وحدة التحكم في إمالة الكابينة FAW: 2 في 1 “المنطق المزدوج” نظام للوصول الكامل إلى الكابينة

Welcome to this in-depth technical breakdown of the وحدة التحكم في إمالة الكابينة FAW. This is the complete hydraulic and electric assembly responsible for lifting the entire cab-over-engine on the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل. This is one of the most critical safety and maintenance systems on the vehicle, as its “منطق” is to provide technicians with safe, reliable access to the engine and transmission.

ال “تجميع المنطق” designation for the وحدة التحكم في إمالة الكابينة FAW هو المفتاح. This is not one system, but a “المنطق المزدوج” أو “هجين” نظام. It combines a primary ‘Electric pump assy’ (5002075B91W-C00) for effortless, push-button operation, with a secondary, “backup” ‘Manual pump assy’ (5002070B91W-C00). This built-in redundancy is a critical safety “منطق,” ensuring that a technician can *always* lift the cab, even if the truck’s battery is dead.

This expert guide is an essential resource for technicians and fleet operators. سنقوم بتفكيك الكل وحدة التحكم في إمالة الكابينة FAW فيه 23 component types. سنقوم بتحليل “المنطق الكهربائي” (the motor, مضخة, and relay), ال “Manual Logic” (the hand pump and switch), the shared “Hydraulic Network” (the hoses), و “Fastening Logic” (the critical anti-vibration hardware).

جوهر 1: ال “المنطق الكهربائي” System (وحدات التخزين المتنقلة 19-22)

This is the primary, convenience-focused part of the وحدة التحكم في إمالة الكابينة FAW. This system allows the driver or technician to lift the cab by simply pressing the ‘Hydraulic cab tilt switch assy’ (3735080-أ01) inside the cab.

1. ‘Electric pump assy’ (5002075B91W-C00): هذا هو “brain and muscle” of the electric system. This MSU is an integrated unit that combines the hydraulic pump and the electric motor into one assembly.

2. ‘Electric pump motor’ (5002180AA01-C00): This is the high-torque, 24V DC motor that drives the pump. إنه “منطق” is to provide high power for a short, intermittent duration. It draws a massive amount of current, which is why it cannot be wired directly to the dashboard switch.

3. ‘Electric pump relay assy’ (5002190B91W-C00): هذا هو “منطق” that makes the system safe. The in-cab switch (3735080-أ01) sends a small, low-amperage signal to this relay. This relay (a heavy-duty solenoid) then closes, handling the massive, high-amperage current needed by the motor. This protects the cab’s wiring from melting. This relay is a critical MSU.

4. ‘Electric pump shield assy’ (5002185B91W-C00): This is the system’s “armor.” This MSU protects the entire electric pump assembly from road debris, water spray, and ice. A missing shield is a common cause of premature motor corrosion and failure.

جوهر 2: ال “Manual Logic” Backup System (وحدات التخزين المتنقلة 1-4)

هذا هو “redundancy logic” built into the وحدة التحكم في إمالة الكابينة FAW. This system ensures that even with a dead battery, a failed motor, or a blown relay, the cab can still be lifted for service.

1. ‘Manual pump – cab lift’ (5002070B91W-C00): This is the core of the manual system. It is a hydraulic hand pump, similar to a bottle jack. The technician inserts the truck’s jack handle (from the tool kit) into this pump’s socket and manually pumps it to raise the cab.

2. ‘Manual switch bracket assy’ (5002120ب91دبليو): This bracket holds the manual pump. والأهم من ذلك, it holds the “changeover switch” أو “selector valve.” ال “منطق” is that a technician must *first* turn this valve (often with the same jack handle) to change the hydraulic circuit from “electric mode” ل “manual mode.” This prevents the manual pump from trying to push fluid “backwards” through the electric pump.

3. ‘Gasket’ (5002133ب91دبليو): This MSU provides the critical seal between the manual pump and its mounting bracket, preventing hydraulic fluid leaks under high pressure.

جوهر 3: ال “المنطق المزدوج” Hydraulic Network (وحدات التخزين المتنقلة 8-13)

هذه المجموعة من وحدات MSU هي “plumbing” التابع وحدة التحكم في إمالة الكابينة FAW. These high-pressure hydraulic hoses are the arteries that connect *both* pumps to the main tilt cylinder.

1. The 3-Way Logic: ‘Hose assy – connect pump to 3-way joint’ (5002085B91W-C00)

هذا هو “منطق” that allows the dual-pump system to work. ال “3-way joint” (or a T-junction) is the point where the fluid line from the electric pump and the fluid line from the manual pump *meet*. From this junction, a single line then proceeds to the main tilt cylinder. This hose is the MSU that makes this “combined” logic possible.

2. ال “Push/Pull” منطق: (وحدات التخزين المتنقلة 11 & 12)

The system uses a dual-action cylinder, which requires two hoses:

• ‘Hose assy – hydraulic cylinder push oil port’ (5002080B91W-C00): هذا هو “lift” line. The pumps push high-pressure fluid through this hose to *extend* the cylinder and lift the cab.
• ‘Hose assy – hydraulic cylinder pull oil port’ (5002100B91W-C00): هذا هو “lower” line. To lower the cab, the changeover valve is opened, allowing the cab’s weight to push fluid *out* of the cylinder and back to the reservoir through this hose.

3. حماية & Routing (وحدات التخزين المتنقلة 13, 16, 17):

These are the critical, often-overlooked MSUs. A ‘Deflector plate’ (5002141ب91دبليو) and ‘Shield-hydraulic oil pipe’ (5002146ب91دبليو) protect these vital hoses from road debris, stone chips, and high heat from the exhaust. A ‘Rubber seal’ (3724032-50أ) protects a hose as it passes through a chassis member. A failure of these protective MSUs leads to a chafed, burst hose, which is the #1 failure point for any hydraulic system.

جوهر 4: ال “المضادة للاهتزاز” المنطق السحابي (وحدات التخزين المتنقلة 5, 6, 14, 15, 18)

كامل وحدة التحكم في إمالة الكابينة FAW is subject to massive vibration. The fastener system is not just hardware; it is an engineered “المضادة للاهتزاز” logic to prevent the pumps from shaking themselves loose.

‘Combination bolt’ (CQ1461035, CQ1460825, CQ1460820): The parts list calls for a total of eight (8) من هؤلاء. ال “مزيج” logic is the most important feature. These bolts have a *captive, غسالة القفل المرفقة مسبقًا* (either a spring washer or serrated head). This lock washer provides constant tension, making it physically impossible for the bolt to back out from vibration.

"الجوز السداسي."’ (CQ34008): These four nuts are used on the other side of the bolts (على سبيل المثال, CQ1460820). They are high-tensile, عزم الدوران السائد “نيلوك” المكسرات. Their nylon insert binds to the threads, providing a *second layer* of anti-vibration logic. This dual-system (lock washer + قفل الجوز) is what ensures the وحدة التحكم في إمالة الكابينة FAW remains securely fastened for the life of the vehicle.

FAW Cab Tilt Control Unit Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 23 أنواع المكونات المحددة في وحدة التحكم في إمالة الكابينة FAW رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5.

المواصفات الفنية وسياق التجميع

المواصفات ل وحدة التحكم في إمالة الكابينة FAW are defined by its critical, dual-logic function. It combines a primary electric system for convenience and a manual backup system for safety and service redundancy.