Средняя жилищная сборка FAW: Деконструкция 22 Комплексные компоненты

Welcome to this comprehensive technical deconstruction of the Средняя жилищная сборка FAW (Часть №. 1701035-A2V), также известный как “mid-case.” This is the central, structural skeleton of the main gearbox for the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач.

The Средняя жилищная сборка FAW is arguably the most critical and complex casing in the entire transmission. Its function is to hold the main shaft, counter-shaft, and reverse idler shaft in perfect, parallel alignment, all while containing the transmission’s oil supply and supporting the shift-rail mechanism.

This in-depth guide is an essential resource for professional transmission technicians and parts specialists. We will analyze all 22 serviceable components of the Средняя жилищная сборка FAW, including the main casing, its lubrication system (пробки, фильтры), the shift-fork bushings, and the critical reverse light switch.

Основной компонент: The Middle Housing (1701035-A2V)

The heart of this assembly is the ‘Mid-housing with steel wire sleeve set assy’ (1701035-A2V). Это основной корпус Средняя жилищная сборка FAW. Это масштабное, precision-machined casting, typically made of aluminum to save weight and effectively dissipate heat from the gear oil. Этот компонент является “скелет” that everything else bolts into.

Its most critical features are the internal, прецизионный “седла” или “bores.” These are the holes that hold the main bearings for the input shaft, main shaft, and counter-shaft. These bores must be perfectly parallel to each other, as any misalignment would cause the gears to mesh improperly, приводящие к катастрофическим последствиям “whine” and rapid gear destruction.

The designation “with steel wire sleeve set assy” is a critical quality feature. It means that the high-stress threaded holes in the soft aluminum casting of the Средняя жилищная сборка FAW have been reinforced with “Helicoils” (steel wire inserts). This is vital for the ‘Stud bolts’ (CQ1211640) and the many ‘Hex flange bolts’ (Q1841060S, Q1840820S) that hold the transmission together, preventing the threads from stripping during service and ensuring a high-torque, durable assembly. This is a core feature of a high-quality Средняя жилищная сборка FAW.

The Lubrication & Service System

The Средняя жилищная сборка FAW is designed to hold several gallons of heavy-duty gear oil. This parts list details all the critical service points for this fluid.

**1. Oil Fill/Check:** «Маслозаливная пробка’ (1701041-A2K) это “наполнять” порт, located high on the side of the housing. Трансмиссия заполняется до тех пор, пока из этого отверстия не начнет течь масло., which is how the correct oil level is set.

**2. Oil Drain:** «Сливная пробка в сборе’ (1701765-A2K) это “осушать” порт, located at the lowest point. This plug is typically magnetic, designed to trap any fine metal particles from normal gear wear. Inspecting this plug during an oil change is a critical diagnostic step for the health of the Средняя жилищная сборка FAW.

**3. Уплотнение:** Both plugs are sealed by the ‘Gasket-plug, осушать’ (1701042-A2K), из них два. Это “раздавить шайбы” and are single-use items that must be replaced to prevent leaks. The ‘Inner hex tapered screw plug’ (Q61901) is used to seal a manufacturing or diagnostic port on the Средняя жилищная сборка FAW.

Internal Oil Filtration (1701050-A2K)

A critical, yet simple, компонент Средняя жилищная сборка FAW‘s lubrication system is the ‘Filter screen assembly’ (1701050-A2K). Это “pickup screen” for the transmission’s internal oil pump. It is located deep inside the housing, submerged in the oil sump.

Its function is to provide a “грубый” фильтр, blocking any large debris (НАПРИМЕР., chipped gear teeth, metal shavings, or gasket fragments) from being sucked into the high-pressure oil pump. A failure of this screen would allow debris to circulate, destroying the oil pump and subsequently starving the entire gearbox of lubrication.

The ‘Gasket-filter screen assembly’ (1701056-A2K) is the seal for this component. Its integrity is vital, as a failed gasket would allow the pump to suck in unfiltered oil from *around* the screen, defeating its purpose. Это жизненно важная часть Средняя жилищная сборка FAW‘s longevity.

Shift System: Втулки, Булавки, and Switch

The Средняя жилищная сборка FAW provides the foundation for the internal shift components (detailed in Assembly 153). This includes the ‘Bushing-reverse fork shaft’ (1701014-A9p) and the three ‘Bushing-shift fork shaft’ (1701013-A9p) единицы. These are the bronze “носить” bushings that are pressed into the aluminum housing. The hardened steel shift rails slide through these bushings, allowing for smooth, low-friction shifting.

The ‘Dowel pin-sub housing’ (1701052-A2V) units are used to perfectly align the Средняя жилищная сборка FAW to the rear “дополнительный ящик” (вспомогательный) жилье.

A key electronic component mounted to this Средняя жилищная сборка FAW is the ‘Reverse light switch assembly’ (3729100-54W-C00). This is a spring-loaded “поршень” выключатель. When the driver moves the shifter into the reverse gate, the reverse shift rail (supported by 1701014-A9P) pushes this plunger in, which completes an electrical circuit. This signal turns on the vehicle’s white reversing lights and the audible backup alarm, making it a critical safety component.

FAW Middle Housing Assembly Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 22 components identified in the ‘Middle Housing Assembly’ схема трактора FAW CA4251P66K24T1A3E5. Этот Средняя жилищная сборка FAW is the core of the main gearbox.

Технические характеристики и контекст сборки

Технические характеристики Средняя жилищная сборка FAW определяются по своей функции как структурного, precision-machined “mid-case” передачи. Весь Средняя жилищная сборка FAW is a key structural component.