FAW Central Wheel Hub Assembly Aluminium Rim: Критический анализ 13 Основные компоненты

Welcome to this critical technical analysis of the FAW Central Wheel Hub Assembly Aluminium Rim (Часть №. 3104G25DA6T). This is the complete, high-performance, lightweight wheel-end system for the *centre* (или “forward”) drive axle of the FAW Jiefang CA4251P66K24T1A3E5 6×4 diesel semi-trailer tractor.

The FAW Central Wheel Hub Assembly Aluminium Rim is a sophisticated, pre-set “unitized” hub. Its “logic” is to provide a low-friction, high-strength rotating mount for the “dual-wheel” **Aluminium Rim** setup. This assembly must support the entire dynamic *and* static payload of the trailer, house the ‘Rear brake drum’ (3502571-A6T), and contain the ‘ABS ring’ (10041090) for the anti-lock braking system.

This in-depth guide is an essential resource for professional driveline technicians and fleet managers. We will deconstruct the entire FAW Central Wheel Hub Assembly Aluminium Rim into its 13 serviceable components, including the main ‘Hub’ (10045312), the ConMet ‘Bearings’ (Inner and Outer), the ‘Oil seal’ (10080112), and the critical ‘Bearing spacer’ (10045316). The FAW Central Wheel Hub Assembly Aluminium Rim is a key component for modern fleet efficiency.

Core Component: The ‘Hub’ (10045312) – Drive vs. Steer

The heart of the FAW Central Wheel Hub Assembly Aluminium Rim is the ‘Hub’ (10045312). This is the main structural component, a massive, precision-machined casting (often ductile iron) that forms the rotating “wheel-end.” Этот “drive hub” is fundamentally different from the “steer hub” on the front axle.

While both hubs house the bearings, this rear hub has one additional, critical feature: it is internally splined. These splines are designed to engage with the splines of the ‘Half-Shaft’ (axle shaft, see Assembly 400). This is how the FAW Central Wheel Hub Assembly Aluminium Rim receives rotational torque from the differential, which it then transmits to the wheels via the 10 ‘Wheel studs’ (10001400).

The “Aluminium Rim” designation of the FAW Central Wheel Hub Assembly Aluminium Rim indicates this hub is designed for use with lightweight, forged aluminum wheels. Этот “logic” is a key performance choice: aluminum rims significantly reduce **unsprung weight** (weight not supported by the suspension). This reduction allows the suspension to react faster, improving tire-to-road contact, increasing ride quality, and reducing wear. They also reduce overall vehicle weight, which can improve fuel economy and increase available payload. This assembly also provides the mounting face for the ‘Rear brake drum’ (3502571-A6T). The FAW Central Wheel Hub Assembly Aluminium Rim is built for performance.

The “Unitized” Bearing Logic (ConMet System)

The “logic” of this specific FAW Central Wheel Hub Assembly Aluminium Rim lies in its advanced, “unitized” bearing system. The parts are all sourced from ConMet (康迈公司), a leader in hub-end technology. The key components are:

• **’Outer bearing’ (10045483 / 10045313):** The two-part tapered roller bearing at the outer end of the hub. (ConMet 33019 / 33021)
• **’Inner bearing’ (10045759 / 10045314):** The larger, main load-bearing tapered roller bearing at the inner end of the hub. (ConMet 33019 / 33021)
• **’Bearing spacer’ (10045316):** The critical component that sets this assembly apart.

In a traditional FAW Central Wheel Hub Assembly Aluminium Rim, these two bearings are “loose.” A technician must tighten the main axle nut to a precise, *low-torque* “preload” specification, usually while spinning the hub. This process is difficult, time-consuming, and a common source of errors (over-tightening leads to bearing seizure; under-tightening leads to “wobble” and failure).

This ConMet system’s “logic” is different. The ‘Bearing spacer’ is a precision-ground, “matched” spacer that is engineered to be the *exact* width needed to set the perfect preload. The technician installs the inner bearing, the spacer, and the outer bearing. Then, they simply tighten the main axle nut to a very *high*, fixed torque. The spacer absorbs this torque, automatically setting the bearing preload to the perfect factory specification. This eliminates guesswork, dramatically increases bearing life, and simplifies service for the FAW Central Wheel Hub Assembly Aluminium Rim. A robust FAW Central Wheel Hub Assembly Aluminium Rim is key to fleet uptime.

Critical Sealing: The ‘Oil Seal’ (10080112) and ‘Hub Cap’ (10036508)

The bearings in the FAW Central Wheel Hub Assembly Aluminium Rim are lubricated by heavy-duty axle/gear oil. The ‘Oil seal (Cummins)’ (10080112) is the single most critical component for keeping this oil *in* and keeping water, пыль, and road grime *out*.

This is a high-tech, multi-lip radial shaft seal. It is pressed into the back of the ‘Hub’ (10045312), and its flexible, spring-loaded lips ride on the ‘Seal seat’ (3104044-A6T), a polished “wear ring” on the main axle housing.

A failure of this one seal in the FAW Central Wheel Hub Assembly Aluminium Rim is a catastrophic event. If it leaks oil *out*, the ‘Inner’ and ‘Outer’ bearings will run dry, overheat, and seize, which can cause the entire wheel to lock up or detach from the vehicle. If it leaks *in*, water will contaminate the oil, causing the bearings to rust and “spall” (flake apart). This is why the ‘O-ring’ (3104066-A6T-C00) is also used to ensure the ‘Seal seat’ is locked in place.

The ‘Oil filler plug’ (10036508) is the “hub cap” или “масляная заглушка” that seals the *outer* end of the FAW Central Wheel Hub Assembly Aluminium Rim. This component (often with a clear “sight glass”) allows a technician to visually inspect the oil level and condition without having to disassemble the hub, which is a key service “logic.” Proper sealing is essential for the FAW Central Wheel Hub Assembly Aluminium Rim.

The ABS Logic: ‘ABS Ring’ (10041090)

The “logic” of the FAW Central Wheel Hub Assembly Aluminium Rim‘s braking system is contained in the ‘ABS ring (Cummins)’ (10041090). This is the “tone ring” for the Anti-lock Braking System.

This is a “toothed” metal ring that is pressed onto the ‘Hub’ (10045312). As the wheel rotates, the teeth of this ring fly past the ‘Wheel speed sensor’ (a separate part). Этот “chopping” of the magnetic field creates a digital pulse, which is sent to the truck’s ABS computer.

The ABS computer uses this pulse to know the exact rotational speed of the wheel. If the driver “panic brakes” and the computer sees this ring suddenly *stop* (indicating a locked wheel), it will instantly “pump” the ‘Rear brake drum’ (3502571-A6T), allowing the wheel to regain traction. Этот “anti-lock” logic is a critical safety feature, and it is entirely dependent on the integrity of this ‘ABS ring’ within the FAW Central Wheel Hub Assembly Aluminium Rim.

The FAW Central Wheel Hub Assembly Aluminium Rim (3104G25DA6T) is a complete, pre-assembled, and pre-lubricated unit designed for minimal maintenance and maximum on-road life. Its integration of the ConMet pre-set bearing “logic” is a significant step up from older, manually-adjusted wheel hubs. The FAW Central Wheel Hub Assembly Aluminium Rim is truly a modern, high-performance component.

FAW Central Wheel Hub Assembly Aluminium Rim Parts List

The following table provides the complete, detailed breakdown of all 13 components identified in the ‘Central Wheel Hub Logic Assembly Aluminium Rim’ (528) diagram for the FAW CA4251P66K24T1A3E5 tractor.

Technical Specifications and Assembly Context

The specifications for the FAW Central Wheel Hub Assembly Aluminium Rim are defined by its function as a unitized, low-friction, high-load wheel-end for a drive axle. Этот FAW Central Wheel Hub Assembly Aluminium Rim is a key component for safety and performance.