Conjunto do eixo de saída da subcaixa FAW: Por que estes 14 Peças críticas definem o desempenho do sistema de transmissão

Bem-vindo a este guia técnico crítico sobre o Conjunto do eixo de saída da subcaixa FAW. Este é o completo “final drive” assembly within the auxiliary “subcaixa” of the manual transmission, projetado para o FAW Jiefang CA4251P66K24T1A3E5 6×4 trator semirreboque diesel.

O Conjunto do eixo de saída da subcaixa FAW is the final link in the chain of torque multiplication. It receives power from the main box and the sub-box countershaft, e seu “lógica” lies in the 2-speed (High/Low range) synchronizer that is built onto it. This assembly is responsible for delivering the final, selected gear ratio to the truck’s driveshaft.

Este guia detalhado é um recurso essencial para técnicos profissionais de transmissão e especialistas em peças.. Vamos desconstruir todo Conjunto do eixo de saída da subcaixa FAW em seu 14 componentes reparáveis, incluindo o eixo principal, the ‘Low gear’ and ‘High gear’ synchronizer hubs, o rolamento principal, and the final output flange.

Componente principal: The Output Shaft (1701541-A7G)

A espinha dorsal do Conjunto do eixo de saída da subcaixa FAW is the ‘Output shaft-sub box’ (1701541-A7G). Este é um único, enorme, componente forjado feito de alta resistência, aço endurecido. It is the final output shaft of the entire transmission system.

This shaft is precision-machined with multiple splined sections and bearing journals. Isso é “nariz” ou “dica” is supported by a pilot bearing inside the transmission’s main shaft, while its “tail” is supported by the large ‘Dual-row tapered roller bearing’ (350614 X4DR-1).

The splined sections of this shaft are the “lógica” hubs. They are designed to hold the “mangas deslizantes” of the range synchronizer, which are the components that lock either the “Alto” ou “Baixo” gear to the shaft. The integrity of these splines is critical, as they must transfer 100% of the vehicle’s final drive torque. Any twist or shear in this component of the Conjunto do eixo de saída da subcaixa FAW is a catastrophic failure.

O “Faixa” Lógica: High and Low Gear Synchronizers

O núcleo “lógica” do Conjunto do eixo de saída da subcaixa FAW is the 2-speed range selector. Este é um único, large synchronizer assembly that provides two speeds: “Baixo” (a reduction gear) e “Alto” (acionamento direto).

**1. Gama Baixa:** The ‘Low gear-sub box’ (1701542FA0L) é o principal “dirigido” gear for the low range. It is in constant mesh with the counter-shaft. Quando o motorista seleciona “Baixo,” the ‘Sliding sleeve-sub box synchronizer’ (1701561FA0L) is moved (by a shift fork) to engage its “dentes de cachorro” with this gear, locking it to the ‘Output shaft’. This routes power through the reduction gearset, providing maximum torque. This gear is held in place by the ‘Limit stop ring-low gear’ (1701543-A7G) and ‘Locating washer-low gear’ (1701544-A7G).

**2. High Range:** The ‘High gear synchronizer assembly’ (1701555FA0L) fornece o “Alto” velocidade. This is typically a “acionamento direto” 1:1 razão. Quando o motorista seleciona “Alto,” the *same* ‘Sliding sleeve’ (1701561FA0L) is moved in the opposite direction. It disengages from the low gear and locks directly to the transmission’s main input shaft (which is also the “entrada” to this sub-box). Esta ação “fechaduras” the main shaft and the output shaft together, causing them to spin at the same speed (1:1 razão), bypassing the reduction gears entirely.

This entire High/Low clutch is a single unit on the Conjunto do eixo de saída da subcaixa FAW, comprised of the ‘Sliding sleeve’, the ‘High gear’ eixo, and the ‘Low gear’. The ‘Spring-sub box synchronizer [outer]’ (1701558-A7G) unidades são as “detenção” springs that provide the “sentir” and holding power for the synchronizer keys. O Conjunto do eixo de saída da subcaixa FAW‘s function is defined by this clutch.

The Output End: Consequência, Flange, e velocímetro

A parte traseira do Conjunto do eixo de saída da subcaixa FAW is where power is delivered to the truck and where speed is measured.

**Rolamento principal (350614 X4DR-1):** The ‘Dual-row tapered roller bearing’ is the main output shaft bearing. This is a massive bearing pressed onto the ‘Output shaft’ and seated in the ‘Rear housing assembly’. Its dual-row tapered design is critical, as it is designed to absorb the immense radial loads *and* the extreme axial (impulso) loads of the driveshaft pushing and pulling on the transmission. This is a non-negotiable, heavy-duty component of the Conjunto do eixo de saída da subcaixa FAW.

**Output Flange (1701616-A7G):** The ‘Output flange’ is the final piece. Este pesado, forged-steel flange is splined onto the tail of the ‘Output shaft’. The truck’s main driveshaft (propshaft) is then bolted to this flange. This component must be secured with immense force, which is the job of the ‘Locking nut assembly’ (1701620-A7G). This is a prevailing-torque nut designed to never back off.

**Speedometer (1701571-A9P):** The ‘Rod-speedometer driven gear’ (1701571-A9P) é o “dirigir” gear for the speedometer. It is pressed onto the ‘Output shaft’. As the shaft spins, this gear (muitas vezes chamado de “anel de tom”) turns a sensor, providing the “vehicle speed” signal to the ECU and dashboard. The ‘Tachometer gear gasket’ (1701572-A7G) is a shim used to set the correct air gap for this sensor.

Finalmente, the ‘Dust cover’ (1701617-A7G) is a metal shield that is pressed on behind the flange to protect the main output shaft seal (in the rear housing) from road dirt, água, e detritos. This small part is critical to the long-term, leak-free operation of the Conjunto do eixo de saída da subcaixa FAW.

FAW Sub-Box Output Shaft Assembly Parts List

A tabela a seguir fornece o completo, detalhamento de todos 14 components identified in the ‘Sub-Box Output Shaft Assembly’ diagrama para o trator FAW CA4251P66K24T1A3E5. Uma reconstrução do Conjunto do eixo de saída da subcaixa FAW requires careful attention to the synchronizer components.

Especificações Técnicas e Contexto de Montagem

As especificações para o Conjunto do eixo de saída da subcaixa FAW are defined by its function as the final, range-shifting output of the transmission. O inteiro Conjunto do eixo de saída da subcaixa FAW is a precision-balanced set.