FAW Rear Wheel Hub Assembly Aluminium Rim: A Critical Focus on 13 Serviceable Components

Welcome to this critical technical guide on the FAW Rear Wheel Hub Assembly Aluminium Rim (Part No. 3104G24DA6T). This is the complete, high-performance, lightweight wheel-end system for the *drive axles* of the FAW Jiefang CA4251P66K24T1A3E5 6×4 diesel semi-trailer tractor.

The FAW Rear 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” 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 wheel-end technicians and fleet managers. We will deconstruct the entire FAW Rear Wheel Hub Assembly Aluminium Rim into its 13 serviceable components, including the main ‘Hub’ (10045312), the ‘Inner’ and ‘Outer’ bearings (from ConMet), and the critical ‘Oil seal’ (10080112).

Core Component: The ‘Hub’ (10045312) and ‘Rim’

The heart of the FAW Rear 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.” This is *not* the “rim” (the part the tyre mounts to), but the “hub” that the rim bolts *onto*.

This ‘Hub’ has several critical functions. First, it houses the “races” for the ‘Outer bearing’ (10045483) and ‘Inner bearing’ (10045759). Second, it features the 10 ‘Wheel studs’ (10001400) that the dual-wheel assembly is bolted to. Third, the ‘Rear brake drum’ (3502571-A6T) mounts to its inner face, and the ‘ABS ring’ (10041090) is pressed onto it.

The “Aluminium Rim” part of the FAW Rear Wheel Hub Assembly Aluminium Rim refers to the “wheel” itself (like Part No. 3101015A4E from Assembly 512, which mounts to this hub). Using an aluminum rim instead of steel is a “logic” choice for reducing **unsprung weight**. Lighter wheels respond faster to bumps, improving ride quality and handling. They also reduce overall vehicle weight, improving fuel economy and increasing potential payload. This entire FAW Rear Wheel Hub Assembly Aluminium Rim is the complete rotating mass.

The “Unitized” Bearing Logic (ConMet System)

The “logic” of this specific FAW Rear 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.
• **’Inner bearing’ (10045759 / 10045314):** The larger, main load-bearing tapered roller bearing at the inner end of the hub.
• **’Bearing spacer’ (10045316):** The critical component that sets this assembly apart.

In a traditional FAW Rear 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 Rear Wheel Hub Assembly Aluminium Rim.

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

The bearings in the FAW Rear 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, dust, 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 Rear 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 ‘Seal retaining ring’ (3104066-A6T-C00) is also used to ensure the seal is locked in place.

The ‘Oil filler plug’ (10036508) is the “hub cap” or “oil plug” that seals the *outer* end of the FAW Rear 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.”

The ABS Logic: ‘ABS Ring’ (10041090)

The “logic” of the FAW Rear 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). This “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. This “anti-lock” logic is a critical safety feature, and it is entirely dependent on the integrity of this ‘ABS ring’ within the FAW Rear Wheel Hub Assembly Aluminium Rim.

FAW Rear Wheel Hub Assembly Aluminium Rim Parts List

The following table provides the complete, detailed breakdown of all 13 components identified in the ‘Rear Wheel Hub Assembly Aluminium Rim’ (524) diagram for the FAW CA4251P66K24T1A3E5 tractor.

Technical Specifications and Assembly Context

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