Выходной вал дополнительного блока FAW в сборе: Почему эти 14 Критические детали определяют производительность трансмиссии

Добро пожаловать в это важное техническое руководство по Выходной вал дополнительного блока FAW в сборе. Это полный “final drive” assembly within the auxiliary “дополнительный ящик” of the manual transmission, designed for the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач.

The Выходной вал дополнительного блока FAW в сборе is the final link in the chain of torque multiplication. It receives power from the main box and the sub-box countershaft, and its “логика” 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.

This in-depth guide is an essential resource for professional transmission technicians and parts specialists. Мы разберем всю Выходной вал дополнительного блока FAW в сборе в свой 14 исправные компоненты, including the main shaft, the ‘Low gear’ and ‘High gear’ synchronizer hubs, the main bearing, and the final output flange.

Основной компонент: The Output Shaft (1701541-A7G)

The backbone of the Выходной вал дополнительного блока FAW в сборе is the ‘Output shaft-sub box’ (1701541-A7G). Это сингл, massive, forged component made from high-strength, case-hardened steel. It is the final output shaft of the entire transmission system.

This shaft is precision-machined with multiple splined sections and bearing journals. Его “nose” или “tip” 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 “логика” hubs. They are designed to hold the “sliding sleeves” of the range synchronizer, which are the components that lock either the “Высокий” или “Низкий” 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 Выходной вал дополнительного блока FAW в сборе is a catastrophic failure.

The “Диапазон” Логика: High and Low Gear Synchronizers

The core “логика” принадлежащий Выходной вал дополнительного блока FAW в сборе is the 2-speed range selector. Это сингл, large synchronizer assembly that provides two speeds: “Низкий” (a reduction gear) и “Высокий” (direct drive).

**1. Low Range:** The ‘Low gear-sub box’ (1701542FA0L) является основным “управляемый” gear for the low range. It is in constant mesh with the counter-shaft. When the driver selects “Низкий,” the ‘Sliding sleeve-sub box synchronizer’ (1701561FA0L) is moved (by a shift fork) to engage its “зубы собаки” 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) provides the “Высокий” скорость. This is typically a “direct drive” 1:1 соотношение. When the driver selects “Высокий,” 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 “вход” to this sub-box). This action “locks” the main shaft and the output shaft together, causing them to spin at the same speed (1:1 соотношение), bypassing the reduction gears entirely.

This entire High/Low clutch is a single unit on the Выходной вал дополнительного блока FAW в сборе, comprised of the ‘Sliding sleeve’, the ‘High gear’ hub, and the ‘Low gear’. The ‘Spring-sub box synchronizer [outer]’ (1701558-A7G) units are the “detent” springs that provide the “feel” and holding power for the synchronizer keys. The Выходной вал дополнительного блока FAW в сборе‘s function is defined by this clutch.

The Output End: Несущий, Фланец, and Speedometer

The rear of the Выходной вал дополнительного блока FAW в сборе is where power is delivered to the truck and where speed is measured.

**Main Bearing (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 (thrust) loads of the driveshaft pushing and pulling on the transmission. This is a non-negotiable, heavy-duty component of the Выходной вал дополнительного блока FAW в сборе.

**Выходной фланец (1701616-A7G):** The ‘Output flange’ is the final piece. This heavy, 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) это “водить машину” gear for the speedometer. It is pressed onto the ‘Output shaft’. As the shaft spins, this gear (часто называемый “tone ring”) 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.

Окончательно, 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, вода, и мусор. This small part is critical to the long-term, leak-free operation of the Выходной вал дополнительного блока FAW в сборе.

FAW Sub-Box Output Shaft Assembly Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 14 components identified in the ‘Sub-Box Output Shaft Assembly’ схема трактора FAW CA4251P66K24T1A3E5. A rebuild of the Выходной вал дополнительного блока FAW в сборе requires careful attention to the synchronizer components.

Технические характеристики и контекст сборки

Технические характеристики Выходной вал дополнительного блока FAW в сборе are defined by its function as the final, range-shifting output of the transmission. Весь Выходной вал дополнительного блока FAW в сборе is a precision-balanced set.