Overview
The 12H blends productivity and durability to give you the best return on your investment. The Cat® C-9 engine, direct-drive power shift transmission and load-sensing hydraulics are perfectly balanced, working together to deliver top productivity in all applications.
Specifications
| Base Power (1st Gear) - Net | — |
| Blade Width | — |
| Engine Model | Cat® C-9 ETA VHP |
Benefits & Features
Specifications
| Base Power (1st Gear) - Net | — |
| Engine Model | Cat® C-9 ETA VHP |
| VHP - Gears 4-8, Net | — |
| VHP Plus - Gears 1-3, Net | — |
| VHP Plus - Gears 4-6, Net | — |
| VHP Plus - Gears 7-8, Net | — |
| Base Power (All Gears) - Gross | — |
| VHP - Gears 1-3, Gross | — |
| VHP - Gears 4-8, Gross | — |
| VHP Plus - Gears 1-3, Gross | — |
| VHP Plus - Gears 4-6, Gross | — |
| VHP Plus - Gears 7-8, Gross | — |
| Bore | — |
| Stroke | — |
| Speed at Rated Power | 2000 RPM |
| Torque Rise | 50% |
| Base Power (All Gears) - Net | — |
| Maximum Torque | — |
| Displacement | — |
| VHP - Gears 1-3, Net | — |
| Number of Cylinders | 6 |
| Derating Altitude | — |
| Standard - Fan Speed - Maximum | 1210 RPM |
| Standard - Fan Speed - Minimum | 500 RPM |
| High Ambient - Fan Speed - Maximum | 1350 RPM |
| High Ambient - Fan Speed - Minimum | 500 RPM |
| High - Ambient Capability | — |
| Forward/Reverse Gears | 8 fwd / 6 rev |
| Transmission | Direct drive, power shift |
| Brakes - Service | Air actuated multiple oil disc |
| Brakes - Service - Surface Area | — |
| Brakes - Parking | Air-actuated, multiple oil-disc |
| Brakes - Secondary | Dual circuit |
| Circuit Type | Closed center load sense |
| Pump Type | Variable piston |
| Pump Output | — |
| Maximum System Pressure | — |
| Reservoir Tank Capacity | — |
| Standby Pressure | — |
| Top Speed - Forward | — |
| Top Speed - Reverse | — |
| Turning Radius - Outside Front Tires | — |
| Steering Range - Left/Right | 50 degrees |
| Articulation Angle - Left/Right | 20 degrees |
| Forward - 1st | — |
| Forward - 2nd | — |
| Forward - 3rd | — |
| Forward - 4th | — |
| Forward - 5th | — |
| Forward - 6th | — |
| Forward - 7th | — |
| Forward - 8th | — |
| Reverse - 1st | — |
| Reverse - 2nd | — |
| Reverse - 3rd | — |
| Reverse - 4th | — |
| Reverse - 5th | — |
| Reverse - 6th | — |
| Fuel Capacity | — |
| Cooling System | — |
| Hydraulic System - Total | — |
| Hydraulic System - Tank | — |
| Engine Oil | — |
| Transmission - Differential - Final Drives | — |
| Tandem Housing - Each | — |
| Front Wheel Spindle Bearing Housing | — |
| Circle Drive Housing | — |
| Circle - Diameter | — |
| Circle - Blade Beam Thickness | — |
| Drawbar - Height | — |
| Front-Top/Bottom Plate - Width | — |
| Front-Top/Bottom Plate - Thickness | — |
| Front-Side Plates - Width | — |
| Front-Side Plates - Thickness | — |
| Front-Linear Weights - Minimum | — |
| Front-Linear Weights - Maximum | — |
| Front-Section Modulus - Minimum | — |
| Front-Section Modulus - Maximum | — |
| Front Axle - Height to Center | — |
| Front Axle - Wheel Lean - Left/Right | 18° |
| Front Axle - Total Oscillation per Side | 32° |
| Height | — |
| Width | — |
| Sidewall Thickness - Inner | — |
| Sidewall Thickness - Outer | — |
| Drive Chain Pitch | — |
| Wheel Axle Spacing | — |
| Tandem Oscillation - Front Up | 15° |
| Tandem Oscillation - Front Down | 25° |
| Blade Width | — |
| Moldboard - Height | — |
| Moldboard - Thickness | — |
| Arc Radius | — |
| Throat Clearance | — |
| Cutting Edge Width | — |
| Cutting Edge Thickness | — |
| End Bit - Width | — |
| End Bit - Thickness | — |
| Blade Pull - Base GVW | — |
| Blade Pull - Maximum GVW | — |
| Blade Down Pressure - Base GVW | — |
| Blade Down Pressure - Maximum GVW | — |
| Circle Centershift - Right | — |
| Circle Centershift - Left | — |
| Moldboard Sideshift - Right | — |
| Moldboard Sideshift - Left | — |
| Maximum Blade Position Angle | 90° |
| Blade Tip Range - Forward | 40° |
| Blade Tip Range - Backward | 5° |
| Maximum Shoulder Reach Outside of Tires - Right | — |
| Maximum Shoulder Reach Outside of Tires - Left | — |
| Maximum Lift Above Ground | — |
| Maximum Depth of Cut | — |
| Ripping Depth - Maximum | — |
| Ripper Shank Holders | 5 |
| Shank Holder Spacing - Minimum | — |
| Penetration Force | — |
| Pry-Out Force | — |
| Machine Length Increase, Beam Raised | — |
| Front, V-Type - Scarifier Shank Holder Spacing | — |
| Front, V-Type - Scarifying Depth, Maximum | — |
| Front, V-Type - Working Width | — |
| Front, V-Type - Scarifier Shank Holders | 11 |
| Front, Straight - Working Width | — |
| Front, Straight - Scarfying Depth, Maximum | — |
| Front, Straight - Scarifier Shank Holders | 17 |
| Front, Straight - Scarifier Shank Holder Spacing | — |
| Rear - Working Width | — |
| Rear - Scarifier Shank Holders | 9 |
| Rear - Scarifier Shank Holder Spacing | — |
| Gross Vehicle Weight - Maximum - Front Axle | — |
| Gross Vehicle Weight - Maximum - Rear Axle | — |
| Gross Vehicle Weight - Base - Front Axle | — |
| Gross Vehicle Weight - Base - Rear Axle | — |
| Gross Vehicle Weight - Maximum - Total | — |
| Gross Vehicle Weight - Base - Total | — |
| Height - Top of Cab | — |
| Height - High Profile Cab | — |
| Height - No Cab | — |
| Length - Counterweight to Ripper | — |
| Width - Outside Front Tires | — |
| Length - Front Axle to Mid Tandem | — |
| Length - Front Tire to Rear of Machine | — |
| Length - Front Axle to Moldboard | — |
| Length - Between Tandem Axles | — |
| Width - Outside Rear Tires | — |
| Width - Tire Center Lines | — |
| Height - Front Axle Center | — |
| Height - Exhaust Stack | — |
| Height - Top of Cylinders | — |
| Ground Clearance - Rear Axle | — |
Benefits & Features
Engine
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.
Power Train
Power Shift Transmission
Designed and built specifically for Cat motor graders, the rugged transmission provides on-the-go, full-power shifting as well as inching capability.
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.
Hydraulics
Load Sensing Hydraulics
A load sensing variable displacement pump and the advanced proportional priority pressure-compensating (PPPC, or "triple-PC") hydraulic valves provide superior implement control and enhanced machine performance and efficiency. Continuously matching hydraulic flow and pressure to power demands creates less heat and reduces power consumption.
Implement Control Valves
PPPC valves have different flow rates for the head and rod ends of the cylinder. This insures consistent extension and retraction properties for each cylinder, and improves operator 'feel' and system response. All control valves use lock valves to maintain blade settings. Line relief valves protect cylinders from excessive pressure.
Balanced Flow
Hydraulic flow is proportioned to ensure all implements operate simultaneously. If demand exceeds pump capacity, all cylinders are reduced by the same ratio. The result is improved productivity in virtually any application.
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.
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.
Heavy Duty XT™ Hose
Caterpillar hose technology allows high pressures for maximum power and reduced downtime, while excellent routing minimizes exposure to damage.
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.
Drawbar, Circle, Moldboard
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.
Blade Positioning
The blade linkage design provides extensive moldboard positioning, most beneficial in mid-range bank sloping and in ditch cutting and cleaning.
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.
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.
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.
Structures
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.
Rear Frame
Rear frame has two box-sectioned channels integral with fully welded differential case for a solid working platform.
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.
Serviceability
Service Center
- A 'Service Center' on the left-hand side provides easy, centralized access to most check and maintenance points. Routine inspection and service are faster and easier, for better machine availability and lower operating costs.
- Large hinged doors provide easy access to the adjacent engine and maintenance service compartments.
- Engine and hydraulic oil checkpoints, coolant gauges, and air filters
- Tandem oil checkpoint
- Spin-on filters for oils, fuel, coolant
- Remote lubrication points, purge valves and ecology drain lines
- Sample ports for engine, hydraulic, transmission fluids, coolant and fuel, encourages preventive maintenance and diagnostics like the S·O·SSM Analysis program.
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.
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.
Cat XT Hose
Caterpillar XT hose technology allows high pressures for maximum power and reduced downtime, while excellent routing minimizes exposure to damage.
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.
Radiator Cleanout Access
Radiator clean-out access gives the operator the ability to clear away debris and other materials that build up around the radiator. This ensures that the radiator functions properly keeping the engine cool and increasing component life.
Operator's Station
Comfort and Convenience
Comfort and convenience are designed into every feature of the operator's station.
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.
Environmentally Responsible Design
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.
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.
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.
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.
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.
Ozone Protection
To help protect the earth's ozone layer, air-conditioning units use a refrigerant free of chlorofluorocarbons (CFCs).
Customer Support
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.
Machine Selection
Make detailed comparisons of the machines under consideration before purchase. Cat dealers can estimate component life, preventive maintenance cost, and the true cost of lost production.
Purchase
Look past initial price. Consider the financing options available as well as day-to-day operating costs. 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.
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.
Operation
Improving operating techniques can boost your profits. Your Cat dealer has videotapes, literature and other ideas to help you increase productivity, and Caterpillar offers certified operator training classes to help maximize the return on your machine investment.
Maintenance Services
Talk to your dealer about the range of available maintenance services. 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 avoid unscheduled repairs.
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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Standard Equipment
- ELECTRICAL
- Alarm, back-up
- Alternator, 35 ampere, sealed
- Batteries, maintenance free, 750 CCA
- Electrical system, 24 volt
- Lights, stop and tail
- Motor, starting
- Product Link connection
- OPERATOR ENVIRONMENT
- Accelerator
- Ashtray and lighter
- Coat hook
- Control console, adjustable
- Cup holder
- EMS III operator warning system
- Panel gauges inside cab
- Hydraulic controls, load sensing
- Meter, hour, digital
- Mirror, inside rearview, wide angle
- Mounting bracket, general purpose
- Power steering, hydraulic
- ROPS cab, sound suppressed, low profile
- Seat, cloth, static
- Seat belt, retractable 76 mm (3 in)
- Steering wheel, tilt, adjustable
- Storage area for cooler/lunchbox
- Sunscreen, front windshield
- Throttle control, electronic
- Washer / wipers, (3) front windshields
- Windows, fixed lower front
- POWERTRAIN
- Air cleaner
- Air to air after cooler (ATAAC)
- Brakes - oil disc, four-wheel air actuated
- Demand fan
- Differential, lock-unlock
- Engine, C-9 DITA ATAAC diesel
- Fuel tank, sediment drain
- Fuel-water separator
- Lube for life pump drive shaft
- Muffler, under hood
- Parking brake - multi-disc, sealed and oil cooled
- Pre-screener
- Priming pump, fuel
- Serpentine belt, automatic tensioner
- Tandem drive
- Transmission
- OTHER STANDARD EQUIPMENT
- Antifreeze -35°C (-30°F)
- Bumper, rear, integrated, with hitch
- Clutch, circle drive slip
- Cutting edges
- Doors, engine compartment, locking
- Drawbar
- Endbits - 16mm (5/8 in) DH-2 steel, mounting bolts
- Engine shutdown, ground level
- Frame, articulated with safety lock
- Fuel tank, 100 gallon (378 L)
- Fueling, ground level
- Horn, air
- Moldboard
- Radiator cleanout access
- S•O•SSM ports: engine, hydraulic, transmission, coolant, fuel
- Tool box
- TIRES, RIMS, & WHEELS
- Partial allowance: 13.00-24 10PR on 9" single piece rims
Optional Equipment
- Cutting edges for 22 mm (7/8 in) thick blade
- 203 mm x 19 mm (8 in x 3/4 in) for 3.7 m blade
- 203 mm x 19 mm (8 in x 3/4 in) for 4.1 m blade
- 203 mm x 16 mm (8 in x 5/8 in) for 3.7 m blade
- 203 mm x 16 mm (8 in x 5/8 in) for 4.1m blade
- Cutting edges for 25 mm (1 in) thick blade
- 203 mm x 19 mm (8 in x 3/4 in) for 3.7 m blade
- 203 mm x 19 mm (8 in x 3/4 in) for 4.1 m blade
- Extensions, blade 610 mm (2 ft) right and left
- for 22 mm (7/8 in) thick blade - 114 kg (250 lb)
- for 25 mm (1 in) thick blade - 148 kg (325 lb)
- Lighting systems:
- bar mounted, directional and headlights - 13 kg (28 lb)
- cab mounted, directional and headlights - 9 kg (20 lb)
- cab and bar mounted, directional, headlights and work lights - 22 kg (48 lb)
- cab and bar mounted, high, directional, headlights and work lights - 22 kg (48 lb)
- work lights, front and rear - 6 kg (13 lb)
- snow wing light, right - 18 kg (40 lb)
- warning light, cab or canopy mounted - 3 kg (6 lb)