Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante: Por que estes 18 Peças críticas são importantes

Bem-vindo a este guia técnico crítico sobre o Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante. Este é o completo “forward” ou “middle” drive axle for the FAW Jiefang CA4251P66K24T1A3E5 6×4 trator semirreboque diesel. This is the core component that makes the “6×4” drive system possible.

O Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante é um complexo, “through-drive” eixo. Isso é “lógica” is to perform two functions simultaneously: primeiro, it receives power from the main driveshaft and sends it to its own wheels via the ‘Half-Shafts’. Segundo, it passes that power *through* its differential carrier via the ‘Through-Shaft’ to the rearmost drive axle.

This in-depth guide is an essential resource for professional driveline technicians and parts specialists. Vamos desconstruir todo Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante em seu 18 componentes reparáveis, including the main ‘Centre axle housing’, the ‘Left’ and ‘Right’ semi-eixos, and the critical ‘Through-shaft’ bearing and seal assembly.

Componente principal: The ‘Centre Axle Housing’ (2501010BA6T)

A fundação do Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante is the ‘Centre axle housing assembly’ (2501010BA6T). Este é o principal componente estrutural, often called the “banjo” ou “carrier.” É um enorme, high-strength casting, typically made of ductile cast iron, designed to handle the entire weight of the tractor’s rear and its cargo, as well as the immense torque loads from the driveline.

This housing performs three critical functions. Primeiro, é o “esqueleto” that provides the mounting points for the truck’s suspension. Segundo, it is the rigid “caso” that holds the differential (the ring and pinion gearset) in perfect, precision-machined alignment. Terceiro, it acts as the “axle tubes,” extending outwards to hold the wheel hub bearings.

A crack or bend in this Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante (Por exemplo, from an impact or overloading) is a catastrophic, vehicle-ending failure. Its structural integrity is paramount.

O “Half-Shafts”: Esquerda (2503081-A6T) & Certo (2503082-A6T)

O “Half-Shafts” componentes do Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante are the ‘Centre axle left half-shaft’ (2503081-A6T) and the ‘Centre axle right half-shaft’ (2503082-A6T). Estes são os “eixos” themselves. They are solid, forged shafts made from an incredibly tough and ductile steel alloy (like 4340 chromoly), designed to twist slightly under extreme torque without breaking.

These are **full-floating** axles. This is a critical design feature for a heavy-duty truck. In this system, the axle shafts “float” inside the housing. Their *only* job is to transmit torque from the differential to the wheels. They do *not* support the weight of the vehicle. The vehicle’s weight is supported by the ‘Centre axle housing assembly’ em si, via the large wheel hub bearings.

Esse “full-float” design means that if a Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante‘s shaft were to break, the wheel *will not fall off* the truck. The shafts are splined on their inner end (to engage with the differential’s “engrenagens laterais”) and flanged on their outer end, where they are secured to the wheel hub by the 20 ‘Parafusos de flange sextavados’ (Q1851650TF2K). The reason for a separate “Esquerda” e “Certo” half-shaft is simply their different lengths to accommodate the central differential.

O “Through-Shaft Logic”: Powering the 6×4

The most critical “lógica” do Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante é o “Through-Shaft.” This is what makes it a “centre” (ou “middle”) eixo. This system allows the main driveshaft to send power *through* this axle to the rearmost axle.

This is achieved with several key components:

• **’Through-shaft’ (2502161-A9T):** This is the main shaft that passes *through* the differential carrier, driven by the pinion.
• **’Centre axle output flange assembly’ (2502165-A6T):** This is the flange splined to the *end* of the through-shaft, where the inter-axle driveshaft (veja montagem 326) connects.
• **’Tapered roller bearing assembly’ (2502040-A6T-C00):** This massive bearing supports the through-shaft, handling the immense radial and axial loads.

This bearing is held in place by the ‘Bearing cap-through-shaft’ (2502168K5H) and its ‘Gasket-bearing cap’ (2502169K5HB1). This entire sub-assembly is then sealed by the ‘Through-shaft oil seal assembly’ (2502170-A8T-C00) and its ‘O-ring’ (CQ7345475C), which are critical for preventing gear oil from leaking out the back of the Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante. Esse “pass-through” design is the core of the 6×4 drivetrain’s logic.

Serviço, Selagem, e fixadores

O Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante is designed for heavy-duty service. It includes three critical service plugs:

• **’Oil filler plug’ (2401051-A0R):** O “fill” e “level check” porta.
• **’Inner hex tapered magnetic screw plug’ (T62104M):** O “ralo” plugue. Its magnet is a key diagnostic tool, as it traps metal particles from wear, indicating the health of the Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante.
• **’Breather plug’ (T905):** This essential vent prevents pressure from building up in the housing as it heats, which would blow out the ‘Through-shaft oil seal’ (2502170-A8T-C00) and wheel seals.

The system is sealed with ‘Gasket rings’ (CQ72324T5) for the plugs. The entire assembly is held together with high-tensile fasteners. O 20 ‘Parafusos de flange sextavados’ (Q1851650TF2K) are for the axle shafts, while ‘Hex head bolts’ (CQ1501445), ‘Spring gaskets’ (Q40314), and the ‘Nut-pinion shaft bearing’ (2402071K5H) are used to secure the bearing caps and through-shaft flange. This robust hardware is essential for the reliability of the Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante.

Carcaça do eixo central FAW, Half-Shafts And Through-Shaft Logical Assembly Parts List

A tabela a seguir fornece o completo, detalhamento de todos 18 components identified in the ‘Centre Axle Housing, Conjunto lógico de meio-eixo e eixo passante’ diagrama para o trator FAW CA4251P66K24T1A3E5.

Especificações Técnicas e Contexto de Montagem

As especificações para o Carcaça do eixo central FAW, Conjunto lógico de meio-eixo e eixo passante are defined by its complex, multi-part design as a load-bearing, “through-drive” eixo.