Расширительный бак ФАВ, Трубопроводы, Кронштейны: Экспертный анализ 21 Ключевые компоненты

Welcome to this expert technical analysis of the Расширительный бак ФАВ, Трубопроводы, Кронштейны система для FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This assembly is the critical “overflow” и “deaeration” system for the engine’s high-pressure cooling circuit.

The Расширительный бак ФАВ, Трубопроводы, Кронштейны assembly is a multi-part system that performs three vital functions: it provides a reservoir for coolant to expand into as it heats up, it traps and purges all air bubbles from the system (deaeration), and it serves as the high point for filling and checking the coolant level.

Это подробное руководство является важным ресурсом для профессиональных технических специалистов., менеджеры автопарка, и специалисты по запчастям. Мы разберем всю Расширительный бак ФАВ, Трубопроводы, Кронштейны систему в свою 21 исправные компоненты, including the ‘Expansion Tank Assembly’ (1311020-76А), its ‘Pressure Cap’ (1304010-50А), all connecting hoses, and the critical vibration-damping brackets.

Основной компонент: The Expansion Tank (1311020-76А)

Ядро Расширительный бак ФАВ, Трубопроводы, Кронштейны system is the ‘Expansion Tank Assembly’ (1311020-76А). This is the high-point reservoir of the cooling system. Это надежный, translucent polymer (пластик) tank, allowing a technician to visually inspect the coolant level without opening the system.

This tank’s primary function is to manage thermal expansion. As the engine’s coolant heats up from 20°C to 95°C, it can expand in volume by 3-5%. The Расширительный бак ФАВ, Трубопроводы, Кронштейны system provides the “air head” or empty space for this expanded coolant to move into. Без этого, the expanding fluid would create immense pressure and rupture the radiator or hoses.

Во-вторых, this tank is the “deaeration” центр. It is designed to be the highest point in the cooling circuit. Small “deaeration” lines from the radiator (1311061А377) and engine head (1311068-61Б) feed into this tank. Any air bubbles or steam pockets from the engine are “bled” into this tank, where they are trapped. This ensures the engine block and water pump are always filled with 100% liquid coolant, предотвращение “горячие точки” that can crack a cylinder head. This deaeration logic is a key function of the Расширительный бак ФАВ, Трубопроводы, Кронштейны система.

The Pressure Cap Assembly (1304010-50А)

The ‘Pressure Cap Assembly’ (1304010-50А) is the most critical “логика” component in the entire Расширительный бак ФАВ, Трубопроводы, Кронштейны система. It is not just a lid; это сложный, spring-loaded, two-way valve.

**1. Pressure Valve (Raises Boiling Point):** The main function of this cap is to pressurize the entire cooling system (НАПРИМЕР., к 1.1 бар / 16 пси). For every 1 PSI of pressure, the boiling point of water is raised by approximately 1.7°C (3° F.). This 16-PSI cap raises the coolant’s boiling point from 100°C (212° F.) to over 126°C (257° F.). This is *essential* for a heavy-duty diesel engine, as it prevents the coolant from boiling (“cavitation”) around the hot cylinder liners, which would lead to immediate, catastrophic overheating. The large spring inside the cap holds this pressure.

**2. Vacuum Valve (Prevents Hose Collapse):** Когда двигатель выключен, the coolant (now at 95°C) begins to cool. As it cools, it contracts, creating a powerful *vacuum* inside the cooling system. This vacuum is strong enough to collapse the large, soft radiator hoses (like 1303021-74A). Чтобы предотвратить это, маленький, обеспечить регресс, “vacuum” valve in the center of the cap is pulled *open* by this vacuum, allowing air to be drawn *into* the Расширительный бак ФАВ, Трубопроводы, Кронштейны assembly to equalize the pressure.

A faulty pressure cap is a very common and misdiagnosed cause of overheating. If its spring is weak, the system will not pressurize, and the engine will boil over at normal operating temperature. The Расширительный бак ФАВ, Трубопроводы, Кронштейны system is entirely dependent on this one part.

The “Трубопроводы”: Hoses and Steel Tubes

The “Трубопроводы” компоненты Расширительный бак ФАВ, Трубопроводы, Кронштейны are a network of hoses and pipes for returning and deaerating coolant.

**Deaeration (Air Bleed) Lines:** These are the small hoses that “истекать кровью” air from the system. The ‘Deaeration hose’ (1311068-61Б) and ‘Rear deaeration hose’ (1311069-61Б) run from the high points of the engine (like the thermostat housing) to the top of the ‘Expansion Tank Assembly’. The ‘Radiator front deaeration hose’ (1311061А377) runs from the top of the radiator to the tank. These pipes ensure all trapped air is purged.

**Return Water Circuit:** This is the circuit that returns coolant from the vehicle’s “heater core” (which provides heat to the cab) and the fuel heater. This circuit is comprised of the ‘Return water hose’ (1311033-61Б), ‘Front return water hose’ (1311038-61С), ‘Connecting pipe assembly’ (1311025-61С), and the ‘Steel return water pipe assembly’ (1311065-91Вт). This combination of flexible rubber hoses (to absorb engine vibration) and rigid steel pipes (for long, protected runs) is a key part of the Расширительный бак ФАВ, Трубопроводы, Кронштейны system’s durability.

This entire network of “pipework” is held together with numerous ‘Worm Drive Hose Clamps’ (CQ67622B, CQ67640B) and ‘Plastic zip ties’ (Т67420376) to ensure a leak-free, vibration-resistant setup for the Расширительный бак ФАВ, Трубопроводы, Кронштейны.

The “Скобка” Система: Isolating the Tank and Pipes

The “Скобка” компоненты Расширительный бак ФАВ, Трубопроводы, Кронштейны are essential for protecting the system from vibration. The ‘Expansion Tank Bracket Assembly’ (1311040-61С) является основным “полка” that bolts to the cab or chassis, holding the heavy, fluid-filled ‘Expansion Tank Assembly’.

The extensive piping is also rigidly supported. The ‘Front support bracket for return steel pipe’ (1311070-91Вт), ‘Rear support bracket for return steel pipe’ (1311075-91Вт), and ‘Deaeration pipe support bracket assembly’ (1311080-91Вт) are all used to clamp the long steel and rubber pipes.

This prevents the pipes from chaffing against the engine or frame, which would quickly wear a hole in them. The ‘Bracket’ (1311077-61Б) and ‘Double-pipe clamp assembly’ (1311060-61Б) are used to group and secure multiple hoses, сохранение Расширительный бак ФАВ, Трубопроводы, Кронштейны system tidy and safe from moving parts.

Расширительный бак ФАВ, Трубопроводы, Brackets Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 21 components identified in the ‘Expansion Tank, Трубопроводы, Кронштейны’ схема трактора FAW CA4251P66K24T1A3E5. Этот Расширительный бак ФАВ, Трубопроводы, Кронштейны system is key to engine thermal management.

Технические характеристики и контекст сборки

Технические характеристики Расширительный бак ФАВ, Трубопроводы, Кронштейны system are defined by its function as the cooling system’s reservoir, pressurization, and deaeration hub. The Расширительный бак ФАВ, Трубопроводы, Кронштейны assembly is key to engine thermal management.