FAW J6P Expansion Tank Bracket: Deconstructing 20 Critical Parts for Flawless Vibration Control

This is a complete technical deconstruction of the FAW J6P Expansion Tank Bracket system (Chapter 38). This is not a single part, but a 20-component “Structural Mounting” and “Anti-Vibration Logic” assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. Its sole purpose is to protect the ‘Expansion tank assy’ (Comp 2) from the chassis’s destructive vibration.

The “Vibration Isolation Logic” is the key. The ‘Expansion tank’ (Comp 2) is made of a “heat-stabilized polymer,” which is “brittle” against the high-frequency vibrations and “chassis flex” of an off-road dump truck. The FAW J6P Expansion Tank Bracket (Comp 11, 18, 20) forms a “rigid steel cage” that “isolates” this polymer tank.

A failure of the FAW J6P Expansion Tank Bracket will lead to “fatigue failure” of the tank. The tank will “chafe” against the steel frame, “crack” at its mounting points, and cause a “catastrophic coolant loss,” leading to immediate engine overheating. This “Anti-Fatigue Logic” is what makes this bracket system so critical.

This guide is an essential resource for chassis technicians and fleet managers. We will deconstruct all 20 components, analyzing the “Structural Cradle Logic” (the brackets themselves), the “Held Component Logic” (the tank they protect), the “Plumbing Logic” (the hoses), and the “Anti-Chafe Logic” (the critical clamps and ties that complete the FAW J6P Expansion Tank Bracket system).

Core 1: The “Structural Cradle” Logic (Components 11, 18, 20)

This group *is* the FAW J6P Expansion Tank Bracket system. These three heavy-gauge steel assemblies form the “rigid cage” that protects the polymer tank.

1. Component: ‘Expansion tank bracket assy’ (1311040-61C)
This (Comp 11) is the “Cradle Logic.” It is the main, “form-fitted” bracket that the ‘Expansion tank assy’ (Comp 2) *sits in*. Its “logic” is to “bear the static load” (the 10kg+ “sloshing” weight of the coolant) and “distribute the dynamic load” (the vibration).

This FAW J6P Expansion Tank Bracket is specifically engineered to “isolate” the tank. It “damps” the high-frequency vibration from the chassis, preventing that “shaking” force from being transferred to the “brittle” polymer tank, which would otherwise “fatigue crack” in a matter of days.

2. Component: ‘Bracket assy’ (1311070-14B) & ‘Bracket assy’ (1311075-14B)
These (Comp 18, 20) are the “Support Strut Logic.” These are the “tie-in” brackets that “anchor” the main ‘Cradle’ (Comp 11) to the truck’s main chassis frame.

Their “Structural Triangulation Logic” is what gives the FAW J6P Expansion Tank Bracket its immense “rigidity.” This prevents the ‘Cradle’ from “flexing” or “swaying” when the truck hits a pothole, which is a “shearing force” that would otherwise “tear” the tank apart.

Core 2: The “Held Component” Logic (Components 1, 2)

The FAW J6P Expansion Tank Bracket system exists to serve and protect these two critical “vulnerable” components.

1. Component: ‘Expansion tank assy’ (1311020-76A)
This (Comp 2) is the “Protected Asset Logic.” It is the main “reservoir” for the cooling system, acting as the “lung” (for thermal expansion) and the “air-trap” (for degassing).

However, it is made of “heat-stabilized polymer” (plastic). The “Failure Logic” is that this material, while excellent for heat/pressure, is “brittle” against “fatigue.” The FAW J6P Expansion Tank Bracket (Comp 11) is the “Vibration Isolation Logic” that prevents this “fatigue cracking.”

2. Component: ‘Pressure cap assy’ (1304010-50A)
This (Comp 1) is the “Access Logic.” The FAW J6P Expansion Tank Bracket is also an “Ergonomic Logic” tool. It is designed to “position” the ‘Expansion tank’ (Comp 2) at the “highest, most accessible point” of the cooling system.

This “Positioning Logic” ensures that (A) the ‘Pressure cap’ is the “air vent” for the whole system, and (B) it is “accessible” for the driver to perform daily “coolant level checks” without having to remove other components.

Core 3: The “Flexible Plumbing” Logic (Hoses & Pipes)

This group represents the “Flexible Logic” that the *rigid* FAW J6P Expansion Tank Bracket is designed to “anchor” and “manage.” These hoses must “bridge the gap” between the *vibrating* engine and the *isolated* tank.

1. The “Degas” Hoses (Components 7, 8, 15)
This is the “Air Scavenging Logic” network. It includes ‘Degas hose’ (1311068-61B), ‘Rear degas hose’ (1311069-61B), and ‘Degas hose’ (1311036-14B). These hoses “suck” air bubbles from the engine/radiator and “feed” them to the ‘Expansion tank’ (Comp 2).

2. The “Return” Hoses (Components 5, 12)
This is the “Coolant Return Logic.” The ‘Rear return water hose’ (1311033-61B) and ‘Return water hose’ (1311033-14B) take the “air-free” coolant *from* the bottom of the tank and return it to the “cold” side of the system (near the water pump).

3. The “Rigid” Pipe (Component 19)
The ‘Rear return water steel pipe assy’ (1311065-14B) is the “Rigid Plumbing Logic.” This steel pipe is likely “anchored” to the chassis by the FAW J6P Expansion Tank Bracket system (e.g., Comp 18 or 20), providing a “fixed point” for the flexible ‘Return water hose’ (Comp 5) to connect to.

Core 4: The “Integrity” Logic (Clamps, Ties & Fasteners)

This is the “Smallest Serviceable Unit” (SSU) group. These SSUs are what “lock” the FAW J6P Expansion Tank Bracket to the chassis and “manage” the plumbing.

1. The “Fastener” Logic (Components 3, 10, 16)
The ‘Combination bolt’ (CQ1460825) is the “Structural Hardware Logic.” A total of eleven (11) of these “flanged” (self-locking) bolts are used to “secure” the steel FAW J6P Expansion Tank Bracket (Comp 11, 18, 20) to the truck’s main frame, ensuring it never “rattles” loose.

2. The “Sealing” Logic (Components 4, 6, 13)
This is the “Leak-Proof Logic.” The ‘Banjo-type hose clamp B model’ (CQ67640B, CQ67622B) (12 total) and ‘Hose clamp’ (1311077-61B) (2 total) are “high-torque” clamps. They are “vibration-proof” and provide the 360-degree “clamping force” needed to “seal” the hoses, preventing coolant loss.

3. The “Anti-Chafe” Logic (Components 9, 14, 17)
This is the “Plumbing Protection Logic” and a key function of the FAW J6P Expansion Tank Bracket system. The ‘Dual pipe clamp assy’ (Comp 9), ‘Single pipe clamp’ (Comp 17), and six (6) ‘Plastic zip ties’ (Comp 14) are the “Engineered Routing Logic.”

Their “logic” is to “anchor” the flexible degas hoses (Comp 7, 8, 15) to the rigid FAW J6P Expansion Tank Bracket or chassis. This prevents the hoses from “chafing” (rubbing) against the vibrating engine, which would cause a “rub-through,” a coolant leak, and engine overheating.

FAW J6P Expansion Tank Bracket & Assembly Parts List

The following table provides the complete, detailed breakdown of all 20 component types in the FAW J6P Expansion Tank Bracket and mounting assembly (Chapter 38) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Expansion Tank Bracket system are defined by its function as the structural, anti-vibration mount for the polymer tank.