FAW Front Wheel Hub Logic Assembly: Deconstructing the 10 Critical Components

Welcome to this critical deconstruction of the FAW Front Wheel Hub Logic Assembly (Part No. 3103601-98R). This is the complete, load-bearing wheel-end system for the front steer axle of the FAW Jiefang CA4251P66K24T1A3E5 6×4 diesel semi-trailer tractor. This assembly is the rotating foundation for the wheel and brake system.

The FAW Front Wheel Hub Logic Assembly is a sophisticated, pre-set “unitized” hub. Its “logic” is to provide a low-friction, high-strength rotating mount for the front wheel. This assembly must support the entire dynamic weight of the front-end, provide the rotating surface for the ‘Front brake drum’ (3501571-98R), and house the ‘ABS ring’ (10037801) 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 Front Wheel Hub Logic Assembly into its 10 serviceable components, including the main ‘Hub’ (10080596), the ‘Inner’ (10026058) and ‘Outer’ (10041099) bearings, and the critical ‘Oil seal’ (10080107).

Core Component: The ‘Hub’ (10080596)

The heart of the FAW Front Wheel Hub Logic Assembly is the ‘Hub’ (10080596). 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” (the outer rings) for the ‘Outer bearing’ (10041099) and ‘Inner bearing’ (10026058). Second, it features the 10 ‘Wheel studs’ (10023593) that the wheel is bolted to. Third, the ‘Brake drum’ (3501571-98R) mounts to its inner face.

This ‘Hub’ is the central rotating mass of the FAW Front Wheel Hub Logic Assembly, and it must be perfectly balanced and machined to prevent any “wobble” or “runout,” which would cause severe vibration and uneven brake wear.

The “Unitized” Bearing Logic (ConMet)

The “logic” of this specific FAW Front Wheel Hub Logic Assembly 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’ (10041099):** The smaller tapered roller bearing at the outer end of the hub.
• **’Inner bearing’ (10026058):** The larger, main load-bearing tapered roller bearing at the inner end of the hub.
• **’Bearing spacer’ (10023828):** The critical component.

In a traditional FAW Front Wheel Hub Logic Assembly, these two bearings are “loose.” A technician must tighten the main ‘Axle head lock nut’ (3001060AA8S-C00) to a precise, *low-torque* “preload” specification, usually while spinning the hub. This process is difficult and a common source of errors.

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 ‘Axle head lock 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.

Critical Sealing: The ‘Oil Seal’ (10080107) and ‘Hub Cap’ (3103065AA8S-C00)

The bearings in the FAW Front Wheel Hub Logic Assembly are lubricated by heavy-duty hub oil (or semi-fluid grease). The ‘Oil seal (Cummins)’ (10080107) is the single most critical component for keeping this oil *in* and keeping water and dirt *out*.

This is a high-tech, multi-lip radial shaft seal. It is pressed into the back of the ‘Hub’ (10080596), and its flexible, spring-loaded lips ride on a polished “wear ring” on the main axle spindle (from Assembly 510).

A failure of this one seal in the FAW Front Wheel Hub Logic Assembly 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* (e.g., in heavy rain or a puddle), water will contaminate the oil, causing the bearings to rust and “spall” (flake apart), leading to the same failure.

The ‘Hub cap assembly’ (3103065AA8S-C00) seals the *outer* end of the FAW Front Wheel Hub Logic Assembly. It is a sealed cap with a clear “sight glass,” allowing a technician to visually inspect the oil level and condition without having to disassemble the hub. This “logic” of easy inspection is key to preventive maintenance.

The ABS Logic: ‘ABS Ring’ (10037801)

The “logic” of the FAW Front Wheel Hub Logic Assembly‘s braking system is contained in the ‘ABS ring (Cummins)’ (10037801). This is the “tone ring” for the Anti-lock Braking System.

This is a “toothed” metal ring that is pressed onto the ‘Hub’ (10080596). As the wheel rotates, the teeth of this ring fly past the ‘Wheel speed sensor’ (3550360-6S, from Assembly 510). 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 ‘Front brake drum’ (3501571-98R), 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 Front Wheel Hub Logic Assembly. A cracked or dirt-fouled ring will disable the ABS and traction control systems, triggering a warning light.

FAW Front Wheel Hub Logic Assembly Parts List

The following table provides the complete, detailed breakdown of all 10 components identified in the ‘Front Wheel Hub Logic Assembly’ (523) diagram for the FAW CA4251P66K24T1A3E5 tractor.

Technical Specifications and Assembly Context

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