FAW Fuel Oil Heater Logic Assembly: A Comprehensive Breakdown of 17 Ключевые компоненты

Добро пожаловать в это подробное техническое руководство по FAW Fuel Oil Heater Logic Assembly (Часть №. 1312010-74Т), a critical system for all-weather reliability on the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This assembly is the engine’s primary defense against cold-weather fuel gelling.

The FAW Fuel Oil Heater Logic Assembly is a sophisticated heat-exchanger system. Его “логика” is to use hot engine coolant to heat the diesel fuel *before* it reaches the filters. This action prevents the paraffin wax in cold diesel from crystallizing (“gelling”), which would clog the fuel filters and starve the engine of fuel.

Это руководство является важным ресурсом для профессиональных технических специалистов и специалистов по запчастям.. Мы разберем всю FAW Fuel Oil Heater Logic Assembly в свой 17 исправные компоненты, including the main heater, the auxiliary electromagnetic pump, all coolant and fuel plumbing, and the mounting brackets.

Основной компонент: The Fuel Heater Assembly (1312010-74Т)

Сердце FAW Fuel Oil Heater Logic Assembly is the ‘Fuel Heater Assembly’ (1312010-74Т). This is the main heat exchanger. Это “liquid-to-liquid” cooler, operating in reverse: it uses hot liquid (охлаждающая жидкость) to heat a cold liquid (топливо).

This unit is typically a “plate-style” или “shell-and-tube” exchanger. Hot engine coolant is forced through one set of internal passages, while cold diesel fuel from the tank is forced through a separate, alternating set of passages. The two fluids never touch, but the heat from the 80-90°C coolant is efficiently transferred through the thin metal plates to the sub-zero fuel.

This action raises the fuel temperature well above its “cloud point,” ensuring the paraffin wax stays in a liquid state. A failure of this FAW Fuel Oil Heater Logic Assembly core (НАПРИМЕР., an internal leak) is catastrophic. It can force high-pressure coolant into the fuel system, contaminating the injectors, or force diesel fuel into the cooling system, destroying all rubber hoses and seals. This makes the integrity of the FAW Fuel Oil Heater Logic Assembly paramount.

The Coolant “Piping” Circuit (1312035-74Т)

The FAW Fuel Oil Heater Logic Assembly cannot create heat; it can only transfer it. The “трубопровод” components are responsible for tapping into the engine’s main cooling system to acquire this heat. This circuit includes:

• ‘Fuel Heater Inlet Water Hose’ (1312038-74Т)
• ‘Fuel Heater Outlet Water Hose’ (1312041-74Т)
• ‘Fuel Heater Inlet/Outlet Steel Pipe Assembly’ (1312035-74Т)
• ‘Return Water Hose’ (1312031-74Т)

This system works by tapping hot coolant from a high-temperature point (like the thermostat housing) and routing it through the ‘Inlet Water Hose’ to the ‘Fuel Heater Assembly’. The ‘Steel Pipe Assembly’ provides a rigid, protected path along the chassis or engine. After the coolant has transferred its heat, the now-cooler fluid is sent back to the low-pressure side of the water pump via the ‘Outlet Water Hose’ and ‘Return Water Hose’. This continuous circulation is the “логика” принадлежащий FAW Fuel Oil Heater Logic Assembly.

These hoses are secured with ‘Worm Drive Hose Clamps’ (CQ67630B). A leak in any of these components will not only disable the FAW Fuel Oil Heater Logic Assembly, but will also cause the engine to lose coolant and overheat.

The “Логика”: Electromagnetic Pump Assembly (1312020-74Т)

The most advanced “логика” component of the FAW Fuel Oil Heater Logic Assembly is the ‘Electromagnetic Pump Assembly – with wire harness’ (1312020-74Т). This is a critical auxiliary pump.

The engine’s main water pump is mechanical and only circulates coolant when the engine is running. This is a problem on a sub-zero “cold start.” The FAW Fuel Oil Heater Logic Assembly needs to heat the fuel *before* the engine starts.

This ‘Electromagnetic Pump’ это решение. When the driver turns the key to the “на” позиция, the ECU activates this 24V electric pump. This pump immediately begins to circulate hot coolant from the (still warm from a block heater, or a Webasto-style heater) engine block, through the ‘Fuel Heater Assembly’, and back to the engine. Этот “pre-heat” cycle runs for 30-60 seconds *before* the starter is engaged, ensuring the fuel in the lines is already warm and de-gelled.

This pump, with its integrated ‘wire harness’, это “мозг” that makes the FAW Fuel Oil Heater Logic Assembly an *active* system, not a passive one. It is likely routed via the ‘Three-way Joint Assembly’ (1312070-29Т), which allows coolant to be sourced from either this pump or the main water pump, depending on whether the engine is on or off. The FAW Fuel Oil Heater Logic Assembly‘s effectiveness depends entirely on this pump.

Кронштейны, Уплотнения, and Fasteners

Весь FAW Fuel Oil Heater Logic Assembly is a heavy, fluid-filled unit that must be protected from vibration. The ‘Fuel Heater Bracket Assembly’ (1312050-74Т) is the main structural support. It bolts to the chassis, and the ‘Fuel Heater Assembly’ then bolts to this bracket.

Additional ‘Bracket’ (3406111-20В) units are used to secure the rigid ‘Steel Pipe Assembly’ (1312035-74Т) and the ‘Electromagnetic Pump’, preventing them from fatiguing and cracking.

The system is sealed with the ‘Gasket ring’ (CQ72327) and ‘Joint’ (1312036-74Т), which are single-use crush washers for the fluid connections. Весь FAW Fuel Oil Heater Logic Assembly is fastened with a variety of high-grade hardware: «Болты с шестигранной головкой’ (Q1841435, Q1840820) and ‘Hex flange nuts’ (CQ39614, CQ39608). The ‘Plastic Zip Ties’ (Т67420376) are used to secure the flexible hoses and wiring harness away from any hot or moving parts, completing the installation of the FAW Fuel Oil Heater Logic Assembly.

FAW Fuel Oil Heater Logic Assembly Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 17 components identified in the ‘Fuel Oil Heater Logic Assembly’ схема трактора FAW CA4251P66K24T1A3E5. Этот FAW Fuel Oil Heater Logic Assembly is essential for cold-weather starting.

Технические характеристики и контекст сборки

Технические характеристики FAW Fuel Oil Heater Logic Assembly are defined by its function as an active, coolant-based heat exchanger. Весь этот FAW Fuel Oil Heater Logic Assembly is a key system for cold-weather operation.