Suspension avant FAW: Un accent critique sur 38 Pièces réparables

Bienvenue dans ce guide technique critique sur le Suspension avant FAW (Assemblée 508). C'est le complet, multi-part system responsible for supporting the entire front-end load of the FAW Jiefang CA4251P66K24T1A3E5 6×4 tracteur semi-remorque diesel. This assembly is the critical link between the chassis, the front axle, and the road.

Le Suspension avant FAW est un “logique” system with three primary functions: to bear the massive weight of the engine and cab via the ‘Front leaf spring assembly’ (2902010A50A), to control and dampen suspension movement via the ‘Front shock absorber assembly’ (2905010-1086), and to provide lateral stability and control body roll via the ‘Front lateral stabiliser bar assy’ (2906010-1063).

Ce guide détaillé est une ressource essentielle pour les techniciens professionnels de suspension et les gestionnaires de flotte.. Nous déconstruirons l'ensemble Suspension avant FAW système dans son 38 composants réparables, explaining the function of each interconnected part, from the U-bolts that hold the axle to the brackets that support the shock absorbers and stabilizer bar.

Core Logic 1: The Leaf Spring Assembly (2902010A50A)

Le coeur du Suspension avant FAW est l'ensemble de ressort à lames avant’ (2902010A50A), dont il y en a deux. This is the primary load-bearing component. Ce n'est pas une seule pièce d'acier, mais un “pack” of multiple, stacked “feuilles” made of high-carbon spring steel. This parts list breaks down the pack into its individual components, such as ‘Front leaf spring-first leaf’ (2902011A50A), ‘Ressort à lames avant-deuxième lame’ (2902012A50A), and ‘Front leaf spring-third leaf’ (2902013A50A).

This multi-leaf “logique” is what provides a **progressive spring rate**. Quand le camion est à vide, seulement le haut, les feuilles plus longues fléchissent, fournissant un (relativement) conduite plus douce. As the truck is loaded or hits a large bump, la charge est transférée au plus court, feuilles plus épaisses, augmentant considérablement la rigidité et empêchant la suspension de “toucher le fond.”

This pack is held together by the ‘Center bolt-front leaf spring’ (2902161-40UN) and kept in alignment by ‘Clips’ (2902131-50UN). To prevent metal-on-metal friction and squeaking, the assembly uses eight ‘Damping pad-front leaf spring’ (2902137A50A) unités, which are small polymer pads that allow the leaves to slide smoothly against each other. The ‘Bushing-rear leaf spring’ (2912121-03) and the ‘Front leaf spring first leaf & ensemble de bague’ (2902105A50A) are the rubber/bronze pivot points in the “yeux” of the spring, isolating vibration from the Suspension avant FAW frame.

Core Logic 2: The Damping System (Amortisseurs)

The leaf springs in the Suspension avant FAW are excellent at supporting weight, but they are not designed to stop bouncing. This is the job of the ‘Front shock absorber assembly’ (2905010-1086). La liste des pièces en appelle à deux.

Le “logique” of a shock absorber is to **dampen oscillation** by converting kinetic energy (rebondir) en chaleur. It is a hydraulic piston that forces oil through small, precise valves. As the leaf spring compresses and rebounds, the shock absorber resists this movement, “killing” the bounce and keeping the truck’s tires firmly planted on the road. Without the shock absorbers, the truck would be dangerously unstable, with no reliable steering or braking.

Le Suspension avant FAW provides the mounting points for this system. The ‘Lower left support bracket assy-front shock absorber’ (2905425-2000) and ‘Lower right support bracket assy-front shock absorber’ (2905430-2000) are the heavy-duty brackets on the axle. The ‘Hex head guide bolts’ (CQ15116120T, CQ15116140T) and ‘Large washers’ (Q40216) are the precision fasteners used to mount the shocks to these brackets, as detailed in Assembly 505.

Core Logic 3: Le système de barre stabilisatrice (Anti-Roll)

La finale “logique” de la Suspension avant FAW is to control **lateral stability** (ou “roulis du corps”). This is the job of the ‘Front lateral stabiliser bar assy’ (2906010-1063), également connu sous le nom de “barre anti-roulis” ou “sway bar.”

C'est un seul, U-shaped torsional spring. Its logic is to connect the left and right sides of the suspension *indirectly*. When the truck corners, la cabine “leans,” compressing the outside spring. Ce “twist” is transferred along the stabilizer bar, which then *pulls down* on the *inside* of the suspension, forcing the cab to stay level.

Ce Suspension avant FAW parts list includes all the mounting components for this system. The ‘Bracket-front lateral stabilizer’ (2906444-50UN) and its ‘Cover’ (2906446-50UN) and ‘Bushing’ (2906447-50UN) are used to mount the main bar to the truck’s frame. The ‘Boom & bushing assy-front lateral stabiliser bar’ (2906320-92V) sont les “fin des liens” that connect the “bras” of the bar to the axle, completing the system.

The Axle Connection: Boulons en U (2902411-92V)

The single most critical connection in the Suspension avant FAW is how the leaf spring pack attaches to the solid front axle. This is accomplished by the ‘U-bolt-front leaf spring’ (2902411-56B et 2902411-92V). The list calls for two of each, for a total of four U-bolts (two for each spring pack).

Ce ne sont pas des boulons standards. Ils sont à haute résistance, forged steel U-bolts that “hook” *under* the axle and pass *up* through the ‘Cover-front leaf spring’ (2902406A50A), which is a heavy-duty cap that sits on top of the spring pack.

The eight ‘Nut-fasten U-bolt’ (2902413-76UN) are then used to tighten this “sandwich” (Couverture – Spring Pack – Essieu) together with thousands of pounds of clamping force. This is what prevents the front axle from “marche” ou “déplacement” under the truck. A loose U-bolt is a critical safety failure, leading to a loss of steering control. The ‘Soft pad-front leaf spring’ (2902432-50UN) is a rubber insulator pad that sits between the spring pack and the axle seat to reduce vibration. Tout cela “clamping logic” is a core part of the Suspension avant FAW.

FAW Front Suspension Parts List

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 38 components identified in the ‘Front Suspension’ (508) schéma du tracteur FAW CA4251P66K24T1A3E5. Ce Suspension avant FAW assembly is a complete system.

Spécifications techniques et contexte d'assemblage

Les spécifications pour le Suspension avant FAW sont définis par sa fonction de système complet, système de suspension et d'amortissement robuste. L'ensemble Suspension avant FAW assembly is a safety-critical system.