Frein de roue central FAW J6P: Déconstruction 32 Pièces critiques pour une puissance de freinage impeccable

This is a complete technical guide to the Frein de roue central FAW J6P (Model 3503025-A6E) Pour le FAW Jiefang CA3250P66K2L1T1E 6×4 tombereau. Cette déconstruction analyse 32 serviceable component types that form the complete S-cam brake assembly for the middle (avant) drive axle.

Le Frein de roue central FAW J6P est un véhicule robuste, S-cam “drum” système de freinage. This robust design is the industry standard for heavy-duty drive axles, prized for its durability, high stopping torque, and serviceability. Its primary function is to convert the kinetic energy of the 25-ton truck into heat, safely bringing the vehicle to a stop. It works by using compressed air to force a set of brake shoes and linings against the inner surface of the rotating brake drum.

This deconstruction will analyze the key serviceable assemblies of the Frein de roue central FAW J6P, including the pneumatic actuator (air chamber), the mechanical linkage (S-cam and slack adjuster), the friction components (brake shoes and linings), and the stationary foundation (axle boss). Un bien entretenu Frein de roue central FAW J6P is the most critical safety system on the tandem axles, and its condition is non-negotiable for safe operation. Every part of the Frein de roue central FAW J6P must be inspected regularly.

Cœur 1: Le “Actuation” Logique (The Air Chamber)

C'est le “muscle” de la Frein de roue central FAW J6P. This component converts the pneumatic signal from the brake pedal into powerful mechanical force.

1. Composant: ‘Center left brake air chamber assy’ (3530020-A0E) & ‘Center right’ (3530025-A0E)
Ce (Comp 32) is the complete air brake chamber. C'est un “spring brake” ou “piggyback” assemblée. Le Pneumatic-to-Mechanical Logic is its primary function: when the driver presses the brake pedal, compressed air fills the service chamber, pushing a rod out to apply the brakes.

Le Parking Brake Logic is the second function. A powerful internal spring is held compressed by constant air pressure. When the driver pulls the park brake, this air is released, and the spring mechanically expands, forcing the pushrod out and locking the Frein de roue central FAW J6P. A leaking diaphragm in this chamber is a common failure point and will result in a dangerous air leak and a loss of braking power. This is a critical safety component of the Frein de roue central FAW J6P.

Cœur 2: Le “Foundation” Logique (The Brake Spider)

This group of components forms the stationary foundation of the Frein de roue central FAW J6P. It bolts directly to the axle housing and serves as the anchor point for the brake shoes.

1. Composant: ‘Left axle boss’ (3503127-A0E) – Quantité 1
Ce (Comp 10) est le “araignée” ou “backing plate”. C'est un énorme, single-piece cast iron component that bolts to the axle. C'est Anchor Point Logic is to absorb all the torque and forces generated by the braking action. The brake shoes (Comp 18) are anchored to this spider, and it is the component that the S-cam (Comp 3) passes through.

2. Composant: ‘Spacer – axle boss support’ (3502123-A0E) – Quantité 2
Ce (Comp 13) is a precision spacer used to properly position the axle boss on the axle housing, Assurer le Frein de roue central FAW J6P is perfectly aligned with the brake drum.

3. Composant: ‘Rear brake dust pan’ (3502031-A0E) & ‘Front dust pan’ (3502032-A0E)
Ce (Comp 8 & 9) is the dust shield assembly. These thin metal plates bolt to the spider (Comp 10) and partially enclose the Frein de roue central FAW J6P to protect the shoes and drum from contamination by rocks, boue, and road debris, which is critical in a dump truck application.

Cœur 3: Le “Friction” Logique (The Brake Shoes & Linings)

C'est le “wear” une partie du Frein de roue central FAW J6P. These components are designed to be sacrificed to create the friction needed to stop the truck.

1. Composant: ‘Brake shoe with lining assy’ (3502375-A0E) – Quantité 4
Ce (Comp 18) is the complete brake shoe, which includes the steel “web” and the pre-riveted friction lining. Le Frein de roue central FAW J6P uses two of these shoes (primary and secondary) per wheel.

2. Composant: ‘Rear brake lining I’ (3502406-A0E) & ‘Rear brake lining II’ (3502407-A0E) – Quantité 4 chaque
Ce (Comp 20, 21) is the serviceable friction material. Le Friction Logic involves two different lining types (I and II), which suggests a “leading/trailing” ou “primary/secondary” shoe design. One lining is more aggressive to provide the initial bite, while the other is designed for sustained friction and heat dissipation.

3. Composant: ‘Rivet – brake lining’ (3502408-A0E) – Quantité 112
Ce (Comp 22) is the set of 112 rivets used to attach the ‘Brake linings’ (Comp 20, 21) to the steel brake shoe web. This riveted design is common in heavy-duty Frein de roue central FAW J6P systems as it is strong and allows for the linings to be replaced.

4. Composant: ‘Return spring’ (3502436-A0E) & ‘Anchor pin’ (3502398-A0E)
Ce (Comp 28, 27) is the retraction system. The heavy-duty ‘Return spring’ connects to the ‘Anchor pin’ (Comp 27) and aggressively pulls the brake shoes back away from the brake drum the instant the driver releases the pedal. A weak or broken return spring will cause the Frein de roue central FAW J6P à “drag,” leading to extreme overheating and failure.

Cœur 4: Le “S-Cam & Adjuster” Logique (The Actuation Linkage)

This group of components forms the mechanical link between the air chamber (Cœur 1) and the brake shoes (Cœur 3). It translates the linear push from the air chamber into a rotary motion that spreads the shoes apart. This is the heart of the Frein de roue central FAW J6P.

1. Composant: ‘Left/Right slack adjuster assy’ (3503205-A0E, 3503210-A0E) – Quantité 1 chaque
Ce (Comp 14) est le “slack adjuster”. Ce Self-Adjusting Logic is a key feature of a modern Frein de roue central FAW J6P. As the brake linings (Comp 20, 21) wear, this device automatically adjusts its angle on the camshaft to ensure the “mou” (distance) between the lining and the drum remains minimal. This provides a consistent, responsive brake pedal.

2. Composant: ‘Left/Right rear brake camshaft’ (3502151-A6E, 3502152-A6E) – Quantité 1 chaque
Ce (Comp 3) is the ‘S-cam’. This is a forged steel shaft with an “S” shaped head at one end. As the slack adjuster (Comp 14) rotates this shaft, le “S” shape pushes against the ‘Brake shoe rollers’ (Comp 26), forcing the brake shoes apart and into the drum. This is the final mechanical force multiplication in the Frein de roue central FAW J6P.

3. Composant: ‘Camshaft bearing assy’ (3502135-A0E) & ‘Seals’ (3502153-A0E)
Ce (Comp 4, 5, 7) is the bearing and seal system for the camshaft. The camshaft must rotate smoothly within the axle boss (Comp 10). These ‘Bearings’ (Comp 4) and ‘Oil seals’ (Comp 5, 7) ensure a low-friction rotation and prevent water and grit from entering and seizing the Frein de roue central FAW J6P arbre à cames.

Frein de roue central FAW J6P: Complete 32-Part Breakdown

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 32 component groups in the Frein de roue central FAW J6P assemblage pour le FAW Jiefang CA3250P66K2L1T1E 6×4 tombereau. Cette liste est indispensable pour tout service du Frein de roue central FAW J6P.

Spécifications de base

Les spécifications pour le Frein de roue central FAW J6P are defined by its robust S-cam, air-actuated design, built for the heavy-duty service of a tandem drive axle. A properly adjusted and maintained Frein de roue central FAW J6P is essential for vehicle safety.