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Caterpillar 844H Wheel Dozer
Caterpillar 844H Wheel DozerEngineered for demanding work in large dozing applications, the Cat 844H Wheel Dozer is an ideal match for power generating utilities, clean up, road maintenance and production dozing at mines industry. |  |  | |||
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 | Overview & Specifications | |  | Features & Benefits | | | Standard Equipment | | | Optional Equipment | | | Work Tools & Attachments | ||
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 | | Power Train The Cat® C27 ACERT™ engine is U.S. EPA Tier 3/EU Stage IIIa compliant and combined with MEUI, ADEM™ IV, axle-shaft brakes and impeller clutch torque converter with lock-up clutch provides smooth consistent shifting with rimpull control and direct drive efficiency. |
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| Cat C27 Engine with ACERTTM Technology | ||
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| Starting System | ||
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| 1 Aftercooler | ||
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| 2 High Injection Pressures | ||
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| 3 Oil-Cooled Pistons and Full-Length, Water-Cooled Cylinder Liners | ||
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| 4 Engine Oil Cooler | ||
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| Impeller Clutch Torque Converter (ICTC) | ||
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| ICTC Benefits | ||
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 | | 5 Impeller Clutch |
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| 6 Lockup Clutch | ||
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 | | Planetary, Electronic, Power Shift Transmission |
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| Parking Brake | ||
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| 7 Final Drives | ||
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 | | 8 Axle-Shaft, Oil-Disc Brakes |
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| Design | ||
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| 9 Brake Location | ||
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| Bevel Gear Sets and Differentials | ||
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| Service Brakes | ||
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| Secondary Brakes | ||
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| Cooling System The Next Generation Modular Radiator with Air-to-Air Aftercooling System has been added to the 844H to help meet emissions requirements and improve efficiency, serviceability and sound levels. | ||
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 | | Next Generation Modular Radiator (NGMR) |
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 | | ATAAC System |
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| Separated Cooling System | ||
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| Serviceability | ||
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| Two-Pass System | ||
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 | | Structures The 844H features a box-section rear frame and four-plate front frame providing strength and stability. Together they provide resistance to dozing shocks and stresses while absorbing shock loads and twisting forces. |
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| Structure Welds | ||
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| Castings | ||
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| 1 Box-Section Rear Frame | ||
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| 2 Four-Plate Front Frame | ||
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| 3 Upper and Lower Hitch Pins | ||
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| 4 Spread-Hitch Design | ||
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| Engine and Transmission Mounts | ||
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 | | Hydraulics Two, independent hydraulic systems and load-sensing steering are the invisible force behind the mobility and versatility of the 844H. |
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| 1 Two Separate Hydraulic Systems | ||
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| 2 Blade Control | ||
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| 3 Load Sensing Steering with STIC™ Control System | ||
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| XT™-3 and XT™-5 Hose | ||
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| Hydrostatic Demand Fan | ||
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 | | Blades and Blade Controls Choose between semi-U, heavy-duty semi-U and coal blades. Replaceable bolt-on cutting edges and bottom wear plates help extend blade life. A new ergonomic, pilot controlled joystick is used to hydraulically control all blade operations. |
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| Cat Blades | ||
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 | | Coal Blade |
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 | | Semi-U Blade |
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| Heavy-Duty Semi-U Blade | ||
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| Coal Scoop | ||
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| Heavy-Duty Blade Linkage | ||
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| Low Effort, Pilot Operated, Joystick Blade Control | ||
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| Lift Circuit | ||
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| Tilt/Tip Circuit | ||
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 | | Operator Station Experience high level efficiency, productivity and comfort with the state-of-the-art cab featuring one-hand STIC™ operation, excellent ventilation, low sound levels, large viewing area and a new blade control and trainer’s seat. |
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| Cab Design | ||
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| 1 Steering Transmission Integrated Controller (STIC) Control System | ||
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| 2 Left Pedal | ||
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| 3 Comfort Series Seat | ||
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 | | 4 Trainer's Seat |
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| Quick-Shift Feature | ||
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| Throttle Lock | ||
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| 5 Electronic Monitoring System III | ||
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| 6 Floor-Mounted Hydraulic Pilot Blade Controls | ||
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| Torque Converter Lock-up Clutch | ||
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| Large Viewing Area | ||
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| Serviceability Large engine doors, rear access stairs and convenient service platform with large doors enhance serviceability on the 844H. Hydraulic, transmission and radiator sight gauges make daily checks quick and easy. | ||
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| Easy Maintenance | ||
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| • Rear Access Stairs | ||
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| • Large Engine Access Doors | ||
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| • Large Service Platform | ||
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| • Large Door | ||
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| • Large Platform Door | ||
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 | | • Batteries |
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| • Side Access Doors | ||
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| • Grouped and Labeled Lube Points | ||
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 | | • Sight Gauges |
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 | | • Fuses |
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 | | Complete Customer Support The Caterpillar dealer network provides world class customer support and offers a wide range of services that help you operate longer with lower costs. |
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| Machine Selection | ||
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| Purchase | ||
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| Customer Support Agreements | ||
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| Product Support | ||
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| Operation | ||
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| Maintenance Services | ||
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| Replacement | ||