Freio de roda central FAW J6P: Desconstruindo 32 Peças críticas para uma potência de parada perfeita

Este é um guia técnico completo para o Freio de roda central FAW J6P (Model 3503025-A6E) para o FAW Jiefang CA3250P66K2L1T1E 6×4 caminhão despejando. Esta desconstrução analisa o 32 serviceable component types that form the complete S-cam brake assembly for the middle (forward) drive axle.

O Freio de roda central FAW J6P é um serviço pesado, S-cam “drum” sistema de freio. 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 Freio de roda 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). A properly maintained Freio de roda central FAW J6P is the most critical safety system on the tandem axles, and its condition is non-negotiable for safe operation. Cada parte do Freio de roda central FAW J6P must be inspected regularly.

Essencial 1: O “Actuation” Lógica (The Air Chamber)

Este é o “músculo” do Freio de roda central FAW J6P. This component converts the pneumatic signal from the brake pedal into powerful mechanical force.

1. Componente: ‘Center left brake air chamber assy’ (3530020-A0E) & ‘Center right’ (3530025-A0E)
Esse (Comp. 32) is the complete air brake chamber. Este é um “freio de mola” ou “piggyback” conjunto. O 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.

O 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 Freio de roda 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 Freio de roda central FAW J6P.

Essencial 2: O “Foundation” Lógica (The Brake Spider)

This group of components forms the stationary foundation of the Freio de roda central 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) – Quantidade 1
Esse (Comp. 10) é o “aranha” ou “backing plate”. É um enorme, single-piece cast iron component that bolts to the axle. Isso é 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. Componente: ‘Spacer – axle boss support’ (3502123-A0E) – Quantidade 2
Esse (Comp. 13) is a precision spacer used to properly position the axle boss on the axle housing, garantindo o Freio de roda central FAW J6P is perfectly aligned with the brake drum.

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

Essencial 3: O “Friction” Lógica (The Brake Shoes & Linings)

Este é o “wear” parte do Freio de roda central FAW J6P. These components are designed to be sacrificed to create the friction needed to stop the truck.

1. Componente: ‘Brake shoe with lining assy’ (3502375-A0E) – Quantidade 4
Esse (Comp. 18) is the complete brake shoe, which includes the steel “web” and the pre-riveted friction lining. O Freio de roda central FAW J6P uses two of these shoes (primary and secondary) per wheel.

2. Componente: ‘Rear brake lining I’ (3502406-A0E) & ‘Rear brake lining II’ (3502407-A0E) – Quantidade 4 cada
Esse (Comp. 20, 21) is the serviceable friction material. O 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. Componente: ‘Rivet – brake lining’ (3502408-A0E) – Quantidade 112
Esse (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 Freio de roda central FAW J6P systems as it is strong and allows for the linings to be replaced.

4. Componente: ‘Retorno da primavera’ (3502436-A0E) & ‘Anchor pin’ (3502398-A0E)
Esse (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 Freio de roda central FAW J6P para “arrastar,” leading to extreme overheating and failure.

Essencial 4: O “Fraude & Adjuster” Lógica (The Actuation Linkage)

This group of components forms the mechanical link between the air chamber (Essencial 1) and the brake shoes (Essencial 3). It translates the linear push from the air chamber into a rotary motion that spreads the shoes apart. Este é o coração do Freio de roda central FAW J6P.

1. Componente: ‘Left/Right slack adjuster assy’ (3503205-A0E, 3503210-A0E) – Quantidade 1 cada
Esse (Comp. 14) é o “slack adjuster”. Esse Self-Adjusting Logic is a key feature of a modern Freio de roda central FAW J6P. As the brake linings (Comp. 20, 21) wear, this device automatically adjusts its angle on the camshaft to ensure the “folga” (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) – Quantidade 1 cada
Esse (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, o “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 Freio de roda central FAW J6P.

3. Componente: ‘Camshaft bearing assy’ (3502135-A0E) & ‘Seals’ (3502153-A0E)
Esse (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 Freio de roda central FAW J6P eixo de comando.

Freio de roda central FAW J6P: Análise completa de 32 partes

A tabela a seguir fornece o completo, detalhamento de todos 32 component groups in the Freio de roda central FAW J6P montagem para o FAW Jiefang CA3250P66K2L1T1E 6×4 caminhão despejando. Esta lista é essencial para qualquer serviço da Freio de roda central FAW J6P.

Especificações principais

As especificações para o Freio de roda 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 Freio de roda central FAW J6P é essencial para a segurança do veículo.