خط الفرامل فاو: تفكيك 56 المكونات المهمة التي تضمن سلامتك

مرحبًا بك في هذا الدليل الفني المهم حول خط الفرامل فاو نظام (حَشد 539). هذا هو الكامل, multi-circuit, high-pressure pneumatic braking and control system for the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل. This assembly is arguably the most critical safety system on the entire vehicle.

ال خط الفرامل فاو ليس جزءا واحدا, ولكن معقدة “منطق” network of valves, خراطيم, الأنابيب, أجهزة الاستشعار, and brackets. Its function is to take the compressed air from the air compressor and distribute it on demand to the service brakes (foot pedal), parking brakes (hand valve), and trailer brake circuits. هذا “air-over-mechanical” logic provides the immense stopping power required for a fully-loaded tractor-trailer.

يعد هذا الدليل المتعمق موردًا أساسيًا لفنيي الهياكل المحترفين والمتخصصين في قطع الغيار. سنقوم بتفكيك الكل خط الفرامل فاو النظام فيه 56 مكونات صالحة للخدمة, including the ‘Air dryer’ (3511020-81W-C00), ‘Air processing unit’ (3515020-81W-C00), ‘ABS solenoid valve’ (3550310-50أ), and all the critical hoses, التركيبات, and brackets that make the system function.

ال “منطق” of a Pneumatic FAW Brake Line

ال خط الفرامل فاو system is pneumatic (air-powered), not hydraulic like a passenger car. This is a critical design “منطق” for heavy-duty trucks. أولاً, air pressure provides far more stopping force than hydraulic pressure can, which is essential for a 40-ton vehicle. ثانية, the system is “fail-safe.” A hydraulic leak results in total brake failure. A leak in a pneumatic خط الفرامل فاو will cause the spring-brakes (parking brakes) to automatically engage, safely stopping the truck.

This logic is managed by two core components:

• **’Air dryer assembly’ (3511020-81W-C00):** هذا هو “رئة” التابع خط الفرامل فاو. It takes hot, wet air from the compressor and “يجف” it by passing it through a desiccant filter. This is a critical first step, as any moisture in the system would freeze in cold weather, blocking the valves and causing total brake failure.
• **’Air processing unit (APU)’ (3515020-81W-C00):** هذا هو “brain.” It is a central distribution manifold. It takes the clean, dry air and splits it into multiple, redundant circuits (على سبيل المثال, front brakes, rear brakes, trailer brakes, parking brake). This ensures that a failure in one خط الفرامل فاو الدائرة (like a blown hose) will not cause a total loss of stopping power.

ال “المنطق الالكتروني”: ABS and Solenoids

The modern خط الفرامل فاو system is not just pneumatic; it is electro-pneumatic. The ‘Anti-lock brake solenoid valve assembly’ (3550310-50أ) is the electronic interface. This valve block receives high-speed commands (hundreds of times per second) from the truck’s ABS computer.

When the driver panic-stops and a wheel begins to lock up (as detected by the wheel speed sensors), the ABS computer instantly commands this solenoid. The solenoid then rapidly “مضخات” the air pressure to that specific wheel’s brake chamber, releasing and reapplying the brake much faster than any human could. هذا هو “مضاد للقفل” logic that allows the driver to maintain steering control during a panic stop.

This system also includes the ‘Hand brake valve with protective cover assy’ (3508015-91W-C00) and ‘Foot brake valve & clutch plate assy’ (3504020-91دبليو). These are the driver’s primary inputs, translating foot and hand movement into proportional air pressure signals. ال خط الفرامل فاو is a complex integration of mechanical, هوائي, and electronic logic.

ال “خطوط”: خراطيم, أنابيب, and Bundles

ال “Line” جزء من خط الفرامل فاو keyword refers to the physical “الشرايين” that carry the compressed air. This is a combination of rigid pipes and flexible hoses.

**خراطيم:** The ‘Brake flexible hose-front brake’ (3506030-60أ & 3506040-1051) and ‘Control flexible hose-front brake’ (3506040-1051) are used at the “wheel ends.” هذا أمر بالغ الأهمية “منطق” خيار, as these flexible, wire-braided hoses must be able to withstand 120+ PSI of pressure while constantly flexing and turning with the front steering wheels. A cracked or abraded hose is a common failure point in any خط الفرامل فاو نظام.

**أنابيب & Bundles:** The ‘Front air pipe assy’ (3506205-91دبليو), ‘Pipe bundle assy’ (3506100-92دبليو), and ‘Air compressor air pipe assy’ (3506210A91W) are the main rigid lines. These are typically pre-bent nylon or steel tubes that run along the chassis frame. They are bundled together for protection and ease of installation. أ “bundle” هو جزء رئيسي من خط الفرامل فاو منطق, as it keeps the critical, color-coded lines organized and protected from road debris.

بين قوسين, تركيبات, and Support Structure

أ خط الفرامل فاو system is under constant vibration. إنه “منطق” requires that it be rigidly mounted to the chassis to prevent fatigue and failure. This parts list details an extensive support system:

• ‘Front pipe bundle bracket’ (3506038-91دبليو, 3506430-91دبليو)
• ‘Bracket-hand brake valve’ (3522012-91دبليو)
• ‘Bracket-air processing unit’ (3515021-91دبليو)
• ‘Transition bracket-air storage module’ (3513824-91دبليو)
• ‘Main wiring harness bracket’ (3724426-68الخامس) (shared bracket)

The ‘Fittings’ are the dozens of small, but critical, الموصلات. This includes ‘Grommets’ (3506204-50أ), ‘Multi-way joints’ (3506404-50أ), "المقابس."’ (3506407-1500), and numerous ‘Sealing rings’ (3515416-81W-C00, 3513403-1500, 3506413-1500, إلخ.). Each one of these is a potential leak point. ال “منطق” التابع خط الفرامل فاو is to use high-quality, O-ring-sealed (grommet-type) fittings to ensure a leak-free system. A leaking fitting is a critical, “vehicle-down” فشل.

كامل خط الفرامل فاو is fastened with hundreds of high-tensile, السحابات المقاومة للاهتزاز, including ‘Hex flange bolts’ (Q1841445T) و"صواميل قفل شفة سداسية الرأس".’ (CQ32614), to ensure total system integrity.

FAW Brake Line Parts List (1/2)

يعرض الجدول التالي الجزء الأول من التقسيم التفصيلي لـ خط الفرامل فاو (539) رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5.

FAW Brake Line Parts List (2/2)

يوضح هذا الجدول المكونات المتبقية لل خط الفرامل فاو (539) رسم بياني.

المواصفات الفنية وسياق التجميع

المواصفات ل خط الفرامل فاو system are defined by its function as a complete, multi-circuit, high-pressure pneumatic system. ال خط الفرامل فاو is a safety-critical system for vehicle control.