Реверс-редуктор FAW в сборе: Критический фокус на 5 Обслуживаемые детали

Добро пожаловать в это важное техническое руководство по Реверс-редуктор FAW в сборе, полный “бездельник” gearset for the manual transmission in the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This assembly is solely responsible for enabling the vehicle to move backward.

The Реверс-редуктор FAW в сборе is a high-strength gear system with a simple but critical logic. It is not in constant mesh with the main gearset. Вместо, it is a separate “бездельник” gear that is physically moved into place by the driver’s shift linkage, intentionally reversing the flow of power to the main shaft.

Это подробное руководство является важным ресурсом для профессиональных специалистов по трансмиссиям и специалистов по запчастям.. Мы разберем всю Реверс-редуктор FAW в сборе в свой 5 исправные компоненты, including the ‘Reverse idler gear’ (1701481-A7G), the ‘Idler shaft’ (1701482-А0Л), its ‘Needle roller bearing’, and all critical locating hardware.

Основной компонент: The ‘Reverse Idler Gear’ (1701481-A7G)

Сердце Реверс-редуктор FAW в сборе is the ‘Reverse idler gear’ (1701481-A7G). Это тяжелая работа, forged steel gear that is precisely engineered to handle the high-torque, low-speed demands of moving a fully-loaded tractor in reverse.

Unlike the helical-cut (угловой) gears used for forward motion (which are quiet and smooth), this gear is typically a “стимулировать” механизм, with straight-cut teeth. This straight-cut design is mechanically simpler and incredibly strong, able to withstand the high shock-load of being “slid” into mesh. This is what produces the characteristic “ныть” sound when driving in reverse.

When the driver selects reverse, a shift fork slides this ‘Reverse idler gear’ into a very specific position: *between* the counter-shaft’s reverse drive gear and the main shaft’s reverse synchronizer sleeve. Это “логика” принадлежащий Реверс-редуктор FAW в сборе. By introducing a third gear into the power path (Counter-shaft -> Idler Gear -> Главный вал), it reverses the direction of the main shaft, causing the truck to move backward.

The teeth on this gear must be perfectly formed and hardened. A chipped or broken tooth on this single gear will make reverse inoperable and will send hardened steel fragments throughout the entire transmission, destroying other gears and bearings. This makes the quality of the Реверс-редуктор FAW в сборе‘s main gear critical.

Фонд: The ‘Idler shaft’ (1701482-А0Л)

«Реверс промежуточной шестерни»’ does not float; it spins on the ‘Idler shaft’ (1701482-А0Л). This is the stationary “ось” на весь Реверс-редуктор FAW в сборе. This shaft is a large-diameter, прецизионная шлифовка, and case-hardened steel rod.

This shaft is mounted securely (often press-fit or bolted) into the transmission housing. It must be perfectly parallel to the main shaft and counter-shaft to ensure that when the idler gear slides into mesh, the gear teeth are perfectly aligned.

Any wear, подсчет очков, or bending on this shaft is a critical failure. If the shaft is worn, the idler gear will be able to “колебаться” on its axis. This wobble will cause a loud, growling noise in reverse and, more dangerously, will prevent the gear teeth from meshing correctly. This can cause the gear to “pop out” under load or, в худшем случае, shatter the gear teeth. The ‘Idler shaft’ is the rigid foundation of the Реверс-редуктор FAW в сборе.

Low-Friction Support: Подшипник (1701485-A7G)

«Реверс промежуточной шестерни»’ (1701481-A7G) must be able to spin freely on the ‘Idler shaft’ with minimal friction. This is the job of the ‘Needle roller bearing’ (1701485-A7G). This is the key “антифрикционный” компонент Реверс-редуктор FAW в сборе.

This bearing is a “caged” set of small-diameter steel rollers (needles). It is pressed into the bore of the idler gear. This design is chosen for its extremely high **radial load capacity** in a very compact space. It allows the gear to support the immense separating forces created when the gear teeth are under torque.

This bearing is lubricated by the transmission’s “всплеск” oiling system. A failure of this bearing is a common fault in a high-mileage Реверс-редуктор FAW в сборе. It is typically diagnosed as a loud, пронзительный “ныть” или “гул” that only occurs when the truck is in reverse (either moving or stationary with the clutch out). If this bearing collapses, the gear will seize to the shaft or be destroyed, resulting in a total loss of reverse.

Выравнивание & Безопасность: Шайбы (1701487-A7G) и Circlip (1701488-A7G)

The final two components of the Реверс-редуктор FAW в сборе are responsible for “окончание игры” control and security.

**’Gasket/Washer – промежуточная шестерня заднего хода’ (1701487-A7G):** В списке запчастей указано два из них.. These are not “прокладки”; they are **thrust washers**. These are hardened, прецизионная шлифовка, and polished steel washers that are placed on either side of the idler gear (between the gear and the transmission case/circlip). Their job is to absorb the **axial load** (the fore-and-aft force) that is generated as the gear is slid into mesh. They provide a low-friction, сменная изнашиваемая поверхность. Worn-out thrust washers are a primary cause of a “небрежный” shifter feel or a transmission that “jumps” out of reverse.

**’Circlip – reverse idler shaft’ (1701488-A7G):** This is the final retaining component. Этот большой “стопорное кольцо” (circlip) is fitted into a groove cut into the ‘Idler shaft’. It acts as the final “жесткая остановка,” preventing the entire assembly (the gear, несущий, and thrust washers) from sliding off the end of the shaft. It is a single-use part; a fatigued circlip that is re-used can fail, allowing the entire Реверс-редуктор FAW в сборе to fall apart inside the transmission.

FAW Reverse Gear Assembly Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 5 components identified in the ‘Reverse Gear Assembly’ схема трактора FAW CA4251P66K24T1A3E5. Реконструкция Реверс-редуктор FAW в сборе requires replacing all bearings, шайбы, и цирки.

Технические характеристики и контекст сборки

Технические характеристики Реверс-редуктор FAW в сборе определяются своей функцией как высокомоментный, sliding-mesh idler gear system. Весь Реверс-редуктор FAW в сборе is a matched set of components.