Mid-Bridge Bolted Suspension Bracket: Deconstructing 7 Critical Parts for Flawless Chassis Integrity

This is the technical deconstruction of the Mid-Bridge Bolted Suspension Bracket for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This guide details the 7 serviceable component types that form this critical chassis-to-axle link. This assembly is responsible for securing the leaf springs and reaction rods to the vehicle’s frame.

The Mid-Bridge Bolted Suspension Bracket is not a single part but a complete system of heavy-gauge steel brackets, shims, and high-tensile fasteners. Unlike welded components, this bolted assembly is designed for serviceability, allowing technicians to replace individual brackets or hardware that may wear or be damaged from extreme off-road use. This deconstruction will analyze the main spring brackets, the reaction rod brackets, and the specific fastener systems used to maintain the vehicle’s structural integrity under millions of load cycles. Understanding this Mid-Bridge Bolted Suspension Bracket is key to tandem-axle maintenance.

Core 1: The “Load-Bearing” Logic (The Main Spring Brackets)

This group represents the foundation of the Mid-Bridge Bolted Suspension Bracket. These are the primary components that transfer the vehicle’s load from the frame to the leaf springs of the middle axle.

1. Component: ‘Rear leaf spring bracket assy – mid’ (2912445-65B & 2912450-65B) – Qty 2 each
These (Comp 1 & 2) are the main, mirrored assemblies for the left and right sides of the frame. They are massive, fabricated steel brackets designed to house the leaf spring’s mounting pin. The Bolted Logic is key: these brackets are bolted *directly* to the truck’s frame rail using high-strength fasteners (Comp 3), allowing for replacement in case of stress fracturing. They are the primary load-transfer point for the Mid-Bridge Bolted Suspension Bracket system.

2. Component: ‘Hexagon head bolt with pin hole’ (CQ1512095T) – Qty 16
This (Comp 3) is a specialized, high-tensile fastener. The pin hole feature allows for a cotter pin or locking wire, providing a redundant safety mechanism. This Fastener Logic ensures that even under extreme vibration and torsional flex, the main nuts cannot back off. These 16 bolts are responsible for securing the main spring brackets (Comp 1 & 2) to the frame, making them critical to the Mid-Bridge Bolted Suspension Bracket‘s safety.

Core 2: The “Precision Alignment” Logic (Positioning Assembly)

This small but vital component group ensures the main spring brackets are perfectly aligned on the frame. Misalignment of the Mid-Bridge Bolted Suspension Bracket can lead to poor handling, severe tire wear, and ‘dog tracking’ of the tandem axles.

1. Component: ‘Shim and positioning pin assy – rear leaf spring bracket’ (2912405-65B) – Qty 4
This (Comp 4) is a precision alignment assembly. The Positioning Pin Logic is simple but effective: pins on this plate lock into pre-drilled holes in the truck frame, acting as dowels. The main spring brackets (Comp 1 & 2) are then located against these pins *before* the bolts (Comp 3) are tightened.

The ‘shim’ aspect of this assembly is also critical. It allows for fine-tuning the bracket’s position to compensate for minor variations in the frame. This part makes the installation of a new Mid-Bridge Bolted Suspension Bracket both precise and repeatable, which is essential for correct tandem-axle geometry.

Core 3: The “Torque Control” Logic (The Reaction Rod Brackets)

This group of components works with the Mid-Bridge Bolted Suspension Bracket system to manage axle torque. The reaction rods (or ‘torque rods’) prevent the axle from rotating during acceleration and braking. These brackets are the frame-side anchor points for those rods.

1. Component: ‘Reaction rod upper bracket on mid-bridge assy’ (2919210-65B) – Qty 1
This (Comp 5) is the complete assembly for the *middle* axle’s upper reaction rod. It includes the main bracket (‘2919211-65B’) and ‘Elastic dowel pins’ (‘2919201-A2E’, ‘2919202-A2E’). The Elastic Pin Logic ensures a tight, vibration-dampening fit, preventing the bracket from shifting or rattling under load.

2. Component: ‘Reaction rod rear upper bracket assy’ (2919220-65B) – Qty 1
This (Comp 6) is a similar assembly, but designed for the *rear* axle’s upper reaction rod, mounted near the Mid-Bridge Bolted Suspension Bracket. It also includes its specific bracket (‘2919212-517’) and pin. This illustrates how this system integrates suspension points for *both* axles in the tandem setup.

3. Component: ‘Bolt’ (CQ1502085T) – Qty 16
This (Comp 7) is another set of 16 high-tensile bolts. These are likely used to secure the reaction rod brackets (Comp 5 & 6) to the frame crossmembers. The use of 32 total main bolts (Comp 3 & 7) for this entire Mid-Bridge Bolted Suspension Bracket system highlights the immense forces it is designed to handle. Failure of these fasteners would lead to a loss of axle control.

Mid-Bridge Bolted Suspension Bracket: Complete 7-Part Breakdown

The following table provides the complete, detailed breakdown of all 7 component types in the Mid-Bridge Bolted Suspension Bracket assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This list is essential for ordering the correct hardware and brackets for a full chassis service. This Mid-Bridge Bolted Suspension Bracket is a serviceable assembly.

Core Specifications

The specifications for this Mid-Bridge Bolted Suspension Bracket are defined by its function as a serviceable, high-strength chassis mounting system for the tandem-axle suspension. Proper torque on all fasteners is critical for this Mid-Bridge Bolted Suspension Bracket.