FAW J6P Fan Guard: Deconstructing 46 Critical Parts for Flawless Airflow Control

This is an expert technical deconstruction of the FAW J6P Fan Guard (also known as the ‘Fan shroud’, Comp 2) and its 45-part mounting assembly from Chapter 37. This system is critical to the thermal management of the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This component is not a simple “guard”; it is an “Aerodynamic Logic” tool.

The FAW J6P Fan Guard creates a “vacuum tunnel,” forcing the engine fan (see Chapter 20) to pull 100% of its air *through* the ‘Radiator assy’ (Comp 1). Without this shroud, a fan is extremely inefficient, pulling air from the “path of least resistance” (the sides) and “stalling.” This “Airflow Funnel Logic” is the difference between peak cooling and catastrophic overheating.

This guide is essential for fleet technicians and parts specialists. The FAW J6P Fan Guard is made of a composite polymer, and its #1 enemy is vibration, which causes fatigue cracks. We will deconstruct the entire 46-part system, focusing on the “Airflow Logic” (the guard itself), the “Heat Exchange Context” (the radiator it serves), and the “Anti-Vibration Logic” (the complex web of brackets, tie-rods, and fasteners that protect it).

Core 1: The “Airflow Funnel” Logic (Component 2)

This component is the “hero” of this assembly. All other 45 parts are in service to this component’s function.

1. Component: ‘Fan shroud’ (1309010-14B)
This (Comp 2) *is* the FAW J6P Fan Guard. Its “Aerodynamic Logic” is more complex than it appears. It is not a simple “box” or “guard.” It is an engineered “shroud” or “tunnel” designed to optimize airflow.

The “Tip Clearance Logic” is the most critical design element. This refers to the *tiny, precise gap* between the ends of the fan blades and the inner “tunnel” of the FAW J6P Fan Guard. If this gap is too large, air “recirculates” from the high-pressure side back to the low-pressure side, “stalling” the fan and destroying its efficiency.

This “Vacuum Logic” is its entire purpose. The FAW J6P Fan Guard creates a “sealed” environment, forcing the fan to pull a “vacuum” *across the entire surface area* of the ‘Radiator assy’ (Comp 1) fins. This ensures even cooling and prevents “hot spots.”

“Material Logic” is also key. This part is made from a “glass-reinforced polymer” (a composite). It must be lightweight, but also rigid enough to not “flex” or “warp” from the 100°C+ heat radiating off the engine. It must also absorb constant, high-frequency vibration.

The “Failure Mode Logic” is “fatigue cracking.” A heavy-duty truck chassis flexes constantly. This vibration is the #1 enemy of the FAW J6P Fan Guard. A small crack, starting from a mounting bolt, will “spider” across the shroud, breaking the “vacuum seal” and causing an immediate, drastic loss in cooling performance.

Core 2: The “Heat Exchange” Context (Component 1)

The FAW J6P Fan Guard is useless without the component it is designed to “serve”: the ‘Radiator assy’.

1. Component: ‘Radiator assy’ (1301010-14B)
This (Comp 1) is the “Heat Exchange Logic.” It is a large, passive “heat sink” for both the engine coolant and the turbocharger’s “charge air” (via the intercooler). As a “passive” device, it relies 100% on *airflow* to dissipate heat.

The “Symbiotic Logic” is that the FAW J6P Fan Guard (Comp 2) is *mounted directly* to the frame of the ‘Radiator assy’ (Comp 1). Its design “seals” it against the radiator’s edges. This “Matched Set Logic” ensures that any air pulled by the fan *must* first pass *through* the radiator’s fins.

The survival of the FAW J6P Fan Guard is therefore directly “tied” to the survival of the radiator. The radiator provides the “mounting-face” and “structural support” for the fan shroud.

Core 3: The “Anti-Vibration” Mounting Logic (The Guard’s Life Support)

This group represents the complex “Vibration Isolation Logic.” Since the FAW J6P Fan Guard is (brittle) composite and the chassis/engine (vibrating) is steel, this system is what prevents the FAW J6P Fan Guard from “shaking” itself to pieces.

1. The “Isolation Logic” (Components 11, 12, 13)
The entire ‘Radiator assy’ (which holds the fan guard) sits on a ‘Radiator bottom crossmember assy’ (1302030-61B). This “shelf” is held by the ‘Radiator left support’ (1302027-70U) and ‘Radiator right support’ (1302028-70U). These “supports” use large rubber “isolator” bushings (see Chapter 38) to “damp” the raw vibration from the frame.

2. The “Anti-Sway Logic” (Components 18, 19)
This is the “Shearing Force Logic” protection. The ‘Tie rod assy’ (1302050-01) and ‘Tie rod upper support’ (1302041-14B) are diagonal stabilizers. When the truck hits a pothole, the chassis “flexes.” These tie rods prevent the radiator and the attached FAW J6P Fan Guard from being “twisted” or “swayed,” which would cause an instant “fatigue crack.”

3. The “Frame Logic” (Components 8, 22, 26, 33, 35)
This “web” of steel (‘Radiator connecting plate’ (1301020-61B), ‘Radiator support plate’ (1302040-14B), etc.) is the “Structural Logic.” It creates a “rigid cage” around the “isolated” radiator, providing the secure mounting points for the FAW J6P Fan Guard.

Core 4: The “System Integration” Logic (SSU & Plumbing)

This final group includes all “Smallest Serviceable Units” (SSU) and the “Plumbing” that must co-exist with the FAW J6P Fan Guard.

1. The “Fastener Logic” (Bolts, Nuts, Washers)
This includes all “Hardware Logic,” such as ‘Hexagon flange bolt’ (Q1840816, Q1841230, etc.), ‘Combination bolt’ (CQ1460820), and ‘Hexagon nuts’ (CQ34010, CQ34008, etc.). These are the “Vibration-Proof Logic” fasteners.

A single loose bolt (e.g., Comp 7, which holds the FAW J6P Fan Guard‘s support plate) will create a “vibration hot spot” and “hammer” the composite shroud until it cracks. This is why high-tensile, “flanged” (self-locking) hardware is essential.

2. The “Plumbing Logic” (Hoses & Clamps)
This group includes all the hoses (‘Radiator inlet hose’ (1303011-14B), ‘Radiator outlet hose’ (1303021-14B), etc.) and their high-torque ‘Banjo-type hose clamps’ (CQ67670B, etc.).

The “Routing Logic” of this plumbing is designed *around* the FAW J6P Fan Guard. The hoses must be “flexible” to absorb the vibration between the “engine” and the “radiator” assembly. They are routed to clear the shroud and, more importantly, the “spinning” fan (Chapter 20) *inside* the shroud.

FAW J6P Fan Guard & Mounting Assembly Parts List

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

Core Specifications

The specifications for the FAW J6P Fan Guard system are defined by its function as the primary airflow control unit for the radiator assembly.