FAW Rear Housing Assembly: تحليل خبير ل 22 المكونات الأساسية

مرحبًا بكم في هذا التحليل الخبير لـ FAW Rear Housing Assembly (الجزء لا. 1701505-A9P), الحرجة “صندوق مساعد” أو “range box” for the manual transmission in the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل.

هذا FAW Rear Housing Assembly is the foundation of the transmission’s “الخائن” أو “يتراوح” قسم. It bolts to the back of the main transmission case and contains the crucial gearset that provides the “عالي” و “قليل” ranges, effectively doubling the number of available gears (على سبيل المثال, turning a 6-speed into a 12-speed).

يعد هذا الدليل المتعمق موردًا أساسيًا لفنيي النقل المحترفين والمتخصصين في قطع الغيار. سنقوم بتفكيك الكل FAW Rear Housing Assembly فيه 22 مكونات صالحة للخدمة, بما في ذلك السكن الرئيسي, the output shaft bearings, the critical adjustment shims, and the speedometer drive system.

المكون الأساسي: The Rear Housing Assembly (1701505-A9P)

The foundation of this entire assembly is the ‘Rear housing with steel wire sleeve set assy’ (1701505-A9P). This is the main structural casing of the FAW Rear Housing Assembly (صندوق مساعد). إنها ضخمة, precision-machined casting, typically made of aluminum to save weight and dissipate heat.

Its function is to house the entire “يتراوح” gearset, which includes the range synchronizer and the “عالي” و “قليل” ratio gears. It must hold the auxiliary output shaft and auxiliary counter-shaft in perfect, parallel alignment under thousands of pound-feet of multiplied torque.

ال “مجموعة الأكمام أسلاك الفولاذ” designation is a critical, high-quality feature. It means that the high-stress threaded holes in the aluminum FAW Rear Housing Assembly are pre-fitted with “Helicoils” (steel wire thread inserts). This prevents technicians from stripping the soft aluminum threads when tightening the heavy-duty steel bolts, dramatically increasing the component’s service life and durability.

The Critical “الملئ” نظام: Adjustment Gaskets

The most complex and “logical” جزء من FAW Rear Housing Assembly is its shimming system. The parts list details ten different ‘Adjustment gasket-sub box intermediate shaft’ عناصر (جزء رقم. 1701526-A9P through 1701537-A9P). These are not standard gaskets; they are **selective shims**.

When a transmission is built, ال “نهاية اللعب” (the amount of fore-and-aft movement) of the counter-shaft is a critical, zero-tolerance specification. If the shaft is too “مرتخي,” the helical gears will “أنين” and fail to mesh properly. If it is too “ضيق,” the bearings will overheat, اغتنام, and be destroyed.

المذكرة “(See 1701526-A9P)” indicates that these parts form a set. A technician assembles the FAW Rear Housing Assembly, measures the end-play with a dial indicator, and then consults a service manual. The manual will instruct them to select *one specific shim* (على سبيل المثال, 1701528-A9P) from this set. Each shim has a minutely different thickness.

Installing this one, correct shim sets the bearing “التحميل المسبق” to the perfect factory specification. This shimming procedure is the single most important step in rebuilding a FAW Rear Housing Assembly, as it ensures a quiet, موثوق, and long-lasting gearbox.

The Output System: محامل, Caps, وعداد السرعة

ال FAW Rear Housing Assembly provides the final output to the vehicle’s driveshaft. This is supported by the ‘Rear bearing-sub box output shaft’ (1701586-A9P). This is a massive roller bearing that supports the final output shaft, which is subjected to the full, multiplied torque of the selected gear ratio.

This bearing is held in place by the ‘Rear bearing cap-sub box output shaft’ (1701521-A9P), which is a heavy-duty cap that bolts to the rear of the FAW Rear Housing Assembly. This cap not only retains the bearing but also houses the main output shaft oil seal (غير مصورة), which prevents all the gear oil from leaking out.

This sub-assembly also contains the ‘Speedometer driven shaft assembly’ (1701440-11) and its corresponding ‘Driven gear-speedometer’ (1701446-A9P). This is the mechanical “إقلاع الطاقة” for the speedometer. A plastic gear on the output shaft spins this driven gear, which in turn spins a cable or electronic sensor (via the ‘Speedometer connector’ 1701447-A9P) to provide the vehicle speed to the dashboard. This is a critical data-reporting function of the FAW Rear Housing Assembly.

خدمة, يدعم, والسحابات

ال FAW Rear Housing Assembly is designed for service. It includes an ‘Oil filler plug assembly’ (1701765-A2K) و"الحشية".’ (1701042-A2K) for filling the auxiliary box with its own separate oil supply. It also features a ‘Cover-sub box shifting oil hole’ (1701517-A9P) for accessing and servicing the range-shifter mechanism.

كامل FAW Rear Housing Assembly is supported and held rigid by the ‘Tension rod flexible cushion assembly’ (1302050-01) and its associated ‘Cushion’ (1302052-01). هؤلاء “قضبان البقاء” connect the heavy transmission to the chassis crossmembers, preventing the entire powertrain from twisting under torque and allowing the ‘Tension bolt’ (1702129-1ح) to maintain perfect alignment.

The assembly is held together with a massive number of high-tensile fasteners, including ‘Hex flange bolts’ (Q1841035S, Q1841085S, Q1841035S) و "مسامير سداسية الرأس".’ (CQ1500512S). The ‘Spring gaskets’ (س40308, Q40405) و "المكسرات السداسية."’ (CQ34008) are critical for ensuring none of these fasteners vibrate loose, which would be catastrophic for the FAW Rear Housing Assembly.

FAW Rear Housing Assembly Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 22 components identified in the ‘Rear Housing Assembly’ (Sub-Box) رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5. إعادة بناء FAW Rear Housing Assembly requires careful selection of the correct adjustment gaskets.

المواصفات الفنية وسياق التجميع

المواصفات ل FAW Rear Housing Assembly يتم تعريفها من خلال وظيفتها باعتبارها الهيكلية, دقة تشكيله “المربع الفرعي” أو “range box”. كامل FAW Rear Housing Assembly is a zero-tolerance component.