جهاز الدعم الهيدروليكي FAW للكابينة: 5 المكونات المحورية الهامة لسلامة الإمالة

Welcome to this critical technical deep dive into the جهاز الدعم الهيدروليكي FAW للكابينة (Lower Mount Assembly). This component group is the structural pivot and anchor point for the hydraulic cab tilt cylinder on the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل. إنه “منطق” is to create a secure, high-strength pivot, allowing the hydraulic cylinder to articulate safely as it lifts the entire weight of the cab.

ال جهاز الدعم الهيدروليكي FAW للكابينة is not the cylinder itself, but the assembly of hardware that connects the “eye” (lower loop) of the cylinder to the main chassis frame. هذا “pivot logic” is a high-stress, high-shear application. It must be strong enough to withstand the immense forces of lifting the cab, and durable enough to resist the constant, high-frequency vibrations from the engine and road.

This in-depth guide is an essential resource for chassis technicians and service managers. سنقوم بتفكيك الكل جهاز الدعم الهيدروليكي FAW للكابينة فيه 5 أنواع المكونات الأساسية. We will analyze the main ‘Pivot Pin’ (the core MSU), the vibration-damping ‘Soft Pads’, والحرجة, multi-stage “المضادة للاهتزاز” fastener system that holds it all together.

جامعة ولاية ميشيغان 1: ال “kingpin” – The Logic of the Lower Pivot Pin (5002023AB85)

هذا المكون, the ‘Pin-hydraulic cylinder lower fixed point’ (5002023AB85), هو “لفترة أطول” and most critical MSU in the entire جهاز الدعم الهيدروليكي FAW للكابينة. This single pin is the “المحور” on which the entire hydraulic cylinder pivots.

Shear-Load Logic: ال “منطق” of this pin is to handle extreme shear force. When the hydraulic cylinder is actuated to lift the multi-ton cab, the entire weight and force is concentrated on this one pin. It is designed to resist being “sliced” in half. To achieve this, this MSU is not a simple bolt; it is a precision-ground, high-tensile, hardened steel dowel.

بناء: This pin is likely made from a high-carbon alloy steel (like 4140) that has been case-hardened. This process creates an ultra-hard, wear-resistant outer “skin” while maintaining a slightly softer, more ductile core. ال “منطق” of this metallurgy is to provide a surface that resists wear from the pivoting bushings, while the core remains tough and resistant to the shock loads that could snap a brittle, fully-hardened pin. The surface is also polished to a low-friction finish to allow for smooth rotation.

إمكانية الخدمة (جامعة ولاية ميشيغان): This pin is a primary MSU and a key wear item. Over tens of thousands of tilt cycles, or from high vibration, the pin can begin to wear, creating a “التشويش” أو “slop” in the lower cab mount. During service of the Entry_ID_475 (Cab Tilting Cylinder), this pin must be inspected. If any scoring, pitting, أو “ovaling” (uneven wear) is present, the pin must be replaced. Failure to replace a worn pin will lead to the rapid destruction of the ‘Soft Pads’ (جامعة ولاية ميشيغان 3) and eventual failure of the entire جهاز الدعم الهيدروليكي FAW للكابينة.

جامعة ولاية ميشيغان 3 & 4: The Vibration Damping “منطق” (وسادات & غسالة)

توفر هذه المجموعة من المكونات “cushioning” and spacing logic for the جهاز الدعم الهيدروليكي FAW للكابينة.

1. ‘Soft pad-hydraulic cylinder lower fixed point’ (5002027-أ01): The parts list calls for two (2) of these critical MSUs. These are the bushings for the pivot. هُم “منطق” is to prevent metal-on-metal contact.

These pads are placed on either side of the cylinder’s “eye,” sandwiched between the cylinder and the chassis-mounted bracket. They are made from a high-durometer polymer or nylon. This design provides three functions:

• تخميد الاهتزاز: They absorb high-frequency vibrations from the engine/chassis, protecting the hydraulic cylinder’s seals from damage.
• Noise Prevention: They prevent the “squeaking” و “groaning” that would come from a steel-on-steel pivot.
• Sacrificial Wear: They are designed to be the “ذبيحة” عنصر. They are much cheaper to replace than the pin or the cylinder.

2. ‘Large washer’ (س40218): This single MSU works with the fastener system. إنه “منطق” is load distribution. It is placed on the outside of the chassis bracket, providing a large, flat surface for the nut to tighten against. This prevents the nut from “digging into” أو “ovaling” the hole in the bracket, ضمان جهاز الدعم الهيدروليكي FAW للكابينة remains securely clamped.

جامعة ولاية ميشيغان 2 & 5: ال “المضادة للاهتزاز” المنطق السحابي

This final group of MSUs is the hardware that secures the main ‘Pivot Pin’. ال “منطق” here is all about anti-vibration, a critical safety feature for the جهاز الدعم الهيدروليكي FAW للكابينة. The system uses two different nuts.

1. ‘Hexagon flange nut’ (Q039620): This is likely the “primary” nut. The pin (جامعة ولاية ميشيغان 1) is threaded on its end, passes through the bracket, the bushings, and the cylinder eye, and exits the other side. This nut, along with the ‘Large washer’ (جامعة ولاية ميشيغان 4), is tightened to set the correct “preload” on the soft pads. ال “شفة” logic means it has an integrated washer, providing a wide, secure clamping face.

2. ‘Type 1 non-metallic insert hexagon lock nut’ (Q32918T): This is the most critical safety component in the جهاز الدعم الهيدروليكي FAW للكابينة. هذا هو “نيلوك” nut. إنه “منطق” is to be a *jam nut* or *locking nut*.

It is threaded onto the pin *after* the primary nut (Q039620). The internal nylon ring binds tightly to the threads, creating a powerful “prevailing torque” that *prevents* the primary nut from backing off due to vibration. A standard nut *will* vibrate loose. This dual-nut, self-locking system is what guarantees the pivot pin cannot fall out, which would cause the cab to become detached from the tilt cylinder.

إمكانية الخدمة (جامعة ولاية ميشيغان): Both nuts are MSUs. The ‘Lock nut’ (Q32918T) is **strictly a single-use part**. Once it is removed, the nylon insert is permanently deformed and loses its locking ability. It *must* be replaced with a new nut every single time the جهاز الدعم الهيدروليكي FAW للكابينة is serviced.

FAW Hydraulic Support Device For The Cab Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 5 أنواع المكونات المحددة في جهاز الدعم الهيدروليكي FAW للكابينة (Lower Mount) رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5.

المواصفات الفنية وسياق التجميع

المواصفات ل جهاز الدعم الهيدروليكي FAW للكابينة are defined by its function as a high-shear, anti-vibration pivot point. All components are critical safety MSUs.