FAW Auxiliary Cylinder Assembly: ال 8 Comprehensive Components Explained

مرحبًا بك في هذا الدليل الفني الشامل حول FAW Auxiliary Cylinder Assembly. This is the complete pneumatic “عضلة” و “منطق” system that actuates the high/low range splitter for the auxiliary “المربع الفرعي” of the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل.

ال FAW Auxiliary Cylinder Assembly is the component that physically moves the synchronizer fork to shift the transmission from its “قليل” يتراوح (for pulling heavy loads) to its “عالي” يتراوح (for highway cruising). It is powered by the truck’s main compressed air system and controlled by an electronic solenoid.

This in-depth guide is a critical resource for professional transmission technicians and fleet managers. سنقوم بتفكيك الكل FAW Auxiliary Cylinder Assembly فيه 8 مكونات صالحة للخدمة, including the main cylinder and shaft, the shift fork, the air fittings, وأجهزة القفل الحرجة.

المكون الأساسي: مجموعة الأسطوانة (1701640-A2V)

قلب ال FAW Auxiliary Cylinder Assembly is the ‘Cylinder assembly-sub box’ (1701640-A2V). This is the main pneumatic actuator. This component is a high-reliability air cylinder, typically mounted to the side of the transmission’s rear housing.

إنه “منطق” is simple but powerful. The cylinder contains an internal piston and a robust seal. عندما يقلب السائق “range selector” switch in the cab, an electronic solenoid (a separate part) directs high-pressure air (100+ رطل لكل بوصة مربعة) from the truck’s main air system into one of the ’90-degree elbow joint assembly-cylinder’ (1701755-A8L) الموانئ.

This blast of air slams the piston forward, moving the ‘Cylinder fork shaft assembly’ (1701640AA9P, a sub-part) that is attached to it. When the driver selects the other range, the solenoid vents the air from the first port and pressurizes the second port, slamming the piston and shaft in the opposite direction. This pneumatic “عضلة” provides the several hundred pounds of force required to move the shift fork.

A failure of the internal piston seal in this FAW Auxiliary Cylinder Assembly will cause an air leak. This leak is critical: it not only prevents the transmission from shifting ranges but also creates a parasitic drain on the truck’s main air brake system, وهو خطر كبير على السلامة. موثوقية FAW Auxiliary Cylinder Assembly is therefore paramount.

ال “العضلات”: شوكة التحول (1701632-A2V)

The ‘Fork – sub-box synchronizer’ (1701632-A2V) is the mechanical link between the air cylinder and the gearbox internals. هذا المكون من FAW Auxiliary Cylinder Assembly هو واجب ثقيل, الصلب مزورة “yoke.”

It is attached to the end of the pneumatic ‘Cylinder fork shaft’ (1701640-A2V). الاثنان “أسنان” of the fork ride in a deep groove on the “sliding sleeve” of the sub-box output shaft’s synchronizer (انظر الجمعية 149). When the air cylinder moves the shaft, this fork moves with it, physically sliding the synchronizer hub to engage either the high-range or low-range gear set.

This fork is a high-wear, high-stress component. ال “وسادات” on the end of the fork tines are in constant, light contact with the spinning synchronizer sleeve. Over hundreds of thousands of shifts, هذه الفوط يمكن أن تتآكل. Excessive wear will cause a “قذرة” يحول, incomplete gear engagement, أو “ظهرت” of range. A cracked fork is a critical failure of the FAW Auxiliary Cylinder Assembly.

Air Supply and Plumbing Components

ال FAW Auxiliary Cylinder Assembly is powered by air, requiring a leak-free plumbing system. The two ’90-degree elbow joint assembly-cylinder’ (1701755-A8L) fittings are the “مدخل” و “مَنفَذ” ports for the air cylinder.

These are high-pressure, threaded fittings that allow the air lines to be connected at a 90-degree angle, which is essential for routing hoses in the tight confines of the transmission tunnel.

The ‘Terminal-type pipe joint – tapered pipe connection’ (C063005) هو الرئيسي “إمداد” مناسب. It is likely where the main air-feed line from the solenoid block connects to the rigid piping of the FAW Auxiliary Cylinder Assembly.

A leak in any of these high-pressure fittings is a major fault. It will cause the FAW Auxiliary Cylinder Assembly to be weak or unresponsive. والأهم من ذلك, it creates a parasitic leak on the main brake system, forcing the engine’s air compressor to run constantly, which is a major safety concern.

The Critical Fastener & Locking Wire System (1701578-A2K)

The mounting hardware for the FAW Auxiliary Cylinder Assembly is designed for maximum security in a high-vibration environment. "مسامير شفة سداسية."’ (Q1841040s) و "جوانات الربيع".’ (س40310) are used to secure the main cylinder body to the transmission housing. The flange head and spring washer work together to provide a high-clamping force that resists vibration.

لكن, the most critical fasteners in this FAW Auxiliary Cylinder Assembly are the ‘Hex head bolt with hole’ (1701633-A7G) وحدات. القائمة تدعو لاثنين. These are used for a “لا يمكن أن تفشل” اتصال, almost certainly to attach the ‘Fork’ (1701632-A2V) to the ‘Cylinder fork shaft’.

These bolts have a hole drilled through their heads. This is for the ‘Steel locking wire’ (1701578-A2K). This is a critical safety “منطق.” After the technician torques these bolts to the correct specification, this steel wire is threaded through the holes in both bolt heads and then twisted taut.

هذا “lock wire” makes it physically impossible for the bolts to rotate or back out from vibration. If these bolts came loose, the shift fork would detach from the cylinder, and the driver would be permanently stuck in whatever range they were in (either high or low). A missing lock wire is a sign of an incomplete repair and a critical safety risk. This entire hardware set is essential to the function of the FAW Auxiliary Cylinder Assembly.

FAW Auxiliary Cylinder Assembly Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 8 components identified in the ‘Auxiliary Cylinder Assembly’ رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5. ال FAW Auxiliary Cylinder Assembly هو “عضلة” for the transmission’s range selector.

المواصفات الفنية وسياق التجميع

المواصفات ل FAW Auxiliary Cylinder Assembly are defined by its function as a high-force, pneumatic actuator for the transmission’s range selector. ال FAW Auxiliary Cylinder Assembly is a safety-critical part.