FAW J6P Rear Suspension: Deconstructing 45 Critical Parts for Maximum Load Stability

This is an in-depth technical deconstruction of the FAW J6P Rear Suspension system for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This comprehensive guide details the 45 serviceable components, from the robust multi-leaf spring packs to the complex balance beams and anti-roll limiters that ensure stability under extreme loads.

The FAW J6P Rear Suspension is an extremely robust, multi-leaf spring and balance beam system, engineered for the demanding loads and harsh terrain typically encountered by a 6×4 dump truck. Its primary purpose is to evenly distribute the massive payload across the tandem rear axles, provide reliable traction, and absorb severe impacts, all while maintaining vehicle stability. This advanced design ensures minimal stress on the chassis and maximizes the operational lifespan of the vehicle. A well-maintained FAW J6P Rear Suspension is paramount for safety, load capacity, and driver comfort, making its components critical for sustained performance. We will analyze the main leaf spring assemblies, the complex balance beam system, and the crucial limiting and damping components. Each element of the FAW J6P Rear Suspension contributes to the overall stability and performance of the vehicle.

Core 1: The “Multi-Leaf” Logic (The Main Spring Packs)

This section covers the primary load-bearing components of the FAW J6P Rear Suspension – the leaf spring assemblies. These robust packs are designed to manage the substantial weight of the dump body and its contents.

1. Component: ‘Rear leaf spring assy’ (2912010-483J) – Qty 2
This (Comp 4) is the complete rear leaf spring assembly. Two of these are used, one per side, to support the rear of the truck. Each assembly is comprised of multiple individual leaves (from ‘2912201-483J’ to ‘2912212-483J’). The Multi-Leaf Logic provides a progressive spring rate, becoming stiffer as the load increases. This is essential for the FAW J6P Rear Suspension to provide a stable ride both empty and fully laden.

2. Component: ‘Center bolt – rear leaf spring’ (2912161-483) – Qty 2
This (Comp 5, part of 4) is the critical bolt that holds the entire leaf spring pack together, ensuring all individual leaves are correctly aligned. This bolt also serves as the locator pin, fitting into the axle pad to prevent the axle from shifting. The integrity of this bolt is vital for the entire FAW J6P Rear Suspension system.

3. Component: ‘Clamps’ & ‘Spacers’ (2912135-483J, 2912136-483, 2912171-03)
This group (all part of Comp 4) includes the ‘Clamp’ assemblies and ‘Spacers’ that bind the leaves together. These clamps (e.g., ‘Clamp – rear leaf spring 11th leaf’) prevent the individual leaves from fanning out or separating, which would cause the pack to lose its structural integrity. These are crucial for the long-term durability of the FAW J6P Rear Suspension.

Core 2: The “Axle Mounting” Logic (U-Bolt System)

This group of components securely fastens the leaf springs to the axles. The clamping force generated by this system is all that holds the tandem axles in place, making it one of the most critical parts of the FAW J6P Rear Suspension.

1. Component: ‘U-bolt – rear leaf spring’ (2912411-71B) – Qty 4
These (Comp 2) are the primary fasteners. Four of these heavy-duty U-bolts (two per side) loop under the axle housing and pass up through the cover plate. These must be torqued to an exact specification.

2. Component: ‘Nut – for U-bolt’ (2912413-260) – Qty 8
This (Comp 1) is the high-strength nut designed to secure the U-bolts. These are often ‘tall’ nuts to ensure maximum thread engagement and clamping force, which is essential for the FAW J6P Rear Suspension.

3. Component: ‘Cover plate – rear leaf spring’ (2912406X487) – Qty 2
This (Comp 3) is a thick steel plate positioned above the leaf spring. The Clamping Force Logic is that this plate distributes the load from the U-bolt nuts evenly across the spring pack, preventing the nuts from crushing the spring and ensuring a rigid connection. The entire FAW J6P Rear Suspension‘s alignment depends on this.

4. Component: ‘Rear leaf spring soft pad’ (2912434-65B) – Qty 4
This (Comp 42) is a soft pad, likely made of high-density rubber or polyurethane. It sits between the leaf spring pack and the axle housing. Its purpose is to absorb high-frequency vibrations and prevent metal-on-metal contact, reducing noise and shock transfer to the FAW J6P Frame.

Core 3: The “Balance Beam” Logic (Tandem Articulation)

This complex system is the heart of the tandem-axle FAW J6P Rear Suspension. It allows the two rear axles to articulate, keeping all eight rear tires in contact with uneven ground for maximum traction and stability.

1. Component: ‘Balance beam & balance beam support assy’ (2918010-96AJ) – Qty 2
This (Comp 34) is the main “trunnion” assembly. It is the large cast or fabricated beam that pivots on a central point mounted to the frame. The leaf springs (Comp 4) connect to the ends of this beam, not directly to the frame. This Tandem Axle Logic allows one axle to rise while the other falls, “walking” over obstacles.

2. Component: ‘Bush – balance beam support pad’ (2918042-260) – Qty 2
These (Comp 12) are massive, high-density rubber bushings that are pressed into the balance beam support. The entire load of the rear of the truck pivots on these two bushings. They must absorb immense loads and vibrations, making them a critical wear item in the FAW J6P Rear Suspension.

3. Component: ‘Pad – balance beam support’ (2918072-626) & ‘Bushing’ (2918017-626 / 2918041A260)
This (Comp 6, 7, 10) is the set of pads and bushings that form the upper and lower covers of the trunnion assembly, creating a serviceable, greaseable pivot point for the FAW J6P Rear Suspension.

Core 4: The “Reaction & Limit” Logic (Stability Control)

This final group includes the reaction rods (torque rods) and limiters that control axle positioning. They prevent the axles from moving fore/aft during acceleration and braking and limit extreme suspension travel.

1. Component: ‘Anti-roll rod with rubber bushing assy’ (2919005B71B, 2919015B71B, etc.) – Qty 6
This (Comp 19, 20, 24, 25) is the set of “reaction rods”. The Torque Rod Logic is to prevent the axles from rotating (axle wrap). These rods form a geometric link between the axle and the FAW J6P Frame, absorbing the braking and acceleration torque. This is a key part of the FAW J6P Rear Suspension.

2. Component: ‘Limit support – buffer’ (2912437-69C) – Qty 4
These (Comp 43) are the “bump stops”. They are essential safety components that prevent the suspension from over-compressing, which would cause the frame to impact the axle. This protects the FAW J6P Rear Suspension components and the frame from catastrophic damage during a hard impact.

3. Component: ‘Left/Right lateral limit plate’ (2912437-90BJ, 2912438-90BJ) – Qty 1 each
These (Comp 44, 45) plates are designed to prevent excessive lateral (side-to-side) movement of the axles. This is crucial for maintaining vehicle stability, especially during cornering or when on a side slope with a heavy load. They directly contribute to the stability of the FAW J6P Rear Suspension.

FAW J6P Rear Suspension: Complete 45-Part Breakdown

The following table provides the complete, detailed breakdown of all 45 component types in the FAW J6P Rear Suspension assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This extensive list is crucial for ordering genuine spare parts and ensuring correct maintenance and repair procedures for the FAW J6P Rear Suspension.

Core Specifications

The specifications for the FAW J6P Rear Suspension are characterized by its heavy-duty multi-leaf springs and balance beam design, meticulously engineered to handle the immense payloads and harsh operating conditions of the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. The FAW J6P Rear Suspension is crucial for stable and safe heavy-duty operation.