Conjunto del eje central inferior derecho FAW de la subcaja: dentro de su 4 Componentes críticos

Bienvenido a esta guía técnica crítica sobre la Conjunto del eje central inferior derecho FAW de la subcaja. Este es un completo, load-bearing gear and shaft set for the auxiliary “subcuadro” (o cuadro de rango) de la transmision, Diseñado para FAW Jiefang CA4251P66K24T1A3E5 6×4 tractor semirremolque diésel.

El Conjunto del eje central inferior derecho FAW de la subcaja (Número de pieza. 1701515FA0L) es el “eje secundario” for the transmission’s High/Low range selector. In the heavy-duty twin-countershaft design of this gearbox, this shaft is one of two (a matched “upper” y “más bajo” colocar) that splits the engine’s torque, providing immense durability.

Esta guía detallada es un recurso esencial para técnicos profesionales de transmisiones y especialistas en repuestos.. Deconstruiremos todo Conjunto del eje central inferior derecho FAW de la subcaja en su 4 componentes reparables, including the main ‘Welded countershaft assembly’, its precision ‘Tapered roller bearings’, and the critical ‘Locating washer’ for setting preload. La integridad de la Conjunto del eje central inferior derecho FAW de la subcaja es primordial.

Componente central: Contraeje soldado (1701515FA0L)

El corazón de la Conjunto del eje central inferior derecho FAW de la subcaja es la "caja secundaria del conjunto del contraeje soldado’ (1701515FA0L). This is the main shaft and gear cluster for the auxiliary transmission. This transmission uses a **twin-countershaft** (o “doble eje”) sub-box design. This means the load from the main box is split 50/50 between two shafts: este Conjunto del eje central inferior derecho FAW de la subcaja (el “abajo a la derecha”) y su “left upper” mellizo.

Este “torque-splitting” design is the hallmark of a heavy-duty transmission. It allows the gearbox to handle the immense torque of a diesel engine using more compact components, as the load on each gear tooth is effectively halved. El “Conjunto soldado” la designación es crítica: it means the drive gears for the high/low range are permanently friction-welded to the shaft, creando un solo, non-serviceable component of incredible strength. Este Conjunto del eje central inferior derecho FAW de la subcaja is forged from high-manganese steel and case-hardened. A failure of a gear tooth requires the replacement of the entire Conjunto del eje central inferior derecho FAW de la subcaja.

El sistema de rodamientos: Rodamientos de rodillos cónicos (33109-1 & 33109-2)

Cada Conjunto del eje central inferior derecho FAW de la subcaja is supported at its front and rear by a heavy-duty tapered roller bearing. The parts list correctly breaks this bearing (Tipo 33109) into its two serviceable components:

• **’Outer ring-tapered roller bearing’ (33109-1):** Quantity of 2. Este es el “taza,” which is pressed into the transmission’s housing.
• **’Inner ring-tapered roller bearing’ (33109-2):** Quantity of 2. Este es el “cono” (which contains the rollers), and it is pressed onto the journals of the Conjunto del eje central inferior derecho FAW de la subcaja.

The quantities of 2 each are for *this specific shaft* (one for the front, one for the rear). The *total* for the entire sub-box would be double this, as seen in the “Superior izquierdo” shaft assembly.

Los rodamientos de rodillos cónicos son esenciales para esta aplicación.. The helical (angular) gear teeth on the Conjunto del eje central inferior derecho FAW de la subcaja create immense **axial load** (empuje, or a constant push/pull force) in addition to the **radial load** (the separating force). A standard ball bearing would be quickly destroyed by this axial thrust. Tapered bearings are specifically engineered to handle both forces at once, which is critical for the long-term survival of the Conjunto del eje central inferior derecho FAW de la subcaja.

Lógica de precisión: La lavadora de localización (1701518-A0L) y precarga

El componente final del Conjunto del eje central inferior derecho FAW de la subcaja is the ‘Locating washer’ (1701518-A0L). The parts list shows a quantity of one, as this specific shaft (el “abajo a la derecha”) is the one that is “shimmed” to set the preload for the entire twin-shaft assembly. Esta no es una simple lavadora.; es una **cuña de precisión**.

This shim’s “lógica” is to set the **bearing preload**. This is the single most critical step in a transmission rebuild. Tapered roller bearings cannot be simply installed; they must be “squeezed” together with a precise, pre-calculated amount of force.

* **If the preload is too loose** (shim is too thin), el Conjunto del eje central inferior derecho FAW de la subcaja tendrá “juego final,” permitiéndole moverse hacia adelante y hacia atrás. This misalignment causes the helical gear teeth to mesh improperly, conduciendo a un fuerte, agudo “gimoteo,” vibración, and eventual gear tooth failure.

* **If the preload is too tight** (shim is too thick), the bearings are “crushed” together and have no running clearance. This creates immense friction, which overheats, “blues,” and seizes the bearings, destruyendo el Conjunto del eje central inferior derecho FAW de la subcaja.

Durante el montaje, a technician must install the shaft, measure the end-play with a dial indicator, and then select a ‘Locating washer’ of the *exact* required thickness from a “ajuste selectivo” colocar (all under the 1701518 part number family). Esto asegura la Conjunto del eje central inferior derecho FAW de la subcaja spins freely with zero end-play, guaranteeing a quiet and long-lasting repair.

Service and Failure Diagnostics

Un fracaso dentro del Conjunto del eje central inferior derecho FAW de la subcaja is a major internal transmission fault. The primary cause is almost always lubrication failure (low or contaminated oil) or an incorrect preload setting during a previous repair.

The main symptom of a failing Conjunto del eje central inferior derecho FAW de la subcaja bearing is a loud, constant **whining or growling noise** that is tied to vehicle speed, not engine RPM. The noise will be present in all gears (1-12) and will change in pitch only as the truck speeds up or slows down. This is because the auxiliary sub-box is “río abajo” of the main box, and its shafts are always spinning in relation to the driveshaft speed.

una secundaria, critical failure mode in a twin-countershaft design is **gear timing**. The two shafts (este Conjunto del eje central inferior derecho FAW de la subcaja and its twin) debe ser “cronometrado” so their helical gear teeth engage the main shaft at the exact same instant. If one shaft is “apagado” by a single tooth, the entire torque load will be placed on one shaft instead of being split 50/50. This will rapidly destroy the overloaded Conjunto del eje central inferior derecho FAW de la subcaja, stripping its gear teeth.

FAW Lower Right Centre Shaft Assembly Of The Sub-Box Parts List

La siguiente tabla proporciona la información completa, desglose detallado de todos 4 components identified in the ‘Sub-Box Lower Right Centre Shaft Assembly’ diagrama para el tractor FAW CA4251P66K24T1A3E5. Este Conjunto del eje central inferior derecho FAW de la subcaja is one of two matching sets in the auxiliary box.

Especificaciones técnicas y contexto de montaje.

Las especificaciones para el Conjunto del eje central inferior derecho FAW de la subcaja are defined by its function as one half of a high-torque, sistema de doble contraeje. todo el Conjunto del eje central inferior derecho FAW de la subcaja El juego debe instalarse con precarga de precisión..