Filtre grossier à carburant FAW: Un guide complet de son 9 Éléments essentiels

Bienvenue dans ce guide technique complet sur le Filtre grossier à carburant FAW (Partie no. 1105010-2007-C00), the engine’s critical first line of defense for the FAW Jiefang CA4251P66K24T1A3E5 6×4 tracteur semi-remorque diesel.

Le Filtre grossier à carburant FAW is a dual-function assembly, often called a fuel/water separator. Its primary job is to remove large contaminants (saleté, rust, algae) from the fuel tank, a process known as “grossier” filtration. C'est la deuxième, and arguably more critical, function is to separate and remove all free and emulsified water from the fuel.

Ce guide est une ressource essentielle pour les techniciens professionnels et les spécialistes des pièces.. Nous déconstruirons l'ensemble Filtre grossier à carburant FAW assemblée, including its main housing, the replaceable filter element, the integrated water-in-fuel sensor, and all mounting hardware, down to the smallest serviceable unit.

Composant principal: The Filter Assembly (1105010-2007-C00)

The main component, Marque 1, is the ‘Fuel Filter Assembly’ (1105010-2007-C00). C'est le complet Filtre grossier à carburant FAW unité. It is comprised of three main sub-assemblies that work together.

**1. Main Housing (1105020-2007):** The ‘Fuel Filter Main Housing Assembly’ is the permanent “tête” du système. This is a precision-cast aluminum component that mounts to the chassis via brackets. It contains the fuel inlet and outlet ports, le support fileté pour l'élément filtrant, and the internal passages for the fuel. L'ensemble Filtre grossier à carburant FAW system is built upon this housing.

**2. Filter Element (1105050-2007):** The ‘Fuel Filter Element Assembly’ is the serviceable “cartouche.” This is the part that is replaced during maintenance. This spin-on canister contains the “grossier” filter media, which is a high-flow, high-capacity media designed to trap large particles (Par exemple, 30-100 microns). Its job is to protect the *next* filter in the system (le “filtre fin”) from being overwhelmed by large contaminants like rust flakes or algae, thus extending its life. This element is the “workhorse” de la Filtre grossier à carburant FAW.

The Critical Logic: Séparation de l'eau (Coalescence)

The most important function of the Filtre grossier à carburant FAW is not just filtration, but water separation. Diesel fuel is easily contaminated with water, which is catastrophic for a high-pressure common rail (Hpcr) système d'injection. Water causes rust and corrosion in the injectors and can flash-boil from the pressure, destroying the injector tips.

The media inside the Filtre grossier à carburant FAW élément (1105050-2007) est “hydrophobe.” This means it repels water. As fuel flows through the media, the microscopic, emulsified water droplets are forced to “se fondre”—they merge into larger, gouttelettes plus lourdes.

These heavy water droplets, which are denser than diesel fuel, fall out of the fuel flow and collect in a “puisard” ou “bowl” at the bottom of the Filtre grossier à carburant FAW canister. This collected water can then be drained by the operator. This water separation logic is the primary purpose of the Filtre grossier à carburant FAW, acting as the gatekeeper for the entire fuel system. A failure in this coalescing function will lead to the rapid and extremely expensive failure of the HPCR pump and all six injectors.

The Warning System: Water Level Sensor (1105150C50A)

The third sub-assembly of the Filtre grossier à carburant FAW is the ‘Water Level Sensor Assembly’ (1105150C50A). C'est l'électronique “watchdog” for the system. It is a sensor, ou “probe,” that threads into the bottom of the filter bowl where the water collects.

This sensor typically has two small metal electrodes. As water fills the bowl, it eventually rises to the level of these probes. Since water is conductive (while diesel fuel is not), it completes an electrical circuit between the two probes. This sends a signal to the ECU, which then illuminates the “Water in Fuel” warning light on the dashboard.

This signal is a non-negotiable service warning. It tells the driver or technician to *immediately* stop and drain the water from the Filtre grossier à carburant FAW bowl (usually via a small petcock at the bottom). If this warning is ignored, the bowl will fill completely, et le Filtre grossier à carburant FAW will lose its ability to separate water. From that point on, all incoming water will be pulled directly into the engine, leading to catastrophic damage. The proper function of this sensor is therefore critical to the Filtre grossier à carburant FAWc'est la logique.

Le système de montage: Brackets and Hardware

L'ensemble Filtre grossier à carburant FAW assembly is a heavy component, especially when full of fuel. It must be rigidly mounted to the truck’s chassis frame rail to protect it from the engine’s vibration. This is the job of the two ‘Fuel Coarse Filter Bracket’ (1105121-2007) unités.

These two brackets form a secure “étagère” ou “cage” that bolts to the chassis. The ‘Fuel Filter Main Housing Assembly’ (1105020-2007) is then mounted to these brackets. The hardware listed is specifically for this dual-mounting purpose.

**Support au châssis:** The two ‘Hex head bolts’ (CQ1501445), two ‘Spring gaskets’ (Q40314), and four ‘Hex nuts’ (CQ34012) sont utilisés. This suggests the bolts pass through the bracket, then the chassis rail, and are secured on the opposite side with a spring washer (to prevent loosening) and two nuts (the second acting as a “jam nut” to lock the first). C'est un véhicule robuste, vibration-proof mounting method for the Filtre grossier à carburant FAW supports.

**Housing-to-Bracket:** The two ‘Combination Bolt’ (CQ1421245) and two ‘Combination Bolt’ (CQ1461250) units are then used to secure the Filtre grossier à carburant FAW housing to the brackets. “Boulons combinés” have pre-installed, captive spring washers, making them ideal for high-vibration areas where dropping a washer is not an option. This robust hardware system ensures the Filtre grossier à carburant FAW remains stable.

FAW Fuel Coarse Filter Parts List

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 7 primary components and sub-assemblies for the Filtre grossier à carburant FAW diagramme, comme spécifié pour le tracteur FAW CA4251P66K24T1A3E5. Entretien du Filtre grossier à carburant FAW (1105050-2007) est une critique, regular maintenance task.

Spécifications techniques et contexte d'assemblage

Les spécifications pour le Filtre grossier à carburant FAW are defined by its dual function as a particle filter and water separator. L'ensemble Filtre grossier à carburant FAW system is the first line of defense for the fuel system.