FAW Wheel And Tyre Assembly: Deconstructing the 4 Critical Component Groups

Welcome to this critical technical guide on the FAW Wheel And Tyre Assembly (Part No. 3101010-75S). This is the complete, road-contacting assembly for the FAW Jiefang CA4251P66K24T1A3E5 6×4 diesel semi-trailer tractor. This component is the final link in the powertrain, responsible for supporting the entire vehicle load and providing all traction and braking forces.

The FAW Wheel And Tyre Assembly is a complete, pre-mounted unit, specified here as a 12R22.5 18-ply radial tyre on a 22.5×9.00 wheel. Its “logic” is to provide a durable, high-load-capacity, and safe connection to the road surface, while also being serviceable for balancing and inflation.

This in-depth guide is an essential resource for professional technicians, fleet managers, and parts specialists. We will deconstruct the entire FAW Wheel And Tyre Assembly into its 4 main serviceable component groups, including the high-load-range ‘tyre’, the ‘wheel rim’, the high-pressure ‘valve assembly’, and the critical ‘balance weights’ needed for smooth operation.

Core Component 1: The Tyre (3106010-15W)

The first serviceable component of the FAW Wheel And Tyre Assembly is the ’12R22.5 18-ply radial tyre’ (3106010-15W). This is the “logic” of the assembly’s load-carrying capacity. Let’s deconstruct its designation:

• **12R22.5:** This defines the size. “12” is the nominal width of the tyre in inches. “R” stands for **Radial Construction**, which is the modern standard for truck tires. It means the plies run radially (at 90 degrees) from bead to bead, providing a flexible sidewall for a smoother ride and lower rolling resistance. “22.5” is the diameter of the wheel (rim) in inches.
• **18-ply:** This is the most critical specification for a heavy-duty FAW Wheel And Tyre Assembly. “18-ply” is the Load Range “J” (LRJ). This indicates an extremely strong, reinforced casing and sidewall designed to be inflated to a high pressure (e.g., 120 PSI) and safely carry the immense loads of a fully-laden semi-trailer. Using a lower-ply-rated tyre (like a 14-ply) would result in catastrophic tyre failure (a “blowout”) under load.

This is a “tubeless” tyre, designed to create an airtight seal directly against the wheel rim, which is a key feature of the modern FAW Wheel And Tyre Assembly.

Core Component 2: The Wheel Rim (3101015A4E)

The ‘22.5×9.00 wheel rim & hub assembly’ (3101015A4E) is the structural “skeleton” of the FAW Wheel And Tyre Assembly. This is the heavy-duty steel (or sometimes forged aluminum) wheel that the tyre is mounted on.

Its size, **22.5×9.00**, is critical. The “22.5” inch diameter must exactly match the tyre. The “9.00” inch width is the specified rim width for a 12R tyre, ensuring the tyre’s “beads” are properly seated for a safe, airtight seal. This assembly is broken down into its two welded components: the ‘wheel rim (section)’ (3101021A4E), which is the outer “hoop,” and the ‘wheel hub/disc’ (3101036A4E), which is the center disc that bolts to the truck’s axle.

This wheel is a “hub-piloted” design, meaning it is centered on the axle by the large center bore, not by the lug nuts (as in older “stud-piloted” systems). This provides a more accurate, vibration-free mounting. A bent or cracked rim is a critical failure of the FAW Wheel And Tyre Assembly, as it will not hold air and will cause a dangerous wheel “wobble.”

Core Component 3: The Valve Stem (3101055A4E)

The ‘V3.20.12 (ETRTO code) Tubeless inner tube valve assy for trucks’ (3101055A4E) is the high-pressure valve stem. This is not the small, rubber “snap-in” valve seen on a passenger car. This is a heavy-duty, all-metal (brass and steel) “bolt-in” valve assembly.

Its “logic” is to reliably hold the 100-120 PSI of air pressure required by the 18-ply tyre. It is mounted through a hole in the wheel rim and sealed with high-pressure rubber grommets and a locking nut. This creates a permanent, durable seal that can withstand the extreme heat from braking and the high centrifugal forces.

A failure of this valve in the FAW Wheel And Tyre Assembly would result in a rapid, if not catastrophic, loss of air pressure, leading to a “blowout” and a loss of vehicle control. It is a small, but critically important, safety component of the FAW Wheel And Tyre Assembly.

Core Component 4: The Balance Weights (3101060-1104 Series)

The final group in the FAW Wheel And Tyre Assembly is the ‘9.0 Balance weight assembly’ set (e.g., 3101060-1104, 3101065-1104, 3101085-1104 50G, etc.). The parts list critically marks these as “按需” or “**As needed**.”

This is the “balancing logic” of the FAW Wheel And Tyre Assembly. No tyre and wheel are perfectly balanced from the factory; they will always have a “heavy spot.” When this heavy spot spins at highway speeds, it creates an “out-of-balance” force that causes the wheel to “hop” and “wobble.” This vibration is not just annoying to the driver; it is destructive, causing “cupped” tire wear and destroying the truck’s kingpins, wheel bearings, and steering components.

These “balance weights” are the solution. A technician places the entire FAW Wheel And Tyre Assembly on a “spin balancer,” which identifies the location and mass of the heavy spot. The technician then “counteracts” this by adding these weights (e.g., a ’50G’ or 50-gram weight) to the opposite side of the wheel rim.

The “9.0” designation refers to the 9.00-inch rim, ensuring the “clip-on” weight has the correct profile to securely attach to the rim flange. The “as needed” logic means that every FAW Wheel And Tyre Assembly will require a different combination of these weights to achieve a perfect, smooth, and vibration-free ride.

FAW Wheel And Tyre Assembly Parts List

The following table provides the complete, detailed breakdown of all components identified in the ‘Wheel And Tyre Assembly’ (512) diagram for the FAW CA4251P66K24T1A3E5 tractor. This FAW Wheel And Tyre Assembly is a complete, road-ready unit.

Technical Specifications and Assembly Context

The specifications for the FAW Wheel And Tyre Assembly are defined by its function as a complete, heavy-duty, high-load wheel for a semi-trailer tractor. The FAW Wheel And Tyre Assembly is a safety-critical component.