مضخة التوجيه FAW: دليل الخبراء لها 3 المكونات الرئيسية

مرحبًا بك في هذا الدليل الفني المتخصص حول مضخة التوجيه FAW (الجزء لا. 3407020-93W-C00), the hydraulic heart of the steering system for the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل. This component is essential for driver control and safety.

وظيفة مضخة التوجيه FAW is to provide hydraulic assistance, reducing the immense physical effort required to turn the front wheels of a fully-loaded tractor. It does this by generating high-pressure hydraulic fluid (تتجاوز في كثير من الأحيان 1,500 رطل لكل بوصة مربعة) that is fed to the steering gear.

This in-depth guide is a critical resource for professional technicians and fleet managers. سنقوم بتفكيك الكل مضخة التوجيه FAW mounting assembly into its 3 أصغر الوحدات الصالحة للخدمة: the main pump, its critical mounting gasket, and the high-tensile fasteners that secure it to the engine.

المكون الأساسي: The Power Steering Pump (3407020-93W-C00)

The main component is the ‘Power Steering Pump Assembly’ (3407020-93W-C00). This is the heart of the hydraulic assist system. For a heavy-duty diesel engine, ال مضخة التوجيه FAW is not a belt-driven accessory as in a passenger car. بدلاً من, it is a robust, gear-driven pump that mounts directly to the engine’s timing gear case. This direct gear-drive is essential for reliability, as it eliminates the risk of a slipping or breaking belt, which would instantly make the truck incredibly difficult to steer.

هذا مضخة التوجيه FAW is a positive-displacement pump, most likely a high-volume **gerotor** or **vane-type** pump. In a vane pump design, a slotted rotor spins inside an eccentric (off-center) الإسكان. Vanes slide in and out of the rotor slots, creating expanding chambers on the inlet side (which draw in low-pressure fluid from the reservoir) and shrinking chambers on the outlet side. هذا “shrinking” action is what compresses the fluid and generates the high pressure needed for the steering gear.

A critical feature of the مضخة التوجيه FAW is its internal **flow control valve**. This valve is essential because a gear-driven pump’s output volume increases with engine RPM. If uncontrolled, the steering would be overly sensitive at high speeds and normal at idle. The flow control valve, which is a spring-loaded spool valve, bleeds off excess fluid at higher RPMs, ensuring that the *volume* of fluid sent to the steering gear is constant. This provides a consistent, predictable steering “يشعر” whether the truck is idling or at highway speed.

Also housed within the مضخة التوجيه FAW assembly is a **pressure relief valve**. This is a safety poppet valve. When the driver turns the steering wheel all the way to a “قفل” (على سبيل المثال, in a parking lot), the steering gear is blocked and can no longer accept fluid. The pressure in the hose would spike almost instantaneously, high enough to rupture the hose or damage the pump. The relief valve senses this pressure spike (على سبيل المثال, >1500 رطل لكل بوصة مربعة) and opens, dumping the high-pressure fluid directly back to the inlet side, protecting the entire system. ال “أنين” you hear when holding the wheel at a full lock is the sound of this valve in operation. فشل ال مضخة التوجيه FAW often means one of these internal valves has failed, or the gerotor/vane assembly itself is worn out, causing low pressure and stiff steering.

The Critical Seal: مضخة التوجيه حشية قوى (3407024-26د)

The ‘Gasket-Power Steering Pump’ (3407024-26د) is the single most critical serviceable part in this assembly. لأن مضخة التوجيه FAW is gear-driven, it mounts directly to the engine’s timing gear case with a flange, just like the fuel injection pump or air compressor. This one gasket must seal this complex interface.

This gasket has two primary, high-stakes functions. أولاً, it must seal the “ينظف” hydraulic steering fluid from the “متسخ” زيت المحرك. The main drive gear of the مضخة التوجيه FAW is lubricated by the engine’s timing gear case, which is filled with engine oil. The pump’s main shaft must pass through this interface. هذه الحشية (along with a shaft seal) prevents the two fluids from ever mixing. A failure here would contaminate the entire power steering system with abrasive engine oil and soot, destroying the steering gear.

ثانية, this gasket must also seal the pump’s internal hydraulic passages. ال مضخة التوجيه FAW‘s flange has a low-pressure “مدخل” ميناء (drawing fluid from the reservoir) and a high-pressure “مَنفَذ” ميناء (feeding the steering gear). This gasket creates a high-pressure seal for the outlet port, منع 1,500+ PSI hydraulic fluid from leaking externally.

A failure of this gasket on the inlet side would cause the مضخة التوجيه FAW to suck in air, leading to cavitation (a loud whining or grinding noise) and foamy, unresponsive steering. A failure on the outlet side would result in a massive, high-pressure hydraulic fluid leak. This gasket is a non-reusable, “replace-on-sight” عنصر.

نظام السحابة: مسامير شفة (س1841030)

The final components listed are the two ‘Hex flange bolt, قضيب خشن (نوع قياسي)’ (س1841030) السحابات. These are the two high-tensile bolts that secure the entire مضخة التوجيه FAW assembly to the engine’s gear case.

These bolts must perform a critical task: they must provide the precise and even clamping force required to compress the ‘Gasket-Power Steering Pump’ (3407024-26د) and create a perfect seal. بالإضافة إلى, they must resist the immense rotational “shearing” force that the drive gear exerts on the مضخة التوجيه FAW.

ال “شفة” head design is a deliberate engineering choice. The integrated washer head distributes the clamping load over a wider surface area of the pump’s mounting flange. This is critical to prevent the hard steel bolt from cracking the (محتمل) aluminum pump housing, and it also resists loosening from the constant vibration of the diesel engine. سلامة مضخة التوجيه FAW‘s mount is entirely dependent on these two high-strength bolts.

FAW Power Steering Pump Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 3 components identified in the ‘Power Steering Pump’ رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5. A professional service of the مضخة التوجيه FAW requires replacing the gasket.

المواصفات الفنية وسياق التجميع

المواصفات ل مضخة التوجيه FAW يتم تعريفها من خلال وظيفتها باعتبارها ارتفاع الضغط, gear-driven hydraulic pump. موثوقية مضخة التوجيه FAW is critical for vehicle control.