FAW J6P Brake Drum: Deconstructing 18 Critical Parts for Flawless Stopping Power

This is a complete technical guide to the FAW J6P Brake Drum and its associated front wheel hub assembly (3103010-4E) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This deconstruction analyzes the 18 serviceable parts that form the entire rotating assembly, which is critical for both braking and load-bearing.

The FAW J6P Brake Drum (Part No. 3501571-4E) is a heavy-duty, cast-iron component that provides the primary friction surface for the front axle’s braking system. In a fully-loaded dump truck, its ability to absorb and dissipate immense heat is critical for vehicle safety. This component does not work in isolation; it is a key part of the entire front wheel hub assembly. This deconstruction will analyze the FAW J6P Brake Drum itself, as well as the wheel hub that supports it, the bearings that allow it to rotate, and the seals that protect it. A properly serviced FAW J6P Brake Drum and hub assembly is essential for safe, reliable operation.

Core 1: The “Brake Drum” Logic (The Friction Component)

This is the primary component referenced in the FAW J6P Brake Drum system. It is the large, heavy, cast-iron ring that rotates with the wheel.

1. Component: ‘Front brake drum’ (3501571-4E) – Qty 2
This (Comp 18) is the FAW J6P Brake Drum itself. It is a massive, single-piece casting designed to absorb and dissipate the extreme heat generated during braking. The Friction Surface Logic is critical: its inner diameter is precision-machined to a perfectly round, smooth surface for the brake shoes to press against. Any out-of-roundness, “hot spots,” or cracks in this FAW J6P Brake Drum will cause severe braking vibration, reduced stopping power, and potential failure.

2. Component: Mounting Hardware (CQ1500816, Q40308) – Qty 10 each
This (Comp 12, 13) is the dedicated mounting hardware for the FAW J6P Brake Drum. This includes ‘Hex head guide bolts’ (Comp 12) and ‘Spring washers’ (Comp 13). These small bolts are used to hold the drum onto the ‘Front wheel hub’ (Comp 1) during assembly and service, preventing the heavy drum from falling off when the wheel is removed. The FAW J6P Brake Drum is ultimately held in place by the main wheel studs, but these bolts are critical for alignment and service.

Core 2: The “Hub Foundation” Logic (The Rotating Body)

The FAW J6P Brake Drum cannot function without being rigidly mounted to the wheel hub. This group of components forms the rotating foundation that the drum and wheel are bolted to.

1. Component: ‘Front wheel hub’ (3103011-4E) – Qty 2
This (Comp 1) is the main body of the ‘Front wheel hub assy’ (3103010-4E). It is a massive iron casting that houses the bearings and provides the mounting flange for both the FAW J6P Brake Drum and the road wheel.

2. Component: ‘Stud bolt – front wheel hub’ (3103051-4EB1) – Qty 20
This (Comp 3) is the set of 10 (per hub) high-tensile studs that are pressed into the hub. The FAW J6P Brake Drum (Comp 18) and the road wheel slide onto these studs.

3. Component: ‘Wheel nut and washer assy’ (3103070-4E) & ‘Hex thick nut’ (CQ36120T) – Qty 20 each
This (Comp 4, 5) is the hardware that holds the wheel onto the hub. The Clamping Force Logic is that these nuts are tightened to a high torque, sandwiching the FAW J6P Brake Drum between the wheel and the hub flange. This ensures all three components rotate as a single, solid unit.

Core 3: The “Bearing” Logic (The Load-Bearing System)

This group of components allows the FAW J6P Brake Drum and hub assembly to rotate freely on the stationary axle spindle, while supporting the entire front-end load.

1. Component: Bearing Assemblies (30314B, 30314A, 30311) – Qty 2 each (Inner/Outer)
This (Comp 6, 7, 8, 9) is the set of tapered roller bearings. The assembly uses a large ‘Inner bearing assy’ (Comp 6/7) and a smaller ‘Outer bearing assy’ (Comp 8/9). Each bearing consists of an outer race pressed into the hub and an inner cone that rides on the spindle.

The Tapered Roller Logic is critical. These bearings are designed to handle both radial loads (vertical weight) and axial loads (side forces from cornering). The rotational smoothness of the FAW J6P Brake Drum is entirely dependent on these bearings being properly lubricated and adjusted.

Core 4: The “Sealing & Adjustment” Logic (Spindle Hardware)

This group contains the components that seal the hub assembly and provide the critical mechanism for setting the bearing pre-load, which is essential for the life of the FAW J6P Brake Drum and hub.

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 hub to protect the inner bearing. The ‘Cap – front wheel hub’ (Comp 10) and its ‘Gasket’ (Comp 11) seal the front of the hub. A failed seal will destroy the bearings, leading to hub failure and a non-functional FAW J6P Brake Drum.

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. 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) and ‘Lock ring’ (Comp 14) are then used to secure this setting.

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 Brake Drum‘s bearings cannot change during operation, preventing wheel wobble and brake inefficiency.

FAW J6P Brake Drum & Hub: Complete 18-Part Breakdown

The following table provides the complete, detailed breakdown of all 18 component types in the FAW J6P Brake Drum and 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 Brake Drum.

Core Specifications

The specifications for the FAW J6P Brake Drum and hub are defined by its heavy-duty components and precision adjustment system, designed for the steering and braking requirements of the CA3250P66K2L1T1E dump truck. A FAW J6P Brake Drum must be serviced to exact torque specifications.