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844H Wheel Dozer

Product catalog summary

Engine Specifications
The Caterpillar 844H Wheel Dozer is powered by the Cat® C27 ACERT™ engine, delivering a gross power of 512 kW (687 hp) and a net power of 468 kW (627 hp). It complies with U.S. EPA Tier 3/EU Stage IIIa standards, featuring advanced electronic controls for enhanced efficiency and reliability.

Operating Specifications
The dozer is designed for demanding applications, with blade capacities ranging from 15.9 to 30.7 m3 (20.7 to 40.2 yd3) and an operating weight of 70,815 kg (156,120 lb).

Power Train
It includes a planetary, electronic, power shift transmission similar to the Cat 990H Wheel Loader, ensuring smooth shifts. The Impeller Clutch Torque Converter (ICTC) allows modulation of rimpull and includes a lockup clutch for direct drive efficiency.

Cooling System
The Next Generation Modular Radiator (NGMR) with Air-to-Air Aftercooling System enhances cooling efficiency by 22% and meets emissions requirements, featuring a two-pass system for improved cooling capacity and serviceability.

Structures
The 844H features a robust box-section rear frame and a four-plate front frame for strength and stability, with over 90% of welds robotically performed for consistency and durability.

Hydraulics
The machine uses two independent hydraulic systems for lift/tilt/tip and steering, enhancing cooling and preventing cross-contamination. The Load Sensing Steering with STIC™ Control System integrates steering and transmission for efficient power use.

Blades and Blade Controls
Available blade options include semi-U, heavy-duty semi-U, and coal blades, all designed for durability and efficiency. The ergonomic pilot-controlled joystick allows precise hydraulic control of blade operations.

Operator Station
The operator station is designed for comfort and productivity, featuring a spacious cab with low sound levels, excellent ventilation, and a state-of-the-art control system.

Control Systems
The 844H features the STIC™ Control System, integrating steering and transmission into a single controller for ease of operation. The left pedal operates the Impeller Clutch Torque Converter and brakes, while the Quick-Shift feature allows faster cycle times. The Electronic Monitoring System III provides real-time monitoring and alerts for various machine systems.

Comfort and Ergonomics
The machine is equipped with a Comfort Series Seat with air suspension and a retractable seat belt, designed to reduce operator fatigue. A trainer's seat is also included. The cab features a large viewing area for enhanced visibility and is equipped with sound suppression and climate control systems.

Maintenance and Serviceability
The 844H is designed for easy maintenance with features like rear access stairs, large engine access doors, and grouped lube points. The machine's design minimizes downtime and includes options for customer support agreements and maintenance services from Cat dealers.

Technical Specifications
The document details the machine's weights, transmission speeds, hydraulic system outputs, engine specifications, and operating capacities. The 844H is powered by a Cat C27 ACERT™ engine, offering a gross power of 512 kW (687 hp). It meets various SAE and ISO standards for safety and performance.

Optional Equipment
Various optional features are available, including different blade types, lighting systems, and additional sound suppression. The document advises consulting with a Cat dealer for specific configurations and options.

844H Wheel Dozer

844H Wheel Dozer

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