Уплотнение передней переборки и водонепроницаемая мембрана FAW: 5 Важные секреты для молчаливых, Сухая кабина

Welcome to this critical technical analysis of the Уплотнение передней переборки и водонепроницаемая мембрана FAW сборка. Это полный, 21-piece, multi-component “sealing and damping” kit for the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This is not an optional trim kit; it is a critical engineering system with a “triple-threat” логика: 1) to block noise, 2) to seal against water/fumes, и 3) to prevent panel vibration.

The Уплотнение передней переборки и водонепроницаемая мембрана FAW kit is a foundational component of the cab’s “тело в белом” (BIW) integrity. The “логика” of this assembly is to permanently seal the numerous access and drainage holes created during the cab’s manufacturing process (for robotic grippers, alignment pins, and e-coating drainage). This kit includes precision-molded EPDM rubber plugs, adhesive waterproof membranes, and dense rubber damping blocks.

This in-depth guide is an essential resource for cab technicians, collision repair specialists, и менеджеры по запчастям. Мы разберем всю Уплотнение передней переборки и водонепроницаемая мембрана FAW kit into its 5 отдельная минимальная обслуживаемая единица (МГУ) типы. Мы проанализируем “Grommet Logic” of the plugs, а “Water Curtain Logic” of the membranes, и “NVH-логика” of the rubber blocks. Этот “уплотнение” logic is a foundational principle of modern vehicle manufacturing. It is the base upon which all other comfort and safety systems, like the ‘Soundproofing Pad’ (623) and ‘Floor Underlay’ (624), are built. A failure in this primary sealing kit compromises all subsequent layers.

Основной 1: The “Логика уплотнения” – Plugs & Grommets (МГУ 1, 2, 3)

This group of MSUs from the Уплотнение передней переборки и водонепроницаемая мембрана FAW kit is the primary “уплотнение” система. It consists of 8 total plugs of three distinct types, designed to seal holes in both the floor pan and the front bulkhead (firewall).

The “Логика” of Plugs: A cab’s sheet metal “тело в белом” is intentionally perforated with holes. Это “логика” holes, used by factory robots for alignment, by grippers for lifting, and by the E-coating (electro-dip rust-proofing) process to allow liquid primer to drain out. This MSU kit’s “логика” is to permanently seal these holes.

This provides three critical functions:

• Water/Rust Barrier: Stops road spray and salt from getting *under* the cab flooring, что такое #1 cause of floor pan rust.
• Fume Barrier: A critical safety “логика” that prevents engine bay fumes (like CO) from entering the driver’s breathing space.
• NVH Barrier: Blocks the direct path of engine, transmission, and road noise, making the cab quieter.

МГУ 1: ‘Round plug A-floor’ (5109616-А01) – Кол-во 2

These two plugs are for the *floor pan*. Их “логика” is to seal the round holes, likely used for alignment or drainage, in the horizontal surface of the cab floor.

МГУ 2 & 3: ‘Oblong plug A-front panel’ (5302806-А01) & ‘Oblong plug B-front panel’ (5302807-А01) – Кол-во 6 общий

These six oblong (rectangular) plugs are for the “передняя панель” (the firewall). Их “логика” is to seal the larger, non-circular holes used for robotic access during the welding and assembly of the FAW Welded Cab Assembly (Сборка 617). The “А” и “Б” designations mean they are two different, non-interchangeable sizes.

All these plugs are made from high-grade EPDM rubber, designed with a “groove” that “щелкает” into the sheet metal for a permanent, виброустойчивый, watertight seal.

Основной 2: The “Water Curtain” Логика (МГУ 4)

Этот компонент, the ‘Waterproof membrane-front panel’ (5302821-А01), is a completely different “логика” from the plugs. The parts list calls for five (5) of these MSUs.

What is this “Логика”? А “waterproof membrane” is not a plug; это “water curtain” или “vapor barrier.” This is a thin, tough sheet of adhesive-backed polyethylene or similar plastic.

Его “логика” is to seal the large access holes on the *inner* side of the ‘Front Panel’—specifically, the **doors**. A truck door is *designed* to get wet inside. Rainwater that runs down the outside of the ‘Side Window’ (Сборка 634) gets past the seal and drains *down inside the door shell*, exiting through drain holes at the bottom.

Этот Уплотнение передней переборки и водонепроницаемая мембрана FAW это “логика” that stops that water. It is applied to the door’s inner metal shell *before* the interior trim panel is installed. It covers the large service holes, creating a “curtain” that directs the water *down* to the drain holes, and prevents it from soaking into the ‘Door Trim Panel’ (Сборка 641).

Удобство обслуживания (МГУ): This is a critical MSU. If a technician performing a ‘Window Lifter’ (Сборка 636) repair carelessly rips this membrane, the door *will* leak water into the cab. A torn membrane is a common, costly mistake. It allows water to bypass the door drains and wick directly into the ‘Door Trim Panel’ (Сборка 641), causing it to swell, warp, and delaminate. This makes the 5302821-A01 a critical, must-replace MSU during any internal door service to ensure a professional, long-lasting repair. The five pieces likely correspond to the two doors (НАПРИМЕР., a large main membrane and a smaller speaker membrane for each) and one for another firewall access panel.

Основной 3: The “Анти-погремушка” Логика демпфирования (МГУ 5)

The final MSU in the Уплотнение передней переборки и водонепроницаемая мембрана FAW kit is the ‘Rubber block-middle fixing bracket’ (5310336-240). The parts list calls for eight (8) of these.

NVH-логика: This component’s “логика” is not sealing; it is **damping**. These are not soft, hollow gaskets; they are dense, solid blocks of EPDM rubber. Они есть “bump stops” или “buffers” used for Noise, Вибрация, и жесткость (ШВХ) контроль.

These eight blocks are strategically placed on the cab’s bulkhead or firewall, specifically where the “middle fixing bracket” of the main dashboard assembly is mounted.

Их “логика” is to provide a pre-loaded, high-friction contact point. Они создают “буфер” between the hard plastic of the dashboard and the hard metal of the cab. Этот “dashboard squeak” is a high-frequency, grating noise that is a top driver complaint. Эти 8 blocks prevent the two surfaces from ever touching, eliminating this source of noise. Этот “anti-rattle” logic is essential for driver comfort and contributes significantly to a less fatiguing, more premium-feeling cab environment.

FAW Front Bulkhead Seal And Waterproof Membrane Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 5 типы компонентов, указанные в Уплотнение передней переборки и водонепроницаемая мембрана FAW в сборе для трактора FAW CA4251P66K24T1A3E5.

Технические характеристики

Технические характеристики Уплотнение передней переборки и водонепроницаемая мембрана FAW kit are defined by its function as a multi-type, multi-material sealing and damping solution for the cab body.