Front Door Trim Panel: Deconstructing 3 Critical Parts for Flawless Driver Ergonomics

Welcome to this in-depth deconstruction of the Front Door Trim Panel, a key interior assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This guide breaks down the 3 critical component types that create the complete “electric” model trim panel, a vital part for driver comfort.

The Front Door Trim Panel is the primary touchpoint for the driver inside the cab. It is not just a cosmetic cover; it is an engineered component that houses the window switches, door handle, and armrest. It also provides essential acoustic and thermal insulation. This analysis will deconstruct the main panel assembly and its specialized vibration-proof fasteners.

Core 1: The ‘Ergonomic Shell’ Logic (The Panel Assembly)

This component is the entire foundation of the interior door system. It is a multi-layer assembly designed for structure, comfort, and electrical integration.

1. Component: ‘Left/Right front door trim panel assembly (electric)’ (6102015AD04 / 6102020AD04) – Qty 1 each
This (Comp 1) is the complete Front Door Trim Panel. The name ‘assembly’ (总成) confirms it is a pre-built unit. The note ‘(electric)’ (电动) is critical: it specifies this panel is for models with electric windows, featuring the necessary cutouts for the switch pods.

The Structural Logic comes from its core. The Front Door Trim Panel is built on a rigid, molded substrate, typically ABS plastic or a polypropylene composite. This substrate is precision-molded with all the necessary bosses, locators, and clip-receivers. This core is what gives the panel its shape and strength.

The Ergonomic Logic is the “skin.” This rigid core is then wrapped in a durable, easy-to-clean vinyl or fabric, often with a thin foam backing. This layer provides the soft-touch feel, the color, and the texture that the driver interacts with, creating a comfortable and professional cab environment.

The Acoustic Logic is a key hidden feature. The reverse side of the Front Door Trim Panel is often lined with a pressed-felt or shoddy-pad material. This, combined with the panel itself and the separate sealing membrane (System 149), acts as a powerful acoustic barrier. It deadens sound from the road, tires, and wind, which is crucial for reducing driver fatigue on long-haul routes.

The Integration Logic is what defines this part. This Front Door Trim Panel is the “housing” for multiple other systems. It is designed to accept:

• The Front Door Armrest (System 149)
• The Inner Handle Assembly (System 143)
• The electric window/lock switch pod (for this “electric” version)
• The door’s main audio speaker and grille
• A map pocket or storage bin

A common failure mode for any Front Door Trim Panel is delamination, where the outer vinyl skin peels away from the rigid core due to heat and sun. The other common failure is breaking the plastic mounting clips on the back during removal.

Core 2: The ‘Vibration-Proof’ Logic (The Fastener System)

This component group represents the six critical *screws* that provide the primary structural mounting for the Front Door Trim Panel. Note that the panel is also held by numerous plastic clips (not listed).

1. Component: ‘Cross recessed flat round head combination screw’ (Q2360625F6) – Qty 4
2. Component: ‘Cross recessed flat round head combination screw’ (Q2360625) – Qty 2
These (Comp 2 and 3) are the six key fasteners, 3 per door, that provide the real strength.

The “Combination” Logic is the most important detail. Both part numbers represent combination screws, which have a pre-installed, captive spring lock washer. This is a non-negotiable feature for a high-vibration environment.

The Location Logic is key to service. The Front Door Trim Panel is first aligned using its plastic clips. Then, these six structural screws are installed. They are typically hidden in plain sight:

• Inside the armrest/pull-handle cavity (securing the armrest).
• Behind the inner door latch handle.
• At the very top corner, near the mirror or A-pillar.

The Vibration-Proof Logic is why they are used. A truck door is slammed thousands of times. The constant vibration from a diesel engine and rough roads would cause a normal screw to back out, leading to squeaks and rattles.

The spring washer on each of these 6 screws exerts constant tension, “locking” the thread and preventing it from ever loosening. This ensures the Front Door Trim Panel remains tight and silent. The two different part numbers (F6 vs. no suffix) likely denote minor variations in length or finish for their specific locations.

The Service Logic is critical. To remove the Front Door Trim Panel for any service (like accessing the window regulator), a technician must first locate and remove all six of these screws. Only then can the panel be safely “popped” off its plastic clips without breaking the panel.

Front Door Trim Panel: Complete 3-Part Breakdown

The following table provides the complete, detailed breakdown of all 3 component types in the Front Door Trim Panel assembly (System 150, Electric) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the Front Door Trim Panel are defined by its role as the primary ergonomic and electronic interface for the driver.