FAW Transmission Housing Assembly: Критический фокус на 37 Основные компоненты

Welcome to this critical, in-depth guide on the FAW Transmission Housing Assembly, the complete structural “скелет” for the gearbox in the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This is the foundation upon which the entire transmission is built.

The FAW Transmission Housing Assembly это не одна часть, but a set of precision-machined casings, including the ‘Front housing’ (1701015-A9p) and ‘Mid-housing’ (1701035-A9p). Its function is to contain the gear oil, protect all internal gears and shafts, and provide rigid mounting points to the engine and chassis.

This guide is an essential resource for professional transmission rebuilders, fleet technicians, и менеджеры по запчастям. Мы разберем всю FAW Transmission Housing Assembly в свой 37 исправные компоненты, including every cover, затыкать, прокладка, and fastener required for a complete overhaul.

Core Casings: Передний (1701015-A9p) & Mid (1701035-A9p)

The FAW Transmission Housing Assembly является а “two-piece” или “split-case” дизайн, consisting of two main structural components.

**1. Передний корпус (1701015-A9p):** This is the ‘Front housing with steel wire sleeve assy’. Это “bell housing” section of the FAW Transmission Housing Assembly. Its primary function is to connect the entire gearbox to the back of the engine’s flywheel housing. It also contains the clutch release mechanism (fork and bearing). The “steel wire sleeve” (НАПРИМЕР., Helicoil) designation is a high-quality feature, indicating that the aluminum casting has been reinforced with steel thread inserts for the high-torque mounting bolts, preventing stripping and ensuring durability.

**2. Mid-Housing (1701035-A9p):** This is the ‘Mid-housing with steel wire sleeve assy’. Это основной “gearbox,” the largest part of the FAW Transmission Housing Assembly. This heavily-ribbed casting (likely aluminum for light weight and heat dissipation) это “скелет” that holds all the critical, torque-bearing shafts: the main shaft, the counter-shaft, and the reverse idler shaft. Its internal, precision-bored “saddles” are where the main shaft bearings are seated.

These two halves of the FAW Transmission Housing Assembly are located with ‘Dowel pins’ (1701052-A9p, 1701037-A2K) and bolted together with numerous high-tensile ‘Hex flange bolts’ (Q1840820S, Q1841030S, и т. д.) to form a single, rigid, leak-proof unit.

Доступ & Inspection Covers

The FAW Transmission Housing Assembly is designed for serviceability. This is evident from its multiple access covers. The ‘Cover – upper left’ (1701037-A9p) and ‘Cover – внизу справа’ (1701043-A9p) являются “idler gear” covers. They seal the large holes in the casing that are necessary for the factory to assemble the counter-shaft and idler gear clusters. These covers are sealed with gaskets and secured with ‘Hex flange bolts’ (Q1841060S, Q1841065S).

Кроме того, the ‘Front housing’ (bell housing) features a ‘Cover – outer observation hole’ (1601042-A2K), which is sealed by a ‘Gasket’ (1601041-A2K). Этот маленький, removable plate is the “clutch inspection cover.” It allows a technician to use a light and a mirror to inspect the condition of the clutch friction disc, the pressure plate, and the release bearing, without having to remove the entire transmission. This is a critical diagnostic feature of the FAW Transmission Housing Assembly.

Lubrication System: Plugs and Sump

The FAW Transmission Housing Assembly is also a “отстойник” that holds several gallons of heavy-duty gear oil. This parts list details all the service points for this fluid.

**1. Filler Plugs:** The ‘Oil filler plug’ (1701042-A2K) является основным “fill” port, located high on the side of the FAW Transmission Housing Assembly. The transmission is filled until oil begins to weep from this hole, which is how the correct level is set.

**2. Сливная пробка:** The ‘Drain plug assy’ (1701765-A2K) is the service point for removing the old oil. This plug is located at the absolute lowest point of the FAW Transmission Housing Assembly. It is magnetic, designed to trap microscopic metal particles and provide a visual “health check” of the internal gears during an oil change. It is sealed with a ‘Gasket-plug, drain’ (1701042-A2K… *Correction*: 1701042-A2K is listed as filler plug and gasket, likely a typo in list, should be drain plug gasket 1701765-A2K’s sub-part).

**3. Oil Sump:** The ‘Oil sump assembly’ (1701025-A9p) is a bolted-on component at the bottom of the FAW Transmission Housing Assembly. This acts as the main oil reservoir, ensuring the oil pump pickup is always submerged.

Shaft Support: Bearing Caps and Bushings

The most critical function of the FAW Transmission Housing Assembly is to hold the input, main, and counter shafts in perfect, parallel alignment under thousands of pound-feet of torque. This is achieved by several key components.

The ‘End cap – intermediate shaft front bearing’ (1701028-A9p) is a heavy-duty cap that bolts to the front of the main housing, securing the “pocket bearing” of the counter-shaft. Сходным образом, the ‘Cover – Первый вал задний подшипник’ (1701141-A7G) and its ‘Gasket’ (1701142-A7G) seal and secure the main bearing on the transmission’s output shaft.

Этот FAW Transmission Housing Assembly also provides the mounting points for the shift-fork shafts. The ‘Bushing-shift fork shaft’ (1701013-A9p) and ‘Bushing-reverse idler shaft’ (1701014-A9p) являются “wear” surfaces. These bronze bushings are pressed into the case, providing a low-friction, replaceable surface for the hardened steel shift shafts to slide in.

FAW Transmission Housing Assembly Parts List (1/2)

В следующей таблице представлена ​​полная, подробная разбивка всех 37 components for the FAW Transmission Housing Assembly.

Технические характеристики и контекст сборки

Технические характеристики FAW Transmission Housing Assembly are defined by its function as the structural, precision-machined skeleton for a heavy-duty manual transmission. Весь FAW Transmission Housing Assembly is built for durability.