مجموعة عمود إخراج الصندوق الفرعي FAW: لماذا هذه 14 تحدد الأجزاء المهمة أداء مجموعة نقل الحركة

مرحبًا بك في هذا الدليل الفني المهم حول مجموعة عمود إخراج الصندوق الفرعي FAW. هذا هو الكامل “final drive” assembly within the auxiliary “sub-box” of the manual transmission, designed for the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل.

ال مجموعة عمود إخراج الصندوق الفرعي FAW is the final link in the chain of torque multiplication. It receives power from the main box and the sub-box countershaft, and its “منطق” lies in the 2-speed (High/Low range) synchronizer that is built onto it. This assembly is responsible for delivering the final, selected gear ratio to the truck’s driveshaft.

This in-depth guide is an essential resource for professional transmission technicians and parts specialists. سنقوم بتفكيك الكل مجموعة عمود إخراج الصندوق الفرعي FAW فيه 14 مكونات صالحة للخدمة, including the main shaft, the ‘Low gear’ and ‘High gear’ synchronizer hubs, the main bearing, and the final output flange.

المكون الأساسي: The Output Shaft (1701541-A7G)

The backbone of the مجموعة عمود إخراج الصندوق الفرعي FAW is the ‘Output shaft-sub box’ (1701541-A7G). This is a single, massive, forged component made from high-strength, case-hardened steel. It is the final output shaft of the entire transmission system.

This shaft is precision-machined with multiple splined sections and bearing journals. إنه “أنف” أو “tip” is supported by a pilot bearing inside the transmission’s main shaft, while its “tail” is supported by the large ‘Dual-row tapered roller bearing’ (350614 X4DR-1).

The splined sections of this shaft are the “منطق” hubs. They are designed to hold the “sliding sleeves” of the range synchronizer, which are the components that lock either the “عالي” أو “قليل” gear to the shaft. The integrity of these splines is critical, as they must transfer 100% of the vehicle’s final drive torque. Any twist or shear in this component of the مجموعة عمود إخراج الصندوق الفرعي FAW is a catastrophic failure.

ال “Range” منطق: High and Low Gear Synchronizers

جوهر “منطق” التابع مجموعة عمود إخراج الصندوق الفرعي FAW is the 2-speed range selector. This is a single, large synchronizer assembly that provides two speeds: “قليل” (a reduction gear) و “عالي” (direct drive).

**1. Low Range:** The ‘Low gear-sub box’ (1701542FA0L) هو الرئيسي “driven” gear for the low range. It is in constant mesh with the counter-shaft. When the driver selects “قليل,” the ‘Sliding sleeve-sub box synchronizer’ (1701561FA0L) is moved (by a shift fork) to engage its “dog teeth” with this gear, locking it to the ‘Output shaft’. This routes power through the reduction gearset, providing maximum torque. This gear is held in place by the ‘Limit stop ring-low gear’ (1701543-A7G) and ‘Locating washer-low gear’ (1701544-A7G).

**2. High Range:** The ‘High gear synchronizer assembly’ (1701555FA0L) provides the “عالي” سرعة. This is typically a “direct drive” 1:1 نسبة. When the driver selects “عالي,” the *same* ‘Sliding sleeve’ (1701561FA0L) is moved in the opposite direction. It disengages from the low gear and locks directly to the transmission’s main input shaft (which is also the “input” to this sub-box). هذا العمل “أقفال” the main shaft and the output shaft together, causing them to spin at the same speed (1:1 نسبة), bypassing the reduction gears entirely.

This entire High/Low clutch is a single unit on the مجموعة عمود إخراج الصندوق الفرعي FAW, comprised of the ‘Sliding sleeve’, the ‘High gear’ hub, and the ‘Low gear’. The ‘Spring-sub box synchronizer [outer]’ (1701558-A7G) الوحدات هي “detent” springs that provide the “feel” and holding power for the synchronizer keys. ال مجموعة عمود إخراج الصندوق الفرعي FAW‘s function is defined by this clutch.

The Output End: تحمل, شفة, and Speedometer

The rear of the مجموعة عمود إخراج الصندوق الفرعي FAW is where power is delivered to the truck and where speed is measured.

**Main Bearing (350614 X4DR-1):** The ‘Dual-row tapered roller bearing’ is the main output shaft bearing. This is a massive bearing pressed onto the ‘Output shaft’ and seated in the ‘Rear housing assembly’. Its dual-row tapered design is critical, as it is designed to absorb the immense radial loads *and* the extreme axial (thrust) loads of the driveshaft pushing and pulling on the transmission. This is a non-negotiable, heavy-duty component of the مجموعة عمود إخراج الصندوق الفرعي FAW.

**Output Flange (1701616-A7G):** The ‘Output flange’ is the final piece. هذا الثقيل, forged-steel flange is splined onto the tail of the ‘Output shaft’. The truck’s main driveshaft (propshaft) is then bolted to this flange. This component must be secured with immense force, which is the job of the ‘Locking nut assembly’ (1701620-A7G). This is a prevailing-torque nut designed to never back off.

**Speedometer (1701571-A9P):** The ‘Rod-speedometer driven gear’ (1701571-A9P) هو “يقود” gear for the speedometer. It is pressed onto the ‘Output shaft’. As the shaft spins, this gear (often called a “حلقة لهجة”) turns a sensor, providing the “vehicle speed” signal to the ECU and dashboard. The ‘Tachometer gear gasket’ (1701572-A7G) is a shim used to set the correct air gap for this sensor.

أخيراً, the ‘Dust cover’ (1701617-A7G) is a metal shield that is pressed on behind the flange to protect the main output shaft seal (in the rear housing) from road dirt, ماء, والحطام. This small part is critical to the long-term, leak-free operation of the مجموعة عمود إخراج الصندوق الفرعي FAW.

FAW Sub-Box Output Shaft Assembly Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 14 components identified in the ‘Sub-Box Output Shaft Assembly’ رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5. A rebuild of the مجموعة عمود إخراج الصندوق الفرعي FAW requires careful attention to the synchronizer components.

المواصفات الفنية وسياق التجميع

المواصفات ل مجموعة عمود إخراج الصندوق الفرعي FAW are defined by its function as the final, range-shifting output of the transmission. كامل مجموعة عمود إخراج الصندوق الفرعي FAW is a precision-balanced set.