جمعية الإسكان الأوسط FAW: تفكيك 22 مكونات شاملة

Welcome to this comprehensive technical deconstruction of the جمعية الإسكان الأوسط FAW (الجزء لا. 1701035-A2V), المعروف أيضا باسم “mid-case.” This is the central, structural skeleton of the main gearbox for the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل.

ال جمعية الإسكان الأوسط FAW is arguably the most critical and complex casing in the entire transmission. Its function is to hold the main shaft, رمح مكافحة, and reverse idler shaft in perfect, محاذاة متوازية, all while containing the transmission’s oil supply and supporting the shift-rail mechanism.

يعد هذا الدليل المتعمق موردًا أساسيًا لفنيي النقل المحترفين والمتخصصين في قطع الغيار. We will analyze all 22 serviceable components of the جمعية الإسكان الأوسط FAW, including the main casing, its lubrication system (المقابس, المرشحات), the shift-fork bushings, and the critical reverse light switch.

المكون الأساسي: The Middle Housing (1701035-A2V)

The heart of this assembly is the ‘Mid-housing with steel wire sleeve set assy’ (1701035-A2V). This is the main body of the جمعية الإسكان الأوسط FAW. إنها ضخمة, precision-machined casting, typically made of aluminum to save weight and effectively dissipate heat from the gear oil. هذا المكون هو “هيكل عظمي” that everything else bolts into.

Its most critical features are the internal, الدقة بالملل “السروج” أو “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, leading to a catastrophic “أنين” 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 جمعية الإسكان الأوسط 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 جمعية الإسكان الأوسط FAW.

The Lubrication & Service System

ال جمعية الإسكان الأوسط 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:** "قابس حشو الزيت."’ (1701041-A2K) هو “يملأ” ميناء, located high on the side of the housing. يتم ملء ناقل الحركة حتى يبدأ الزيت بالخروج من هذه الفتحة, which is how the correct oil level is set.

**2. Oil Drain:** قابس التصريف آسى’ (1701765-A2K) هو “بالُوعَة” ميناء, 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 جمعية الإسكان الأوسط FAW.

**3. ختم:** Both plugs are sealed by the ‘Gasket-plug, بالُوعَة’ (1701042-A2K), منها اثنان. هذه هي “crush washers” 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 جمعية الإسكان الأوسط FAW.

Internal Oil Filtration (1701050-A2K)

حرجة, بعد بسيطة, مكون من جمعية الإسكان الأوسط FAW‘s lubrication system is the ‘Filter screen assembly’ (1701050-A2K). هذا هو “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 “خشن” منقي, blocking any large debris (على سبيل المثال, chipped gear teeth, نجارة المعادن, 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. This is a vital part of the جمعية الإسكان الأوسط FAW‘s longevity.

Shift System: البطانات, دبابيس, and Switch

ال جمعية الإسكان الأوسط 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) وحدات. These are the bronze “يرتدي” 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 جمعية الإسكان الأوسط FAW to the rear “المربع الفرعي” (auxiliary) الإسكان.

A key electronic component mounted to this جمعية الإسكان الأوسط FAW is the ‘Reverse light switch assembly’ (3729100-54W-C00). This is a spring-loaded “الغطاس” يُحوّل. When the driver moves the shifter into the reverse gate, the reverse shift rail (supported by 1701014-A9P) pushes this plunger in, الذي يكمل الدائرة الكهربائية. 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

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 22 components identified in the ‘Middle Housing Assembly’ رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5. هذا جمعية الإسكان الأوسط FAW is the core of the main gearbox.

المواصفات الفنية وسياق التجميع

المواصفات ل جمعية الإسكان الأوسط FAW يتم تعريفها من خلال وظيفتها باعتبارها الهيكلية, دقة تشكيله “mid-case” من انتقال العدوى. كامل جمعية الإسكان الأوسط FAW هو عنصر هيكلي رئيسي.