- Cidade de Chang Chun, Província de Jilin, China
por 
Bem-vindo a este guia técnico abrangente sobre o FAW First Shaft Assembly And Input Gear, o completo “entrada” group for the manual transmission in the FAW Jiefang CA4251P66K24T1A3E5 6×4 trator semirreboque diesel. This assembly is the critical link between the engine’s clutch and the transmission’s gearset.
O FAW First Shaft Assembly And Input Gear (also known as the input shaft) is responsible for receiving 100% of the engine’s torque from the clutch disc. It holds the main ‘Input Gear’ (1701121-A0L) qual, por sua vez, drives the transmission’s counter-shaft, setting the entire gear-driven system in motion.
Este guia detalhado é um recurso essencial para técnicos profissionais de transmissão e especialistas em peças.. Vamos desconstruir todo FAW First Shaft Assembly And Input Gear, breaking it down into its 11 componentes reparáveis, including the main shaft, the input gear, the critical support bearings, and all the circlips and seals that ensure its precise alignment and leak-free operation.
O FAW First Shaft Assembly And Input Gear is composed of two primary, named components:
**1. First Shaft – Transmissão (1701112-A7G):** Este é o “First Shaft,” more commonly known as the transmission input shaft. It is a high-strength, hardened steel shaft. A frente “nose” of this shaft is splined and extends into the clutch housing, where it engages with the splined hub of the clutch disc. This spline is what allows the FAW First Shaft Assembly And Input Gear to be connected (and disconnected) from the engine’s flywheel.
**2. Input Gear – First Shaft (1701121-A0L):** Este é o “Input Gear.” Este grande, helically-cut gear is permanently fixed (either splined or press-fit) onto the ‘First Shaft’. Its function is to transfer 100% of the engine’s torque from the shaft to the transmission’s counter-shaft, which is in constant mesh with this gear. The helical cut of the teeth is a critical design feature, ensuring quiet operation and maximum surface area contact for high-torque transfer. A chipped or worn tooth on this gear is a catastrophic failure for the FAW First Shaft Assembly And Input Gear and the entire transmission.
O inteiro FAW First Shaft Assembly And Input Gear must be supported as it spins under immense loads. This is the job of the ‘Deep groove ball bearing with stop ring’ (6212-ZNBR/C3YB2). This is the main bearing for the input shaft.
Este grande, heavy-duty ball bearing (a “6212” série) is pressed onto the ‘First Shaft’ (1701112-A7G). Its outer race is then secured in a precision-bored hole in the ‘Front housing’ (bell housing) of the transmission case. This bearing must handle both the “radial” carregar (the sideways force from the gears pushing against each other) e o “axial” carregar (the push/pull force from the clutch being engaged and disengaged).
O “stop ring” (or snap ring) on the bearing’s outer race is a critical feature. This ring fits into a groove in the transmission housing, locking the bearing (and thus the entire FAW First Shaft Assembly And Input Gear) in its precise fore-and-aft position. This is a vital function for maintaining the perfect gear mesh inside the transmission.
O FAW First Shaft Assembly And Input Gear requires incredibly precise “jogo final” (the amount of in-and-out movement). This is controlled by a complex set of “selective fit” circlips and a gasket.
The parts list calls out four separate ‘Circlip – Rolamento traseiro do primeiro eixo’ items (1701131-A7G, 1701132-A7G, 1701133-A7G, and 1701134-A7G), as well as a ‘Gasket – Rolamento traseiro do primeiro eixo’ (1701123-A7G). This indicates that these parts are not identical.
Este é um “selective fit” ou “shimming” sistema. The different part numbers for the circlips correspond to different, precise thicknesses. During assembly, a technician must measure the shaft’s end-play with a dial indicator. They will then consult a chart and select the correct-thickness circlip and/or gasket from this set. This process “sets the preload” on the main bearing. Using the wrong circlip will cause the FAW First Shaft Assembly And Input Gear to be too “apertado” (leading to bearing failure) or too “solto” (leading to gear whine and misalignment).
A separate ‘Circlip – engrenagem reversa’ (1701314-A7G) is also listed. This is a standard snap ring used to hold the reverse idler gear in its proper place on its own shaft, which is also part of the FAW First Shaft Assembly And Input Gear‘s overall function.
O FAW First Shaft Assembly And Input Gear is completed by two critical, but small, componentes: the ‘Bushing’ (1701111-A7G) and the ‘Oil seal – first shaft’ (1701135-A7G).
**1. O ‘selo de óleo’ (1701135-A7G):** Este é o principal “input shaft seal.” It is a radial lip seal that is pressed into the front of the transmission housing. Its flexible rubber lip rides on a polished surface of the first shaft. Its only job is to keep the transmission’s gear oil *inside* the transmission. A failure of this seal is a critical failure of the FAW First Shaft Assembly And Input Gear sistema, as it allows gear oil to leak into the dry clutch housing, saturating the clutch disc and causing it to slip and fail.
**2. The ‘Bushing’ (1701111-A7G):** Este é o “pilot bushing” for the main shaft. The rear of the ‘First Shaft’ (eixo de entrada) is hollowed out. O “nose” ou “dica” of the transmission’s *main* shaft (the one with all the sliding gears) fits *inside* this hollowed-out section. This bushing, made of bronze or a similar low-friction material, is pressed into this hole. It provides the front support for the entire main shaft. A worn bushing here will cause the main shaft to “oscilar,” leading to gear grinding, vibração, and shifting problems. It is a critical, often-overlooked part of the FAW First Shaft Assembly And Input Gear.
A tabela a seguir fornece o completo, detalhamento de todos 11 components identified in the ‘First Shaft Assembly and Input Gear’ diagrama para o trator FAW CA4251P66K24T1A3E5. Uma reconstrução do FAW First Shaft Assembly And Input Gear requires careful selection of the correct circlips.
| Marca | Parte não. | Nome da peça | Quantidade |
|---|---|---|---|
| 1 | 1701135-A7G | Vedação de óleo – first shaft | 1 |
| 2 | 1701131-A7G | Circlip – Rolamento traseiro do primeiro eixo | 1 |
| 3 | 1701132-A7G | Circlip – Rolamento traseiro do primeiro eixo (See 1701131-A7G) | 1 |
| 4 | 1701133-A7G | Circlip – Rolamento traseiro do primeiro eixo (See 1701131-A7G) | 1 |
| 5 | 1701134-A7G | Circlip – Rolamento traseiro do primeiro eixo (See 1701131-A7G) | 1 |
| 6 | 6212-ZNBR/C3YB2 | Deep groove ball bearing with stop ring | 1 |
| 7 | 1701123-A7G | Junta – Rolamento traseiro do primeiro eixo | 1 |
| 8 | 1701314-A7G | Circlip – engrenagem reversa | 1 |
| 9 | 1701112-A7G | First shaft – transmissão | 1 |
| 10 | 1701111-A7G | Casquilho | 1 |
| 11 | 1701121-A0L | Input gear – first shaft | 1 |
As especificações para o FAW First Shaft Assembly And Input Gear are defined by its function as the primary torque input for the transmission. Esse FAW First Shaft Assembly And Input Gear is a precision-balanced, high-strength assembly.
| Aplicação em veículos | FAW Jiefang CA4251P66K24T1A3E5 6×4 Trator |
| Grupo de Componentes | FAW First Shaft Assembly And Input Gear |
| Main Shaft P/N | 1701112-A7G (Input Shaft) |
| Main Gear P/N | 1701121-A0L (Input Gear) |
| Main Bearing P/N | 6212-ZNBR/C3YB2 (Rolamento de esfera de ranhura profunda) |
| Selo principal P/N | 1701135-A7G (Oil Seal) |
| Pilot Bushing P/N | 1701111-A7G |
| End-Play Control | Selective-fit Circlips (1701131/2/3/4-A7G) |
| Função Primária | To transmit 100% of engine torque from the clutch disc to the transmission’s counter-shaft. |
Peças FAW, incluindo o conjunto do bloco de cilindros, são embalados com cuidado para garantir uma entrega segura. Cada componente é protegido por materiais de proteção para evitar danos durante o transporte. A rede logística garante envios pontuais em todo o mundo, apoiando operações de manutenção eficientes. Abaixo está uma imagem ilustrando a embalagem padrão para peças de caminhão FAW, mostrando a atenção aos detalhes no manuseio e armazenamento.
Esta abordagem de embalagem minimiza o risco de corrosão ou danos por impacto, garantindo que peças como o conjunto do bloco de cilindros FAW cheguem em perfeitas condições. Os clientes podem confiar na logística da FAW para obter qualidade e confiabilidade consistentes.
FAW é um dos maiores e mais antigos fabricantes automotivos da China, com capital social de RMB 35.4 bilhões de yuans e ativos totais de RMB 457.83 bilhão de yuans.
CHINA FAW GRUPO CO., LTDA. (abreviação de FAW), anteriormente China First Automobile Works, pode traçar suas raízes até julho 15, 1953, quando sua primeira montadora começou a ser construída. FAW é um dos maiores e mais antigos fabricantes automotivos da China, com capital social de RMB 35.4 bilhões de yuans e ativos totais de RMB 457.83 bilhão de yuans.
Vendas globais de caminhões pesados na China “cinco seguidas”, vendas de caminhões pesados em todo o mundo “seis seguidas”, vendas de tratores para 16 anos consecutivos líder absoluto na indústria.
