FAW J6P Rear Wheel Hub: Deconstructing 9 Critical Parts for Flawless Power Transfer

This is a complete technical guide to the FAW J6P Rear Wheel Hub (Model 3104011-A6E) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This deconstruction analyzes 9 serviceable component types, from the main hub casting and tapered roller bearings to the high-strength studs and seals.

The FAW J6P Rear Wheel Hub is a foundational component of the tandem drive axle system. Unlike a front hub, this is a part of the drive axle, designed to transfer the immense torque from the axle shaft to the dual-wheel assembly. Its primary functions are to support the massive vertical payload, provide a rigid mounting point for the dual wheels and brake drum, and house the bearings that allow this assembly to rotate under power. In a 6×4 dump truck, the FAW J6P Rear Wheel Hub is subjected to extreme torque, shock loads, and contamination. This deconstruction will analyze the core components of the FAW J6P Rear Wheel Hub, including the bearing sets, the sealing system, and the wheel mounting hardware. A properly serviced FAW J6P Rear Wheel Hub is essential for drivetrain integrity, bearing life, and braking performance.

Core 1: The “Hub & Bearing” Logic (The Rotating Foundation)

This group represents the core rotating mass of the FAW J6P Rear Wheel Hub. It includes the main hub casting and the critical bearings that support the load and allow rotation on the axle housing.

1. Component: ‘Rear wheel hub’ (3104011-A6E) – Qty 4
This (Comp 1) is the main body of the FAW J6P Rear Wheel Hub. It is a massive, single-piece casting made of high-strength ductile iron. It is designed to house the two bearing races, provide a mounting flange for the ‘Rear brake drum’ (Comp 4), and hold the 10 ‘Stud bolts’ (Comp 2) for the dual-wheel assembly. Its structural integrity is paramount for handling the vehicle’s payload.

2. Component: ‘Tapered roller bearing’ (3104030-A6E-C00) – Qty 8 (4 sets)
This (Comp 5 & 8) is the set of tapered roller bearings. The FAW J6P Rear Wheel Hub uses two of these bearings per side (an inner and an outer bearing). The BOM lists this part number twice, indicating the inner and outer bearings may be the same size or are supplied as a set. Each bearing consists of an outer race pressed into the hub and an inner cone that slides onto the axle housing spindle.

The Tapered Roller Logic is critical. These bearings are designed to handle both immense radial loads (the vertical weight of the truck and payload) and axial loads (the side-forces from cornering) simultaneously. A properly functioning FAW J6P Rear Wheel Hub depends entirely on the health and proper pre-load of these bearings.

Core 2: The “Wheel Mounting” Logic (The Dual-Wheel Stud System)

This group of components is responsible for securely fastening the dual road wheels to the FAW J6P Rear Wheel Hub. The clamping force of this system is critical to safety and torque transfer.

1. Component: ‘Stud bolt – rear wheel hub’ (3104051-32T) – Qty 40
This (Comp 2) is a set of 10 high-tensile steel studs (per hub) that are pressed into the back of the FAW J6P Rear Wheel Hub flange. These studs are extra-long to pass through the brake drum, the inner wheel, the spacer, and the outer wheel. They are designed to be a tight, press-fit and are only replaced if the threads are damaged.

2. Component: ‘Wheel nut assy’ (3103070-32T) – Qty 40
This (Comp 3) is the main nut that secures the dual-wheel assembly. The Clamping Force Logic is that as this nut is tightened, it provides the massive clamping force required to hold both wheels and the FAW J6P Brake Drum (Comp 4) securely against the FAW J6P Rear Wheel Hub. Any loss of torque on these nuts can lead to wheel wobble and catastrophic failure of the FAW J6P Rear Wheel Hub studs.

Core 3: The “Sealing System” Logic (Bearing Protection)

This group of components is dedicated to protecting the tapered roller bearings (Comp 5 & 8) from contamination. On a dump truck, this is one of the most important systems, as the FAW J6P Rear Wheel Hub is constantly exposed to water, mud, and abrasive dust.

1. Component: ‘Rear hub outer oil seal assy (Style drawing)’ (3104055AA0E) – Qty 4
This (Comp 7) is the primary oil seal. This is a complex, pre-assembled cassette seal that is pressed into the back of the FAW J6P Rear Wheel Hub. It runs on a polished ‘Oil seal seat’ (Comp 6, 3104044AA0E) that is pressed onto the axle housing spindle. This seal is designed to keep the heavy gear oil *inside* the hub to lubricate the bearings.

2. Component: ‘O-ring’ (3104066-A6E-C00) – Qty 4
This (Comp 9) is a large O-ring. The Sealing Logic is that this O-ring likely seals the outer axle shaft flange (not pictured) to the FAW J6P Rear Wheel Hub. This prevents water and dirt from entering the hub from the outside and prevents oil from leaking out onto the wheels. A failure of this O-ring or the main seal (Comp 7) will lead to a rapid loss of lubrication and complete failure of the FAW J6P Rear Wheel Hub bearings.

Core 4: The “Brake Drum” Logic (The Braking Interface)

This component is the friction partner to the FAW J6P Rear Wheel Hub, responsible for stopping the vehicle.

1. Component: ‘Rear brake drum’ (3502571-A0E) – Qty 4
This (Comp 4) is the heavy cast-iron drum that the rear brake shoes press against. It slides over the 10 wheel studs (Comp 2) and is mounted “inboard” of the FAW J6P Rear Wheel Hub flange.

The Inboard Drum Logic means the FAW J6P Rear Wheel Hub must be completely removed from the axle spindle (by removing the axle shaft and spindle nuts) in order to service or replace the brake drum. While this is more labor-intensive, it creates a very strong and stable mounting. The FAW J6P Brake Drum‘s ability to absorb and dissipate heat is critical for the safety of a fully-loaded dump truck.

FAW J6P Rear Wheel Hub: Complete 9-Part Breakdown

The following table provides the complete, detailed breakdown of all 9 component types in the FAW J6P Rear Wheel Hub assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This list is essential for any service of the FAW J6P Rear Wheel Hub.

Core Specifications

The specifications for the FAW J6P Rear Wheel Hub are defined by its heavy-duty components and robust sealing system, designed for the tandem drive axles of the CA3250P66K2L1T1E dump truck. A FAW J6P Rear Wheel Hub must be serviced to exact torque specifications.