Freno de rueda trasera FAW J6P: Deconstruyendo 33 Piezas críticas para una máxima potencia de frenado

This is a complete technical guide to the Freno de rueda trasera FAW J6P (Model 3502024-48W) Para FAW Jiefang CA3250P66K2L1T1E 6×4 camión volcado. Esta deconstrucción analiza la 33 serviceable component types that form the complete S-cam brake assembly for the tandem drive axles.

El Freno de rueda trasera FAW J6P es un trabajo pesado, S-cam “drum” sistema de frenos. 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 is the main service brake for the vehicle.

This deconstruction will analyze the key serviceable assemblies of the Freno de rueda trasera FAW J6P, including the pneumatic actuator (spring brake chamber), the mechanical linkage (S-cam and slack adjuster), the friction components (brake shoes and linings), and the stationary foundation (axle boss). A properly maintained Freno de rueda trasera 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 Freno de rueda trasera FAW J6P must be inspected regularly.

Centro 1: El “Actuation” Lógica (The Spring Brake Chamber)

Este es el “músculo” del Freno de rueda trasera FAW J6P. This component converts the pneumatic signal from the brake pedal into powerful mechanical force and also provides the parking brake function.

1. Componente: ‘Rear left/right spring cylinder assy’ (3530015-A0E, 3530010-A0E)
Este (compensación 32) is the complete air brake chamber, also known as a “spring brake” o “piggyback” asamblea. El 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.

El Parking Brake Logic es su segundo, critical 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 Freno de rueda trasera 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 Freno de rueda trasera FAW J6P.

2. Componente: ‘Support Plate – Spring Brake Cylinder’ (3502126A483)
Este (compensación 33) is the heavy-duty bracket that mounts the spring brake chamber (compensación 32) to the axle boss. It must be strong enough to withstand the full force of both the service and parking brake applications.

Centro 2: El “Base” Lógica (The Brake Spider/Axle Boss)

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

1. Componente: ‘Left axle boss’ (3503127-A0E) & ‘Rear brake spider’ (3502021-A0E)
Este (compensación 1, 10) es el “araña” o “backing plate”. es un enorme, single-piece cast iron component that bolts to the axle. Es Anchor Point Logic is to absorb all the torque and forces generated by the braking action. The brake shoes (compensación 18) are anchored to this spider, and it is the component that the S-cam (compensación 3) passes through. A cracked spider is a critical failure of the Freno de rueda trasera FAW J6P.

2. Componente: 'Espaciador – axle boss support’ (3502123-A0E) – Cantidad 2
Este (compensación 13) is a precision spacer used to properly position the axle boss on the axle housing, asegurando el Freno de rueda trasera FAW J6P is perfectly aligned with the brake drum.

3. Componente: ‘Rear brake dust pan’ (3502031-A0E) & ‘Front dust pan’ (3502032-A0E)
Este (compensación 8 & 9) is the dust shield assembly. These thin metal plates bolt to the spider (compensación 1) and partially enclose the Freno de rueda trasera FAW J6P to protect the shoes and drum from contamination by rocks, lodo, y escombros del camino, which is critical in a dump truck application.

Centro 3: El “Friction” Lógica (The Brake Shoes & Linings)

Este es el “wear” parte del Freno de rueda trasera FAW J6P. These components are designed to be sacrificed to create the friction needed to stop the truck.

1. Componente: ‘Brake shoe with roller assy’ (3502375-A0E) – Cantidad 4
Este (compensación 18) is the complete brake shoe, which includes the steel “web” and the pre-riveted friction lining. El Freno de rueda trasera FAW J6P uses two of these shoes (primary and secondary) per wheel. This assembly also includes the ‘Roller’ (compensación 26) and ‘Roller Shaft’ (compensación 24).

2. Componente: ‘Rear brake lining I’ (3502406-A0E) & ‘Rear brake lining II’ (3502407-A0E) – Cantidad 4 cada
Este (compensación 20, 21) is the serviceable friction material. El Friction Logic involves two different lining types (I and II), which suggests a “leading/trailing” o “primary/secondary” shoe design for the Freno de rueda trasera FAW J6P. One lining is more aggressive to provide the initial bite, while the other is designed for sustained friction and heat dissipation.

3. Componente: ‘Rivet – brake lining’ (3502408-A0E) – Cantidad 112
Este (compensación 22) is the set of 112 rivets used to attach the ‘Brake linings’ (compensación 20, 21) to the steel brake shoe web (compensación 19). This riveted design is common in heavy-duty Freno de rueda trasera FAW J6P systems as it is strong and allows for the linings to be replaced.

4. Componente: ‘Return spring’ (3502436-A0E) & ‘Anchor pin’ (3502398-A0E)
Este (compensación 28, 27) is the retraction system. The heavy-duty ‘Return spring’ connects to the ‘Anchor pin’ (compensación 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 Freno de rueda trasera FAW J6P a “drag,” leading to extreme overheating and failure.

Centro 4: El “S-Cam & Adjuster” Lógica (The Actuation Linkage)

This group of components forms the mechanical link between the air chamber (Centro 1) and the brake shoes (Centro 3). It translates the linear push from the air chamber into a rotary motion that spreads the shoes apart. Este es el corazón del Freno de rueda trasera FAW J6P.

1. Componente: ‘Left/Right slack adjuster assy’ (3502205-A6E, 3502210-A6E) – Cantidad 1 cada
Este (compensación 14) es el “slack adjuster”. Este Self-Adjusting Logic is a key feature of a modern Freno de rueda trasera FAW J6P. As the brake linings (compensación 20, 21) wear, this device automatically adjusts its angle on the camshaft to ensure the “slack” (distance) between the lining and the drum remains minimal. This provides a consistent, responsive brake pedal.

2. Componente: ‘Left/Right rear brake camshaft’ (3502151-A6E, 3502152-A6E) – Cantidad 1 cada
Este (compensación 3) is the ‘S-cam’. This is a forged steel shaft with an “S” shaped head at one end. As the slack adjuster (compensación 14) rotates this shaft, el “S” shape pushes against the ‘Brake shoe rollers’ (compensación 26), forcing the brake shoes apart and into the drum. This is the final mechanical force multiplication in the Freno de rueda trasera FAW J6P.

3. Componente: ‘Camshaft bearing assy’ (3502135-A0E) & ‘Seals’ (3502153-A0E)
Este (compensación 4, 5, 7) is the bearing and seal system for the camshaft. The camshaft must rotate smoothly within the axle boss (compensación 1). These ‘Bearings’ (compensación 4) and ‘Oil seals’ (compensación 5, 7) ensure a low-friction rotation and prevent water and grit from entering and seizing the Freno de rueda trasera FAW J6P árbol de levas. Regular greasing via the ‘Grease nipple’ (compensación 1) es esencial.

Freno de rueda trasera FAW J6P: Complete 33-Part Breakdown

La siguiente tabla proporciona la información completa, desglose detallado de todos 33 component groups in the Freno de rueda trasera FAW J6P Montaje para FAW Jiefang CA3250P66K2L1T1E 6×4 camión volcado. This list is essential for any service of the Freno de rueda trasera FAW J6P.

Especificaciones principales

Las especificaciones para el Freno de rueda trasera 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 Freno de rueda trasera FAW J6P is essential for vehicle safety.