Ensemble de réservoir d'air auxiliaire FAW: Une analyse critique de 10 Composants de base

Bienvenue dans cette analyse technique critique du Ensemble de réservoir d'air auxiliaire FAW (Assemblée 543). This is a complete, monté sur châssis, high-pressure air reservoir system for the FAW Jiefang CA4251P66K24T1A3E5 6×4 tracteur semi-remorque diesel. This assembly serves as a vital “auxiliaire” storage unit for the truck’s complex pneumatic brake and suspension systems.

Le Ensemble de réservoir d'air auxiliaire FAW est un “logique” system designed to provide redundant or specialized air capacity. While the main air brake module (Assemblée 542) provides primary storage, this ‘Dual-chamber air storage tank assembly’ (3513075-91W) offers dedicated air volume for systems like the trailer brakes, parking brakes, or the pneumatic-over-hydraulic clutch, ensuring system integrity.

This in-depth guide is an essential resource for professional chassis technicians and parts specialists. Nous déconstruirons l'ensemble Ensemble de réservoir d'air auxiliaire FAW dans son 10 types de composants réparables, including the dual-chamber tank, the ‘Drain valve assembly’, the ‘Tank strap assembly’, the chassis-mounted ‘Bracket assembly’, and all the critical high-pressure fittings and fasteners.

Composant principal: ‘Dual-Chamber Air Storage Tank’ (3513075-91W)

Le coeur du Ensemble de réservoir d'air auxiliaire FAW is the ‘Dual-chamber air storage tank assembly’ (3513075-91W). This is a heavy-duty, steel-walled cylinder, but its “dual-chamber” nature is its key “logique.” This is not just one open tank; it has an internal, welded baffle that divides it into two separate, airtight reservoirs.

Ce “dual-chamber” logic is a critical safety feature of the Ensemble de réservoir d'air auxiliaire FAW. It allows this single component to serve two different, isolated brake circuits. Par exemple, one chamber might be dedicated to the trailer’s service brakes, while the other chamber is dedicated to the truck’s spring (parking) freins.

This ensures that a catastrophic failure in one circuit (like a severed trailer air line) cannot drain the air from the *other* circuit. This redundancy is the core “logique” of a safe, modern air brake system. Le Ensemble de réservoir d'air auxiliaire FAW is a key part of this redundant design. These tanks are designed to hold air at 120-130 PSI and must be free from external damage or internal rust, which could lead to a catastrophic rupture.

Le système de montage: Support (3513075-75UN) & Straps (3513085-91W)

A heavy, air-filled tank must be securely mounted to the chassis. Le Ensemble de réservoir d'air auxiliaire FAW uses a robust, two-part system.

**1. ‘Bracket assembly-auxiliary air tank’ (3513075-75UN):** C'est le principal “shelf” ou “cradle.” C'est un véhicule robuste, fabricated steel bracket that bolts directly to the truck’s main C-channel frame rail. This bracket provides the rigid, structural support for the tank. This component of the Ensemble de réservoir d'air auxiliaire FAW is secured to the chassis using ‘Hex flange bolts’ (Q1841440, Q1841475) et « Écrous de blocage à bride à tête hexagonale’ (CQ32614), ensuring a vibration-proof connection.

**2. ‘Tank strap assembly-auxiliary air tank’ (3513085-91W):** La liste des pièces en appelle deux. These are high-tensile steel bands that “strap” the cylindrical tank down into its cradle bracket. These straps are what prevent the tank from shifting or falling off. They are designed to be tensioned with bolts to provide a high-clamping force. This bracket-and-strap “logique” is the standard for safely mounting cylindrical air tanks, and it is a key part of the Ensemble de réservoir d'air auxiliaire FAW.

Service “Logique”: Drain Valve (3513100-1500) and Test Port (T833)

Le “logique” de la Ensemble de réservoir d'air auxiliaire FAW is designed around regular maintenance. The ‘Drain valve assembly’ (3513100-1500) is the most important serviceable component. The list calls for two (one for each chamber of the dual-chamber tank).

Air from the engine’s compressor is hot and contains moisture. As this air cools in the tank, the moisture condenses into liquid water. This water is corrosive and dangerous; it can rust the steel tank from the inside out, and in cold weather, it can freeze, blocking the air lines and causing complete brake failure.

Le “logique” of these drain valves is to provide a simple, manual way (usually a pull-cable or a petcock) for the driver to “vidange” this accumulated water from the tanks at the end of every day. This daily purge is the single most important PM task for the Ensemble de réservoir d'air auxiliaire FAW.

Le connecteur de test à connexion rapide’ (T833) est un diagnostic “logique” port. It is a one-way, spring-loaded valve that allows a technician to quickly connect a pressure gauge to the Ensemble de réservoir d'air auxiliaire FAW to test the system pressure, without having to disconnect a main (and dangerous) high-pressure line.

Fittings and Plumbing: The Grommet System

Le Ensemble de réservoir d'air auxiliaire FAW must connect to the rest of the truck’s air system. This is done with a series of high-pressure, “pousser pour se connecter” style fittings. Ce sont les “œillets” and their associated seals.

This parts list includes:

• **M22 Fittings:** Four ‘Grommet (M22) avec bague d'étanchéité’ (3513410-1500). These are the large ports, likely for the main supply *in* and the main service brake supply *out*.
• **M16 Fittings:** One ‘Grommet (M16) avec bague d'étanchéité’ (3506410-1500). This is a smaller port, perhaps for a sensor or the parking brake line.
• **Prise:** One ‘Plug chamber (M16) avec bague d'étanchéité’ (3506415-1500), used to seal an unused M16 port.

Le “logique” of these fittings is that they are sealed by ‘Special-shaped sealing rings’ (3513403-1500 for M22, 3506403-1500 for M16) and physically locked in place by ‘Circlips’ (3513407-1500 for Φ12, 3506407-1500 for Φ10). A failure of one of these small o-rings or circlips will cause a persistent, hard-to-find air leak, which is a major fault in any Ensemble de réservoir d'air auxiliaire FAW.

FAW Auxiliary Air Tank Assembly Parts List

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 10 component groups (totaling 29 pièces) identified in the ‘Auxiliary Air Tank Assembly’ (543) schéma du tracteur FAW CA4251P66K24T1A3E5.

Spécifications techniques et contexte d'assemblage

Les spécifications pour le Ensemble de réservoir d'air auxiliaire FAW are defined by its function as a high-pressure, dual-circuit air reservoir. Le Ensemble de réservoir d'air auxiliaire FAW is a critical safety component of the pneumatic brake system.