- Чанчунь город, Провинция Цзилинь, Китай
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Добро пожаловать в это важное техническое руководство по FAW Reverse Gear Assembly, полный “idler” 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 FAW Reverse Gear Assembly 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 “idler” gear that is physically moved into place by the driver’s shift linkage, intentionally reversing the flow of power to the main shaft.
This in-depth guide is an essential resource for professional transmission technicians and parts specialists. Мы разберем всю FAW Reverse Gear Assembly 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.
Сердце FAW Reverse Gear Assembly 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 (angled) gears used for forward motion (which are quiet and smooth), this gear is typically a “spur” 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 “whine” 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 FAW Reverse Gear Assembly. By introducing a third gear into the power path (Counter-shaft -> Idler Gear -> Main Shaft), 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 FAW Reverse Gear Assembly‘s main gear critical.
The ‘Reverse idler gear’ does not float; it spins on the ‘Idler shaft’ (1701482-А0Л). This is the stationary “ось” на весь FAW Reverse Gear Assembly. This shaft is a large-diameter, precision-ground, 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, in a worst-case scenario, shatter the gear teeth. The ‘Idler shaft’ is the rigid foundation of the FAW Reverse Gear Assembly.
The ‘Reverse idler gear’ (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 “anti-friction” компонент FAW Reverse Gear Assembly.
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 FAW Reverse Gear Assembly. It is typically diagnosed as a loud, пронзительный “whine” или “rumble” 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.
The final two components of the FAW Reverse Gear Assembly are responsible for “окончание игры” control and security.
**’Gasket/Washer – reverse idler gear’ (1701487-A7G):** В списке запчастей указано два из них.. These are not “прокладки”; they are **thrust washers**. These are hardened, precision-ground, 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, replaceable wear surface. 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 “snap ring” (circlip) is fitted into a groove cut into the ‘Idler shaft’. It acts as the final “hard stop,” 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 FAW Reverse Gear Assembly to fall apart inside the transmission.
В следующей таблице представлена полная, подробная разбивка всех 5 components identified in the ‘Reverse Gear Assembly’ схема трактора FAW CA4251P66K24T1A3E5. A rebuild of the FAW Reverse Gear Assembly requires replacing all bearings, washers, и цирки.
| Отметка | Часть №. | Наименование | Количество |
|---|---|---|---|
| 1 | 1701488-A7G | Circlip – reverse idler shaft | 1 |
| 2 | 1701487-A7G | Gasket/Washer – reverse idler gear | 2 |
| 3 | 1701482-А0Л | Натяжной вал | 1 |
| 4 | 1701485-A7G | Needle roller bearing | 1 |
| 5 | 1701481-A7G | Reverse idler gear | 1 |
Технические характеристики FAW Reverse Gear Assembly определяются своей функцией как высокомоментный, sliding-mesh idler gear system. Весь FAW Reverse Gear Assembly is a matched set of components.
| Приложение для автомобиля | FAW Цзефан CA4251P66K24T1A3E5 6×4 Трактор |
| Группа компонентов | FAW Reverse Gear Assembly |
| Main Gear P/N | 1701481-A7G (Reverse idler gear) |
| Main Shaft P/N | 1701482-А0Л (Натяжной вал) |
| Тип подшипника | 1x Needle roller bearing (1701485-A7G) |
| Gear Type | Spur-Cut (Straight-Cut) Idler Gear |
| Метод срабатывания | Sliding-Mesh (via Shift Fork) |
| Управление тягой | 2x Thrust Washers (1701487-A7G) |
| Security Fastener | 1x Circlip (1701488-A7G) |
| Основная функция | To be inserted between the counter-shaft and main shaft, reversing the direction of power flow. |
Запчасти ФАВ, включая блок цилиндров в сборе, тщательно упакованы, чтобы обеспечить безопасную доставку. Каждый компонент закреплен защитными материалами для предотвращения повреждений при транспортировке.. Логистическая сеть гарантирует своевременную доставку по всему миру., поддержка эффективных операций по техническому обслуживанию. Ниже приведено изображение, иллюстрирующее стандартную упаковку запчастей для грузовиков FAW., демонстрация внимания к деталям в обращении и хранении.
Такой подход к упаковке сводит к минимуму риск коррозии или ударного повреждения., обеспечение доставки таких деталей, как блок цилиндров FAW в сборе, в идеальном состоянии.. Клиенты могут положиться на логистику FAW для обеспечения стабильного качества и надежности..
FAW — один из старейших и крупнейших производителей автомобилей в Китае., с уставным капиталом в юанях 35.4 млрд юаней и общие активы юаней 457.83 миллиард юаней.
КИТАЙСКАЯ ГРУППА FAW CO., ООО. (сокращение от FAW), бывший Китайский первый автомобильный завод, можно проследить его корни до июля 15, 1953, когда началось строительство первого сборочного завода. FAW — один из старейших и крупнейших производителей автомобилей в Китае., с уставным капиталом в юанях 35.4 млрд юаней и общие активы юаней 457.83 миллиард юаней.
Продажи тяжелых грузовиков в Китае по всему миру “пять подряд”, продажи тяжелых грузовиков по всему миру “шесть подряд”, продажа тракторов для 16 годы подряд абсолютный лидер отрасли.
