FAW J6P Front Wheel Hub: Deconstructing 18 Critical Parts for Flawless Rotation

This is a complete technical deconstruction of the FAW J6P Front Wheel Hub (Model 3103010-4E) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This guide details the 18 serviceable component types, from the hub casting and tapered roller bearings to the spindle adjustment nuts and seals.

The FAW J6P Front Wheel Hub is a critical, high-stress assembly that forms the rotating foundation for the front steer axle. Its primary functions are to support the entire vertical load of the truck’s front end, provide a rigid mounting point for the wheel and the brake drum, and rotate freely on the steering knuckle spindle with minimal friction. In a heavy-duty dump truck, the FAW J6P Front Wheel Hub must be over-engineered to withstand constant high-g impacts from rough terrain and the immense braking forces required to stop a fully-loaded vehicle. This deconstruction will analyze the core components of the FAW J6P Front Wheel Hub, including the bearing sets, the sealing system, and the wheel mounting hardware. A properly serviced FAW J6P Front Wheel Hub is essential for steering safety, 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 Front Wheel Hub. It includes the main hub casting and the critical bearings that support the load.

1. Component: ‘Front wheel hub’ (3103011-4E) – Qty 2
This (Comp 1) is the main body of the FAW J6P Front Wheel Hub. It is a massive, single-piece casting made of high-strength iron or steel. It is designed to house the two bearing races, provide a mounting flange for the brake drum (Comp 18), and hold the 10 ‘Stud bolts’ (Comp 3) for the wheel. Its structural integrity is non-negotiable.

2. Component: Bearing Assemblies (30314B, 30314A, 30311) – Qty 2 each (Inner/Outer)
This (Comp 6 & 7) is the set of tapered roller bearings. The FAW J6P Front Wheel Hub uses two of these bearings per side: a large ‘Inner bearing assy’ (Comp 6/7) and a smaller outer bearing (Comp 9). Each bearing consists of an ‘Outer race’ (Comp 6-1/7-1) pressed into the hub and an ‘Inner cone assy’ (Comp 6-2/7-2) that slides onto the spindle.

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

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

This group of components is responsible for securely fastening the road wheel to the FAW J6P Front Wheel Hub. The clamping force of this system is critical to safety.

1. Component: ‘Stud bolt – front wheel hub’ (3103051-4EB1) – Qty 20
This (Comp 3) is a set of 10 high-tensile steel studs (per hub) that are pressed into the back of the FAW J6P Front Wheel Hub flange. These studs are what the wheel slides onto. They are designed to be a tight, press-fit and are only replaced if the threads are damaged or the stud is broken.

2. Component: ‘Wheel nut and washer assy’ (3103070-4E) – Qty 20
This (Comp 4) is the main nut that secures the wheel. It’s an assembly that includes a captive, conical washer. The Clamping Force Logic is that as the nut is tightened, the washer spins freely, preventing the nut from galling the surface of the aluminum or steel wheel. This allows for a much higher and more accurate torque specification, ensuring the wheel is perfectly centered and secured to the FAW J6P Front Wheel Hub.

3. Component: ‘Hex thick nut’ (CQ36120T) – Qty 20
This (Comp 5) is listed as a ‘Hex thick nut’. This is often used in a dual-wheel setup, but in this FAW J6P Front Wheel Hub context, it may be a “jam nut” or part of a two-piece nut system, providing a redundant locking mechanism to prevent the main wheel nut from backing off.

Core 3: The “Sealing & Pre-load” Logic (Spindle Hardware)

This group of components seals the FAW J6P Front Wheel Hub and provides the critical mechanism for setting the bearing pre-load.

1. Component: Sealing System (3103045-4E, 3103066-4E, 3103067-4EA1)
This (Comp 2, 10, 11) is the complete sealing solution. The ‘Oil seal assy’ (Comp 2) is a large, spring-loaded seal pressed into the *back* of the FAW J6P Front Wheel Hub to keep grease in and water/dirt out. The ‘Cap – front wheel hub’ (Comp 10) and its ‘Gasket’ (Comp 11) seal the *front* of the hub. A failure in this system will lead to rapid bearing destruction.

2. Component: Bearing Adjustment Group (3001061-367, 3001064-A0S, 3001063-A0S)
This (Comp 15, 16, 14) is the spindle nut assembly. The Bearing Pre-load Logic is the most critical service procedure for the FAW J6P Front Wheel Hub. A technician tightens the ‘Adjustment nut’ (Comp 15) to a specific torque to set the correct “squeeze” on the bearings. The ‘Lock washer’ (Comp 16) is then bent into a groove on the nut, and the ‘Lock ring’ (Comp 14) slides over it.

3. Component: ‘Screw and wave washer’ (3001066-A0S) – Qty 6
This (Comp 17) is the final locking mechanism. These screws pass through the lock ring (Comp 14) and into the adjustment nut (Comp 15), providing a redundant, positive lock. This ensures the pre-load setting on the FAW J6P Front Wheel Hub cannot change during operation.

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

This component is not part of the FAW J6P Front Wheel Hub itself, but is a critical partner, as it mounts directly to it.

1. Component: ‘Front brake drum’ (3501571-4E) – Qty 2
This (Comp 18) is the heavy cast-iron drum that the brake shoes press against to stop the truck. It slides over the 10 wheel studs (Comp 3) and is sandwiched between the FAW J6P Front Wheel Hub flange and the road wheel.

2. Component: ‘Hex head guide bolt’ (CQ1500816) & ‘Spring washer’ (Q40308) – Qty 10 each
This (Comp 12, 13) is the hardware for the brake drum. The Drum Mounting Logic is that these small bolts and washers are used to hold the brake drum (Comp 18) onto the FAW J6P Front Wheel Hub *before* the wheel is installed. This prevents the heavy drum from falling off during a tire change and makes wheel mounting easier. The primary clamping force is provided by the main wheel nuts.

FAW J6P Front Wheel Hub: Complete 18-Part Breakdown

The following table provides the complete, detailed breakdown of all 18 component types in the FAW J6P Front Wheel Hub assembly (3103010-4E) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This list is essential for any service of the FAW J6P Front Wheel Hub.

Core Specifications

The specifications for the FAW J6P Front Wheel Hub are defined by its heavy-duty components and precision adjustment system, designed for the demanding steering and load-bearing requirements of the CA3250P66K2L1T1E dump truck. A FAW J6P Front Wheel Hub must be serviced to exact torque specifications.