignment loads, extending power train life by reducing impact shock loads.
- Keeps sprocket teeth, bushings, seals, and final drive away from abrasive materials and moisture.
- Single reduction planetary final drives provide long lasting performance and durability.
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 | | Steel Sprocket Segments
572R Series 2 sprocket segment material is metallurgically optimized to be fracture resistant. This allows the sprocket to live longer and better match a bushing turn. |
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 | | Undercarriage Arrangements
Standard Arrangement: 660 mm (26 in) single grouser shoes made from heat-treated, rolled steel for added strength. Long track frame and wide gauge enhance track contact area, providing a very stable working base.
Low Ground Pressure (LGP) arrangement (optional):
- 760 mm (30 in) single grouser slipped shoes.
- Specially designed to work in soft and spongy conditions.
- Wide track shoes increase track contact area and reduce ground pressure for excellent flotation.
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 | | Heavy-Duty Sealed and Lubricated Track
Permanently coats the track pin with a sealed-in lubricant, minimizing metal-to-metal contact.
- Virtually eliminates internal pin and bushing wear.
- Lubricant is held in a reservoir in the track pin.
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Complete Guarding
Caterpillar undercarriages are designed with full length guarding on top of the track roller frame. This prevents abrasive materials from falling down on moving parts. |
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 | | Roller Frames
Roller frames are tubular, to resist bending and twisting. |
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Recoil System
The recoil system is protected from the elements and maintained in a sealed oil-filled cavity for years of reliable service. |
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Hydraulic Track Adjuster
Adjusting the track on the 572R Series 2 is done hydraulically by removing a plate on the top of the roller frames. Adding or removing grease adjusts the track for optimum operation. |
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Guiding Guards
Heavy-duty track guiding/guard attachment provides maximum protection to track pin bosses roller flanges, and end guides. |
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Optional High Flange Improved Track Rollers
Combined with center or full length roller guard attachments greatly improve track guiding for demanding side slope conditions. |
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Serviceability
Major modular components are designed for excellent serviceability and allow fast in-field component exchange. |
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 | | Product Link
This option allows the customer or dealer to obtain machine diagnostics and location from their offices. Product Link provides updates on service meter hours, machine condition, machine location, as well as integrated mapping/route planning. |
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 | | Electronic Monitoring System
Features a flexible monitoring system that is easily upgraded by flashing software rather than replacing the module, reducing parts cost. As technology changes and new electronics and software become available, the machine's monitoring system is easily updated. |
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Built-in Serviceability
Less service time means more working time. Major components are designed as modules and most can be removed without disturbing or removing other components. |
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Grouped Service Points and Accessibility
Designed with ease and simplicity of service in mind.
- Grouped pressure taps allow you to measure and troubleshoot the hydraulic system. Two groups of remote taps are available, one in the right hand fender and the second behind the transmission guard on the rear of the machine.
- Hinged engine doors with mechanical stops provide easy access to secondary fuel filters, oil filters, engine oil filler tube, and engine air filter.
- Left side enclosure access doors provide easy access to the batteries, transmission fill tube, fuse box, washer bottle, disconnect switch, transmission oil level, and machine security system (optional).
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 | | High-Speed Oil Change System
High-speed oil change system optional for quick service to engine and power train oil. |
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Hinged Bottom Guard and Radiator Grille
For quick accessibility, service points such as the radiator grille and bottom guard are hinged for improved serviceability and reduced downtime. |
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Quick Disconnect Fittings
Quick disconnect fittings allow for fast diagnosis of the power train and attachment oil systems. |
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Service Intervals
The time between fluid and filter service intervals minimizes downtime and maximizes productivity for the 572R II.
- Engine oil - 500 hours.
- Engine oil filter - 500 hours.
- Fuel filters - 500 hours.
- Transmission oil - 1000 hours.
- Transmission filter - 2000 hours.
- Hydraulic oil - 2000 hours.
- Hydraulic filter - 500 hours.
- Final drive oil - 2000 hours.
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| | Diagnostics
Cat 572R Series 2 diagnostic and troubleshooting capabilities are among the best. The machine dashboard allows for quick identification of a problem and its cause, utilizing a three level warning system. Diagnostic connector allows Caterpillar dealers to quickly troubleshoot or access stored data with the use of Electronic Technician (Cat ET) or ECAP. |
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Ecology Drains
Ecology drains provide an environmental method to drain fluids. Standard for the engine oil, coolant, hydraulic oil, fuel tank, and power train case. Optional for the transmission and torque converter. |
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Advanced Modular Cooling System
Individual radiator core modules are easily serviced without major component removal. |
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Easy Engine Maintenance
Many parts can be rebuilt and are available as remanufactured components.
- Parent-metal block can be rebored twice and dry-sleeved.
- Connecting rods can be removed through cylinder tops.
- Camshaft followers and push rods can be replaced without removing camshaft.
- Extended oil and engine filter change intervals up to 500 hours.
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Pressure Test Points
Pressure test points for power train and hydraulic systems are provided. |
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 | | Fast Fuel System
The 572R Series II includes an optional fast fuel fill attachment with positive fuel shut-off to prevent fuel spillage. |
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S•O•SSM Analysis
Scheduled Oil Sampling made easier through live sampling ports for the engine oil, power train, coolant, and hydraulics. |
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 | | Total Customer Support
Your Caterpillar dealer offers a wide range of services that can be set up with a Customer Support Agreement (CSA). Your dealer can customize a plan for you, covering machine and attachment selection, replacement options, PM service, to total machine maintenance. |
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Product Support
A wide range of services can be set up under a Customer Support Agreement with the equipment purchase. Assist the customer in choosing a plan that can cover everything from the machine and attachment selection to replacement. This will help get the best return on their investment. |
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Remanufactured Components
Consider remanufactured parts. They receive the same warranty and reliability as new products at a cost savings of 40 to 70 percent. |
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Service Capability
Whether in the fully equipped shop or in the field, offer well trained service technicians using the latest technology and tools. |
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Selection
Assist the customer with detailed comparisons of the machines they are considering before they buy. How long do components last? What is the cost of preventive maintenance? What is the true cost of lost production? |
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Purchase
Consider the financing options available as well as day-to-day operating costs. This is also the time to look at services that can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run. |
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Replacement
Repair, rebuild, or replace? You can help evaluate the cost involved so they can make the right choice. |
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Maintenance
More and more equipment buyers are planning for effective maintenance before buying equipment. Assist them in choosing from your dealership's wide range of maintenance services at the time of their purchase. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling and Technical Analysis help avoid unscheduled repairs. |
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