FAW Central Bridge Differential Assembly: Uma análise crítica de 12 Componentes principais

Bem-vindo a esta análise técnica crítica do FAW Central Bridge Differential Assembly (Parte não. 2503010QA6T). Este é o “lógica” core of the “centre” ou “forward” drive axle for the FAW Jiefang CA4251P66K24T1A3E5 6×4 trator semirreboque diesel. This is the component that allows the truck to make turns without wheel hop.

O FAW Central Bridge Differential Assembly, também conhecido como “inter-wheel differential carrier,” é um conjunto complexo de engrenagens. É responsável por receber energia do eixo motor através do circuito principal “engrenagem anelar” e então dividir esse poder entre os dois “semi-eixos” (eixos) que vão para as rodas.

This in-depth guide is an essential resource for professional driveline technicians and parts specialists. Vamos desconstruir todo FAW Central Bridge Differential Assembly em seu 12 componentes reparáveis, including the main ‘Differential case assembly’, the ‘Ring gear’, the internal ‘Planetary’ and ‘Half-shaft’ engrenagens, and the critical tapered roller bearings.

Componente principal: O Caso Diferencial (2403015FA6T)

O coração do FAW Central Bridge Differential Assembly é o ‘Conjunto da caixa do diferencial do eixo traseiro’ (2403015FA6T). (Observação: “Eixo traseiro” is used as a generic term for the diff case, but this assembly is for the *centre* bridge). Este é o ferro fundido resistente “jaula” ou “operadora” that houses the entire internal gearset.

This component is machined with extreme precision, as it must hold the “aranha” e “lado” gears in a perfect mesh. As shown in the parts list, this case is a two-piece assembly, bolted together to form a sphere:

• ‘Caixa direita do diferencial do eixo traseiro’ (2403018FA6T) – 1 unidade
• ‘Caixa esquerda do diferencial do eixo traseiro’ (2403017FA6T) – 1 unidade

These two halves are machined as a **matched set** and must never be interchanged with halves from another FAW Central Bridge Differential Assembly. The ‘Centre axle driven bevel gear’ (a engrenagem anelar) is bolted to the large flange of this case. Quando o eixo motor gira a coroa, it is *this case* that rotates, which in turn carries the internal spider gears with it.

O “Redução” Lógica: Equipamento do anel (2502037Comer) and Ratio (io = 2,867)

The ‘Centre axle reduction gearbox assembly (io = 2,867)’ (2503010QA6T) and the ‘Centre axle driven bevel gear’ (2502037Comer) define the axle’s “redução” lógica. O “io = 2,867” is the critical “lógica” – it is the **Input/Output ratio**.

This ratio means that for every 2.867 revolutions of the truck’s driveshaft (spinning the pinion gear), this ‘Centre axle driven bevel gear’ (a engrenagem anelar) will rotate exactly *once*. This is the final gear reduction in the entire powertrain. It multiplies the torque from the transmission, providing the immense force needed to move a fully-loaded trailer. This is a core function of the FAW Central Bridge Differential Assembly.

The ‘Centre axle driven bevel gear’ (engrenagem anelar) is bolted to the ‘Rear axle differential case assembly’ using the 16 ‘Parafusos de flange sextavados’ (Q1851845TF2KS). These are critical, high-shear, single-use fasteners that must be torqued in a precise star pattern to prevent the ring gear from warping or shearing off under load. This gear is the primary input to the FAW Central Bridge Differential Assembly.

O “Diferencial” Lógica: Spider and Side Gears

O “lógica” do FAW Central Bridge Differential Assembly is its ability to allow the left and right wheels to turn at different speeds. This is achieved by the internal gearset:

• **'Engrenagem planetária’ (2403056D1h) – 4 unidades:** Estes são os “engrenagens de aranha.”
• **'Engrenagem de meio eixo’ (2403051D1HB1) – 2 unidades:** Estes são os “engrenagens laterais.”

Here is how this FAW Central Bridge Differential Assembly funciona: The four ‘Planetary gears’ are mounted on two shafts (the ‘Long’ 2403061-A6T e ‘Curto’ 2403062-A6T) that are fixed *inside* the differential case. The two ‘Half-shaft gears’ são estriados nos semi-eixos (semi-eixos) and mesh directly with these four spider gears.

**When driving straight:** The entire case, engrenagens de aranha, and side gears all spin as one solid unit. The spider gears do not rotate on their shafts; they simply act as a “solid block,” forcing both side gears (and thus both wheels) to turn at the same speed.

**When turning a corner:** The inner wheel must slow down, and the outer wheel must speed up. The differential “lógica” allows this. The inner wheel’s side gear slows down. This forces the spider gears to “órbita” ou “andar” around the slower side gear. Esse “walking” movimento, por sua vez, *accelerates* the other side gear, allowing the outer wheel to spin faster. This action is the core logic of the FAW Central Bridge Differential Assembly.

Thrust Washers and Bearings: The Unsung Heroes

The internal gears of the FAW Central Bridge Differential Assembly are under immense separating forces. The parts list includes ‘Gasket-half-shaft gear’ (2403053D1h) and ‘Planetary gear gasket’ (2403058-A9T). Esses “Juntas” are actually critical **thrust washers**.

These are hardened, anti-friction washers placed *behind* the side gears and spider gears. They prevent the steel gears from grinding themselves into the soft cast iron of the differential case. A worn-out thrust washer will create excessive “backlash” ou “slop” in the differential, levando a um “clunk” on acceleration and eventual gear failure.

O inteiro FAW Central Bridge Differential Assembly (the case with the ring gear bolted to it) spins within the main axle housing on two massive ‘Tapered roller bearing assembly’ unidades (2403060-A8T-C00 and 2403070-A6T-C00). These are the main “carrier bearings.” They support the entire weight of the differential, o torque do eixo de transmissão, e todo o peso do caminhão. A failure of these bearings is a critical fault, often heard as a “lamentar” ou “growl.” These bearings are a key serviceable part of the FAW Central Bridge Differential Assembly.

FAW Central Bridge Differential Assembly Parts List

A tabela a seguir fornece o completo, detalhamento de todos 12 components identified in the ‘Central Bridge Differential Assembly (io = 2,867)’ diagrama para o trator FAW CA4251P66K24T1A3E5. Esse FAW Central Bridge Differential Assembly é um conjunto de correspondência de precisão.

Especificações Técnicas e Contexto de Montagem

As especificações para o FAW Central Bridge Differential Assembly são definidos por sua função como um motor de alto torque, conjunto de engrenagens de redução de transmissão final com diferencial integrado. O FAW Central Bridge Differential Assembly é o “lógica” core of the centre axle.