FAW J6P Pipework: Deconstructing 46 Critical Parts for Leak-Proof Thermal Control

This is a complete technical analysis of the FAW J6P Pipework system (Chapter 37), the “arterial network” for the thermal management system on the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This 46-component group is not just a set of hoses; it is an engineered “Fluid & Air Transport Logic” system. Its integrity is paramount for preventing coolant leaks, boost leaks, and catastrophic engine overheating.

The FAW J6P Pipework system must simultaneously manage three “Fluid Logic” circuits. The “Primary Coolant Logic” (the main radiator hoses) moves high-temperature engine coolant. The “Charge Air Logic” (the intercooler hose) transports high-pressure, hot air from the turbo. The “Degassing Logic” (a network of small pipes) scavenges and removes destructive air bubbles from the system.

This guide is an essential resource for chassis technicians, fleet maintenance managers, and parts specialists. We will deconstruct every component of the FAW J6P Pipework assembly. We will analyze the “Primary Circulation Logic” (the main coolant hoses and clamps), the “Charge Air Logic” (the boost hose), the “Degassing Logic” (the air bleed network), and the “Sealing Logic” (the critical banjo clamps that ensure a leak-proof system).

Core 1: The “Primary Circulation” Pipework (Components 3, 4, 5, 6)

This group represents the “main arteries” of the FAW J6P Pipework system, responsible for moving the bulk of the engine coolant. A failure here is catastrophic.

1. Component: ‘Radiator inlet hose’ (1303011-14B)
This (Comp 4) is the “Hot Side Logic.” This high-temperature hose carries 90°C+ coolant *from* the engine’s thermostat housing *to* the ‘Radiator assy’ (Comp 1). It is engineered from reinforced EPDM rubber to withstand high heat, high pressure, and constant engine vibration.

2. Component: ‘Radiator outlet hose’ (1303021-14B)
This (Comp 6) is the “Cold Side Logic.” It carries the now-cooled (e.g., 80°C) coolant *from* the bottom of the radiator *back to* the ‘Water Pump’ (Chapter 19) to re-enter the engine block. This hose is under “suction” from the water pump, so its internal reinforcement must prevent it from “collapsing” inward.

3. Component: ‘Banjo-type hose clamp B model’ (CQ67670B, CQ67680B)
These (Comp 3, 5) are the “Sealing Integrity Logic” and are the most critical “Smallest Serviceable Units” in the FAW J6P Pipework system. These are not simple worm-gear clamps. A “Banjo-type” (or “T-Bolt”) clamp provides a 360-degree, high-torque “Clamping Force Logic.” This ensures a perfect, leak-proof seal on the reinforced hoses, preventing coolant loss, which would lead to rapid engine overheating.

Core 2: The “Charge Air” Pipework Logic (Components 28, 29)

This part of the FAW J6P Pipework system handles “air,” not “coolant.” It manages the high-pressure “boost” from the turbocharger.

1. Component: ‘Intercooler connecting hose’ (1311034-50A)
This (Comp 28) is the “Boost Logic” hose. The ‘Radiator assy’ (Comp 1) is a dual-core unit containing the “Charge Air Cooler” (Intercooler). This hose’s “logic” is to connect the “cold side” of the intercooler *to* the engine’s intake manifold.

This FAW J6P Pipework component is engineered to handle 20-30+ PSI of boost pressure, oil mist (from the turbo), and high temperatures. It is likely made of multi-layer reinforced silicone to prevent it from “ballooning” or bursting under boost.

2. Component: ‘Banjo-type hose clamp B model’ (CQ67635B)
This (Comp 29) is the “Boost Sealing Logic.” A “boost leak” is a common failure point that is catastrophic for performance. These high-torque clamps (Qty 3) are essential to “lock” the ‘Intercooler connecting hose’ (Comp 28) onto the rigid pipes. A “boost leak” from a failed clamp causes an immediate loss of power, excessive black smoke, and a “check engine” light.

Core 3: The “Degassing & Bypass” Pipework Logic

This is the “System Breathing Logic” network within the FAW J6P Pipework. Its function is to remove trapped air, the #1 enemy of a cooling system.

1. The “Degassing Network” (Components 39, 40, 46, 17)
This includes the ‘Radiator rear degas pipe’ (1311069-76A), ‘Radiator degas pipe’ (1311063-61B), and ‘Engine degas pipe assy’ (1311025-138). This “Scavenging Logic” uses small-bore pipes to continuously “suck” air from the highest points of the system (the top of the radiator and the engine head).

This “Air-Free Logic” is critical. Trapped air creates “steam pockets” that don’t transfer heat, causing “hot spots” that can warp a cylinder head. This FAW J6P Pipework routes all scavenged air to the ‘Reservoir’ (1302052-01) (Comp 17), also known as the “Expansion Tank,” where the air is safely vented, and the coolant is returned to the system.

2. The “Bypass Network” (Components 30, 31, 37, 41)
This group of FAW J6P Pipework includes the ‘Return water pipe’ (1311062-14B), ‘Connection steel pipe assy’ (1311035-61B), ‘Front return water pipe’ (1311034-61B), and ‘Connecting pipe assy’ (1311025-61B). This is the “Bypass Logic” that allows hot coolant to flow to the “FAW J6P Cab Heater” (see Chapter 52), even when the engine’s main thermostat is closed.

Core 4: The “Anti-Vibration” Logic (The Context for the Pipework)

The FAW J6P Pipework (hoses) must be flexible for a specific reason: the “engine” and the “radiator” do not move as one. This group explains the “Vibration Isolation Logic” that the pipework must compensate for.

1. The “Isolated Mounting Logic” (Components 11, 12, 13)
The ‘Radiator assy’ (Comp 1) sits on a ‘Radiator bottom crossmember’ (1302030-61B) and is held by “isolated” ‘Supports’ (1302027-70U, 1302028-70U). These mounts (see Chapter 38) use rubber to “damp” vibration.

2. The “Anti-Sway Logic” (Components 18, 19)
The ‘Tie rod assy’ (1302050-01) and ‘Tie rod upper support’ (1302041-14B) are diagonal stabilizers. They prevent the 30kg+ radiator from “swaying” and “shearing” when the truck’s chassis flexes.

This “Differential Movement Logic” is the final piece of the puzzle. The FAW J6P Pipework system, specifically the flexible hoses (Comp 4, 6, 28), are the “Flexible Coupling Logic” that “bridges the gap” between the vibrating engine and the “sway-damped” radiator. This prevents the “Anti-Vibration Logic” from “tearing” the rigid radiator ports off the engine.

FAW J6P Pipework & Radiator Assembly Parts List

The following table provides the complete, detailed breakdown of all 46 component types in the FAW J6P Pipework and thermal management assembly (Chapter 37) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Pipework system are defined by its function as the leak-proof transport network for the engine’s coolant and charge air.