- Ciudad de ChangChun, Provincia de Jilin, Porcelana
por 
Welcome to this comprehensive technical analysis of the Componente del conjunto del eje central de la caja principal FAW, the complete counter-shaft gear cluster for the FAW Jiefang CA4251P66K24T1A3E5 6×4 tractor semirremolque diésel. This assembly is the literal “workhorse” inside the transmission.
El Componente del conjunto del eje central de la caja principal FAW (also known as the counter-shaft) is responsible for taking the single input speed from the engine’s clutch and “splitting” it into multiple gear ratios. It is in constant mesh with the input shaft and the main shaft, manejo 100% of the engine’s torque.
This in-depth guide is an essential resource for professional transmission rebuilders and parts specialists. Deconstruiremos todo Componente del conjunto del eje central de la caja principal FAW en su 16 piezas reparables, including the main shaft, all drive gears, the critical bearings, and the hardware that holds it all in perfect alignment.
La columna vertebral de la Componente del conjunto del eje central de la caja principal FAW is the ‘Countershaft’ (1701211-A9P) sí mismo. Este es un solo, massive, forged component made from high-carbon, case-hardened steel. It is designed to be the primary torque-bearing shaft in the transmission.
Its function is to “counter” the rotation of the input shaft. The input shaft’s gear (1701121-A0L, from the previous assembly) is in constant, permanent mesh with one of the gears on this Componente del conjunto del eje central de la caja principal FAW. This means that any time the clutch is engaged and the engine is spinning, this countershaft is also spinning.
The shaft itself is precision-machined with multiple “steps,” splines, and bearing journals. The splines are used to mount the various drive gears, while the journals provide a mirror-smooth, ultra-hard surface for the main roller bearings to ride on. A bent or twisted countershaft is a catastrophic failure that requires a full transmission rebuild, making the integrity of this core Componente del conjunto del eje central de la caja principal FAW absolutely critical.
El “lógica” del Componente del conjunto del eje central de la caja principal FAW is embodied in its drive gears. This parts list details the main set of constant-mesh gears:
Estos son los “drive” engranajes. They are fixed (splined or press-fit) to the countershaft and are *always* spinning at the same speed as the countershaft. They are in permanent, constant mesh with their corresponding “driven” engranajes, which spin freely on the main shaft. When the driver selects “3rd gear,” they are actually engaging a clutch (a “synchronizer”) that locks the *freewheeling 3rd gear* to the main shaft. The power flow is then from the input gear, hacia Componente del conjunto del eje central de la caja principal FAW, through this ‘3rd gear-countershaft’ (1701212-A9K), to the main shaft, and out to the wheels.
These gears are “helically cut” (with angled teeth). This is a critical design choice for a heavy-duty Componente del conjunto del eje central de la caja principal FAW. The angled teeth engage gradually and smoothly, which is far quieter than “corte recto” spur gears. This design also allows for more than one tooth to be in contact at any given time, spreading the immense torque load over a wider surface area and providing superior strength.
The ‘Reduction gear-countershaft’ (1701217-A0L) is another critical drive gear within the Componente del conjunto del eje central de la caja principal FAW. This is typically the “bajo” o “creeper” engranaje, providing the maximum torque multiplication for starting the truck from a dead stop, especially on a hill.
This gear must be precisely located on the shaft. This is the job of the ‘Spacer’ (1701247-A7K) and the ‘Circlip-reduction gear’ (1701229-A7G). The spacer is a hardened steel sleeve that provides the correct “stand-off” distance from the other gears, while the circlip (a “snap ring”) fits into a groove on the shaft to lock the gear in its final fore-and-aft position.
Este Componente del conjunto del eje central de la caja principal FAW is held together by various keys, including the ‘Woodruff Key’ (1701226-A7G) and ‘Flat Key’ (1701228-A7G). These small steel parts sit in a slot on the shaft and a corresponding slot in the gear, physically locking the two together to transfer all rotational torque. The ‘Spring Dowel Pin’ (Q5280510) is also used to pin one of the components, like the spacer, en su lugar.
todo el Componente del conjunto del eje central de la caja principal FAW spins at engine speed, supported at both ends by massive bearings that are pressed into the transmission housing.
**Front Bearing (NU309NRB1/YA6):** This is the ‘Cylindrical roller bearing with stop ring’. This heavy-duty roller bearing supports the front of the countershaft. It is designed to handle extreme *radial* loads (the separating force from the gears). El “stop ring” (a circlip on its outer race) es critico, as it locks the bearing into the transmission case, setting the “juego final” para todo Componente del conjunto del eje central de la caja principal FAW.
**Rear Bearing (1701235-A9P):** This is the ‘Cylindrical roller bearing’ that supports the rear of the shaft. It sits in a precision-bored hole in the mid-housing.
**Baffles (1701233-A7G / 1701233-A9P):** These bearings are protected by the ‘Baffle-countershaft front bearing’ and ‘Baffle-countershaft rear bearing’. Estos son “slinger” discs. As the transmission’s gear oil is violently splashed around, these baffles, which spin with the shaft, sling the oil *away* from the bearing seals. This prevents them from being overwhelmed and failing, which would allow the gear oil to leak out and the bearing to run dry. This is a critical durability feature of the Componente del conjunto del eje central de la caja principal FAW, and these baffles are secured by the ‘Hex head bolts’ (CQ1511645S, CQ1511235S).
La siguiente tabla proporciona la información completa, desglose detallado de todos 16 components identified in the ‘Main Box Centre Shaft Assembly Component’ diagrama para el tractor FAW CA4251P66K24T1A3E5. The proper assembly of this Componente del conjunto del eje central de la caja principal FAW is key to a quiet, reliable transmission.
| Marca | Número de pieza. | Nombre de la pieza | Cantidad |
|---|---|---|---|
| 1 | 1701233-A9P | Deflector – countershaft rear bearing | 1 |
| 2 | 1701235-A9P | Cylindrical roller bearing | 1 |
| 3 | 1701211-A9P | Eje secundario | 1 |
| 4 | 1701226-A7G | Woodruff key | 1 |
| 5 | Q5280510 | Spring dowel pin | 1 |
| 6 | 1701228-A7G | Flat key | 1 |
| 7 | 1701212-A9K | 3rd gear-countershaft | 1 |
| 8 | 1701213-A9K | 4th gear-countershaft | 1 |
| 9 | 1701214-A1K | 5th gear-countershaft | 1 |
| 10 | 1701247-A7K | Espaciador | 1 |
| 11 | 1701217-A0L | Reduction gear-countershaft | 1 |
| 12 | 1701229-A7G | Circlip-reduction gear | 1 |
| 13 | NU309NRB1/YA6 | Cylindrical roller bearing with stop ring | 1 |
| 14 | 1701233-A7G | Baffle-countershaft front bearing | 1 |
| 15 | CQ1511645S | Perno de cabeza hexagonal | 1 |
| 16 | CQ1511235S | Perno de cabeza hexagonal | 1 |
Las especificaciones para el Componente del conjunto del eje central de la caja principal FAW are defined by its function as the core, torque-handling gear cluster of the transmission. todo el Componente del conjunto del eje central de la caja principal FAW is a precision-balanced and matched set.
| Solicitud de vehículo | FAW Jiefang CA4251P66K24T1A3E5 6×4 Tractor |
| Grupo de componentes | Componente del conjunto del eje central de la caja principal FAW |
| Nombre común | Countershaft Assembly / Eje intermedio |
| Main Shaft P/N | 1701211-A9P |
| Gear Set | 3rd (A9K), 4th (A9K), 5th (A1K), Reducción (A0L) |
| Gear Type | Constant-Mesh, Helical-Cut |
| Front Bearing P/N | NU309NRB1/YA6 (Roller Bearing w/ Stop Ring) |
| Rear Bearing P/N | 1701235-A9P (Cylindrical Roller Bearing) |
| Bearing Protection | Frente (A7G) & Trasero (A9P) Baffles |
| Función primaria | To receive input torque and create multiple gear ratios by driving the main shaft gears. |
piezas FAW, incluido el conjunto del bloque de cilindros, Se empaquetan con cuidado para garantizar una entrega segura.. Cada componente está asegurado con materiales protectores para evitar daños durante el transporte.. La red logística garantiza envíos puntuales en todo el mundo., apoyando operaciones de mantenimiento eficientes. A continuación se muestra una imagen que ilustra el embalaje estándar de las piezas de camiones FAW., mostrando la atención al detalle en el manejo y almacenamiento.
Este enfoque de embalaje minimiza el riesgo de corrosión o daños por impacto., asegurando que piezas como el conjunto de bloque de cilindros FAW lleguen en perfectas condiciones. Los clientes pueden confiar en la logística de FAW para obtener calidad y confiabilidad constantes.
FAW es uno de los fabricantes de automóviles más grandes y antiguos de China, con capital registrado de RMB 35.4 mil millones de yuanes y activos totales de RMB 457.83 mil millones de yuanes.
CHINA FAW GROUP CO., LIMITADO. (abreviatura de FAW), anteriormente China First Automobile Works, puede rastrear sus raíces hasta julio 15, 1953, cuando comenzó a construirse su primera planta de ensamblaje. FAW es uno de los fabricantes de automóviles más grandes y antiguos de China, con capital registrado de RMB 35.4 mil millones de yuanes y activos totales de RMB 457.83 mil millones de yuanes.
Ventas globales de camiones pesados en China “cinco seguidos”, ventas de camiones pesados a nivel mundial “seis seguidos”, venta de tractores para 16 años consecutivos líder absoluto en la industria.
