CAT C9.3B Engine Assembly AR5477363 547-7363

The CAT C9.3B Engine Assembly (Part No. AR5477363 / 547-7363) is a high-performance, emissions-compliant diesel engine assembly tailored for heavy-duty off-highway applications, known for its durability and fuel efficiency. ### 1. Basic Information - **Manufacturer**: Caterpillar Inc. (CAT), a global leader in construction and mining equipment engines. - **Part Identification**: Two interchangeable part numbers—**AR5477363** (full assembly code) and **547-7363** (simplified code) — ensuring compatibility with specific CAT equipment models. - **Engine Type**: 4-stroke, inline 6-cylinder turbocharged diesel engine assembly (includes core engine, turbocharger, fuel system, and critical auxiliary components). - **Displacement**: 9.3 liters (568 cubic inches), balancing power output and compact size for equipment installation flexibility. ### 2. Core Technical Features - **Turbocharging with Aftercooling**: Equipped with a high-efficiency turbocharger and air-to-air aftercooler. This combination increases intake air density, optimizes fuel combustion, and enhances low-speed torque—critical for heavy-load operations like digging or hauling. - **Advanced Fuel Injection System**: Uses CAT’s electronically controlled common-rail fuel injection. It precisely regulates fuel pressure and injection timing in real time, reducing fuel consumption by up to 5% compared to previous generations while minimizing noise and emissions. - **Emission Compliance**: Meets global off-highway emission standards, including **EU Stage V**, **U.S. EPA Tier 4 Final**, and **China Non-road National IV**. It achieves this via a integrated aftertreatment system (DOC + DPF + SCR) that reduces NOx and particulate matter (PM) emissions. - **Durability Design**: Features a robust cast-iron cylinder block and forged steel crankshaft. Key components (e.g., pistons, valves) are coated with wear-resistant materials, extending the engine’s service life to over 12,000 operating hours under typical conditions. ### 3. Performance Specifications | Parameter               | Value                  | |-------------------------|------------------------| | Rated Power             | Up to 340 hp (254 kW)  | | Peak Torque             | Up to 1,400 N·m        | | Rated Speed             | 1,800 – 2,200 rpm      | | Fuel Consumption (Typ.) | ~200 g/kWh (at rated load) | | Operating Temperature Range | -30°C to 55°C      | ### 4. Typical Applications This engine assembly is factory-calibrated for specific CAT equipment, including: - Heavy-duty construction machinery: Excavators (e.g., CAT 336), wheel loaders (e.g., CAT 966M). - Mining support equipment: Small to medium-sized haul trucks, graders (e.g., CAT 140M3). - Agricultural machinery: Large tractors, combine harvesters (high-power variants). - Industrial equipment: Stationary generators, marine auxiliary power units (APUs).