Engine
The Cat C-9 engine is designed and rated to handle the tough loads. The Variable Horsepower option maximizes response, power, and efficiency, while the direct drive, power shift transmission optimizes blade control and versatility. |
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 | | Cat C-9 DITA ATAAC Engine
The innovative Cat C-9 diesel engine delivers large-engine performance from a compact engine design. This six-cylinder engine is turbocharged and air-to-air aftercooled. With high displacement and low rated speed, the C-9 provides excellent fuel economy and durability that can significantly reduce operating costs. |
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Variable Horsepower (VHP) and VHP Plus
Automatically increases horsepower in higher gears when the machine can use it. In lower gears where traction is limited, horsepower is limited, reducing wheel slip and conserving fuel. In applications such as snow removal, this power allows higher travel speeds and faster snow removal for more snow clearing in less time. Also, the higher rimpull in all gears maximizes performance during high-speed winging and heavy snow load applications. |
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Lugging Performance
High torque output and torque rise makes the C-9 very responsive. Its superior lugging capability pulls through sudden, short-term increases in loads, reducing the need to downshift while maintaining consistent, desirable grading speeds to get the work done faster. |
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Fuel Efficiency
Caterpillar state-of-the-art electronically controlled, computer-actuated unit injection fuel system has high injection pressure for complete fuel combustion, more efficient fuel use and reduced emissions. The high-compression-ratio system provides dependable cold-starting performance. The dual-filter system reduces component wear. |
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Turbocharged and Air-To-Air Aftercooled
Turbocharger packs more dense air into the cylinders for more complete combustion and lower emissions, improving performance and engine efficiency. These benefits are especially useful at high altitudes. Air-to-air aftercooler reduces smoke and emissions by providing cooler inlet air for more efficient combustion. This also extends the life of the piston rings and bore. |
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Extended Engine Life
The large bore-stroke design and conservative power rating minimize internal stresses and increase component life. The low engine speeds reduce engine wear and sound levels. |
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Hydraulic Demand Fan
The hydraulic demand fan control automatically adjusts cooling fan speed according to engine cooling requirements. This system reduces demands on the engine, putting more power to the ground and improving fuel efficiency. |
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Caterpillar Engine Oil
It is formulated to optimize engine life and performance and is strongly recommended for use in Cat diesel engines. The engine oil change interval is increased to 500 hours. |
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Improved Torque
Power curves customized for the 12H increase peak torque for higher ground speeds and enhanced productivity. Rimpull has been increased in all gears for greater productivity. |
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Emissions Compliant
The 12H is even more environmentally friendly than its predecessors with reductions in NOx, hydrocarbon, and particulate emissions. The Cat C-9 meets or exceeds all U.S. EPA Tier 2 and EU Stage II emissions control requirement. |
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 | | Power Train
The power shift transmission takes full advantage of the powerful C-9 engine. Variable Horsepower uses specific torque curves for each gear range for optimum performance. Dual air system and multi-disc oil brakes assure reliable braking control. |
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| | Power Shift Transmission
Caterpillar transmissions are designed and built specifically for Cat motor graders. The transmission provides on-the-go, full-power shifting as well as inching capability. |
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Direct Drive
Delivers superior fuel efficiency and "feel" of blade loads, material hardness and ground speed. |
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Gear Selection
Eight forward speeds and six reverse speeds give the operator a wide operating range for maximum flexibility. With four gear selections below 10.3 km/h (6.4 mph), the operator can precisely match working speeds to job conditions for maximum productivity in earthmoving applications. Gears five, six and seven provide the optimal speed range for efficient snow removal operations. Gear 8 is designed for roading. |
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Electronic Transmission Control
Produces easy, smooth shifts so the operator can maintain uniform surfaces if shifting is required. Smooth shifts also extend the life of the transmission by reducing stress on transmission clutches. A single lever controls direction, gear and the parking brake. |
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Electronic Clutch Pressure Control
ECPC smoothes shifts and improves inching control, which increases operator comfort and productivity. It uses input from the transmission and operator controls to modulate the directional clutches and produce consistent shifting. |
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Electronic Overspeed Protection
The transmission control upshifts the transmission to relieve overspeed conditions. The transmission control will also prevent a downshift until machine speed is within the range for the requested gear. This can prevent damage and reduce component wear. |
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Inching Pedal
The inching pedal delivers precise control of machine movements with excellent modulation and low pedal effort. This is especially important in finish grading or other close-quarter work. The ECPC allows optimum inching modulation for each specific gear, providing the operator better control and feel when inching is needed. The inching pedal has also been redesigned and repositioned for superior modulation and improved operator comfort. |
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Optional Autoshift
The autoshift switch, located in the cab, allows the operator to enable or disable the autoshift feature. When autoshift is engaged, the operator can place the transmission shifter in any gear higher than 3rd (4F through 8F or 4R through 6R), and the transmission control will automatically shift the transmission through the proper gear ranges (from 3rd through the selected gear) for the machine speed and operating conditions. Gears 1F through 3F and 1R through 3R are manually selectable only. The "autoshift enabled" indicator lamp is located in the indicator lamp panel. It will illuminate when the autoshift feature is enabled. |
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Dual Air Tanks
Supply braking capacity to each side of the machine. This system ensures secondary braking capability in the event a failure occurs in a single brake line. The dual air system also has a large reserve for stalled-engine braking. |
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 | | Brakes
Caterpillar multi-disc brakes offer a large surface area for dependable, extended-life braking. The air-actuated service brakes, located in each of the four wheel spindle housings, are sealed, adjustment free, and lubricated and cooled by tandem housing oil. The parking/emergency brakes, located in the transmission on the output shaft, are spring actuated and air pressure released. When engaged, they neutralize the transmission and lock the wheels. |
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 | | Hydraulics
The load-sensing hydraulic system lowers power consumption and system heat. The advanced PPPC control valves provide low lever effort, balanced flow and consistent cylinder speeds for outstanding blade control. Blade float is incorporated into the blade lift valves. |
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Load Sensing Hydraulics
H-Series motor graders use the advanced proportional priority pressure-compensating (PPPC) hydraulic valves. This advanced "triple-PC" system is unique to Caterpillar and provides superior implement control and enhanced machine performance and efficiency. |
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Implement Control Valves
Designed and built by Caterpillar specifically for motor graders, PPPC valves have different flow rates for the head end and the rod end of the cylinder. This insures consistent extension and retraction properties for each cylinder, for unmatched implement control. To help maintain exact blade settings, lock valves are built into all control valves. Line relief valves are also incorporated into selected control valves to protect the cylinders from excessive pressure. |
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Low Operator Effort
The hydraulic implement controls feature short lever throws and low lever efforts in both directions. This design reduces operator fatigue and helps keep the operator alert and productive an entire shift. |
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Controls Spaced
Properly spaced control levers and short lever throws allow the operator to easily manage multiple controls with one hand. |
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Balanced Flow
When the operator uses several controls at the same time, flow is proportioned to ensure all implements operate simultaneously with little effect on the engine or implement speeds. If hydraulic demand exceeds pump capacity, all cylinder velocities will be reduced by the same ratio. The result is improved productivity in virtually any application. |
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Blade Float
Blade float, incorporated into the blade lift control valves, allows the blade to move freely under its own weight. By floating both cylinders, the blade can follow the contours of the road when removing snow. Floating only one cylinder permits the toe of the blade to follow a hard surface while the operator controls the slope with the other lift cylinder. |
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Independent Oil Supply
Large separate hydraulic oil supply prevents cross-contamination and provides proper oil cooling, which reduces heat build-up and extends component life. |
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Heavy Duty XT™ Hose
The use of Caterpillar hoses throughout the machine ensures state-of-the-art durability and high pressures for maximum power availability, and longer hose life for less downtime. O-ring face seals assure rock-solid connections that maintain pressure and reduce oil leaks. Excellent hose routing minimizes exposure to damage, increasing hose life and enhancing reliability. |
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Optional Hydraulic Lockout
Mechanically locks all moldboard, machine, and attachment control levers during machine roading. This prevents implements from being accidentally engaged when the motor grader is traveling down the road. |
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Drawbar, Circle, Moldboard
Flexible moldboard positioning and a long wheelbase improve material handling. Rugged construction and replaceable wear parts minimize operation costs. |
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 | | Blade
Heat treated moldboard rails, through-hardened, curved DH-2™ steel cutting edge and end bits, and replaceable metallic wear inserts assure a long, reliable service life. Three sideshift mounting locations for the optional moldboard add flexibility. |
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 | | Blade Positioning
The blade linkage design provides extensive moldboard positioning, most beneficial in mid-range bank sloping and in ditch cutting and cleaning. |
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| | Blade Angle
A long wheelbase allows the operator to obtain an aggressive moldboard angle. This aggressive angle permits material to roll more freely along the blade, which reduces power requirements. This is particularly helpful in handling very dry materials, cohesive soils, snow and ice. |
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Circle Construction
One-piece forged circle with hydraulically driven motor stands up to high stress loads. Raised wear surfaces prevent circle teeth wear against the drawbar. Sixty-four uniformly spaced teeth on the front 240° of the circle are flame cut and heat induction hardened to resist wear. And the circle, with 360° rotation, is secured to the drawbar by six vertically and horizontally adjustable shoes for maximum support. |
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Replaceable Wear Items
Tough, durable nylon composite wear inserts are located between the drawbar and circle, and between the support shoes and circle. This sacrificial wear system helps keep components tight for fine grading and allows easy replacement. These inserts reduce rotational friction, resulting in extended component life. |
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Circle Drive Slip Clutch
The standard circle drive slip clutch protects the drawbar, circle and moldboard from shock loads when the blade encounters immovable objects. It also reduces the possibility of the grader making abrupt directional changes in poor traction conditions. |
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Drawbar Construction
The Y-frame drawbar is constructed of two solid beams for high strength and optimum durability, as well as precise blading control. And the yoke plate completely covers the top of the circle. |
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Blade Lift Accumulators
Optional blade lift accumulators absorb vertical shocks encountered when the moldboard contacts immovable objects. This option is especially useful in rough grading and rocky areas. |
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 | | Structures
The 12H frame is designed and built to exceed the expectations of the customer. |
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Integrated Bumper
The integrated bumper ties the rear frame together into a cohesive unit to provide a solid platform for the C-9 power train. This is especially important in ripping and snow removal applications where graders are equipped with snow wing attachments. |
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Rear Frame
Rear frame has two box-sectioned channels integral with fully welded differential case for a solid working platform. |
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Front Frame
Continuous top and bottom plate construction provides consistency and strength. The flanged box section design removes welds from high stress areas, improving reliability and durability, and increasing resale values for the customer. |
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Front Axle
The live spindle is supported by an inner and outer tapered roller bearing, with the large bearing positioned outside of the spindle where the load factors are the highest. The sealed, maintenance-free spindle compartment keeps bearings lubricated in oil and free from contaminants. Induction hardened bores ensure steering and tie rod joint durability and accuracy. |
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 | | Serviceability
Caterpillar re-engineered inspection and service points, grouping them into a convenient left-hand side, ground level 'service center.' Ground level fueling and extended engine and hydraulic oil change intervals help minimize downtime. |
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Service Center
A 'Service Center' on the left-hand side provides centralized, ground level access to most check and maintenance points. Routine inspection and service are faster and easier without the obstruction of snow wings and other attachments commonly found on the right side of the machine. |
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Other Service Points
Include remote purge valves and drain lines, remote lubrication and improved access to service points. Some component improvements have eliminated the need for service. Maintenance is fast and easy, maximizing machine availability and reducing operating costs. |
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Less Service Required
Some component improvement have eliminated the need for service. |
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Modular Component Design
Major components are modular, so they can be serviced or removed independently. Service can be complete faster, with less downtime and lower cost. |
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Fuel Tank
The 378 L (100 gal) ground level fuel tank allows longer work shifts and reduces refueling times. An easily accessible fuel tank sediment drain enables the operator to remove sediment accumulation, reducing the risk of fuel system damage. |
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Extended Oil Change Interval
Operate a full 500 hours between engine oil and filter changes, 4000 hours between hydraulic oil changes, and 6000 hours between engine coolant changes. This reduces downtime and operating expense. |
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Cat XT Hose
Caterpillar XT hose technology allows high pressures for maximum power and reduced downtime, and excellent routing minimizes exposure to damage. |
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O-Ring Face Seals
Cat O-ring face seals assure rock-solid connections that maintain pressure and reduce oil leaks. Intelligent hose routing minimizes exposure to damage, increasing hose life and enhancing reliability. |
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Radiator Cleanout Access
Access panels, a hinged radiator core, more space between the cores, and an air chuck and wand make keeping the radiator clear of debris easier than ever. This ensures that the radiator functions properly, keeping the engine cool, increasing machine performance and component life. |
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 | | Operator's Station
Low effort blade controls, electronic throttle control, EMS III monitoring system, and improved ventilation provide world-class operator control and comfort. Excellent front and rear visibility can increase operator confidence and productivity. |
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Comfort and Convenience
Comfort and convenience are designed into every feature of the operator's station. |
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Autoshift Transmission
Improves ease of operation and maximizes productivity by automatically shifting the transmission at optimal shift points. |
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Optimized Inching Modulation
Electronic Clutch Pressure Control (ECPC) optimizes inching modulation and smoothes shifting. This new feature also eliminates cable control, improving reliability and enhances cold oil characteristics. |
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Electronic Throttle Control
ETC provides easier, more precise, more consistent throttle operation. Two modes on a single switch offer flexibility for varying applications and operator preference. Like cruise control, ETC improves fuel efficiency. |
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Electronic Monitoring System
The Cat Electronic Monitoring System (EMS) III module monitors critical machine systems. The EMS-III module monitors some system parameters directly, through sensors hard-wired to the module. In addition, a Cat Data Link connection allows the EMS-III module to monitor other parameters through communications with electronic control modules on the machine. The EMS-III module uses the Cat Data Link to communicate with the ET service tool. A connector is provided to connect the EMS "clicker box" service tool directly to the EMS-III module. The EMS-III module controls the quad gauge module displays and the speedometer / tachometer module displays through the SPI Data Link. The EMS-III module acts as the synchronized system clock "master" ECM. |
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Controls On Steering Console
Controls and switches are located on the steering console, shift console and right cab post, all within easy reach. Gauges are located inside the cab, directly in front of the operator. |
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Backlit Controls
Rocker switches and transmission shifter are backlit for nighttime operation. |
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Optional Air Conditioner / Heater
The optional heater and air conditioner arrangements help create a comfortable work environment, even in the bitter cold or heat and humidity. The high-capacity systems dehumidify the air as well as pressurize the cab, which keeps the air fresh and seals out dust. Multiple additional vents evenly distribute air throughout the cab for clear windows and operator comfort. |
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Suspension Seat
Optional contour series suspension seat features fold-up armrests and a retractable seat belt. The seat conforms to the contours of the body, and can be adjusted easily for optimal support and comfort. Seat controls are located in plain view in front and to the left of the operator. |
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Fresh Air Filters
Located above each cab door for quick replacement. |
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Optional 12V Power Port
Available for use with computers, cellular phones or other electronic equipment. |
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 | | Exceptional Visibility
Operator's console was redesigned, and large side windows allow a clear view of the moldboard heel and tandem tires. The 12H has a wide rear window and tapered engine hood. The air dryer and air leaner were moved, and the precleaner and muffler were aligned. Operators can work more confidently and efficiently. |
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 | | Environmentally Responsible Design
New engine arrangements and operator station designs reduce emissions to meet current and anticipated regulations for interior and exterior sound levels, emissions, exhaust. |
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Quiet Cab
The resiliently mounted engine and transmission reduce interior engine noise and vibration. With the sound suppression group, interior sound levels are 75dB(A), per ISO 6394. Lower interior noise levels improve operator working conditions. |
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Quiet Machine
Exterior sound levels are 109dB(A) per ISO 6395. The sound suppression group lowers exterior sound levels below 108dB(A), complying with the EU 2000/14/EC sound limit of 109 dB(A). This quiet operation lets the 12H work with minimal disturbance to the surroundings. |
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Low Emissions
The 12H Motor Grader is even more environmentally friendly than its predecessors with reductions in NOx, hydrocarbon, and particulate emissions. It meets or exceeds all U.S. EPA Tier 2 and EU Stage II emissions control standards worldwide. |
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Fuel Efficient
Caterpillar state-of-the-art electronically controlled, unit injection fuel system has high injection pressure for complete fuel combustion, increased fuel efficiency and reduced emissions. |
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Dry Machine
Lubricant fill points and filters are designed to minimize spillage. O-ring face seals, Cat XT hose and Cat hydraulic cylinders protect against leaks to help protect our environment. |
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Extended Oil Change Interval
Operate a full 500 hours between engine oil and filter changes, 4000 hours between hydraulic oil changes, and 6000 hours between engine coolant changes. This reduces downtime and operating expense. |
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Ecology Drains
Make regular maintenance easier and help prevent spills when changing fluids. |
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Ozone Protection
To help protect the earth’s ozone layer, air-conditioning units use a refrigerant free of chlorofluorocarbons (CFCs). |
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 | | Customer Support
Your Cat dealer offers a range of services that help you operate longer with lower costs. |
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Product Support
You will find nearly all parts at our dealer parts counter. Cat dealers use a world-wide computer network to find in-stock parts to minimize machine down time. Save money with genuine Cat Reman parts. You receive the same warranty and reliability as new products at substantial cost savings. |
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Machine Selection
Cat Dealers can help make detailed comparisons of the machines under consideration before purchase. They have sophisticated software that can estimate component life, preventive maintenance cost, and the true cost of lost production. They can also help balance equipment fleets for different kinds of applications to maximize production at the lowest cost. |
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Purchase
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. |
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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. |
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Operation
Improving operating techniques can boost your profits. Your Cat dealer has training videotapes, literature and other ideas to help you increase productivity. Caterpillar also offers certified operator training classes to help maximize the return on your machine investment. |
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Maintenance Services
Smart equipment buyers are planning for effective maintenance before buying equipment. Choose from your dealer's wide range of maintenance services at the time you purchase your machine. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S·O·SSM Analysis and Coolant Sampling and Technical Analysis help you avoid unscheduled repairs. |
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Replacement
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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