- Чанчунь город, Провинция Цзилинь, Китай
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Добро пожаловать в это важное техническое руководство по FAW One-Shaft Assembly (also known as the transmission input shaft). This is a core component group for the manual transmission in the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This assembly is the primary torque-input for the entire gearbox.
The FAW One-Shaft Assembly is the bridge between the engine’s clutch and the transmission’s gearset. Its splined “nose” receives 100% of the engine’s power from the clutch disc, and its “input gear” (1701121-A7G) transfers that power to the counter-shaft, setting the entire gear train in motion.
This in-depth guide is an essential resource for professional transmission technicians and parts specialists. Мы разберем всю FAW One-Shaft Assembly в свой 8 исправные компоненты, including the main shaft, the ‘Input gear’, the main bearing, and the critical seals and circlips that ensure its precise alignment.
В сердце FAW One-Shaft Assembly are its two namesake components. The ‘First shaft – transmission’ (1701112-A7G) is the main input shaft. It is a single, robust component forged from high-carbon steel, precision-ground, and case-hardened. Its front section, или “nose,” is precision-cut with splines. These splines slide into the hub of the clutch disc, creating the mechanical lock that receives the engine’s power.
The ‘Input gear – первый вал’ (1701121-A7G) is the main drive gear for the entire gearbox. It is fixed (splined or press-fit) onto the rear of the ‘First shaft’. This gear is in permanent, constant mesh with the main counter-shaft gear. Этот “constant mesh” design is the foundation of a heavy-duty transmission. When the engine is on and the clutch is engaged, this gear is always spinning and driving the counter-shaft. A chipped tooth on this gear, often from a severe driveline shock, is a catastrophic failure for the FAW One-Shaft Assembly.
The helical (angled) cut of the gear teeth is a critical design feature. It allows the teeth to engage gradually, which is significantly quieter than “spur” (straight-cut) шестерни. This design also allows 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 for the FAW One-Shaft Assembly.
Весь FAW One-Shaft Assembly is supported and located by the ‘Deep groove ball bearing with stop ring’ (1701105-A2V-C00). This is the main bearing for the input shaft. Это большой, heavy-duty ball bearing that is pressed onto the ‘First shaft’ (1701112-A7G). Its outer race is then secured in a precision bore in the transmission’s ‘Front Housing Assembly’ (bell housing).
A deep-groove ball bearing is used here because it is exceptionally good at handling **Radial Loads** (the sideways force from the helical gear mesh). It is also capable of handling the **Axial Loads** (а “толкать/тянуть” сила) that are transmitted to the FAW One-Shaft Assembly every time the driver presses the clutch pedal.
The “stop ring” (или “snap ring”) on the bearing’s outer race is a critical feature. This ring fits into a groove in the transmission housing, locking the bearing (and thus the entire FAW One-Shaft Assembly) in its precise fore-and-aft position. This is a vital function for maintaining the perfect gear mesh inside the transmission. A failing bearing here will be heard as a “whine” или “rumble” when the clutch is engaged in neutral.
This module details the two most critical “уплотнение” components of the FAW One-Shaft Assembly, which are responsible for connecting it to the rest of the transmission and protecting it from leaks.
**1. The ‘Bushing’ (1701111-A7G):** Это “pilot bushing” for the transmission’s *main shaft* (или “второй вал”). The rear of the ‘First shaft’ (1701112-A7G) is hollowed out. The “nose” или “tip” of the transmission’s main shaft (the one with all the sliding gears) fits *inside* this hollowed-out section. This bronze bushing is pressed into this hole. It provides the front support for the entire main shaft, ensuring it is perfectly concentric with the FAW One-Shaft Assembly. A worn bushing here will cause the main shaft to “колебаться,” leading to vibration, grinding shifts, and can destroy the synchronizers. It’s a tiny, but vital, часть FAW One-Shaft Assembly.
**2. The ‘Oil seal – первый вал’ (1701135-A7G):** Это основной “input shaft seal.” It is a high-temperature, radial lip seal that is pressed into the front of the transmission’s bell housing. Its flexible, spring-loaded rubber lip rides on a polished journal of the ‘First shaft’. Its *only* job is to keep the transmission’s gear oil *inside* the transmission case.
A failure of this seal is a critical failure of the FAW One-Shaft Assembly система. It allows gear oil to leak forward into the *dry* clutch housing. This oil will immediately saturate the clutch friction disc, making it unable to grip the flywheel. The symptoms are severe clutch slip (engine revs, truck doesn’t move) and a total loss of power. This seal is a mandatory replacement item during any clutch or transmission service on the FAW One-Shaft Assembly.
The FAW One-Shaft Assembly requires incredibly precise “end-play” (the amount of in-and-out movement). This is controlled by a “selective fit” system of circlips and a gasket.
The ‘Circlip – Первый вал задний подшипник’ (1701131-A7G) and its three listed sub-parts (1701132-A7G, 1701133-A7G, 1701134-A7G) are the core of this system. This is not one part, but a *set* of circlips of minutely different thicknesses.
During a rebuild, a technician measures the “end-play” and then selects the *one* correct-thickness circlip from this set that will set the bearing “preload” to the perfect factory specification. The ‘Gasket – Первый вал задний подшипник’ (1701123-A7G) is also part of this calculation, as its compressed thickness affects the final dimension.
Also listed is the ‘Circlip – задняя передача’ (1701314-A7G). This is a different part, used to locate the reverse idler gear on its own shaft (a component that meshes with the main gearset). This entire alignment system is critical to the logic of the FAW One-Shaft Assembly.
В следующей таблице представлена полная, подробная разбивка всех 8 primary components identified in the ‘One-Shaft Assembly’ (Входной вал) схема трактора FAW CA4251P66K24T1A3E5. A rebuild of the FAW One-Shaft Assembly requires careful selection of the correct circlips.
| Отметка | Часть №. | Наименование | Количество |
|---|---|---|---|
| 1 | 1701135-A7G | Oil seal – первый вал | 1 |
| 2 | 1701131-A7G | Circlip – Первый вал задний подшипник | 1 |
| 1701132-A7G | Circlip – Первый вал задний подшипник (See 1701131-A7G) | 1 | |
| 1701133-A7G | Circlip – Первый вал задний подшипник (See 1701131-A7G) | 1 | |
| 1701134-A7G | Circlip – Первый вал задний подшипник (See 1701131-A7G) | 1 | |
| 3 | 1701105-A2V-C00 | Deep groove ball bearing with stop ring | 1 |
| 4 | 1701123-A7G | Прокладка – Первый вал задний подшипник | 1 |
| 5 | 1701314-A7G | Circlip – задняя передача | 1 |
| 6 | 1701112-A7G | First shaft – transmission | 1 |
| 7 | 1701111-A7G | Втулка | 1 |
| 8 | 1701121-A7G | Input gear – первый вал | 1 |
Технические характеристики FAW One-Shaft Assembly are defined by its function as the primary torque input for the transmission. Этот FAW One-Shaft Assembly is a precision-balanced, high-strength assembly.
| Приложение для автомобиля | FAW Цзефан CA4251P66K24T1A3E5 6×4 Трактор |
| Группа компонентов | FAW One-Shaft Assembly |
| Общее имя | Transmission Input Shaft Assembly |
| Main Shaft P/N | 1701112-A7G |
| Main Gear P/N | 1701121-A7G (Helical-Cut) |
| Main Bearing P/N | 1701105-A2V-C00 (Ball Bearing w/ Stop Ring) |
| Main Seal P/N | 1701135-A7G (Radial Oil Seal) |
| Pilot Bushing P/N | 1701111-A7G (For Main Shaft Nose) |
| End-Play Control | Selective-fit Circlips (1701131/2/3/4-A7G) & Прокладка (1701123-A7G) |
| Основная функция | To transmit 100% of engine torque from the clutch disc to the transmission’s counter-shaft. |
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.
